From 7738254f83c86e46795b34db834d18af97197d8d Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Thu, 17 Mar 2022 13:21:00 +0400 Subject: [PATCH 01/83] refactor timeline memory state management --- control_plane/src/storage.rs | 16 +- pageserver/src/bin/pageserver.rs | 49 +- pageserver/src/http/models.rs | 96 +++- pageserver/src/http/routes.rs | 188 +++++-- pageserver/src/layered_repository.rs | 471 ++++++++---------- pageserver/src/page_service.rs | 16 +- pageserver/src/remote_storage.rs | 37 +- pageserver/src/remote_storage/storage_sync.rs | 274 +++++----- .../remote_storage/storage_sync/download.rs | 73 +-- .../src/remote_storage/storage_sync/index.rs | 126 ++++- .../src/remote_storage/storage_sync/upload.rs | 110 ++-- pageserver/src/repository.rs | 257 ++++++---- pageserver/src/tenant_mgr.rs | 169 +++---- pageserver/src/timelines.rs | 348 +++++++------ pageserver/src/walreceiver.rs | 56 ++- .../batch_others/test_remote_storage.py | 39 +- .../batch_others/test_tenant_relocation.py | 81 ++- test_runner/fixtures/zenith_fixtures.py | 89 ++++ zenith/src/main.rs | 105 ++-- zenith_utils/src/http/error.rs | 6 + 20 files changed, 1484 insertions(+), 1122 deletions(-) diff --git a/control_plane/src/storage.rs b/control_plane/src/storage.rs index f6b7173067..ef43ba3c1e 100644 --- a/control_plane/src/storage.rs +++ b/control_plane/src/storage.rs @@ -1,4 +1,3 @@ -use std::convert::TryFrom; use std::io::Write; use std::net::TcpStream; use std::path::PathBuf; @@ -10,7 +9,7 @@ use anyhow::{bail, Context}; use nix::errno::Errno; use nix::sys::signal::{kill, Signal}; use nix::unistd::Pid; -use pageserver::http::models::{TenantCreateRequest, TimelineCreateRequest, TimelineInfoResponse}; +use pageserver::http::models::{TenantCreateRequest, TimelineCreateRequest}; use pageserver::timelines::TimelineInfo; use postgres::{Config, NoTls}; use reqwest::blocking::{Client, RequestBuilder, Response}; @@ -358,7 +357,7 @@ impl PageServerNode { } pub fn timeline_list(&self, tenant_id: &ZTenantId) -> anyhow::Result> { - let timeline_infos: Vec = self + let timeline_infos: Vec = self .http_request( Method::GET, format!("{}/tenant/{}/timeline", self.http_base_url, tenant_id), @@ -367,10 +366,7 @@ impl PageServerNode { .error_from_body()? .json()?; - timeline_infos - .into_iter() - .map(TimelineInfo::try_from) - .collect() + Ok(timeline_infos) } pub fn timeline_create( @@ -392,10 +388,8 @@ impl PageServerNode { }) .send()? .error_from_body()? - .json::>()?; + .json::>()?; - timeline_info_response - .map(TimelineInfo::try_from) - .transpose() + Ok(timeline_info_response) } } diff --git a/pageserver/src/bin/pageserver.rs b/pageserver/src/bin/pageserver.rs index d37ba0cece..05fb14daca 100644 --- a/pageserver/src/bin/pageserver.rs +++ b/pageserver/src/bin/pageserver.rs @@ -18,7 +18,10 @@ use daemonize::Daemonize; use pageserver::{ config::{defaults::*, PageServerConf}, - http, page_cache, page_service, remote_storage, tenant_mgr, thread_mgr, + http, page_cache, page_service, + remote_storage::{self, SyncStartupData}, + repository::TimelineSyncStatusUpdate, + tenant_mgr, thread_mgr, thread_mgr::ThreadKind, timelines, virtual_file, LOG_FILE_NAME, }; @@ -227,11 +230,47 @@ fn start_pageserver(conf: &'static PageServerConf, daemonize: bool) -> Result<() } let signals = signals::install_shutdown_handlers()?; - let sync_startup = remote_storage::start_local_timeline_sync(conf) + + // Initialize repositories with locally available timelines. + // Timelines that are only partially available locally (remote storage has more data than this pageserver) + // are scheduled for download and added to the repository once download is completed. + let SyncStartupData { + remote_index, + local_timeline_init_statuses, + } = remote_storage::start_local_timeline_sync(conf) .context("Failed to set up local files sync with external storage")?; - // Initialize tenant manager. - tenant_mgr::set_timeline_states(conf, sync_startup.initial_timeline_states); + for (tenant_id, local_timeline_init_statuses) in local_timeline_init_statuses { + // initialize local tenant + let repo = tenant_mgr::load_local_repo(conf, tenant_id, &remote_index); + for (timeline_id, init_status) in local_timeline_init_statuses { + match init_status { + remote_storage::LocalTimelineInitStatus::LocallyComplete => { + debug!("timeline {} for tenant {} is locally complete, registering it in repository", tenant_id, timeline_id); + // Lets fail here loudly to be on the safe side. + // XXX: It may be a better api to actually distinguish between repository startup + // and processing of newly downloaded timelines. + repo.apply_timeline_remote_sync_status_update( + timeline_id, + TimelineSyncStatusUpdate::Downloaded, + ) + .with_context(|| { + format!( + "Failed to bootstrap timeline {} for tenant {}", + timeline_id, tenant_id + ) + })? + } + remote_storage::LocalTimelineInitStatus::NeedsSync => { + debug!( + "timeline {} for tenant {} needs sync, \ + so skipped for adding into repository until sync is finished", + tenant_id, timeline_id + ); + } + } + } + } // initialize authentication for incoming connections let auth = match &conf.auth_type { @@ -253,7 +292,7 @@ fn start_pageserver(conf: &'static PageServerConf, daemonize: bool) -> Result<() None, "http_endpoint_thread", move || { - let router = http::make_router(conf, auth_cloned); + let router = http::make_router(conf, auth_cloned, remote_index); endpoint::serve_thread_main(router, http_listener, thread_mgr::shutdown_watcher()) }, )?; diff --git a/pageserver/src/http/models.rs b/pageserver/src/http/models.rs index 9844e7ea82..8827713f11 100644 --- a/pageserver/src/http/models.rs +++ b/pageserver/src/http/models.rs @@ -1,11 +1,12 @@ -use crate::timelines::TimelineInfo; -use anyhow::{anyhow, bail, Context}; +use anyhow::Context; use serde::{Deserialize, Serialize}; use zenith_utils::{ lsn::Lsn, zid::{HexZTenantId, HexZTimelineId, ZNodeId, ZTenantId, ZTimelineId}, }; +use crate::timelines::{LocalTimelineInfo, TimelineInfo}; + #[derive(Serialize, Deserialize)] pub struct TimelineCreateRequest { pub new_timeline_id: Option, @@ -18,8 +19,28 @@ pub struct TenantCreateRequest { pub new_tenant_id: Option, } +#[derive(Clone)] +pub enum TimelineInfoV1 { + Local { + timeline_id: ZTimelineId, + tenant_id: ZTenantId, + last_record_lsn: Lsn, + prev_record_lsn: Option, + ancestor_timeline_id: Option, + ancestor_lsn: Option, + disk_consistent_lsn: Lsn, + current_logical_size: Option, + current_logical_size_non_incremental: Option, + }, + Remote { + timeline_id: ZTimelineId, + tenant_id: ZTenantId, + disk_consistent_lsn: Lsn, + }, +} + #[derive(Serialize, Deserialize)] -pub struct TimelineInfoResponse { +pub struct TimelineInfoResponseV1 { pub kind: String, #[serde(with = "hex")] timeline_id: ZTimelineId, @@ -34,10 +55,10 @@ pub struct TimelineInfoResponse { current_logical_size_non_incremental: Option, } -impl From for TimelineInfoResponse { - fn from(other: TimelineInfo) -> Self { +impl From for TimelineInfoResponseV1 { + fn from(other: TimelineInfoV1) -> Self { match other { - TimelineInfo::Local { + TimelineInfoV1::Local { timeline_id, tenant_id, last_record_lsn, @@ -47,23 +68,23 @@ impl From for TimelineInfoResponse { disk_consistent_lsn, current_logical_size, current_logical_size_non_incremental, - } => TimelineInfoResponse { + } => TimelineInfoResponseV1 { kind: "Local".to_owned(), timeline_id, tenant_id, disk_consistent_lsn: disk_consistent_lsn.to_string(), last_record_lsn: Some(last_record_lsn.to_string()), - prev_record_lsn: Some(prev_record_lsn.to_string()), + prev_record_lsn: prev_record_lsn.map(|lsn| lsn.to_string()), ancestor_timeline_id: ancestor_timeline_id.map(HexZTimelineId::from), ancestor_lsn: ancestor_lsn.map(|lsn| lsn.to_string()), - current_logical_size: Some(current_logical_size), + current_logical_size, current_logical_size_non_incremental, }, - TimelineInfo::Remote { + TimelineInfoV1::Remote { timeline_id, tenant_id, disk_consistent_lsn, - } => TimelineInfoResponse { + } => TimelineInfoResponseV1 { kind: "Remote".to_owned(), timeline_id, tenant_id, @@ -79,10 +100,10 @@ impl From for TimelineInfoResponse { } } -impl TryFrom for TimelineInfo { +impl TryFrom for TimelineInfoV1 { type Error = anyhow::Error; - fn try_from(other: TimelineInfoResponse) -> anyhow::Result { + fn try_from(other: TimelineInfoResponseV1) -> anyhow::Result { let parse_lsn_hex_string = |lsn_string: String| { lsn_string .parse::() @@ -91,33 +112,68 @@ impl TryFrom for TimelineInfo { let disk_consistent_lsn = parse_lsn_hex_string(other.disk_consistent_lsn)?; Ok(match other.kind.as_str() { - "Local" => TimelineInfo::Local { + "Local" => TimelineInfoV1::Local { timeline_id: other.timeline_id, tenant_id: other.tenant_id, last_record_lsn: other .last_record_lsn - .ok_or(anyhow!("Local timeline should have last_record_lsn")) + .ok_or(anyhow::anyhow!( + "Local timeline should have last_record_lsn" + )) .and_then(parse_lsn_hex_string)?, prev_record_lsn: other .prev_record_lsn - .ok_or(anyhow!("Local timeline should have prev_record_lsn")) - .and_then(parse_lsn_hex_string)?, + .map(parse_lsn_hex_string) + .transpose()?, ancestor_timeline_id: other.ancestor_timeline_id.map(ZTimelineId::from), ancestor_lsn: other.ancestor_lsn.map(parse_lsn_hex_string).transpose()?, disk_consistent_lsn, - current_logical_size: other.current_logical_size.ok_or(anyhow!("No "))?, + current_logical_size: other.current_logical_size, current_logical_size_non_incremental: other.current_logical_size_non_incremental, }, - "Remote" => TimelineInfo::Remote { + "Remote" => TimelineInfoV1::Remote { timeline_id: other.timeline_id, tenant_id: other.tenant_id, disk_consistent_lsn, }, - unknown => bail!("Unknown timeline kind: {}", unknown), + unknown => anyhow::bail!("Unknown timeline kind: {}", unknown), }) } } +fn from_local( + tenant_id: ZTenantId, + timeline_id: ZTimelineId, + local: &LocalTimelineInfo, +) -> TimelineInfoV1 { + TimelineInfoV1::Local { + timeline_id, + tenant_id, + last_record_lsn: local.last_record_lsn, + prev_record_lsn: local.prev_record_lsn, + ancestor_timeline_id: local.ancestor_timeline_id.map(ZTimelineId::from), + ancestor_lsn: local.ancestor_lsn, + disk_consistent_lsn: local.disk_consistent_lsn, + current_logical_size: local.current_logical_size, + current_logical_size_non_incremental: local.current_logical_size_non_incremental, + } +} + +impl From for TimelineInfoV1 { + fn from(t: TimelineInfo) -> Self { + match (t.local.as_ref(), t.remote.as_ref()) { + (None, None) => unreachable!(), + (None, Some(remote)) => TimelineInfoV1::Remote { + timeline_id: t.timeline_id, + tenant_id: t.tenant_id, + disk_consistent_lsn: remote.remote_consistent_lsn.unwrap_or(Lsn(0)), + }, + (Some(local), None) => from_local(t.tenant_id, t.timeline_id, local), + (Some(local), Some(_)) => from_local(t.tenant_id, t.timeline_id, local), + } + } +} + #[derive(Serialize)] pub struct StatusResponse { pub id: ZNodeId, diff --git a/pageserver/src/http/routes.rs b/pageserver/src/http/routes.rs index 8365601042..2d913afe4e 100644 --- a/pageserver/src/http/routes.rs +++ b/pageserver/src/http/routes.rs @@ -3,6 +3,7 @@ use std::sync::Arc; use anyhow::Result; use hyper::StatusCode; use hyper::{Body, Request, Response, Uri}; +use tokio::sync::RwLock; use tracing::*; use zenith_utils::auth::JwtAuth; use zenith_utils::http::endpoint::attach_openapi_ui; @@ -16,24 +17,32 @@ use zenith_utils::http::{ request::parse_request_param, }; use zenith_utils::http::{RequestExt, RouterBuilder}; -use zenith_utils::zid::{HexZTenantId, ZTimelineId}; +use zenith_utils::zid::{HexZTenantId, ZTenantTimelineId, ZTimelineId}; use super::models::{ - StatusResponse, TenantCreateRequest, TimelineCreateRequest, TimelineInfoResponse, + StatusResponse, TenantCreateRequest, TimelineCreateRequest, TimelineInfoResponseV1, + TimelineInfoV1, +}; +use crate::remote_storage::{schedule_timeline_download, RemoteTimelineIndex}; +use crate::timelines::{ + extract_remote_timeline_info, LocalTimelineInfo, RemoteTimelineInfo, TimelineInfo, }; -use crate::repository::RepositoryTimeline; -use crate::timelines::TimelineInfo; use crate::{config::PageServerConf, tenant_mgr, timelines, ZTenantId}; #[derive(Debug)] struct State { conf: &'static PageServerConf, auth: Option>, + remote_index: Arc>, allowlist_routes: Vec, } impl State { - fn new(conf: &'static PageServerConf, auth: Option>) -> Self { + fn new( + conf: &'static PageServerConf, + auth: Option>, + remote_index: Arc>, + ) -> Self { let allowlist_routes = ["/v1/status", "/v1/doc", "/swagger.yml"] .iter() .map(|v| v.parse().unwrap()) @@ -42,6 +51,7 @@ impl State { conf, auth, allowlist_routes, + remote_index, } } } @@ -88,7 +98,7 @@ async fn timeline_create_handler(mut request: Request) -> Result json_response(StatusCode::CREATED, TimelineInfoResponse::from(info))?, + Some(info) => json_response(StatusCode::CREATED, info)?, None => json_response(StatusCode::CONFLICT, ())?, }) } @@ -97,15 +107,24 @@ async fn timeline_list_handler(request: Request) -> Result, let tenant_id: ZTenantId = parse_request_param(&request, "tenant_id")?; check_permission(&request, Some(tenant_id))?; let include_non_incremental_logical_size = get_include_non_incremental_logical_size(&request); - let response_data: Vec = tokio::task::spawn_blocking(move || { + let local_timeline_infos = tokio::task::spawn_blocking(move || { let _enter = info_span!("timeline_list", tenant = %tenant_id).entered(); - crate::timelines::get_timelines(tenant_id, include_non_incremental_logical_size) + crate::timelines::get_local_timelines(tenant_id, include_non_incremental_logical_size) }) .await - .map_err(ApiError::from_err)?? - .into_iter() - .map(TimelineInfoResponse::from) - .collect(); + .map_err(ApiError::from_err)??; + + let remote_index = get_state(&request).remote_index.read().await; + let mut response_data = Vec::with_capacity(local_timeline_infos.len()); + for (timeline_id, local_timeline_info) in local_timeline_infos { + response_data.push(TimelineInfo { + tenant_id, + timeline_id, + local: Some(local_timeline_info), + remote: extract_remote_timeline_info(tenant_id, timeline_id, &remote_index), + }) + } + Ok(json_response(StatusCode::OK, response_data)?) } @@ -124,30 +143,76 @@ fn get_include_non_incremental_logical_size(request: &Request) -> bool { .unwrap_or(false) } -async fn timeline_detail_handler(request: Request) -> Result, ApiError> { +// common part for v1 and v2 handlers +async fn timeline_detail_common(request: Request) -> Result { let tenant_id: ZTenantId = parse_request_param(&request, "tenant_id")?; check_permission(&request, Some(tenant_id))?; let timeline_id: ZTimelineId = parse_request_param(&request, "timeline_id")?; + let include_non_incremental_logical_size = get_include_non_incremental_logical_size(&request); - let response_data = tokio::task::spawn_blocking(move || { - let _enter = - info_span!("timeline_detail_handler", tenant = %tenant_id, timeline = %timeline_id) - .entered(); + let span = info_span!("timeline_detail_handler", tenant = %tenant_id, timeline = %timeline_id); + + let (local_timeline_info, span) = tokio::task::spawn_blocking(move || { + let entered = span.entered(); let repo = tenant_mgr::get_repository_for_tenant(tenant_id)?; - let include_non_incremental_logical_size = - get_include_non_incremental_logical_size(&request); - Ok::<_, anyhow::Error>(TimelineInfo::from_repo_timeline( - tenant_id, - repo.get_timeline(timeline_id)?, - include_non_incremental_logical_size, - )) + let local_timeline = { + repo.get_timeline(timeline_id) + .map(|timeline| { + LocalTimelineInfo::from_repo_timeline( + timeline, + include_non_incremental_logical_size, + ) + }) + .transpose()? + }; + Ok::<_, anyhow::Error>((local_timeline, entered.exit())) }) .await - .map_err(ApiError::from_err)? - .map(TimelineInfoResponse::from)?; + .map_err(ApiError::from_err)??; - Ok(json_response(StatusCode::OK, response_data)?) + let remote_timeline_info = { + let remote_index_read = get_state(&request).remote_index.read().await; + remote_index_read + .timeline_entry(&ZTenantTimelineId { + tenant_id, + timeline_id, + }) + .map(|remote_entry| RemoteTimelineInfo { + remote_consistent_lsn: remote_entry.disk_consistent_lsn(), + awaits_download: remote_entry.get_awaits_download(), + }) + }; + + let _enter = span.entered(); + + if local_timeline_info.is_none() && remote_timeline_info.is_none() { + return Err(ApiError::NotFound( + "Timeline is not found neither locally nor remotely".to_string(), + )); + } + + Ok(TimelineInfo { + tenant_id, + timeline_id, + local: local_timeline_info, + remote: remote_timeline_info, + }) +} + +// TODO remove when console adopts v2 +async fn timeline_detail_handler_v1(request: Request) -> Result, ApiError> { + let timeline_info = timeline_detail_common(request).await?; + Ok(json_response( + StatusCode::OK, + TimelineInfoResponseV1::from(TimelineInfoV1::from(timeline_info)), + )?) +} + +async fn timeline_detail_handler_v2(request: Request) -> Result, ApiError> { + let timeline_info = timeline_detail_common(request).await?; + + Ok(json_response(StatusCode::OK, timeline_info)?) } async fn timeline_attach_handler(request: Request) -> Result, ApiError> { @@ -155,31 +220,37 @@ async fn timeline_attach_handler(request: Request) -> Result { - anyhow::bail!("Timeline with id {} is already local", timeline_id) - } - RepositoryTimeline::Remote { - id: _, - disk_consistent_lsn: _, - } => { - // FIXME (rodionov) get timeline already schedules timeline for download, and duplicate tasks can cause errors - // first should be fixed in https://github.com/zenithdb/zenith/issues/997 - // TODO (rodionov) change timeline state to awaits download (incapsulate it somewhere in the repo) - // TODO (rodionov) can we safely request replication on the timeline before sync is completed? (can be implemented on top of the #997) - Ok(()) - } - } + let span = tokio::task::spawn_blocking(move || { + let entered = span.entered(); + if tenant_mgr::get_timeline_for_tenant_load(tenant_id, timeline_id).is_ok() { + anyhow::bail!("Timeline is already present locally") + }; + Ok(entered.exit()) }) .await .map_err(ApiError::from_err)??; + let mut remote_index_write = get_state(&request).remote_index.write().await; + + let _enter = span.entered(); // entered guard cannot live across awaits (non Send) + let index_entry = remote_index_write + .timeline_entry_mut(&ZTenantTimelineId { + tenant_id, + timeline_id, + }) + .ok_or_else(|| ApiError::BadRequest("Unknown remote timeline".to_string()))?; + + if index_entry.get_awaits_download() { + return Err(ApiError::NotFound( + "Timeline download is already in progress".to_string(), + )); + } + + index_entry.set_awaits_download(true); + schedule_timeline_download(tenant_id, timeline_id); + Ok(json_response(StatusCode::ACCEPTED, ())?) } @@ -221,13 +292,17 @@ async fn tenant_create_handler(mut request: Request) -> Result) -> Result, ApiError> { pub fn make_router( conf: &'static PageServerConf, auth: Option>, + remote_index: Arc>, ) -> RouterBuilder { let spec = include_bytes!("openapi_spec.yml"); let mut router = attach_openapi_ui(endpoint::make_router(), spec, "/swagger.yml", "/v1/doc"); @@ -263,7 +339,7 @@ pub fn make_router( } router - .data(Arc::new(State::new(conf, auth))) + .data(Arc::new(State::new(conf, auth, remote_index))) .get("/v1/status", status_handler) .get("/v1/tenant", tenant_list_handler) .post("/v1/tenant", tenant_create_handler) @@ -271,7 +347,11 @@ pub fn make_router( .post("/v1/tenant/:tenant_id/timeline", timeline_create_handler) .get( "/v1/tenant/:tenant_id/timeline/:timeline_id", - timeline_detail_handler, + timeline_detail_handler_v1, + ) + .get( + "/v2/tenant/:tenant_id/timeline/:timeline_id", + timeline_detail_handler_v2, ) .post( "/v1/tenant/:tenant_id/timeline/:timeline_id/attach", diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 9e0df5dab2..c17df84689 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -35,9 +35,9 @@ use self::metadata::{metadata_path, TimelineMetadata, METADATA_FILE_NAME}; use crate::config::PageServerConf; use crate::page_cache; use crate::relish::*; -use crate::remote_storage::{schedule_timeline_checkpoint_upload, schedule_timeline_download}; +use crate::remote_storage::{schedule_timeline_checkpoint_upload, RemoteTimelineIndex}; use crate::repository::{ - BlockNumber, GcResult, Repository, RepositoryTimeline, Timeline, TimelineSyncState, + BlockNumber, GcResult, Repository, RepositoryTimeline, Timeline, TimelineSyncStatusUpdate, TimelineWriter, ZenithWalRecord, }; use crate::thread_mgr; @@ -129,27 +129,46 @@ pub struct LayeredRepository { // timeout... gc_cs: Mutex<()>, walredo_mgr: Arc, + + // provides access to timeline data sitting in the remote storage + // supposed to be used for retrieval of remote consistent lsn in walreceiver + remote_index: Arc>, + /// Makes every timeline to backup their files to remote storage. upload_relishes: bool, } /// Public interface impl Repository for LayeredRepository { - fn get_timeline(&self, timelineid: ZTimelineId) -> Result { - Ok(RepositoryTimeline::from(self.get_or_init_timeline( - timelineid, - &mut self.timelines.lock().unwrap(), - )?)) + fn get_timeline(&self, timelineid: ZTimelineId) -> Option { + let timelines = self.timelines.lock().unwrap(); + self.get_timeline_internal(timelineid, &timelines) + .map(RepositoryTimeline::from) } - fn list_timelines(&self) -> Result> { - Ok(self - .timelines + fn get_timeline_load(&self, timelineid: ZTimelineId) -> Result> { + let mut timelines = self.timelines.lock().unwrap(); + match self.get_timeline_load_internal(timelineid, &mut timelines)? { + Some(local_loaded_timeline) => Ok(local_loaded_timeline as _), + None => anyhow::bail!( + "cannot get local timeline: unknown timeline id: {}", + timelineid + ), + } + } + + fn list_timelines(&self) -> Vec<(ZTimelineId, RepositoryTimeline)> { + self.timelines .lock() .unwrap() - .values() - .map(|timeline_entry| RepositoryTimeline::from(timeline_entry.clone())) - .collect()) + .iter() + .map(|(timeline_id, timeline_entry)| { + ( + *timeline_id, + RepositoryTimeline::from(timeline_entry.clone()), + ) + }) + .collect() } fn create_empty_timeline( @@ -176,10 +195,16 @@ impl Repository for LayeredRepository { self.upload_relishes, ); - let timeline_rc = Arc::new(timeline); - let r = timelines.insert(timelineid, LayeredTimelineEntry::Local(timeline_rc.clone())); - assert!(r.is_none()); - Ok(timeline_rc) + let timeline = Arc::new(timeline); + let r = timelines.insert( + timelineid, + LayeredTimelineEntry::Loaded(Arc::clone(&timeline)), + ); + ensure!( + r.is_none(), + "assertion failure, inserted duplicate timeline" + ); + Ok(timeline) } /// Branch a timeline @@ -190,14 +215,12 @@ impl Repository for LayeredRepository { let _gc_cs = self.gc_cs.lock().unwrap(); let mut timelines = self.timelines.lock().unwrap(); - let src_timeline = match self.get_or_init_timeline(src, &mut timelines)? { - LayeredTimelineEntry::Local(timeline) => timeline, - LayeredTimelineEntry::Remote { .. } => { - bail!("Cannot branch off the timeline {} that's not local", src) - } - }; + let src_timeline = self + .get_timeline_load_internal(src, &mut timelines) + // message about timeline being remote is one .context up in the stack + .context("failed to load timeline for branching")? + .ok_or_else(|| anyhow::anyhow!("unknown timeline id: {}", &src))?; let latest_gc_cutoff_lsn = src_timeline.get_latest_gc_cutoff_lsn(); - src_timeline .check_lsn_is_in_scope(start_lsn, &latest_gc_cutoff_lsn) .context("invalid branch start lsn")?; @@ -232,6 +255,7 @@ impl Repository for LayeredRepository { ); crashsafe_dir::create_dir_all(self.conf.timeline_path(&dst, &self.tenantid))?; Self::save_metadata(self.conf, dst, self.tenantid, &metadata, true)?; + timelines.insert(dst, LayeredTimelineEntry::Unloaded { id: dst, metadata }); info!("branched timeline {} from {} at {}", dst, src, start_lsn); @@ -261,11 +285,19 @@ impl Repository for LayeredRepository { fn checkpoint_iteration(&self, cconf: CheckpointConfig) -> Result<()> { // Scan through the hashmap and collect a list of all the timelines, // while holding the lock. Then drop the lock and actually perform the - // checkpoints. We don't want to block everything else while the + // checkpoints. We don't want to block everything else while the // checkpoint runs. let timelines = self.timelines.lock().unwrap(); let timelines_to_checkpoint = timelines .iter() + // filter to get only loaded timelines + .filter_map(|(timelineid, entry)| match entry { + LayeredTimelineEntry::Loaded(timeline) => Some((timelineid, timeline)), + LayeredTimelineEntry::Unloaded { .. } => { + debug!("Skipping checkpoint for unloaded timeline {}", timelineid); + None + } + }) .map(|(timelineid, timeline)| (*timelineid, timeline.clone())) .collect::>(); drop(timelines); @@ -273,13 +305,7 @@ impl Repository for LayeredRepository { for (timelineid, timeline) in &timelines_to_checkpoint { let _entered = info_span!("checkpoint", timeline = %timelineid, tenant = %self.tenantid).entered(); - match timeline { - LayeredTimelineEntry::Local(timeline) => timeline.checkpoint(cconf)?, - LayeredTimelineEntry::Remote { .. } => debug!( - "Cannot run the checkpoint for remote timeline {}", - timelineid - ), - } + timeline.checkpoint(cconf)?; } Ok(()) @@ -288,32 +314,10 @@ impl Repository for LayeredRepository { // Detaches the timeline from the repository. fn detach_timeline(&self, timeline_id: ZTimelineId) -> Result<()> { let mut timelines = self.timelines.lock().unwrap(); - match timelines.entry(timeline_id) { - Entry::Vacant(_) => { - bail!("cannot detach non existing timeline"); - } - Entry::Occupied(mut entry) => { - let timeline_entry = entry.get_mut(); + if timelines.remove(&timeline_id).is_none() { + bail!("cannot detach timeline that is not available locally"); + } - let timeline = match timeline_entry { - LayeredTimelineEntry::Remote { .. } => { - bail!("cannot detach remote timeline {}", timeline_id); - } - LayeredTimelineEntry::Local(timeline) => timeline, - }; - - // TODO (rodionov) keep local state in timeline itself (refactoring related to https://github.com/zenithdb/zenith/issues/997 and #1104) - - // FIXME this is local disk consistent lsn, need to keep the latest succesfully uploaded checkpoint lsn in timeline (metadata?) - // https://github.com/zenithdb/zenith/issues/1104 - let remote_disk_consistent_lsn = timeline.disk_consistent_lsn.load(); - // reference to timeline is dropped here - entry.insert(LayeredTimelineEntry::Remote { - id: timeline_id, - disk_consistent_lsn: remote_disk_consistent_lsn, - }); - } - }; // Release the lock to shutdown and remove the files without holding it drop(timelines); // shutdown the timeline (this shuts down the walreceiver) @@ -324,158 +328,142 @@ impl Repository for LayeredRepository { Ok(()) } - // TODO this method currentlly does not do anything to prevent (or react to) state updates between a sync task schedule and a sync task end (that causes this update). - // Sync task is enqueued and can error and be rescheduled, so some significant time may pass between the events. - // - /// Reacts on the timeline sync state change, changing pageserver's memory state for this timeline (unload or load of the timeline files). - fn set_timeline_state( + fn apply_timeline_remote_sync_status_update( &self, timeline_id: ZTimelineId, - new_state: TimelineSyncState, + timeline_sync_status_update: TimelineSyncStatusUpdate, ) -> Result<()> { debug!( - "set_timeline_state: timeline_id: {}, new_state: {:?}", - timeline_id, new_state + "apply_timeline_remote_sync_status_update timeline_id: {} update: {:?}", + timeline_id, timeline_sync_status_update ); - let mut timelines_accessor = self.timelines.lock().unwrap(); - - match new_state { - TimelineSyncState::Ready(_) => { - let reloaded_timeline = - self.init_local_timeline(timeline_id, &mut timelines_accessor)?; - timelines_accessor - .insert(timeline_id, LayeredTimelineEntry::Local(reloaded_timeline)); - None + match timeline_sync_status_update { + TimelineSyncStatusUpdate::Uploaded => { /* nothing to do, remote consistent lsn is managed by the remote storage */ } - TimelineSyncState::Evicted(_) => timelines_accessor.remove(&timeline_id), - TimelineSyncState::AwaitsDownload(disk_consistent_lsn) - | TimelineSyncState::CloudOnly(disk_consistent_lsn) => timelines_accessor.insert( - timeline_id, - LayeredTimelineEntry::Remote { - id: timeline_id, - disk_consistent_lsn, - }, - ), - }; - // NOTE we do not delete local data in case timeline became cloud only, this is performed in detach_timeline - drop(timelines_accessor); - + TimelineSyncStatusUpdate::Downloaded => { + match self.timelines.lock().unwrap().entry(timeline_id) { + Entry::Occupied(_) => bail!("We completed a download for a timeline that already exists in repository. This is a bug."), + Entry::Vacant(entry) => { + // we need to get metadata of a timeline, another option is to pass it along with Downloaded status + let metadata = Self::load_metadata(self.conf, timeline_id, self.tenantid).context("failed to load local metadata")?; + // finally we make newly downloaded timeline visible to repository + entry.insert(LayeredTimelineEntry::Unloaded { id: timeline_id, metadata, }) + }, + }; + } + } Ok(()) } - /// Layered repo does not store anything but - /// * local, fully loaded timelines, ready for usage - /// * remote timelines, that need a download task scheduled first before they can be used - /// - /// [`TimelineSyncState::Evicted`] and other non-local and non-remote states are not stored in the layered repo at all, - /// hence their statuses cannot be returned by the repo. - fn get_timeline_state(&self, timeline_id: ZTimelineId) -> Option { - let timelines_accessor = self.timelines.lock().unwrap(); - let timeline_entry = timelines_accessor.get(&timeline_id)?; - Some( - if timeline_entry - .local_or_schedule_download(self.tenantid) - .is_some() - { - TimelineSyncState::Ready(timeline_entry.disk_consistent_lsn()) - } else { - TimelineSyncState::CloudOnly(timeline_entry.disk_consistent_lsn()) - }, - ) + fn get_remote_index(&self) -> &tokio::sync::RwLock { + self.remote_index.as_ref() } } #[derive(Clone)] enum LayeredTimelineEntry { - Local(Arc), - Remote { + Loaded(Arc), + Unloaded { id: ZTimelineId, - /// metadata contents of the latest successfully uploaded checkpoint - disk_consistent_lsn: Lsn, + metadata: TimelineMetadata, }, } impl LayeredTimelineEntry { fn timeline_id(&self) -> ZTimelineId { match self { - LayeredTimelineEntry::Local(timeline) => timeline.timelineid, - LayeredTimelineEntry::Remote { id, .. } => *id, + LayeredTimelineEntry::Loaded(timeline) => timeline.timelineid, + LayeredTimelineEntry::Unloaded { id, .. } => *id, } } - /// Gets local timeline data, if it's present. Otherwise schedules a download fot the remote timeline and returns `None`. - fn local_or_schedule_download(&self, tenant_id: ZTenantId) -> Option<&LayeredTimeline> { + fn ancestor_timeline_id(&self) -> Option { match self { - Self::Local(local) => Some(local.as_ref()), - Self::Remote { - id: timeline_id, .. - } => { - debug!( - "Accessed a remote timeline {} for tenant {}, scheduling a timeline download", - timeline_id, tenant_id - ); - schedule_timeline_download(tenant_id, *timeline_id); - None + LayeredTimelineEntry::Loaded(timeline) => { + timeline.ancestor_timeline.as_ref().map(|t| t.timeline_id()) } + LayeredTimelineEntry::Unloaded { metadata, .. } => metadata.ancestor_timeline(), } } - /// Gets a current (latest for the remote case) disk consistent Lsn for the timeline. - fn disk_consistent_lsn(&self) -> Lsn { + fn ancestor_lsn(&self) -> Lsn { match self { - Self::Local(local) => local.disk_consistent_lsn.load(), - Self::Remote { - disk_consistent_lsn, - .. - } => *disk_consistent_lsn, + LayeredTimelineEntry::Loaded(timeline) => timeline.ancestor_lsn, + LayeredTimelineEntry::Unloaded { metadata, .. } => metadata.ancestor_lsn(), + } + } + + fn ensure_loaded(&self) -> anyhow::Result<&Arc> { + match self { + LayeredTimelineEntry::Loaded(timeline) => Ok(timeline), + LayeredTimelineEntry::Unloaded { .. } => { + anyhow::bail!("timeline is unloaded") + } } } } impl From for RepositoryTimeline { - fn from(layered_timeline: LayeredTimelineEntry) -> Self { - match layered_timeline { - LayeredTimelineEntry::Local(timeline) => RepositoryTimeline::Local { - id: timeline.timelineid, - timeline, - }, - LayeredTimelineEntry::Remote { - id, - disk_consistent_lsn, - } => RepositoryTimeline::Remote { - id, - disk_consistent_lsn, - }, + fn from(entry: LayeredTimelineEntry) -> Self { + match entry { + LayeredTimelineEntry::Loaded(timeline) => RepositoryTimeline::Loaded(timeline as _), + LayeredTimelineEntry::Unloaded { metadata, .. } => { + RepositoryTimeline::Unloaded { metadata } + } } } } /// Private functions impl LayeredRepository { - // Implementation of the public `get_timeline` function. This differs from the public - // interface in that the caller must already hold the mutex on the 'timelines' hashmap. - fn get_or_init_timeline( + // Implementation of the public `get_timeline` function. + // Differences from the public: + // * interface in that the caller must already hold the mutex on the 'timelines' hashmap. + fn get_timeline_internal( + &self, + timelineid: ZTimelineId, + timelines: &HashMap, + ) -> Option { + timelines.get(&timelineid).cloned() + } + + // Implementation of the public `get_timeline_load` function. + // Differences from the public: + // * interface in that the caller must already hold the mutex on the 'timelines' hashmap. + fn get_timeline_load_internal( &self, timelineid: ZTimelineId, timelines: &mut HashMap, - ) -> Result { + ) -> anyhow::Result>> { match timelines.get(&timelineid) { - Some(timeline_entry) => { - let _ = timeline_entry.local_or_schedule_download(self.tenantid); - Ok(timeline_entry.clone()) - } + Some(entry) => match entry { + LayeredTimelineEntry::Loaded(local_timeline) => { + trace!("timeline {} found loaded", &timelineid); + return Ok(Some(Arc::clone(local_timeline))); + } + LayeredTimelineEntry::Unloaded { .. } => { + trace!("timeline {} found unloaded", &timelineid) + } + }, None => { - let timeline = self.init_local_timeline(timelineid, timelines)?; - timelines.insert( - timelineid, - LayeredTimelineEntry::Local(Arc::clone(&timeline)), - ); - Ok(LayeredTimelineEntry::Local(timeline)) + trace!("timeline {} not found", &timelineid); + return Ok(None); } - } + }; + let timeline = self.load_local_timeline(timelineid, timelines)?; + let was_loaded = timelines.insert( + timelineid, + LayeredTimelineEntry::Loaded(Arc::clone(&timeline)), + ); + ensure!( + was_loaded.is_none() + || matches!(was_loaded, Some(LayeredTimelineEntry::Unloaded { .. })), + "assertion failure, inserted wrong timeline in an incorrect state" + ); + Ok(Some(timeline)) } - fn init_local_timeline( + fn load_local_timeline( &self, timelineid: ZTimelineId, timelines: &mut HashMap, @@ -486,8 +474,18 @@ impl LayeredRepository { let ancestor = metadata .ancestor_timeline() - .map(|ancestor_timelineid| self.get_or_init_timeline(ancestor_timelineid, timelines)) - .transpose()?; + .map(|ancestor_timeline_id| { + trace!( + "loading {}'s ancestor {}", + timelineid, + &ancestor_timeline_id + ); + self.get_timeline_load_internal(ancestor_timeline_id, timelines) + }) + .transpose() + .context("cannot load ancestor timeline")? + .flatten() + .map(LayeredTimelineEntry::Loaded); let _enter = info_span!("loading timeline", timeline = %timelineid, tenant = %self.tenantid) .entered(); @@ -513,6 +511,7 @@ impl LayeredRepository { conf: &'static PageServerConf, walredo_mgr: Arc, tenantid: ZTenantId, + remote_index: Arc>, upload_relishes: bool, ) -> LayeredRepository { LayeredRepository { @@ -521,6 +520,7 @@ impl LayeredRepository { timelines: Mutex::new(HashMap::new()), gc_cs: Mutex::new(()), walredo_mgr, + remote_index, upload_relishes, } } @@ -608,86 +608,46 @@ impl LayeredRepository { // grab mutex to prevent new timelines from being created here. let _gc_cs = self.gc_cs.lock().unwrap(); - let mut timelines = self.timelines.lock().unwrap(); - // Scan all timelines. For each timeline, remember the timeline ID and // the branch point where it was created. - // - let mut timelineids: Vec = Vec::new(); - - // We scan the directory, not the in-memory hash table, because the hash - // table only contains entries for timelines that have been accessed. We - // need to take all timelines into account, not only the active ones. - let timelines_path = self.conf.timelines_path(&self.tenantid); - - for direntry in fs::read_dir(timelines_path)? { - let direntry = direntry?; - if let Some(fname) = direntry.file_name().to_str() { - if let Ok(timelineid) = fname.parse::() { - timelineids.push(timelineid); - } - } - } - - // Now collect info about branchpoints let mut all_branchpoints: BTreeSet<(ZTimelineId, Lsn)> = BTreeSet::new(); - for &timelineid in &timelineids { - let timeline = match self.get_or_init_timeline(timelineid, &mut timelines)? { - LayeredTimelineEntry::Local(timeline) => timeline, - LayeredTimelineEntry::Remote { .. } => { - warn!( - "Timeline {} is not local, cannot proceed with gc", - timelineid - ); - return Ok(totals); - } - }; + let mut timeline_ids = Vec::new(); + let mut timelines = self.timelines.lock().unwrap(); - if let Some(ancestor_timeline) = &timeline.ancestor_timeline { - let ancestor_timeline = - match ancestor_timeline.local_or_schedule_download(self.tenantid) { - Some(timeline) => timeline, - None => { - warn!( - "Timeline {} has ancestor {} is not local, cannot proceed with gc", - timelineid, - ancestor_timeline.timeline_id() - ); - return Ok(totals); - } - }; + for (timeline_id, timeline_entry) in timelines.iter() { + timeline_ids.push(*timeline_id); + + // This is unresolved question for now, how to do gc in presense of remote timelines + // especially when this is combined with branching. + // Somewhat related: https://github.com/zenithdb/zenith/issues/999 + if let Some(ancestor_timeline_id) = &timeline_entry.ancestor_timeline_id() { // If target_timeline is specified, we only need to know branchpoints of its children if let Some(timelineid) = target_timelineid { - if ancestor_timeline.timelineid == timelineid { + if ancestor_timeline_id == &timelineid { all_branchpoints - .insert((ancestor_timeline.timelineid, timeline.ancestor_lsn)); + .insert((*ancestor_timeline_id, timeline_entry.ancestor_lsn())); } } // Collect branchpoints for all timelines else { - all_branchpoints.insert((ancestor_timeline.timelineid, timeline.ancestor_lsn)); + all_branchpoints.insert((*ancestor_timeline_id, timeline_entry.ancestor_lsn())); } } } // Ok, we now know all the branch points. // Perform GC for each timeline. - for timelineid in timelineids { + for timelineid in timeline_ids.into_iter() { if thread_mgr::is_shutdown_requested() { // We were requested to shut down. Stop and return with the progress we // made. break; } - // We have already loaded all timelines above - // so this operation is just a quick map lookup. - let timeline = match self.get_or_init_timeline(timelineid, &mut *timelines)? { - LayeredTimelineEntry::Local(timeline) => timeline, - LayeredTimelineEntry::Remote { .. } => { - debug!("Skipping GC for non-local timeline {}", timelineid); - continue; - } - }; + // Timeline is known to be local and loaded. + let timeline = self + .get_timeline_load_internal(timelineid, &mut *timelines)? + .expect("checked above that timeline is local and loaded"); // If target_timeline is specified, only GC it if let Some(target_timelineid) = target_timelineid { @@ -989,13 +949,13 @@ impl Timeline for LayeredTimeline { match &timeline.ancestor_timeline { None => break, Some(ancestor_entry) => { - match ancestor_entry.local_or_schedule_download(self.tenantid) { - Some(ancestor) => { - timeline = ancestor; - continue; - } - None => bail!("Cannot list relishes for timeline {} tenant {} due to its ancestor being remote only", self.timelineid, self.tenantid), - } + timeline = ancestor_entry.ensure_loaded().with_context( + || format!( + "cannot list relishes for timeline {} tenant {} due to its ancestor {} being either unloaded", + self.timelineid, self.tenantid, ancestor_entry.timeline_id(), + ) + )?; + continue; } } } @@ -1313,19 +1273,15 @@ impl LayeredTimeline { while lsn < timeline.ancestor_lsn { trace!("going into ancestor {} ", timeline.ancestor_lsn); - timeline = match timeline - .ancestor_timeline - .as_ref() - .and_then(|ancestor_entry| ancestor_entry.local_or_schedule_download(self.tenantid)) - { - Some(timeline) => timeline, - None => { - bail!( - "Cannot get the whole layer for read locked: timeline {} is not present locally", - self.timelineid - ) - } - }; + timeline = timeline + .ancestor_timeline + .as_ref() + .expect("there should be an ancestor") + .ensure_loaded() + .with_context(|| format!( + "Cannot get the whole layer for read locked: timeline {} is not present locally", + self.get_ancestor_timeline_id().unwrap()) + )?; } // Now we have the right starting timeline for our search. @@ -1366,18 +1322,13 @@ impl LayeredTimeline { // If not, check if there's a layer on the ancestor timeline match &timeline.ancestor_timeline { Some(ancestor_entry) => { - match ancestor_entry.local_or_schedule_download(self.tenantid) { - Some(ancestor) => { - lsn = timeline.ancestor_lsn; - timeline = ancestor; - trace!("recursing into ancestor at {}/{}", timeline.timelineid, lsn); - continue; - } - None => bail!( - "Cannot get a layer for read from remote ancestor timeline {}", - self.timelineid - ), - } + let ancestor = ancestor_entry + .ensure_loaded() + .context("cannot get a layer for read from ancestor because it is either remote or unloaded")?; + lsn = timeline.ancestor_lsn; + timeline = ancestor; + trace!("recursing into ancestor at {}/{}", timeline.timelineid, lsn); + continue; } None => return Ok(None), } @@ -1501,7 +1452,6 @@ impl LayeredTimeline { fn checkpoint_internal(&self, checkpoint_distance: u64, reconstruct_pages: bool) -> Result<()> { // Prevent concurrent checkpoints let _checkpoint_cs = self.checkpoint_cs.lock().unwrap(); - let write_guard = self.write_lock.lock().unwrap(); let mut layers = self.layers.lock().unwrap(); @@ -1862,10 +1812,10 @@ impl LayeredTimeline { ); } // Now check ancestor timelines, if any are present locally - else if let Some(ancestor) = - self.ancestor_timeline.as_ref().and_then(|timeline_entry| { - timeline_entry.local_or_schedule_download(self.tenantid) - }) + else if let Some(ancestor) = self + .ancestor_timeline + .as_ref() + .and_then(|timeline_entry| timeline_entry.ensure_loaded().ok()) { let prior_lsn = ancestor.get_last_record_lsn(); if seg.rel.is_blocky() { @@ -2435,9 +2385,8 @@ mod tests { metadata_bytes[512 - 4 - 2] ^= 1; std::fs::write(metadata_path, metadata_bytes)?; - let new_repo = harness.load(); - let err = new_repo.get_timeline(TIMELINE_ID).err().unwrap(); - assert_eq!(err.to_string(), "failed to load metadata"); + let err = harness.try_load().err().expect("should fail"); + assert_eq!(err.to_string(), "failed to load local metadata"); assert_eq!( err.source().unwrap().to_string(), "metadata checksum mismatch" @@ -2527,7 +2476,7 @@ mod tests { // Load the timeline. This will cause the files in the "future" to be renamed // away. let new_repo = harness.load(); - new_repo.get_timeline(TIMELINE_ID).unwrap(); + new_repo.get_timeline_load(TIMELINE_ID).unwrap(); drop(new_repo); for filename in future_filenames.iter() { @@ -2544,7 +2493,7 @@ mod tests { } let new_repo = harness.load(); - new_repo.get_timeline(TIMELINE_ID).unwrap(); + new_repo.get_timeline_load(TIMELINE_ID).unwrap(); drop(new_repo); for filename in future_filenames.iter() { diff --git a/pageserver/src/page_service.rs b/pageserver/src/page_service.rs index 42a099cca5..6e6b6415f3 100644 --- a/pageserver/src/page_service.rs +++ b/pageserver/src/page_service.rs @@ -322,8 +322,8 @@ impl PageServerHandler { let _enter = info_span!("pagestream", timeline = %timelineid, tenant = %tenantid).entered(); // Check that the timeline exists - let timeline = tenant_mgr::get_timeline_for_tenant(tenantid, timelineid) - .context("Cannot handle pagerequests for a remote timeline")?; + let timeline = tenant_mgr::get_timeline_for_tenant_load(tenantid, timelineid) + .context("Cannot load local timeline")?; /* switch client to COPYBOTH */ pgb.write_message(&BeMessage::CopyBothResponse)?; @@ -520,8 +520,8 @@ impl PageServerHandler { let _enter = span.enter(); // check that the timeline exists - let timeline = tenant_mgr::get_timeline_for_tenant(tenantid, timelineid) - .context("Cannot handle basebackup request for a remote timeline")?; + let timeline = tenant_mgr::get_timeline_for_tenant_load(tenantid, timelineid) + .context("Cannot load local timeline")?; let latest_gc_cutoff_lsn = timeline.get_latest_gc_cutoff_lsn(); if let Some(lsn) = lsn { timeline @@ -655,8 +655,8 @@ impl postgres_backend::Handler for PageServerHandler { info_span!("callmemaybe", timeline = %timelineid, tenant = %tenantid).entered(); // Check that the timeline exists - tenant_mgr::get_timeline_for_tenant(tenantid, timelineid) - .context("Failed to fetch local timeline for callmemaybe requests")?; + tenant_mgr::get_timeline_for_tenant_load(tenantid, timelineid) + .context("Cannot load local timeline")?; walreceiver::launch_wal_receiver(self.conf, tenantid, timelineid, &connstr)?; @@ -778,8 +778,8 @@ impl postgres_backend::Handler for PageServerHandler { let tenantid = ZTenantId::from_str(caps.get(1).unwrap().as_str())?; let timelineid = ZTimelineId::from_str(caps.get(2).unwrap().as_str())?; - let timeline = tenant_mgr::get_timeline_for_tenant(tenantid, timelineid) - .context("Failed to fetch local timeline for checkpoint request")?; + let timeline = tenant_mgr::get_timeline_for_tenant_load(tenantid, timelineid) + .context("Cannot load local timeline")?; timeline.checkpoint(CheckpointConfig::Forced)?; pgb.write_message_noflush(&SINGLE_COL_ROWDESC)? diff --git a/pageserver/src/remote_storage.rs b/pageserver/src/remote_storage.rs index 4af1f8ed56..08fb16a679 100644 --- a/pageserver/src/remote_storage.rs +++ b/pageserver/src/remote_storage.rs @@ -89,32 +89,38 @@ use std::{ collections::HashMap, ffi, fs, path::{Path, PathBuf}, + sync::Arc, }; use anyhow::{bail, Context}; -use tokio::io; +use tokio::{io, sync::RwLock}; use tracing::{error, info}; use zenith_utils::zid::{ZTenantId, ZTenantTimelineId, ZTimelineId}; +pub use self::storage_sync::index::{RemoteTimelineIndex, TimelineIndexEntry}; pub use self::storage_sync::{schedule_timeline_checkpoint_upload, schedule_timeline_download}; use self::{local_fs::LocalFs, rust_s3::S3}; use crate::{ config::{PageServerConf, RemoteStorageKind}, layered_repository::metadata::{TimelineMetadata, METADATA_FILE_NAME}, - repository::TimelineSyncState, }; pub use storage_sync::compression; +#[derive(Clone, Copy, Debug)] +pub enum LocalTimelineInitStatus { + LocallyComplete, + NeedsSync, +} + +type LocalTimelineInitStatuses = HashMap>; + /// A structure to combine all synchronization data to share with pageserver after a successful sync loop initialization. /// Successful initialization includes a case when sync loop is not started, in which case the startup data is returned still, /// to simplify the received code. pub struct SyncStartupData { - /// A sync state, derived from initial comparison of local timeline files and the remote archives, - /// before any sync tasks are executed. - /// To reuse the local file scan logic, the timeline states are returned even if no sync loop get started during init: - /// in this case, no remote files exist and all local timelines with correct metadata files are considered ready. - pub initial_timeline_states: HashMap>, + pub remote_index: Arc>, + pub local_timeline_init_statuses: LocalTimelineInitStatuses, } /// Based on the config, initiates the remote storage connection and starts a separate thread @@ -154,23 +160,18 @@ pub fn start_local_timeline_sync( .context("Failed to spawn the storage sync thread"), None => { info!("No remote storage configured, skipping storage sync, considering all local timelines with correct metadata files enabled"); - let mut initial_timeline_states: HashMap< - ZTenantId, - HashMap, - > = HashMap::new(); - for (ZTenantTimelineId{tenant_id, timeline_id}, (timeline_metadata, _)) in + let mut local_timeline_init_statuses = LocalTimelineInitStatuses::new(); + for (ZTenantTimelineId { tenant_id, timeline_id }, _) in local_timeline_files { - initial_timeline_states + local_timeline_init_statuses .entry(tenant_id) .or_default() - .insert( - timeline_id, - TimelineSyncState::Ready(timeline_metadata.disk_consistent_lsn()), - ); + .insert(timeline_id, LocalTimelineInitStatus::LocallyComplete); } Ok(SyncStartupData { - initial_timeline_states, + local_timeline_init_statuses, + remote_index: Arc::new(RwLock::new(RemoteTimelineIndex::empty())), }) } } diff --git a/pageserver/src/remote_storage/storage_sync.rs b/pageserver/src/remote_storage/storage_sync.rs index d14f849e15..f1483375cb 100644 --- a/pageserver/src/remote_storage/storage_sync.rs +++ b/pageserver/src/remote_storage/storage_sync.rs @@ -58,7 +58,7 @@ //! Synchronization never removes any local from pageserver workdir or remote files from the remote storage, yet there could be overwrites of the same files (metadata file updates; future checksum mismatch fixes). //! NOTE: No real contents or checksum check happens right now and is a subject to improve later. //! -//! After the whole timeline is downloaded, [`crate::tenant_mgr::set_timeline_states`] function is used to update pageserver memory stage for the timeline processed. +//! After the whole timeline is downloaded, [`crate::tenant_mgr::apply_timeline_sync_status_updates`] function is used to update pageserver memory stage for the timeline processed. //! //! When pageserver signals shutdown, current sync task gets finished and the loop exists. @@ -93,17 +93,25 @@ use self::{ download::{download_timeline, DownloadedTimeline}, index::{ ArchiveDescription, ArchiveId, RemoteTimeline, RemoteTimelineIndex, TimelineIndexEntry, + TimelineIndexEntryInner, }, upload::upload_timeline_checkpoint, }; -use super::{RemoteStorage, SyncStartupData, ZTenantTimelineId}; +use super::{ + LocalTimelineInitStatus, LocalTimelineInitStatuses, RemoteStorage, SyncStartupData, + ZTenantTimelineId, +}; use crate::{ config::PageServerConf, layered_repository::metadata::TimelineMetadata, - remote_storage::storage_sync::compression::read_archive_header, repository::TimelineSyncState, - tenant_mgr::set_timeline_states, thread_mgr, thread_mgr::ThreadKind, + remote_storage::storage_sync::compression::read_archive_header, + repository::TimelineSyncStatusUpdate, tenant_mgr::apply_timeline_sync_status_updates, + thread_mgr, thread_mgr::ThreadKind, }; -use zenith_metrics::{register_histogram_vec, register_int_gauge, HistogramVec, IntGauge}; +use zenith_metrics::{ + register_histogram_vec, register_int_counter, register_int_gauge, HistogramVec, IntCounter, + IntGauge, +}; use zenith_utils::zid::{ZTenantId, ZTimelineId}; lazy_static! { @@ -112,6 +120,11 @@ lazy_static! { "Number of storage sync items left in the queue" ) .expect("failed to register pageserver remote storage remaining sync items int gauge"); + static ref FATAL_TASK_FAILURES: IntCounter = register_int_counter!( + "pageserver_remote_storage_fatal_task_failures", + "Number of critically failed tasks" + ) + .expect("failed to register pageserver remote storage remaining sync items int gauge"); static ref IMAGE_SYNC_TIME: HistogramVec = register_histogram_vec!( "pageserver_remote_storage_image_sync_time", "Time took to synchronize (download or upload) a whole pageserver image. \ @@ -379,10 +392,13 @@ pub(super) fn spawn_storage_sync_thread< None } }); - let remote_index = RemoteTimelineIndex::try_parse_descriptions_from_paths(conf, download_paths); - - let initial_timeline_states = schedule_first_sync_tasks(&remote_index, local_timeline_files); + let mut remote_index = + RemoteTimelineIndex::try_parse_descriptions_from_paths(conf, download_paths); + let local_timeline_init_statuses = + schedule_first_sync_tasks(&mut remote_index, local_timeline_files); + let remote_index = Arc::new(RwLock::new(remote_index)); + let remote_index_cloned = Arc::clone(&remote_index); thread_mgr::spawn( ThreadKind::StorageSync, None, @@ -393,7 +409,7 @@ pub(super) fn spawn_storage_sync_thread< runtime, conf, receiver, - remote_index, + remote_index_cloned, storage, max_concurrent_sync, max_sync_errors, @@ -402,12 +418,13 @@ pub(super) fn spawn_storage_sync_thread< ) .context("Failed to spawn remote storage sync thread")?; Ok(SyncStartupData { - initial_timeline_states, + remote_index, + local_timeline_init_statuses, }) } enum LoopStep { - NewStates(HashMap>), + SyncStatusUpdates(HashMap>), Shutdown, } @@ -419,13 +436,14 @@ fn storage_sync_loop< runtime: Runtime, conf: &'static PageServerConf, mut receiver: UnboundedReceiver, - index: RemoteTimelineIndex, + index: Arc>, storage: S, max_concurrent_sync: NonZeroUsize, max_sync_errors: NonZeroU32, ) -> anyhow::Result<()> { - let remote_assets = Arc::new((storage, RwLock::new(index))); + let remote_assets = Arc::new((storage, Arc::clone(&index))); loop { + let index = Arc::clone(&index); let loop_step = runtime.block_on(async { tokio::select! { new_timeline_states = loop_step( @@ -435,15 +453,15 @@ fn storage_sync_loop< max_concurrent_sync, max_sync_errors, ) - .instrument(debug_span!("storage_sync_loop_step")) => LoopStep::NewStates(new_timeline_states), + .instrument(debug_span!("storage_sync_loop_step")) => LoopStep::SyncStatusUpdates(new_timeline_states), _ = thread_mgr::shutdown_watcher() => LoopStep::Shutdown, } }); match loop_step { - LoopStep::NewStates(new_timeline_states) => { + LoopStep::SyncStatusUpdates(new_timeline_states) => { // Batch timeline download registration to ensure that the external registration code won't block any running tasks before. - set_timeline_states(conf, new_timeline_states); + apply_timeline_sync_status_updates(conf, index, new_timeline_states); debug!("Sync loop step completed"); } LoopStep::Shutdown => { @@ -462,10 +480,10 @@ async fn loop_step< >( conf: &'static PageServerConf, receiver: &mut UnboundedReceiver, - remote_assets: Arc<(S, RwLock)>, + remote_assets: Arc<(S, Arc>)>, max_concurrent_sync: NonZeroUsize, max_sync_errors: NonZeroU32, -) -> HashMap> { +) -> HashMap> { let max_concurrent_sync = max_concurrent_sync.get(); let mut next_tasks = BTreeSet::new(); @@ -516,8 +534,10 @@ async fn loop_step< }) .collect::>(); - let mut new_timeline_states: HashMap> = - HashMap::with_capacity(max_concurrent_sync); + let mut new_timeline_states: HashMap< + ZTenantId, + HashMap, + > = HashMap::with_capacity(max_concurrent_sync); while let Some((sync_id, state_update)) = task_batch.next().await { debug!("Finished storage sync task for sync id {}", sync_id); if let Some(state_update) = state_update { @@ -540,24 +560,19 @@ async fn process_task< S: RemoteStorage + Send + Sync + 'static, >( conf: &'static PageServerConf, - remote_assets: Arc<(S, RwLock)>, + remote_assets: Arc<(S, Arc>)>, task: SyncTask, max_sync_errors: NonZeroU32, -) -> Option { +) -> Option { if task.retries > max_sync_errors.get() { error!( "Evicting task {:?} that failed {} times, exceeding the error threshold", task.kind, task.retries ); - return Some(TimelineSyncState::Evicted( - remote_assets - .as_ref() - .1 - .read() - .await - .timeline_entry(&task.sync_id) - .and_then(TimelineIndexEntry::disk_consistent_lsn), - )); + FATAL_TASK_FAILURES.inc(); + // FIXME (rodionov) this can potentially leave holes in timeline uploads + // planneed to be fixed as part of https://github.com/zenithdb/zenith/issues/977 + return None; } if task.retries > 0 { @@ -569,6 +584,8 @@ async fn process_task< tokio::time::sleep(Duration::from_secs_f64(seconds_to_wait)).await; } + let remote_index = Arc::clone(&remote_assets.1); + let sync_start = Instant::now(); let sync_name = task.kind.sync_name(); match task.kind { @@ -585,19 +602,25 @@ async fn process_task< match download_result { DownloadedTimeline::Abort => { register_sync_status(sync_start, sync_name, None); + remote_index + .write() + .await + .set_awaits_download(&task.sync_id, false) + .expect("timeline should be present in remote index"); None } - DownloadedTimeline::FailedAndRescheduled { - disk_consistent_lsn, - } => { + DownloadedTimeline::FailedAndRescheduled => { register_sync_status(sync_start, sync_name, Some(false)); - Some(TimelineSyncState::AwaitsDownload(disk_consistent_lsn)) + None } - DownloadedTimeline::Successful { - disk_consistent_lsn, - } => { + DownloadedTimeline::Successful => { register_sync_status(sync_start, sync_name, Some(true)); - Some(TimelineSyncState::Ready(disk_consistent_lsn)) + remote_index + .write() + .await + .set_awaits_download(&task.sync_id, false) + .expect("timeline should be present in remote index"); + Some(TimelineSyncStatusUpdate::Downloaded) } } } @@ -617,45 +640,45 @@ async fn process_task< } fn schedule_first_sync_tasks( - index: &RemoteTimelineIndex, + index: &mut RemoteTimelineIndex, local_timeline_files: HashMap)>, -) -> HashMap> { - let mut initial_timeline_statuses: HashMap> = - HashMap::new(); +) -> LocalTimelineInitStatuses { + let mut local_timeline_init_statuses = LocalTimelineInitStatuses::new(); let mut new_sync_tasks = VecDeque::with_capacity(local_timeline_files.len().max(local_timeline_files.len())); for (sync_id, (local_metadata, local_files)) in local_timeline_files { - let local_disk_consistent_lsn = local_metadata.disk_consistent_lsn(); - let ZTenantTimelineId { tenant_id, timeline_id, } = sync_id; - match index.timeline_entry(&sync_id) { + match index.timeline_entry_mut(&sync_id) { Some(index_entry) => { - let timeline_status = compare_local_and_remote_timeline( + let (timeline_status, awaits_download) = compare_local_and_remote_timeline( &mut new_sync_tasks, sync_id, local_metadata, local_files, index_entry, ); - match timeline_status { - Some(timeline_status) => { - initial_timeline_statuses - .entry(tenant_id) - .or_default() - .insert(timeline_id, timeline_status); - } - None => error!( - "Failed to compare local and remote timeline for task {}", - sync_id - ), + let was_there = local_timeline_init_statuses + .entry(tenant_id) + .or_default() + .insert(timeline_id, timeline_status); + + if was_there.is_some() { + // defensive check + warn!( + "Overwriting timeline init sync status. Status {:?} Timeline {}", + timeline_status, timeline_id + ); } + index_entry.set_awaits_download(awaits_download); } None => { + // TODO (rodionov) does this mean that we've crashed during tenant creation? + // is it safe to upload this checkpoint? could it be half broken? new_sync_tasks.push_back(SyncTask::new( sync_id, 0, @@ -664,56 +687,18 @@ fn schedule_first_sync_tasks( metadata: local_metadata, }), )); - initial_timeline_statuses + local_timeline_init_statuses .entry(tenant_id) .or_default() - .insert( - timeline_id, - TimelineSyncState::Ready(local_disk_consistent_lsn), - ); + .insert(timeline_id, LocalTimelineInitStatus::LocallyComplete); } } } - let unprocessed_remote_ids = |remote_id: &ZTenantTimelineId| { - initial_timeline_statuses - .get(&remote_id.tenant_id) - .and_then(|timelines| timelines.get(&remote_id.timeline_id)) - .is_none() - }; - for unprocessed_remote_id in index - .all_sync_ids() - .filter(unprocessed_remote_ids) - .collect::>() - { - let ZTenantTimelineId { - tenant_id: cloud_only_tenant_id, - timeline_id: cloud_only_timeline_id, - } = unprocessed_remote_id; - match index - .timeline_entry(&unprocessed_remote_id) - .and_then(TimelineIndexEntry::disk_consistent_lsn) - { - Some(remote_disk_consistent_lsn) => { - initial_timeline_statuses - .entry(cloud_only_tenant_id) - .or_default() - .insert( - cloud_only_timeline_id, - TimelineSyncState::CloudOnly(remote_disk_consistent_lsn), - ); - } - None => error!( - "Failed to find disk consistent LSN for remote timeline {}", - unprocessed_remote_id - ), - } - } - new_sync_tasks.into_iter().for_each(|task| { sync_queue::push(task); }); - initial_timeline_statuses + local_timeline_init_statuses } fn compare_local_and_remote_timeline( @@ -722,10 +707,21 @@ fn compare_local_and_remote_timeline( local_metadata: TimelineMetadata, local_files: Vec, remote_entry: &TimelineIndexEntry, -) -> Option { +) -> (LocalTimelineInitStatus, bool) { let local_lsn = local_metadata.disk_consistent_lsn(); let uploads = remote_entry.uploaded_checkpoints(); + let mut initial_timeline_status = LocalTimelineInitStatus::LocallyComplete; + + let mut awaits_download = false; + // TODO probably here we need more sophisticated logic, + // if more data is available remotely can we just download whats there? + // without trying to upload something. It may be tricky, needs further investigation. + // For now looks strange that we can request upload + // and dowload for the same timeline simultaneously. + // (upload needs to be only for previously unsynced files, not whole timeline dir). + // If one of the tasks fails they will be reordered in the queue which can lead + // to timeline being stuck in evicted state if !uploads.contains(&local_lsn) { new_sync_tasks.push_back(SyncTask::new( sync_id, @@ -735,6 +731,7 @@ fn compare_local_and_remote_timeline( metadata: local_metadata, }), )); + // Note that status here doesnt change. } let uploads_count = uploads.len(); @@ -743,7 +740,7 @@ fn compare_local_and_remote_timeline( .filter(|upload_lsn| upload_lsn <= &local_lsn) .map(ArchiveId) .collect(); - Some(if archives_to_skip.len() != uploads_count { + if archives_to_skip.len() != uploads_count { new_sync_tasks.push_back(SyncTask::new( sync_id, 0, @@ -752,10 +749,12 @@ fn compare_local_and_remote_timeline( archives_to_skip, }), )); - TimelineSyncState::AwaitsDownload(remote_entry.disk_consistent_lsn()?) - } else { - TimelineSyncState::Ready(remote_entry.disk_consistent_lsn().unwrap_or(local_lsn)) - }) + initial_timeline_status = LocalTimelineInitStatus::NeedsSync; + awaits_download = true; + // we do not need to manupulate with remote consistent lsn here + // because it will be updated when sync will be completed + } + (initial_timeline_status, awaits_download) } fn register_sync_status(sync_start: Instant, sync_name: &str, sync_status: Option) { @@ -769,21 +768,23 @@ fn register_sync_status(sync_start: Instant, sync_name: &str, sync_status: Optio .observe(secs_elapsed) } -async fn update_index_description< +async fn fetch_full_index< P: Send + Sync + 'static, S: RemoteStorage + Send + Sync + 'static, >( - (storage, index): &(S, RwLock), + (storage, index): &(S, Arc>), timeline_dir: &Path, id: ZTenantTimelineId, ) -> anyhow::Result { - let mut index_write = index.write().await; - let full_index = match index_write.timeline_entry(&id) { + let index_read = index.read().await; + let full_index = match index_read.timeline_entry(&id).map(|e| e.inner()) { None => bail!("Timeline not found for sync id {}", id), - Some(TimelineIndexEntry::Full(_)) => bail!("Index is already populated for sync id {}", id), - Some(TimelineIndexEntry::Description(description)) => { + Some(TimelineIndexEntryInner::Full(_)) => { + bail!("Index is already populated for sync id {}", id) + } + Some(TimelineIndexEntryInner::Description(description)) => { let mut archive_header_downloads = FuturesUnordered::new(); - for (&archive_id, description) in description { + for (archive_id, description) in description { archive_header_downloads.push(async move { let header = download_archive_header(storage, timeline_dir, description) .await @@ -795,18 +796,22 @@ async fn update_index_description< let mut full_index = RemoteTimeline::empty(); while let Some(header_data) = archive_header_downloads.next().await { match header_data { - Ok((archive_id, header_size, header)) => full_index.update_archive_contents(archive_id.0, header, header_size), - Err((e, archive_id)) => bail!( - "Failed to download archive header for tenant {}, timeline {}, archive for Lsn {}: {}", - id.tenant_id, id.timeline_id, archive_id.0, - e - ), - } + Ok((archive_id, header_size, header)) => full_index.update_archive_contents(archive_id.0, header, header_size), + Err((e, archive_id)) => bail!( + "Failed to download archive header for tenant {}, timeline {}, archive for Lsn {}: {}", + id.tenant_id, id.timeline_id, archive_id.0, + e + ), + } } full_index } }; - index_write.add_timeline_entry(id, TimelineIndexEntry::Full(full_index.clone())); + drop(index_read); // tokio rw lock is not upgradeable + let mut index_write = index.write().await; + index_write + .upgrade_timeline_entry(&id, full_index.clone()) + .context("cannot upgrade timeline entry in remote index")?; Ok(full_index) } @@ -850,7 +855,7 @@ mod test_utils { #[track_caller] pub async fn ensure_correct_timeline_upload( harness: &RepoHarness, - remote_assets: Arc<(LocalFs, RwLock)>, + remote_assets: Arc<(LocalFs, Arc>)>, timeline_id: ZTimelineId, new_upload: NewCheckpoint, ) { @@ -909,11 +914,14 @@ mod test_utils { } pub async fn expect_timeline( - index: &RwLock, + index: &Arc>, sync_id: ZTenantTimelineId, ) -> RemoteTimeline { - if let Some(TimelineIndexEntry::Full(remote_timeline)) = - index.read().await.timeline_entry(&sync_id) + if let Some(TimelineIndexEntryInner::Full(remote_timeline)) = index + .read() + .await + .timeline_entry(&sync_id) + .map(|e| e.inner()) { remote_timeline.clone() } else { @@ -926,7 +934,7 @@ mod test_utils { #[track_caller] pub async fn assert_index_descriptions( - index: &RwLock, + index: &Arc>, expected_index_with_descriptions: RemoteTimelineIndex, ) { let index_read = index.read().await; @@ -965,26 +973,26 @@ mod test_utils { sync_id ) }); - let expected_timeline_description = match expected_timeline_description { - TimelineIndexEntry::Description(description) => description, - TimelineIndexEntry::Full(_) => panic!("Expected index entry for sync id {} is a full entry, while a description was expected", sync_id), + let expected_timeline_description = match expected_timeline_description.inner() { + TimelineIndexEntryInner::Description(description) => description, + TimelineIndexEntryInner::Full(_) => panic!("Expected index entry for sync id {} is a full entry, while a description was expected", sync_id), }; - match actual_timeline_entry { - TimelineIndexEntry::Description(actual_descriptions) => { + match actual_timeline_entry.inner() { + TimelineIndexEntryInner::Description(description) => { assert_eq!( - actual_descriptions, expected_timeline_description, + description, expected_timeline_description, "Index contains unexpected descriptions entry for sync id {}", sync_id ) } - TimelineIndexEntry::Full(actual_full_entry) => { + TimelineIndexEntryInner::Full(remote_timeline) => { let expected_lsns = expected_timeline_description .values() .map(|description| description.disk_consistent_lsn) .collect::>(); assert_eq!( - actual_full_entry.checkpoints().collect::>(), + remote_timeline.checkpoints().collect::>(), expected_lsns, "Timeline {} should have the same checkpoints uploaded", sync_id, diff --git a/pageserver/src/remote_storage/storage_sync/download.rs b/pageserver/src/remote_storage/storage_sync/download.rs index 00115ba8d5..e5362b2973 100644 --- a/pageserver/src/remote_storage/storage_sync/download.rs +++ b/pageserver/src/remote_storage/storage_sync/download.rs @@ -5,14 +5,14 @@ use std::{borrow::Cow, collections::BTreeSet, path::PathBuf, sync::Arc}; use anyhow::{ensure, Context}; use tokio::{fs, sync::RwLock}; use tracing::{debug, error, trace, warn}; -use zenith_utils::{lsn::Lsn, zid::ZTenantId}; +use zenith_utils::zid::ZTenantId; use crate::{ config::PageServerConf, layered_repository::metadata::{metadata_path, TimelineMetadata}, remote_storage::{ storage_sync::{ - compression, index::TimelineIndexEntry, sync_queue, update_index_description, SyncKind, + compression, fetch_full_index, index::TimelineIndexEntryInner, sync_queue, SyncKind, SyncTask, }, RemoteStorage, ZTenantTimelineId, @@ -30,10 +30,10 @@ pub(super) enum DownloadedTimeline { Abort, /// Remote timeline data is found, its latest checkpoint's metadata contents (disk_consistent_lsn) is known. /// Initial download failed due to some error, the download task is rescheduled for another retry. - FailedAndRescheduled { disk_consistent_lsn: Lsn }, + FailedAndRescheduled, /// Remote timeline data is found, its latest checkpoint's metadata contents (disk_consistent_lsn) is known. /// Initial download successful. - Successful { disk_consistent_lsn: Lsn }, + Successful, } /// Attempts to download and uncompress files from all remote archives for the timeline given. @@ -47,7 +47,7 @@ pub(super) async fn download_timeline< S: RemoteStorage + Send + Sync + 'static, >( conf: &'static PageServerConf, - remote_assets: Arc<(S, RwLock)>, + remote_assets: Arc<(S, Arc>)>, sync_id: ZTenantTimelineId, mut download: TimelineDownload, retries: u32, @@ -58,19 +58,26 @@ pub(super) async fn download_timeline< tenant_id, timeline_id, } = sync_id; - let index_read = remote_assets.1.read().await; + let index = &remote_assets.1; + + let index_read = index.read().await; let remote_timeline = match index_read.timeline_entry(&sync_id) { None => { - error!("Cannot download: no timeline is present in the index for given ids"); + error!("Cannot download: no timeline is present in the index for given id"); return DownloadedTimeline::Abort; } - Some(index_entry) => match index_entry { - TimelineIndexEntry::Full(remote_timeline) => Cow::Borrowed(remote_timeline), - TimelineIndexEntry::Description(_) => { + + Some(index_entry) => match index_entry.inner() { + TimelineIndexEntryInner::Full(remote_timeline) => Cow::Borrowed(remote_timeline), + TimelineIndexEntryInner::Description(_) => { + // we do not check here for awaits_download because it is ok + // to call this function while the download is in progress + // so it is not a concurrent download, it is the same one + let remote_disk_consistent_lsn = index_entry.disk_consistent_lsn(); drop(index_read); debug!("Found timeline description for the given ids, downloading the full index"); - match update_index_description( + match fetch_full_index( remote_assets.as_ref(), &conf.timeline_path(&timeline_id, &tenant_id), sync_id, @@ -80,16 +87,15 @@ pub(super) async fn download_timeline< Ok(remote_timeline) => Cow::Owned(remote_timeline), Err(e) => { error!("Failed to download full timeline index: {:?}", e); + return match remote_disk_consistent_lsn { - Some(disk_consistent_lsn) => { + Some(_) => { sync_queue::push(SyncTask::new( sync_id, retries, SyncKind::Download(download), )); - DownloadedTimeline::FailedAndRescheduled { - disk_consistent_lsn, - } + DownloadedTimeline::FailedAndRescheduled } None => { error!("Cannot download: no disk consistent Lsn is present for the index entry"); @@ -101,12 +107,9 @@ pub(super) async fn download_timeline< } }, }; - let disk_consistent_lsn = match remote_timeline.checkpoints().max() { - Some(lsn) => lsn, - None => { - debug!("Cannot download: no disk consistent Lsn is present for the remote timeline"); - return DownloadedTimeline::Abort; - } + if remote_timeline.checkpoints().max().is_none() { + debug!("Cannot download: no disk consistent Lsn is present for the remote timeline"); + return DownloadedTimeline::Abort; }; debug!("Downloading timeline archives"); @@ -125,7 +128,7 @@ pub(super) async fn download_timeline< conf, sync_id, Arc::clone(&remote_assets), - remote_timeline.as_ref(), + &remote_timeline, archive_id, Arc::clone(&download.files_to_skip), ) @@ -142,9 +145,7 @@ pub(super) async fn download_timeline< retries, SyncKind::Download(download), )); - return DownloadedTimeline::FailedAndRescheduled { - disk_consistent_lsn, - }; + return DownloadedTimeline::FailedAndRescheduled; } Ok(()) => { debug!("Successfully downloaded archive {:?}", archive_id); @@ -154,9 +155,7 @@ pub(super) async fn download_timeline< } debug!("Finished downloading all timeline's archives"); - DownloadedTimeline::Successful { - disk_consistent_lsn, - } + DownloadedTimeline::Successful } async fn try_download_archive< @@ -168,7 +167,7 @@ async fn try_download_archive< tenant_id, timeline_id, }: ZTenantTimelineId, - remote_assets: Arc<(S, RwLock)>, + remote_assets: Arc<(S, Arc>)>, remote_timeline: &RemoteTimeline, archive_id: ArchiveId, files_to_skip: Arc>, @@ -256,13 +255,15 @@ mod tests { let repo_harness = RepoHarness::create("test_download_timeline")?; let sync_id = ZTenantTimelineId::new(repo_harness.tenant_id, TIMELINE_ID); let storage = LocalFs::new(tempdir()?.path().to_owned(), &repo_harness.conf.workdir)?; - let index = RwLock::new(RemoteTimelineIndex::try_parse_descriptions_from_paths( - repo_harness.conf, - storage - .list() - .await? - .into_iter() - .map(|storage_path| storage.local_path(&storage_path).unwrap()), + let index = Arc::new(RwLock::new( + RemoteTimelineIndex::try_parse_descriptions_from_paths( + repo_harness.conf, + storage + .list() + .await? + .into_iter() + .map(|storage_path| storage.local_path(&storage_path).unwrap()), + ), )); let remote_assets = Arc::new((storage, index)); let storage = &remote_assets.0; diff --git a/pageserver/src/remote_storage/storage_sync/index.rs b/pageserver/src/remote_storage/storage_sync/index.rs index 81c99754c9..7d6b4881f7 100644 --- a/pageserver/src/remote_storage/storage_sync/index.rs +++ b/pageserver/src/remote_storage/storage_sync/index.rs @@ -11,7 +11,7 @@ use std::{ use anyhow::{bail, ensure, Context}; use serde::{Deserialize, Serialize}; -use tracing::debug; +use tracing::*; use zenith_utils::{ lsn::Lsn, zid::{ZTenantId, ZTimelineId}, @@ -52,10 +52,16 @@ impl RelativePath { /// Currently, timeline archive files are tracked only. #[derive(Debug, Clone)] pub struct RemoteTimelineIndex { - timeline_files: HashMap, + timeline_entries: HashMap, } impl RemoteTimelineIndex { + pub fn empty() -> Self { + Self { + timeline_entries: HashMap::new(), + } + } + /// Attempts to parse file paths (not checking the file contents) and find files /// that can be tracked wiht the index. /// On parse falures, logs the error and continues, so empty index can be created from not suitable paths. @@ -63,9 +69,7 @@ impl RemoteTimelineIndex { conf: &'static PageServerConf, paths: impl Iterator, ) -> Self { - let mut index = Self { - timeline_files: HashMap::new(), - }; + let mut index = Self::empty(); for path in paths { if let Err(e) = try_parse_index_entry(&mut index, conf, path.as_ref()) { debug!( @@ -79,40 +83,100 @@ impl RemoteTimelineIndex { } pub fn timeline_entry(&self, id: &ZTenantTimelineId) -> Option<&TimelineIndexEntry> { - self.timeline_files.get(id) + self.timeline_entries.get(id) } pub fn timeline_entry_mut( &mut self, id: &ZTenantTimelineId, ) -> Option<&mut TimelineIndexEntry> { - self.timeline_files.get_mut(id) + self.timeline_entries.get_mut(id) } pub fn add_timeline_entry(&mut self, id: ZTenantTimelineId, entry: TimelineIndexEntry) { - self.timeline_files.insert(id, entry); + self.timeline_entries.insert(id, entry); + } + + pub fn upgrade_timeline_entry( + &mut self, + id: &ZTenantTimelineId, + remote_timeline: RemoteTimeline, + ) -> anyhow::Result<()> { + let mut entry = self.timeline_entries.get_mut(id).ok_or(anyhow::anyhow!( + "timeline is unexpectedly missing from remote index" + ))?; + + if !matches!(entry.inner, TimelineIndexEntryInner::Description(_)) { + anyhow::bail!("timeline entry is not a description entry") + }; + + entry.inner = TimelineIndexEntryInner::Full(remote_timeline); + + Ok(()) } pub fn all_sync_ids(&self) -> impl Iterator + '_ { - self.timeline_files.keys().copied() + self.timeline_entries.keys().copied() + } + + pub fn set_awaits_download( + &mut self, + id: &ZTenantTimelineId, + awaits_download: bool, + ) -> anyhow::Result<()> { + self.timeline_entry_mut(id) + .ok_or_else(|| anyhow::anyhow!("unknown timeline sync {}", id))? + .set_awaits_download(awaits_download); + Ok(()) } } +#[derive(Debug, Clone, PartialEq, Eq, Default)] +pub struct DescriptionTimelineIndexEntry { + pub description: BTreeMap, + pub awaits_download: bool, +} + #[derive(Debug, Clone, PartialEq, Eq)] -pub enum TimelineIndexEntry { - /// An archive found on the remote storage, but not yet downloaded, only a metadata from its storage path is available, without archive contents. +pub struct FullTimelineIndexEntry { + pub remote_timeline: RemoteTimeline, + pub awaits_download: bool, +} + +#[derive(Debug, Clone, PartialEq, Eq)] +pub enum TimelineIndexEntryInner { Description(BTreeMap), - /// Full archive metadata, including the file list, parsed from the archive header. Full(RemoteTimeline), } +#[derive(Debug, Clone, PartialEq, Eq)] +pub struct TimelineIndexEntry { + inner: TimelineIndexEntryInner, + awaits_download: bool, +} + impl TimelineIndexEntry { + pub fn new(inner: TimelineIndexEntryInner, awaits_download: bool) -> Self { + Self { + inner, + awaits_download, + } + } + + pub fn inner(&self) -> &TimelineIndexEntryInner { + &self.inner + } + + pub fn inner_mut(&mut self) -> &mut TimelineIndexEntryInner { + &mut self.inner + } + pub fn uploaded_checkpoints(&self) -> BTreeSet { - match self { - Self::Description(description) => { + match &self.inner { + TimelineIndexEntryInner::Description(description) => { description.keys().map(|archive_id| archive_id.0).collect() } - Self::Full(remote_timeline) => remote_timeline + TimelineIndexEntryInner::Full(remote_timeline) => remote_timeline .checkpoint_archives .keys() .map(|archive_id| archive_id.0) @@ -122,17 +186,25 @@ impl TimelineIndexEntry { /// Gets latest uploaded checkpoint's disk consisten Lsn for the corresponding timeline. pub fn disk_consistent_lsn(&self) -> Option { - match self { - Self::Description(description) => { + match &self.inner { + TimelineIndexEntryInner::Description(description) => { description.keys().map(|archive_id| archive_id.0).max() } - Self::Full(remote_timeline) => remote_timeline + TimelineIndexEntryInner::Full(remote_timeline) => remote_timeline .checkpoint_archives .keys() .map(|archive_id| archive_id.0) .max(), } } + + pub fn get_awaits_download(&self) -> bool { + self.awaits_download + } + + pub fn set_awaits_download(&mut self, awaits_download: bool) { + self.awaits_download = awaits_download; + } } /// Checkpoint archive's id, corresponding to the `disk_consistent_lsn` from the timeline's metadata file during checkpointing. @@ -331,13 +403,15 @@ fn try_parse_index_entry( tenant_id, timeline_id, }; - let timeline_index_entry = index - .timeline_files - .entry(sync_id) - .or_insert_with(|| TimelineIndexEntry::Description(BTreeMap::new())); - match timeline_index_entry { - TimelineIndexEntry::Description(descriptions) => { - descriptions.insert( + let timeline_index_entry = index.timeline_entries.entry(sync_id).or_insert_with(|| { + TimelineIndexEntry::new( + TimelineIndexEntryInner::Description(BTreeMap::default()), + false, + ) + }); + match timeline_index_entry.inner_mut() { + TimelineIndexEntryInner::Description(description) => { + description.insert( ArchiveId(disk_consistent_lsn), ArchiveDescription { header_size, @@ -346,7 +420,7 @@ fn try_parse_index_entry( }, ); } - TimelineIndexEntry::Full(_) => { + TimelineIndexEntryInner::Full(_) => { bail!("Cannot add parsed archive description to its full context in index with sync id {}", sync_id) } } diff --git a/pageserver/src/remote_storage/storage_sync/upload.rs b/pageserver/src/remote_storage/storage_sync/upload.rs index d064039ecc..8fdd91dd18 100644 --- a/pageserver/src/remote_storage/storage_sync/upload.rs +++ b/pageserver/src/remote_storage/storage_sync/upload.rs @@ -10,9 +10,9 @@ use crate::{ config::PageServerConf, remote_storage::{ storage_sync::{ - compression, - index::{RemoteTimeline, TimelineIndexEntry}, - sync_queue, update_index_description, SyncKind, SyncTask, + compression, fetch_full_index, + index::{RemoteTimeline, TimelineIndexEntry, TimelineIndexEntryInner}, + sync_queue, SyncKind, SyncTask, }, RemoteStorage, ZTenantTimelineId, }, @@ -30,7 +30,7 @@ pub(super) async fn upload_timeline_checkpoint< S: RemoteStorage + Send + Sync + 'static, >( config: &'static PageServerConf, - remote_assets: Arc<(S, RwLock)>, + remote_assets: Arc<(S, Arc>)>, sync_id: ZTenantTimelineId, new_checkpoint: NewCheckpoint, retries: u32, @@ -49,22 +49,24 @@ pub(super) async fn upload_timeline_checkpoint< let index_read = index.read().await; let remote_timeline = match index_read.timeline_entry(&sync_id) { None => None, - Some(TimelineIndexEntry::Full(remote_timeline)) => Some(Cow::Borrowed(remote_timeline)), - Some(TimelineIndexEntry::Description(_)) => { - debug!("Found timeline description for the given ids, downloading the full index"); - match update_index_description(remote_assets.as_ref(), &timeline_dir, sync_id).await { - Ok(remote_timeline) => Some(Cow::Owned(remote_timeline)), - Err(e) => { - error!("Failed to download full timeline index: {:?}", e); - sync_queue::push(SyncTask::new( - sync_id, - retries, - SyncKind::Upload(new_checkpoint), - )); - return Some(false); + Some(entry) => match entry.inner() { + TimelineIndexEntryInner::Full(remote_timeline) => Some(Cow::Borrowed(remote_timeline)), + TimelineIndexEntryInner::Description(_) => { + debug!("Found timeline description for the given ids, downloading the full index"); + match fetch_full_index(remote_assets.as_ref(), &timeline_dir, sync_id).await { + Ok(remote_timeline) => Some(Cow::Owned(remote_timeline)), + Err(e) => { + error!("Failed to download full timeline index: {:?}", e); + sync_queue::push(SyncTask::new( + sync_id, + retries, + SyncKind::Upload(new_checkpoint), + )); + return Some(false); + } } } - } + }, }; let already_contains_upload_lsn = remote_timeline @@ -95,22 +97,40 @@ pub(super) async fn upload_timeline_checkpoint< { Ok((archive_header, header_size)) => { let mut index_write = index.write().await; - match index_write.timeline_entry_mut(&sync_id) { - Some(TimelineIndexEntry::Full(remote_timeline)) => { - remote_timeline.update_archive_contents( - new_checkpoint.metadata.disk_consistent_lsn(), - archive_header, - header_size, - ); - } - None | Some(TimelineIndexEntry::Description(_)) => { + match index_write + .timeline_entry_mut(&sync_id) + .map(|e| e.inner_mut()) + { + None => { let mut new_timeline = RemoteTimeline::empty(); new_timeline.update_archive_contents( new_checkpoint.metadata.disk_consistent_lsn(), archive_header, header_size, ); - index_write.add_timeline_entry(sync_id, TimelineIndexEntry::Full(new_timeline)); + index_write.add_timeline_entry( + sync_id, + TimelineIndexEntry::new(TimelineIndexEntryInner::Full(new_timeline), false), + ) + } + Some(TimelineIndexEntryInner::Full(remote_timeline)) => { + remote_timeline.update_archive_contents( + new_checkpoint.metadata.disk_consistent_lsn(), + archive_header, + header_size, + ); + } + Some(TimelineIndexEntryInner::Description(_)) => { + let mut new_timeline = RemoteTimeline::empty(); + new_timeline.update_archive_contents( + new_checkpoint.metadata.disk_consistent_lsn(), + archive_header, + header_size, + ); + index_write.add_timeline_entry( + sync_id, + TimelineIndexEntry::new(TimelineIndexEntryInner::Full(new_timeline), false), + ) } } debug!("Checkpoint uploaded successfully"); @@ -136,7 +156,7 @@ async fn try_upload_checkpoint< S: RemoteStorage + Send + Sync + 'static, >( config: &'static PageServerConf, - remote_assets: Arc<(S, RwLock)>, + remote_assets: Arc<(S, Arc>)>, sync_id: ZTenantTimelineId, new_checkpoint: &NewCheckpoint, files_to_skip: BTreeSet, @@ -209,13 +229,15 @@ mod tests { let repo_harness = RepoHarness::create("reupload_timeline")?; let sync_id = ZTenantTimelineId::new(repo_harness.tenant_id, TIMELINE_ID); let storage = LocalFs::new(tempdir()?.path().to_owned(), &repo_harness.conf.workdir)?; - let index = RwLock::new(RemoteTimelineIndex::try_parse_descriptions_from_paths( - repo_harness.conf, - storage - .list() - .await? - .into_iter() - .map(|storage_path| storage.local_path(&storage_path).unwrap()), + let index = Arc::new(RwLock::new( + RemoteTimelineIndex::try_parse_descriptions_from_paths( + repo_harness.conf, + storage + .list() + .await? + .into_iter() + .map(|storage_path| storage.local_path(&storage_path).unwrap()), + ), )); let remote_assets = Arc::new((storage, index)); let index = &remote_assets.1; @@ -405,13 +427,15 @@ mod tests { let repo_harness = RepoHarness::create("reupload_timeline_rejected")?; let sync_id = ZTenantTimelineId::new(repo_harness.tenant_id, TIMELINE_ID); let storage = LocalFs::new(tempdir()?.path().to_owned(), &repo_harness.conf.workdir)?; - let index = RwLock::new(RemoteTimelineIndex::try_parse_descriptions_from_paths( - repo_harness.conf, - storage - .list() - .await? - .into_iter() - .map(|storage_path| storage.local_path(&storage_path).unwrap()), + let index = Arc::new(RwLock::new( + RemoteTimelineIndex::try_parse_descriptions_from_paths( + repo_harness.conf, + storage + .list() + .await? + .into_iter() + .map(|storage_path| storage.local_path(&storage_path).unwrap()), + ), )); let remote_assets = Arc::new((storage, index)); let storage = &remote_assets.0; diff --git a/pageserver/src/repository.rs b/pageserver/src/repository.rs index be937b8d26..e335f42519 100644 --- a/pageserver/src/repository.rs +++ b/pageserver/src/repository.rs @@ -1,4 +1,6 @@ +use crate::layered_repository::metadata::TimelineMetadata; use crate::relish::*; +use crate::remote_storage::RemoteTimelineIndex; use crate::walrecord::MultiXactMember; use crate::CheckpointConfig; use anyhow::Result; @@ -6,6 +8,7 @@ use bytes::Bytes; use postgres_ffi::{MultiXactId, MultiXactOffset, TransactionId}; use serde::{Deserialize, Serialize}; use std::collections::HashSet; +use std::fmt::Display; use std::ops::{AddAssign, Deref}; use std::sync::{Arc, RwLockReadGuard}; use std::time::Duration; @@ -15,30 +18,43 @@ use zenith_utils::zid::ZTimelineId; /// Block number within a relish. This matches PostgreSQL's BlockNumber type. pub type BlockNumber = u32; +#[derive(Clone, Copy, Debug)] +pub enum TimelineSyncStatusUpdate { + Uploaded, + Downloaded, +} + +impl Display for TimelineSyncStatusUpdate { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + let s = match self { + TimelineSyncStatusUpdate::Uploaded => "Uploaded", + TimelineSyncStatusUpdate::Downloaded => "Downloaded", + }; + f.write_str(s) + } +} /// /// A repository corresponds to one .zenith directory. One repository holds multiple /// timelines, forked off from the same initial call to 'initdb'. pub trait Repository: Send + Sync { - fn detach_timeline(&self, timeline_id: ZTimelineId) -> Result<()>; - - /// Updates timeline based on the new sync state, received from the remote storage synchronization. + /// Updates timeline based on the `TimelineSyncStatusUpdate`, received from the remote storage synchronization. /// See [`crate::remote_storage`] for more details about the synchronization. - fn set_timeline_state( + fn apply_timeline_remote_sync_status_update( &self, timeline_id: ZTimelineId, - new_state: TimelineSyncState, + timeline_sync_status_update: TimelineSyncStatusUpdate, ) -> Result<()>; - /// Gets current synchronization state of the timeline. - /// See [`crate::remote_storage`] for more details about the synchronization. - fn get_timeline_state(&self, timeline_id: ZTimelineId) -> Option; - /// Get Timeline handle for given zenith timeline ID. - fn get_timeline(&self, timelineid: ZTimelineId) -> Result; + /// This function is idempotent. It doesnt change internal state in any way. + fn get_timeline(&self, timelineid: ZTimelineId) -> Option; + + /// Get Timeline handle for locally available timeline. Load it into memory if it is not loaded. + fn get_timeline_load(&self, timelineid: ZTimelineId) -> Result>; /// Lists timelines the repository contains. /// Up to repository's implementation to omit certain timelines that ar not considered ready for use. - fn list_timelines(&self) -> Result>; + fn list_timelines(&self) -> Vec<(ZTimelineId, RepositoryTimeline)>; /// Create a new, empty timeline. The caller is responsible for loading data into it /// Initdb lsn is provided for timeline impl to be able to perform checks for some operations against it. @@ -70,72 +86,44 @@ pub trait Repository: Send + Sync { /// perform one checkpoint iteration, flushing in-memory data on disk. /// this function is periodically called by checkponter thread. fn checkpoint_iteration(&self, cconf: CheckpointConfig) -> Result<()>; + + /// detaches locally available timeline by stopping all threads and removing all the data. + fn detach_timeline(&self, timeline_id: ZTimelineId) -> Result<()>; + + // Allows to retrieve remote timeline index from the repo. Used in walreceiver to grab remote consistent lsn. + fn get_remote_index(&self) -> &tokio::sync::RwLock; } /// A timeline, that belongs to the current repository. pub enum RepositoryTimeline { /// Timeline, with its files present locally in pageserver's working directory. /// Loaded into pageserver's memory and ready to be used. - Local { - id: ZTimelineId, - timeline: Arc, - }, - /// Timeline, found on the pageserver's remote storage, but not yet downloaded locally. - Remote { - id: ZTimelineId, - /// metadata contents of the latest successfully uploaded checkpoint - disk_consistent_lsn: Lsn, + Loaded(Arc), + + /// All the data is available locally, but not loaded into memory, so loading have to be done before actually using the timeline + Unloaded { + // It is ok to keep metadata here, because it is not changed when timeline is unloaded. + // FIXME can s3 sync actually change it? It can change it when timeline is in awaiting download state. + // but we currently do not download something for the timeline once it is local (even if there are new checkpoints) is it correct? + // also it is not that good to keep TimelineMetadata here, because it is layered repo implementation detail + metadata: TimelineMetadata, }, } -impl RepositoryTimeline { - pub fn local_timeline(&self) -> Option> { - if let Self::Local { timeline, .. } = self { - Some(Arc::clone(timeline)) - } else { - None - } - } - - pub fn id(&self) -> ZTimelineId { - match self { - Self::Local { id, .. } => *id, - Self::Remote { id, .. } => *id, - } - } -} - -/// A state of the timeline synchronization with the remote storage. -/// Contains `disk_consistent_lsn` of the corresponding remote timeline (latest checkpoint's disk_consistent_lsn). #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)] -pub enum TimelineSyncState { - /// No further downloads from the remote storage are needed. - /// The timeline state is up-to-date or ahead of the remote storage one, - /// ready to be used in any pageserver operation. - Ready(Lsn), - /// Timeline is scheduled for downloading, but its current local state is not up to date with the remote storage. - /// The timeline is not ready to be used in any pageserver operations, otherwise it might diverge its local state from the remote version, - /// making it impossible to sync it further. - AwaitsDownload(Lsn), - /// Timeline was not in the pageserver's local working directory, but was found on the remote storage, ready to be downloaded. - /// Cannot be used in any pageserver operations due to complete absence locally. - CloudOnly(Lsn), - /// Timeline was evicted from the pageserver's local working directory due to conflicting remote and local states or too many errors during the synchronization. - /// Such timelines cannot have their state synchronized further and may not have the data about remote timeline's disk_consistent_lsn, since eviction may happen - /// due to errors before the remote timeline contents is known. - Evicted(Option), +pub enum LocalTimelineState { + // timeline is loaded into memory (with layer map and all the bits), + Loaded, + // timeline is on disk locally and ready to be loaded into memory. + Unloaded, } -impl TimelineSyncState { - pub fn remote_disk_consistent_lsn(&self) -> Option { - Some(match self { - TimelineSyncState::Evicted(None) => return None, - TimelineSyncState::Ready(lsn) => lsn, - TimelineSyncState::AwaitsDownload(lsn) => lsn, - TimelineSyncState::CloudOnly(lsn) => lsn, - TimelineSyncState::Evicted(Some(lsn)) => lsn, - }) - .copied() +impl<'a> From<&'a RepositoryTimeline> for LocalTimelineState { + fn from(local_timeline_entry: &'a RepositoryTimeline) -> Self { + match local_timeline_entry { + RepositoryTimeline::Loaded(_) => LocalTimelineState::Loaded, + RepositoryTimeline::Unloaded { .. } => LocalTimelineState::Unloaded, + } } } @@ -362,7 +350,7 @@ pub mod repo_harness { use crate::{ config::PageServerConf, - layered_repository::{LayeredRepository, TIMELINES_SEGMENT_NAME}, + layered_repository::LayeredRepository, walredo::{WalRedoError, WalRedoManager}, }; @@ -395,7 +383,6 @@ pub mod repo_harness { let repo_dir = PageServerConf::test_repo_dir(test_name); let _ = fs::remove_dir_all(&repo_dir); fs::create_dir_all(&repo_dir)?; - fs::create_dir_all(&repo_dir.join(TIMELINES_SEGMENT_NAME))?; let conf = PageServerConf::dummy_conf(repo_dir); // Make a static copy of the config. This can never be free'd, but that's @@ -404,19 +391,45 @@ pub mod repo_harness { let tenant_id = ZTenantId::generate(); fs::create_dir_all(conf.tenant_path(&tenant_id))?; + fs::create_dir_all(conf.timelines_path(&tenant_id))?; Ok(Self { conf, tenant_id }) } pub fn load(&self) -> Box { + self.try_load().expect("failed to load test repo") + } + + pub fn try_load(&self) -> Result> { let walredo_mgr = Arc::new(TestRedoManager); - Box::new(LayeredRepository::new( + let repo = Box::new(LayeredRepository::new( self.conf, walredo_mgr, self.tenant_id, + Arc::new(tokio::sync::RwLock::new(RemoteTimelineIndex::empty())), false, - )) + )); + // populate repo with locally available timelines + for timeline_dir_entry in fs::read_dir(self.conf.timelines_path(&self.tenant_id)) + .expect("should be able to read timelines dir") + { + let timeline_dir_entry = timeline_dir_entry.unwrap(); + let timeline_id: ZTimelineId = timeline_dir_entry + .path() + .file_name() + .unwrap() + .to_string_lossy() + .parse() + .unwrap(); + + repo.apply_timeline_remote_sync_status_update( + timeline_id, + TimelineSyncStatusUpdate::Downloaded, + )?; + } + + Ok(repo) } pub fn timeline_path(&self, timeline_id: &ZTimelineId) -> PathBuf { @@ -835,10 +848,9 @@ mod tests { // Create a branch, check that the relation is visible there repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x30))?; - let newtline = match repo.get_timeline(NEW_TIMELINE_ID)?.local_timeline() { - Some(timeline) => timeline, - None => panic!("Should have a local timeline"), - }; + let newtline = repo + .get_timeline_load(NEW_TIMELINE_ID) + .expect("Should have a local timeline"); let new_writer = newtline.writer(); assert!(newtline @@ -896,10 +908,9 @@ mod tests { // Branch the history, modify relation differently on the new timeline repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x30))?; - let newtline = match repo.get_timeline(NEW_TIMELINE_ID)?.local_timeline() { - Some(timeline) => timeline, - None => panic!("Should have a local timeline"), - }; + let newtline = repo + .get_timeline_load(NEW_TIMELINE_ID) + .expect("Should have a local timeline"); let new_writer = newtline.writer(); new_writer.put_page_image(TESTREL_A, 0, Lsn(0x40), TEST_IMG("bar blk 0 at 4"))?; @@ -1046,11 +1057,9 @@ mod tests { make_some_layers(&tline, Lsn(0x20))?; repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x40))?; - let newtline = match repo.get_timeline(NEW_TIMELINE_ID)?.local_timeline() { - Some(timeline) => timeline, - None => panic!("Should have a local timeline"), - }; - + let newtline = repo + .get_timeline_load(NEW_TIMELINE_ID) + .expect("Should have a local timeline"); // this removes layers before lsn 40 (50 minus 10), so there are two remaining layers, image and delta for 31-50 repo.gc_iteration(Some(TIMELINE_ID), 0x10, false)?; assert!(newtline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x25)).is_ok()); @@ -1067,10 +1076,9 @@ mod tests { make_some_layers(&tline, Lsn(0x20))?; repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x40))?; - let newtline = match repo.get_timeline(NEW_TIMELINE_ID)?.local_timeline() { - Some(timeline) => timeline, - None => panic!("Should have a local timeline"), - }; + let newtline = repo + .get_timeline_load(NEW_TIMELINE_ID) + .expect("Should have a local timeline"); make_some_layers(&newtline, Lsn(0x60))?; @@ -1143,4 +1151,81 @@ mod tests { Ok(()) } + + #[test] + fn timeline_load() -> Result<()> { + const TEST_NAME: &str = "timeline_load"; + let harness = RepoHarness::create(TEST_NAME)?; + { + let repo = harness.load(); + let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0x8000))?; + make_some_layers(&tline, Lsn(0x8000))?; + tline.checkpoint(CheckpointConfig::Forced)?; + } + + let repo = harness.load(); + let tline = repo + .get_timeline(TIMELINE_ID) + .expect("cannot load timeline"); + assert!(matches!(tline, RepositoryTimeline::Unloaded { .. })); + + assert!(repo.get_timeline_load(TIMELINE_ID).is_ok()); + + let tline = repo + .get_timeline(TIMELINE_ID) + .expect("cannot load timeline"); + assert!(matches!(tline, RepositoryTimeline::Loaded(_))); + + Ok(()) + } + + #[test] + fn timeline_load_with_ancestor() -> Result<()> { + const TEST_NAME: &str = "timeline_load"; + let harness = RepoHarness::create(TEST_NAME)?; + // create two timelines + { + let repo = harness.load(); + let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; + + make_some_layers(&tline, Lsn(0x20))?; + tline.checkpoint(CheckpointConfig::Forced)?; + + repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x40))?; + + let newtline = repo + .get_timeline_load(NEW_TIMELINE_ID) + .expect("Should have a local timeline"); + + make_some_layers(&newtline, Lsn(0x60))?; + tline.checkpoint(CheckpointConfig::Forced)?; + } + + // check that both of them are initially unloaded + let repo = harness.load(); + { + let tline = repo.get_timeline(TIMELINE_ID).expect("cannot get timeline"); + assert!(matches!(tline, RepositoryTimeline::Unloaded { .. })); + + let tline = repo + .get_timeline(NEW_TIMELINE_ID) + .expect("cannot get timeline"); + assert!(matches!(tline, RepositoryTimeline::Unloaded { .. })); + } + // load only child timeline + let _ = repo + .get_timeline_load(NEW_TIMELINE_ID) + .expect("cannot load timeline"); + + // check that both, child and ancestor are loaded + let tline = repo + .get_timeline(NEW_TIMELINE_ID) + .expect("cannot get timeline"); + assert!(matches!(tline, RepositoryTimeline::Loaded(_))); + + let tline = repo.get_timeline(TIMELINE_ID).expect("cannot get timeline"); + assert!(matches!(tline, RepositoryTimeline::Loaded(_))); + + Ok(()) + } } diff --git a/pageserver/src/tenant_mgr.rs b/pageserver/src/tenant_mgr.rs index 568088fc1d..8584bdd424 100644 --- a/pageserver/src/tenant_mgr.rs +++ b/pageserver/src/tenant_mgr.rs @@ -3,16 +3,19 @@ use crate::config::PageServerConf; use crate::layered_repository::LayeredRepository; -use crate::repository::{Repository, Timeline, TimelineSyncState}; +use crate::remote_storage::RemoteTimelineIndex; +use crate::repository::{Repository, Timeline, TimelineSyncStatusUpdate}; use crate::thread_mgr; use crate::thread_mgr::ThreadKind; use crate::timelines; +use crate::timelines::CreateRepo; use crate::walredo::PostgresRedoManager; use crate::CheckpointConfig; use anyhow::{Context, Result}; use lazy_static::lazy_static; use log::*; use serde::{Deserialize, Serialize}; +use std::collections::hash_map::Entry; use std::collections::HashMap; use std::fmt; use std::sync::{Arc, Mutex, MutexGuard}; @@ -57,79 +60,67 @@ fn access_tenants() -> MutexGuard<'static, HashMap> { TENANTS.lock().unwrap() } -/// Updates tenants' repositories, changing their timelines state in memory. -pub fn set_timeline_states( +// Sets up wal redo manager and repository for tenant. Reduces code duplocation. +// Used during pageserver startup, or when new tenant is attached to pageserver. +pub fn load_local_repo( conf: &'static PageServerConf, - timeline_states: HashMap>, -) { - if timeline_states.is_empty() { - debug!("no timeline state updates to perform"); - return; - } - - info!("Updating states for {} timelines", timeline_states.len()); - trace!("States: {:?}", timeline_states); - + tenant_id: ZTenantId, + remote_index: &Arc>, +) -> Arc { let mut m = access_tenants(); - for (tenant_id, timeline_states) in timeline_states { - let tenant = m.entry(tenant_id).or_insert_with(|| { - // TODO (rodionov) reuse one of the initialisation routines - // Set up a WAL redo manager, for applying WAL records. - let walredo_mgr = PostgresRedoManager::new(conf, tenant_id); + let tenant = m.entry(tenant_id).or_insert_with(|| { + // Set up a WAL redo manager, for applying WAL records. + let walredo_mgr = PostgresRedoManager::new(conf, tenant_id); - // Set up an object repository, for actual data storage. - let repo: Arc = Arc::new(LayeredRepository::new( - conf, - Arc::new(walredo_mgr), - tenant_id, - conf.remote_storage_config.is_some(), - )); - Tenant { - state: TenantState::Idle, - repo, - } - }); - if let Err(e) = put_timelines_into_tenant(tenant, tenant_id, timeline_states) { - error!( - "Failed to update timeline states for tenant {}: {:?}", - tenant_id, e - ); + // Set up an object repository, for actual data storage. + let repo: Arc = Arc::new(LayeredRepository::new( + conf, + Arc::new(walredo_mgr), + tenant_id, + Arc::clone(remote_index), + conf.remote_storage_config.is_some(), + )); + Tenant { + state: TenantState::Idle, + repo, } - } + }); + Arc::clone(&tenant.repo) } -fn put_timelines_into_tenant( - tenant: &mut Tenant, - tenant_id: ZTenantId, - timeline_states: HashMap, -) -> anyhow::Result<()> { - for (timeline_id, timeline_state) in timeline_states { - // If the timeline is being put into any other state than Ready, - // stop any threads operating on it. - // - // FIXME: This is racy. A page service thread could just get - // handle on the Timeline, before we call set_timeline_state() - if !matches!(timeline_state, TimelineSyncState::Ready(_)) { - thread_mgr::shutdown_threads(None, Some(tenant_id), Some(timeline_id)); - - // Should we run a final checkpoint to flush all the data to - // disk? Doesn't seem necessary; all of the states other than - // Ready imply that the data on local disk is corrupt or incomplete, - // and we don't want to flush that to disk. - } - - tenant - .repo - .set_timeline_state(timeline_id, timeline_state) - .with_context(|| { - format!( - "Failed to update timeline {} state to {:?}", - timeline_id, timeline_state - ) - })?; +/// Updates tenants' repositories, changing their timelines state in memory. +pub fn apply_timeline_sync_status_updates( + conf: &'static PageServerConf, + remote_index: Arc>, + sync_status_updates: HashMap>, +) { + if sync_status_updates.is_empty() { + debug!("no sync status updates to apply"); + return; } + info!( + "Applying sync status updates for {} timelines", + sync_status_updates.len() + ); + trace!("Sync status updates: {:?}", sync_status_updates); - Ok(()) + for (tenant_id, tenant_timelines_sync_status_updates) in sync_status_updates { + let repo = load_local_repo(conf, tenant_id, &remote_index); + + for (timeline_id, timeline_sync_status_update) in tenant_timelines_sync_status_updates { + match repo.apply_timeline_remote_sync_status_update(timeline_id, timeline_sync_status_update) + { + Ok(_) => debug!( + "successfully applied timeline sync status update: {} -> {}", + timeline_id, timeline_sync_status_update + ), + Err(e) => error!( + "Failed to apply timeline sync status update for tenant {}. timeline {} update {} Error: {:#}", + tenant_id, timeline_id, timeline_sync_status_update, e + ), + } + } + } } /// @@ -179,24 +170,30 @@ pub fn shutdown_all_tenants() { pub fn create_tenant_repository( conf: &'static PageServerConf, - new_tenant_id: Option, + tenantid: ZTenantId, + remote_index: Arc>, ) -> Result> { - let new_tenant_id = new_tenant_id.unwrap_or_else(ZTenantId::generate); - let wal_redo_manager = Arc::new(PostgresRedoManager::new(conf, new_tenant_id)); - match timelines::create_repo(conf, new_tenant_id, wal_redo_manager)? { - Some(repo) => { - access_tenants() - .entry(new_tenant_id) - .or_insert_with(|| Tenant { - state: TenantState::Idle, - repo, - }); - Ok(Some(new_tenant_id)) - } - None => { - debug!("repository already exists for tenant {}", new_tenant_id); + match access_tenants().entry(tenantid) { + Entry::Occupied(_) => { + debug!("tenant {} already exists", tenantid); Ok(None) } + Entry::Vacant(v) => { + let wal_redo_manager = Arc::new(PostgresRedoManager::new(conf, tenantid)); + let repo = timelines::create_repo( + conf, + tenantid, + CreateRepo::Real { + wal_redo_manager, + remote_index, + }, + )?; + v.insert(Tenant { + state: TenantState::Idle, + repo, + }); + Ok(Some(tenantid)) + } } } @@ -255,19 +252,19 @@ pub fn get_repository_for_tenant(tenantid: ZTenantId) -> Result Result> { get_repository_for_tenant(tenantid)? - .get_timeline(timelineid)? - .local_timeline() - .with_context(|| format!("cannot fetch timeline {}", timelineid)) + .get_timeline_load(timelineid) + .with_context(|| format!("Timeline {} not found for tenant {}", timelineid, tenantid)) } #[derive(Serialize, Deserialize, Clone)] diff --git a/pageserver/src/timelines.rs b/pageserver/src/timelines.rs index 4de131ef70..9cfc21b413 100644 --- a/pageserver/src/timelines.rs +++ b/pageserver/src/timelines.rs @@ -2,8 +2,9 @@ //! Timeline management code // -use anyhow::{anyhow, bail, Context, Result}; +use anyhow::{bail, Context, Result}; use postgres_ffi::ControlFileData; +use serde::{Deserialize, Serialize}; use std::{ fs, path::Path, @@ -12,135 +13,126 @@ use std::{ }; use tracing::*; -use zenith_utils::lsn::Lsn; -use zenith_utils::zid::{ZTenantId, ZTimelineId}; +use zenith_utils::zid::{ZTenantId, ZTenantTimelineId, ZTimelineId}; use zenith_utils::{crashsafe_dir, logging}; +use zenith_utils::{lsn::Lsn, zid::HexZTimelineId}; -use crate::{config::PageServerConf, repository::Repository}; +use crate::{ + config::PageServerConf, + layered_repository::metadata::TimelineMetadata, + remote_storage::RemoteTimelineIndex, + repository::{LocalTimelineState, Repository}, +}; use crate::{import_datadir, LOG_FILE_NAME}; use crate::{layered_repository::LayeredRepository, walredo::WalRedoManager}; use crate::{repository::RepositoryTimeline, tenant_mgr}; use crate::{repository::Timeline, CheckpointConfig}; -#[derive(Clone)] -pub enum TimelineInfo { - Local { - timeline_id: ZTimelineId, - tenant_id: ZTenantId, - last_record_lsn: Lsn, - prev_record_lsn: Lsn, - ancestor_timeline_id: Option, - ancestor_lsn: Option, - disk_consistent_lsn: Lsn, - current_logical_size: usize, - current_logical_size_non_incremental: Option, - }, - Remote { - timeline_id: ZTimelineId, - tenant_id: ZTenantId, - disk_consistent_lsn: Lsn, - }, +#[derive(Debug, Serialize, Deserialize, Clone)] +pub struct LocalTimelineInfo { + pub ancestor_timeline_id: Option, + pub ancestor_lsn: Option, + pub last_record_lsn: Lsn, + pub prev_record_lsn: Option, + pub disk_consistent_lsn: Lsn, + pub current_logical_size: Option, // is None when timeline is Unloaded + pub current_logical_size_non_incremental: Option, + pub timeline_state: LocalTimelineState, } -impl TimelineInfo { - pub fn from_repo_timeline( - tenant_id: ZTenantId, - repo_timeline: RepositoryTimeline, - include_non_incremental_logical_size: bool, - ) -> Self { - match repo_timeline { - RepositoryTimeline::Local { id, timeline } => { - let ancestor_timeline_id = timeline.get_ancestor_timeline_id(); - let ancestor_lsn = if ancestor_timeline_id.is_some() { - Some(timeline.get_ancestor_lsn()) - } else { - None - }; - - Self::Local { - timeline_id: id, - tenant_id, - last_record_lsn: timeline.get_last_record_lsn(), - prev_record_lsn: timeline.get_prev_record_lsn(), - ancestor_timeline_id, - ancestor_lsn, - disk_consistent_lsn: timeline.get_disk_consistent_lsn(), - current_logical_size: timeline.get_current_logical_size(), - current_logical_size_non_incremental: get_current_logical_size_non_incremental( - include_non_incremental_logical_size, - timeline.as_ref(), - ), - } - } - RepositoryTimeline::Remote { - id, - disk_consistent_lsn, - } => Self::Remote { - timeline_id: id, - tenant_id, - disk_consistent_lsn, - }, - } - } - - pub fn from_dyn_timeline( - tenant_id: ZTenantId, - timeline_id: ZTimelineId, +impl LocalTimelineInfo { + pub fn from_loaded_timeline( timeline: &dyn Timeline, include_non_incremental_logical_size: bool, - ) -> Self { - let ancestor_timeline_id = timeline.get_ancestor_timeline_id(); - let ancestor_lsn = if ancestor_timeline_id.is_some() { - Some(timeline.get_ancestor_lsn()) - } else { - None - }; - - Self::Local { - timeline_id, - tenant_id, - last_record_lsn: timeline.get_last_record_lsn(), - prev_record_lsn: timeline.get_prev_record_lsn(), - ancestor_timeline_id, - ancestor_lsn, + ) -> anyhow::Result { + let last_record_lsn = timeline.get_last_record_lsn(); + let info = LocalTimelineInfo { + ancestor_timeline_id: timeline + .get_ancestor_timeline_id() + .map(HexZTimelineId::from), + ancestor_lsn: { + match timeline.get_ancestor_lsn() { + Lsn(0) => None, + lsn @ Lsn(_) => Some(lsn), + } + }, disk_consistent_lsn: timeline.get_disk_consistent_lsn(), - current_logical_size: timeline.get_current_logical_size(), - current_logical_size_non_incremental: get_current_logical_size_non_incremental( - include_non_incremental_logical_size, - timeline, - ), + last_record_lsn, + prev_record_lsn: Some(timeline.get_prev_record_lsn()), + timeline_state: LocalTimelineState::Loaded, + current_logical_size: Some(timeline.get_current_logical_size()), + current_logical_size_non_incremental: if include_non_incremental_logical_size { + Some(timeline.get_current_logical_size_non_incremental(last_record_lsn)?) + } else { + None + }, + }; + Ok(info) + } + + pub fn from_unloaded_timeline(metadata: &TimelineMetadata) -> Self { + LocalTimelineInfo { + ancestor_timeline_id: metadata.ancestor_timeline().map(HexZTimelineId::from), + ancestor_lsn: { + match metadata.ancestor_lsn() { + Lsn(0) => None, + lsn @ Lsn(_) => Some(lsn), + } + }, + disk_consistent_lsn: metadata.disk_consistent_lsn(), + last_record_lsn: metadata.disk_consistent_lsn(), + prev_record_lsn: metadata.prev_record_lsn(), + timeline_state: LocalTimelineState::Unloaded, + current_logical_size: None, + current_logical_size_non_incremental: None, } } - pub fn timeline_id(&self) -> ZTimelineId { - match *self { - TimelineInfo::Local { timeline_id, .. } => timeline_id, - TimelineInfo::Remote { timeline_id, .. } => timeline_id, - } - } - - pub fn tenant_id(&self) -> ZTenantId { - match *self { - TimelineInfo::Local { tenant_id, .. } => tenant_id, - TimelineInfo::Remote { tenant_id, .. } => tenant_id, + pub fn from_repo_timeline( + repo_timeline: RepositoryTimeline, + include_non_incremental_logical_size: bool, + ) -> anyhow::Result { + match repo_timeline { + RepositoryTimeline::Loaded(timeline) => { + Self::from_loaded_timeline(timeline.as_ref(), include_non_incremental_logical_size) + } + RepositoryTimeline::Unloaded { metadata } => { + Ok(Self::from_unloaded_timeline(&metadata)) + } } } } -fn get_current_logical_size_non_incremental( - include_non_incremental_logical_size: bool, - timeline: &dyn Timeline, -) -> Option { - if !include_non_incremental_logical_size { - return None; - } - match timeline.get_current_logical_size_non_incremental(timeline.get_last_record_lsn()) { - Ok(size) => Some(size), - Err(e) => { - error!("Failed to get non-incremental logical size: {:?}", e); - None - } - } +#[derive(Debug, Serialize, Deserialize, Clone)] +pub struct RemoteTimelineInfo { + pub remote_consistent_lsn: Option, + pub awaits_download: bool, +} + +#[derive(Debug, Serialize, Deserialize, Clone)] +pub struct TimelineInfo { + #[serde(with = "hex")] + pub tenant_id: ZTenantId, + #[serde(with = "hex")] + pub timeline_id: ZTimelineId, + pub local: Option, + pub remote: Option, +} + +pub fn extract_remote_timeline_info( + tenant_id: ZTenantId, + timeline_id: ZTimelineId, + remote_index: &RemoteTimelineIndex, +) -> Option { + remote_index + .timeline_entry(&ZTenantTimelineId { + tenant_id, + timeline_id, + }) + .map(|remote_entry| RemoteTimelineInfo { + remote_consistent_lsn: remote_entry.disk_consistent_lsn(), + awaits_download: remote_entry.get_awaits_download(), + }) } #[derive(Debug, Clone, Copy)] @@ -158,25 +150,12 @@ pub fn init_pageserver( // use true as daemonize parameter because otherwise we pollute zenith cli output with a few pages long output of info messages let _log_file = logging::init(LOG_FILE_NAME, true)?; - // We don't use the real WAL redo manager, because we don't want to spawn the WAL redo - // process during repository initialization. - // - // FIXME: That caused trouble, because the WAL redo manager spawned a thread that launched - // initdb in the background, and it kept running even after the "zenith init" had exited. - // In tests, we started the page server immediately after that, so that initdb was still - // running in the background, and we failed to run initdb again in the same directory. This - // has been solved for the rapid init+start case now, but the general race condition remains - // if you restart the server quickly. The WAL redo manager doesn't use a separate thread - // anymore, but I think that could still happen. - let dummy_redo_mgr = Arc::new(crate::walredo::DummyRedoManager {}); - crashsafe_dir::create_dir_all(conf.tenants_path())?; if let Some(tenant_id) = create_tenant { println!("initializing tenantid {}", tenant_id); - let repo = create_repo(conf, tenant_id, dummy_redo_mgr) - .context("failed to create repo")? - .ok_or_else(|| anyhow!("For newely created pageserver, found already existing repository for tenant {}", tenant_id))?; + let repo = + create_repo(conf, tenant_id, CreateRepo::Dummy).context("failed to create repo")?; let new_timeline_id = initial_timeline_id.unwrap_or_else(ZTimelineId::generate); bootstrap_timeline(conf, tenant_id, new_timeline_id, repo.as_ref()) .context("failed to create initial timeline")?; @@ -189,15 +168,45 @@ pub fn init_pageserver( Ok(()) } +pub enum CreateRepo { + Real { + wal_redo_manager: Arc, + remote_index: Arc>, + }, + Dummy, +} + pub fn create_repo( conf: &'static PageServerConf, tenant_id: ZTenantId, - wal_redo_manager: Arc, -) -> Result>> { + create_repo: CreateRepo, +) -> Result> { + let (wal_redo_manager, remote_index) = match create_repo { + CreateRepo::Real { + wal_redo_manager, + remote_index, + } => (wal_redo_manager, remote_index), + CreateRepo::Dummy => { + // We don't use the real WAL redo manager, because we don't want to spawn the WAL redo + // process during repository initialization. + // + // FIXME: That caused trouble, because the WAL redo manager spawned a thread that launched + // initdb in the background, and it kept running even after the "zenith init" had exited. + // In tests, we started the page server immediately after that, so that initdb was still + // running in the background, and we failed to run initdb again in the same directory. This + // has been solved for the rapid init+start case now, but the general race condition remains + // if you restart the server quickly. The WAL redo manager doesn't use a separate thread + // anymore, but I think that could still happen. + let wal_redo_manager = Arc::new(crate::walredo::DummyRedoManager {}); + + let remote_index = Arc::new(tokio::sync::RwLock::new(RemoteTimelineIndex::empty())); + (wal_redo_manager as _, remote_index) + } + }; + let repo_dir = conf.tenant_path(&tenant_id); if repo_dir.exists() { - debug!("repo for {} already exists", tenant_id); - return Ok(None); + bail!("tenant {} directory already exists", tenant_id); } // top-level dir may exist if we are creating it through CLI @@ -206,12 +215,13 @@ pub fn create_repo( crashsafe_dir::create_dir(conf.timelines_path(&tenant_id))?; info!("created directory structure in {}", repo_dir.display()); - Ok(Some(Arc::new(LayeredRepository::new( + Ok(Arc::new(LayeredRepository::new( conf, wal_redo_manager, tenant_id, + remote_index, conf.remote_storage_config.is_some(), - )))) + ))) } // Returns checkpoint LSN from controlfile @@ -299,30 +309,25 @@ fn bootstrap_timeline( Ok(timeline) } -pub(crate) fn get_timelines( +pub(crate) fn get_local_timelines( tenant_id: ZTenantId, include_non_incremental_logical_size: bool, -) -> Result> { +) -> Result> { let repo = tenant_mgr::get_repository_for_tenant(tenant_id) .with_context(|| format!("Failed to get repo for tenant {}", tenant_id))?; + let repo_timelines = repo.list_timelines(); - Ok(repo - .list_timelines() - .with_context(|| format!("Failed to list timelines for tenant {}", tenant_id))? - .into_iter() - .filter_map(|timeline| match timeline { - RepositoryTimeline::Local { timeline, id } => Some((id, timeline)), - RepositoryTimeline::Remote { .. } => None, - }) - .map(|(timeline_id, timeline)| { - TimelineInfo::from_dyn_timeline( - tenant_id, - timeline_id, - timeline.as_ref(), + let mut local_timeline_info = Vec::with_capacity(repo_timelines.len()); + for (timeline_id, repository_timeline) in repo_timelines { + local_timeline_info.push(( + timeline_id, + LocalTimelineInfo::from_repo_timeline( + repository_timeline, include_non_incremental_logical_size, - ) - }) - .collect()) + )?, + )) + } + Ok(local_timeline_info) } pub(crate) fn create_timeline( @@ -336,16 +341,8 @@ pub(crate) fn create_timeline( let repo = tenant_mgr::get_repository_for_tenant(tenant_id)?; if conf.timeline_path(&new_timeline_id, &tenant_id).exists() { - match repo.get_timeline(new_timeline_id)? { - RepositoryTimeline::Local { id, .. } => { - debug!("timeline {} already exists", id); - return Ok(None); - } - RepositoryTimeline::Remote { id, .. } => bail!( - "timeline {} already exists in pageserver's remote storage", - id - ), - } + debug!("timeline {} already exists", new_timeline_id); + return Ok(None); } let mut start_lsn = ancestor_start_lsn.unwrap_or(Lsn(0)); @@ -353,15 +350,8 @@ pub(crate) fn create_timeline( let new_timeline_info = match ancestor_timeline_id { Some(ancestor_timeline_id) => { let ancestor_timeline = repo - .get_timeline(ancestor_timeline_id) - .with_context(|| format!("Cannot get ancestor timeline {}", ancestor_timeline_id))? - .local_timeline() - .with_context(|| { - format!( - "Cannot branch off the timeline {} that's not present locally", - ancestor_timeline_id - ) - })?; + .get_timeline_load(ancestor_timeline_id) + .context("Cannot branch off the timeline that's not present locally")?; if start_lsn == Lsn(0) { // Find end of WAL on the old timeline @@ -391,18 +381,20 @@ pub(crate) fn create_timeline( } repo.branch_timeline(ancestor_timeline_id, new_timeline_id, start_lsn)?; // load the timeline into memory - let loaded_timeline = repo.get_timeline(new_timeline_id)?; - TimelineInfo::from_repo_timeline(tenant_id, loaded_timeline, false) + let loaded_timeline = repo.get_timeline_load(new_timeline_id)?; + LocalTimelineInfo::from_loaded_timeline(loaded_timeline.as_ref(), false) + .context("cannot fill timeline info")? } None => { let new_timeline = bootstrap_timeline(conf, tenant_id, new_timeline_id, repo.as_ref())?; - TimelineInfo::from_dyn_timeline( - tenant_id, - new_timeline_id, - new_timeline.as_ref(), - false, - ) + LocalTimelineInfo::from_loaded_timeline(new_timeline.as_ref(), false) + .context("cannot fill timeline info")? } }; - Ok(Some(new_timeline_info)) + Ok(Some(TimelineInfo { + tenant_id, + timeline_id: new_timeline_id, + local: Some(new_timeline_info), + remote: None, + })) } diff --git a/pageserver/src/walreceiver.rs b/pageserver/src/walreceiver.rs index 6fff1d062d..305dd4b3a2 100644 --- a/pageserver/src/walreceiver.rs +++ b/pageserver/src/walreceiver.rs @@ -31,6 +31,7 @@ use tracing::*; use zenith_utils::lsn::Lsn; use zenith_utils::pq_proto::ZenithFeedback; use zenith_utils::zid::ZTenantId; +use zenith_utils::zid::ZTenantTimelineId; use zenith_utils::zid::ZTimelineId; // @@ -111,18 +112,18 @@ fn get_wal_producer_connstr(tenantid: ZTenantId, timelineid: ZTimelineId) -> Str // fn thread_main( conf: &'static PageServerConf, - tenantid: ZTenantId, - timelineid: ZTimelineId, + tenant_id: ZTenantId, + timeline_id: ZTimelineId, ) -> Result<()> { - let _enter = info_span!("WAL receiver", timeline = %timelineid, tenant = %tenantid).entered(); + let _enter = info_span!("WAL receiver", timeline = %timeline_id, tenant = %tenant_id).entered(); info!("WAL receiver thread started"); // Look up the current WAL producer address - let wal_producer_connstr = get_wal_producer_connstr(tenantid, timelineid); + let wal_producer_connstr = get_wal_producer_connstr(tenant_id, timeline_id); // Make a connection to the WAL safekeeper, or directly to the primary PostgreSQL server, // and start streaming WAL from it. - let res = walreceiver_main(conf, tenantid, timelineid, &wal_producer_connstr); + let res = walreceiver_main(conf, tenant_id, timeline_id, &wal_producer_connstr); // TODO cleanup info messages if let Err(e) = res { @@ -130,20 +131,20 @@ fn thread_main( } else { info!( "walreceiver disconnected tenant {}, timelineid {}", - tenantid, timelineid + tenant_id, timeline_id ); } // Drop it from list of active WAL_RECEIVERS // so that next callmemaybe request launched a new thread - drop_wal_receiver(tenantid, timelineid); + drop_wal_receiver(tenant_id, timeline_id); Ok(()) } fn walreceiver_main( _conf: &PageServerConf, - tenantid: ZTenantId, - timelineid: ZTimelineId, + tenant_id: ZTenantId, + timeline_id: ZTimelineId, wal_producer_connstr: &str, ) -> Result<(), Error> { // Connect to the database in replication mode. @@ -182,13 +183,16 @@ fn walreceiver_main( let end_of_wal = Lsn::from(u64::from(identify.xlogpos)); let mut caught_up = false; - let timeline = - tenant_mgr::get_timeline_for_tenant(tenantid, timelineid).with_context(|| { - format!( - "Can not start the walrecever for a remote tenant {}, timeline {}", - tenantid, timelineid, - ) - })?; + let repo = tenant_mgr::get_repository_for_tenant(tenant_id) + .with_context(|| format!("no repository found for tenant {}", tenant_id))?; + let timeline = repo.get_timeline_load(timeline_id).with_context(|| { + format!( + "local timeline {} not found for tenant {}", + timeline_id, tenant_id + ) + })?; + + let remote_index = repo.get_remote_index(); // // Start streaming the WAL, from where we left off previously. @@ -292,11 +296,19 @@ fn walreceiver_main( }; if let Some(last_lsn) = status_update { - let timeline_synced_disk_consistent_lsn = - tenant_mgr::get_repository_for_tenant(tenantid)? - .get_timeline_state(timelineid) - .and_then(|state| state.remote_disk_consistent_lsn()) - .unwrap_or(Lsn(0)); + let timeline_remote_consistent_lsn = runtime.block_on(async { + remote_index + .read() + .await + // here we either do not have this timeline in remote index + // or there were no checkpoints for it yet + .timeline_entry(&ZTenantTimelineId { + tenant_id, + timeline_id, + }) + .and_then(|e| e.disk_consistent_lsn()) + .unwrap_or(Lsn(0)) // no checkpoint was uploaded + }); // The last LSN we processed. It is not guaranteed to survive pageserver crash. let write_lsn = u64::from(last_lsn); @@ -304,7 +316,7 @@ fn walreceiver_main( let flush_lsn = u64::from(timeline.get_disk_consistent_lsn()); // The last LSN that is synced to remote storage and is guaranteed to survive pageserver crash // Used by safekeepers to remove WAL preceding `remote_consistent_lsn`. - let apply_lsn = u64::from(timeline_synced_disk_consistent_lsn); + let apply_lsn = u64::from(timeline_remote_consistent_lsn); let ts = SystemTime::now(); // Send zenith feedback message. diff --git a/test_runner/batch_others/test_remote_storage.py b/test_runner/batch_others/test_remote_storage.py index edcc768819..8689838089 100644 --- a/test_runner/batch_others/test_remote_storage.py +++ b/test_runner/batch_others/test_remote_storage.py @@ -5,7 +5,7 @@ import time, shutil, os from contextlib import closing from pathlib import Path from uuid import UUID -from fixtures.zenith_fixtures import ZenithEnvBuilder +from fixtures.zenith_fixtures import ZenithEnvBuilder, assert_local, wait_for, wait_for_last_record_lsn, wait_for_upload from fixtures.log_helper import log import pytest @@ -26,7 +26,6 @@ import pytest # * queries the specific data, ensuring that it matches the one stored before # # The tests are done for all types of remote storage pageserver supports. -@pytest.mark.skip(reason="will be fixed with https://github.com/zenithdb/zenith/issues/1193") @pytest.mark.parametrize('storage_type', ['local_fs', 'mock_s3']) def test_remote_storage_backup_and_restore(zenith_env_builder: ZenithEnvBuilder, storage_type: str): zenith_env_builder.rust_log_override = 'debug' @@ -45,6 +44,8 @@ def test_remote_storage_backup_and_restore(zenith_env_builder: ZenithEnvBuilder, env = zenith_env_builder.init_start() pg = env.postgres.create_start('main') + client = env.pageserver.http_client() + tenant_id = pg.safe_psql("show zenith.zenith_tenant")[0][0] timeline_id = pg.safe_psql("show zenith.zenith_timeline")[0][0] @@ -54,13 +55,21 @@ def test_remote_storage_backup_and_restore(zenith_env_builder: ZenithEnvBuilder, CREATE TABLE t1(id int primary key, secret text); INSERT INTO t1 VALUES ({data_id}, '{data_secret}'); ''') + cur.execute("SELECT pg_current_wal_flush_lsn()") + current_lsn = int(cur.fetchone()[0].split('/')[1], base=16) + + # wait until pageserver receives that data + wait_for_last_record_lsn(client, UUID(tenant_id), UUID(timeline_id), current_lsn) # run checkpoint manually to be sure that data landed in remote storage with closing(env.pageserver.connect()) as psconn: with psconn.cursor() as pscur: - pscur.execute(f"do_gc {tenant_id} {timeline_id}") - log.info("waiting for upload") # TODO api to check if upload is done - time.sleep(2) + pscur.execute(f"checkpoint {tenant_id} {timeline_id}") + + log.info("waiting for upload") + # wait until pageserver successfully uploaded a checkpoint to remote storage + wait_for_upload(client, UUID(tenant_id), UUID(timeline_id), current_lsn) + log.info("upload is done") ##### Stop the first pageserver instance, erase all its data env.postgres.stop_all() @@ -73,26 +82,12 @@ def test_remote_storage_backup_and_restore(zenith_env_builder: ZenithEnvBuilder, ##### Second start, restore the data and ensure it's the same env.pageserver.start() - client = env.pageserver.http_client() client.timeline_attach(UUID(tenant_id), UUID(timeline_id)) - # FIXME cannot handle duplicate download requests (which might be caused by repeated timeline detail calls) - # subject to fix in https://github.com/zenithdb/zenith/issues/997 - time.sleep(5) log.info("waiting for timeline redownload") - attempts = 0 - while True: - timeline_details = client.timeline_detail(UUID(tenant_id), UUID(timeline_id)) - assert timeline_details['timeline_id'] == timeline_id - assert timeline_details['tenant_id'] == tenant_id - if timeline_details['kind'] == 'Local': - log.info("timeline downloaded, checking its data") - break - attempts += 1 - if attempts > 10: - raise Exception("timeline redownload failed") - log.debug("still waiting") - time.sleep(1) + wait_for(number_of_iterations=10, + interval=1, + func=lambda: assert_local(client, UUID(tenant_id), UUID(timeline_id))) pg = env.postgres.create_start('main') with closing(pg.connect()) as conn: diff --git a/test_runner/batch_others/test_tenant_relocation.py b/test_runner/batch_others/test_tenant_relocation.py index 7a9d478f16..e4492e5393 100644 --- a/test_runner/batch_others/test_tenant_relocation.py +++ b/test_runner/batch_others/test_tenant_relocation.py @@ -3,17 +3,19 @@ import os import pathlib import subprocess import threading +from typing import Dict from uuid import UUID from fixtures.log_helper import log import time import signal import pytest -from fixtures.zenith_fixtures import PgProtocol, PortDistributor, Postgres, ZenithEnvBuilder, ZenithPageserverHttpClient, zenith_binpath, pg_distrib_dir +from fixtures.zenith_fixtures import PgProtocol, PortDistributor, Postgres, ZenithEnvBuilder, ZenithPageserverHttpClient, assert_local, wait_for, wait_for_last_record_lsn, wait_for_upload, zenith_binpath, pg_distrib_dir def assert_abs_margin_ratio(a: float, b: float, margin_ratio: float): - assert abs(a - b) / a < margin_ratio, (a, b, margin_ratio) + print("!" * 100, abs(a - b) / a) + assert abs(a - b) / a < margin_ratio, abs(a - b) / a @contextmanager @@ -34,6 +36,7 @@ def new_pageserver_helper(new_pageserver_dir: pathlib.Path, f"-c listen_pg_addr='localhost:{pg_port}'", f"-c listen_http_addr='localhost:{http_port}'", f"-c pg_distrib_dir='{pg_distrib_dir}'", + f"-c id=2", f"-c remote_storage={{local_path='{remote_storage_mock_path}'}}", ] @@ -57,20 +60,6 @@ def new_pageserver_helper(new_pageserver_dir: pathlib.Path, os.kill(pid, signal.SIGQUIT) -def wait_for(number_of_iterations: int, interval: int, func): - last_exception = None - for i in range(number_of_iterations): - try: - res = func() - except Exception as e: - log.info("waiting for %s iteration %s failed", func, i + 1) - last_exception = e - time.sleep(interval) - continue - return res - raise Exception("timed out while waiting for %s" % func) from last_exception - - @contextmanager def pg_cur(pg): with closing(pg.connect()) as conn: @@ -108,13 +97,6 @@ def load(pg: Postgres, stop_event: threading.Event, load_ok_event: threading.Eve log.info('load thread stopped') -def assert_local(pageserver_http_client: ZenithPageserverHttpClient, tenant: UUID, timeline: str): - timeline_detail = pageserver_http_client.timeline_detail(tenant, UUID(timeline)) - assert timeline_detail.get('type') == "Local", timeline_detail - return timeline_detail - - -@pytest.mark.skip(reason="will be fixed with https://github.com/zenithdb/zenith/issues/1193") @pytest.mark.parametrize('with_load', ['with_load', 'without_load']) def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, port_distributor: PortDistributor, @@ -129,7 +111,7 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, tenant = env.zenith_cli.create_tenant(UUID("74ee8b079a0e437eb0afea7d26a07209")) log.info("tenant to relocate %s", tenant) - + env.zenith_cli.create_root_branch('main', tenant_id=tenant) env.zenith_cli.create_branch('test_tenant_relocation', tenant_id=tenant) tenant_pg = env.postgres.create_start(branch_name='main', @@ -141,8 +123,8 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, with conn.cursor() as cur: # save timeline for later gc call cur.execute("SHOW zenith.zenith_timeline") - timeline = cur.fetchone()[0] - log.info("timeline to relocate %s", timeline) + timeline = UUID(cur.fetchone()[0]) + log.info("timeline to relocate %s", timeline.hex) # we rely upon autocommit after each statement # as waiting for acceptors happens there @@ -150,6 +132,15 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, cur.execute("INSERT INTO t SELECT generate_series(1,1000), 'some payload'") cur.execute("SELECT sum(key) FROM t") assert cur.fetchone() == (500500, ) + cur.execute("SELECT pg_current_wal_flush_lsn()") + + current_lsn = int(cur.fetchone()[0].split('/')[1], base=16) + + pageserver_http = env.pageserver.http_client() + + # wait until pageserver receives that data + wait_for_last_record_lsn(pageserver_http, tenant, timeline, current_lsn) + timeline_detail = pageserver_http.timeline_detail_v2(tenant, timeline) if with_load == 'with_load': # create load table @@ -165,12 +156,10 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, # run checkpoint manually to be sure that data landed in remote storage with closing(env.pageserver.connect()) as psconn: with psconn.cursor() as pscur: - pscur.execute(f"do_gc {tenant.hex} {timeline}") + pscur.execute(f"checkpoint {tenant.hex} {timeline.hex}") - # ensure upload is completed - pageserver_http_client = env.pageserver.http_client() - timeline_detail = pageserver_http_client.timeline_detail(tenant, UUID(timeline)) - assert timeline_detail['disk_consistent_lsn'] == timeline_detail['timeline_state']['Ready'] + # wait until pageserver successfully uploaded a checkpoint to remote storage + wait_for_upload(pageserver_http, tenant, timeline, current_lsn) log.info("inititalizing new pageserver") # bootstrap second pageserver @@ -182,8 +171,7 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, log.info("new pageserver ports pg %s http %s", new_pageserver_pg_port, new_pageserver_http_port) pageserver_bin = pathlib.Path(zenith_binpath) / 'pageserver' - new_pageserver_http_client = ZenithPageserverHttpClient(port=new_pageserver_http_port, - auth_token=None) + new_pageserver_http = ZenithPageserverHttpClient(port=new_pageserver_http_port, auth_token=None) with new_pageserver_helper(new_pageserver_dir, pageserver_bin, @@ -192,25 +180,18 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, new_pageserver_http_port): # call to attach timeline to new pageserver - new_pageserver_http_client.timeline_attach(tenant, UUID(timeline)) - # FIXME cannot handle duplicate download requests, subject to fix in https://github.com/zenithdb/zenith/issues/997 - time.sleep(5) - # new pageserver should in sync (modulo wal tail or vacuum activity) with the old one because there was no new writes since checkpoint + new_pageserver_http.timeline_attach(tenant, timeline) + # new pageserver should be in sync (modulo wal tail or vacuum activity) with the old one because there was no new writes since checkpoint new_timeline_detail = wait_for( number_of_iterations=5, interval=1, - func=lambda: assert_local(new_pageserver_http_client, tenant, timeline)) - assert new_timeline_detail['timeline_state'].get('Ready'), new_timeline_detail + func=lambda: assert_local(new_pageserver_http, tenant, timeline)) + # when load is active these checks can break because lsns are not static # so lets check with some margin - if with_load == 'without_load': - # TODO revisit this once https://github.com/zenithdb/zenith/issues/1049 is fixed - assert_abs_margin_ratio(new_timeline_detail['disk_consistent_lsn'], - timeline_detail['disk_consistent_lsn'], - 0.01) - assert_abs_margin_ratio(new_timeline_detail['timeline_state']['Ready'], - timeline_detail['timeline_state']['Ready'], - 0.01) + assert_abs_margin_ratio(new_timeline_detail['local']['disk_consistent_lsn'], + timeline_detail['local']['disk_consistent_lsn'], + 0.03) # callmemaybe to start replication from safekeeper to the new pageserver # when there is no load there is a clean checkpoint and no wal delta @@ -219,7 +200,9 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, with pg_cur(PgProtocol(host='localhost', port=new_pageserver_pg_port)) as cur: # "callmemaybe {} {} host={} port={} options='-c ztimelineid={} ztenantid={}'" safekeeper_connstring = f"host=localhost port={env.safekeepers[0].port.pg} options='-c ztimelineid={timeline} ztenantid={tenant} pageserver_connstr=postgresql://no_user:@localhost:{new_pageserver_pg_port}'" - cur.execute("callmemaybe {} {} {}".format(tenant, timeline, safekeeper_connstring)) + cur.execute("callmemaybe {} {} {}".format(tenant.hex, + timeline.hex, + safekeeper_connstring)) tenant_pg.stop() @@ -239,7 +222,7 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, # detach tenant from old pageserver before we check # that all the data is there to be sure that old pageserver # is no longer involved, and if it is, we will see the errors - pageserver_http_client.timeline_detach(tenant, UUID(timeline)) + pageserver_http.timeline_detach(tenant, timeline) with pg_cur(tenant_pg) as cur: # check that data is still there diff --git a/test_runner/fixtures/zenith_fixtures.py b/test_runner/fixtures/zenith_fixtures.py index ec570a7dac..c44a6e431f 100644 --- a/test_runner/fixtures/zenith_fixtures.py +++ b/test_runner/fixtures/zenith_fixtures.py @@ -783,6 +783,15 @@ class ZenithPageserverHttpClient(requests.Session): assert isinstance(res_json, dict) return res_json + def timeline_detail_v2(self, tenant_id: uuid.UUID, timeline_id: uuid.UUID) -> Dict[Any, Any]: + res = self.get( + f"http://localhost:{self.port}/v2/tenant/{tenant_id.hex}/timeline/{timeline_id.hex}?include-non-incremental-logical-size=1" + ) + self.verbose_error(res) + res_json = res.json() + assert isinstance(res_json, dict) + return res_json + def get_metrics(self) -> str: res = self.get(f"http://localhost:{self.port}/metrics") self.verbose_error(res) @@ -866,6 +875,30 @@ class ZenithCli: return uuid.UUID(created_timeline_id) + def create_root_branch(self, branch_name: str, tenant_id: Optional[uuid.UUID] = None): + cmd = [ + 'timeline', + 'create', + '--branch-name', + branch_name, + '--tenant-id', + (tenant_id or self.env.initial_tenant).hex, + ] + + res = self.raw_cli(cmd) + res.check_returncode() + + matches = CREATE_TIMELINE_ID_EXTRACTOR.search(res.stdout) + + created_timeline_id = None + if matches is not None: + created_timeline_id = matches.group('timeline_id') + + if created_timeline_id is None: + raise Exception('could not find timeline id after `zenith timeline create` invocation') + else: + return uuid.UUID(created_timeline_id) + def create_branch(self, new_branch_name: str = DEFAULT_BRANCH_NAME, ancestor_branch_name: Optional[str] = None, @@ -1839,3 +1872,59 @@ def check_restored_datadir_content(test_output_dir: str, env: ZenithEnv, pg: Pos subprocess.run([cmd], stdout=stdout_f, shell=True) assert (mismatch, error) == ([], []) + + +def wait_for(number_of_iterations: int, interval: int, func): + last_exception = None + for i in range(number_of_iterations): + try: + res = func() + except Exception as e: + log.info("waiting for %s iteration %s failed", func, i + 1) + last_exception = e + time.sleep(interval) + continue + return res + raise Exception("timed out while waiting for %s" % func) from last_exception + + +def assert_local(pageserver_http_client: ZenithPageserverHttpClient, + tenant: uuid.UUID, + timeline: uuid.UUID): + timeline_detail = pageserver_http_client.timeline_detail_v2(tenant, timeline) + assert timeline_detail.get('local', {}).get("disk_consistent_lsn"), timeline_detail + return timeline_detail + + +def remote_consistent_lsn(pageserver_http_client: ZenithPageserverHttpClient, + tenant: uuid.UUID, + timeline: uuid.UUID) -> int: + detail = pageserver_http_client.timeline_detail_v2(tenant, timeline) + assert isinstance(detail['remote']['remote_consistent_lsn'], int) + return detail['remote']['remote_consistent_lsn'] + + +def wait_for_upload(pageserver_http_client: ZenithPageserverHttpClient, + tenant: uuid.UUID, + timeline: uuid.UUID, + lsn: int): + """waits for local timeline upload up to specified lsn""" + + wait_for(10, 1, lambda: remote_consistent_lsn(pageserver_http_client, tenant, timeline) >= lsn) + + +def last_record_lsn(pageserver_http_client: ZenithPageserverHttpClient, + tenant: uuid.UUID, + timeline: uuid.UUID) -> int: + detail = pageserver_http_client.timeline_detail_v2(tenant, timeline) + assert isinstance(detail['local']['last_record_lsn'], int) + return detail['local']['last_record_lsn'] + + +def wait_for_last_record_lsn(pageserver_http_client: ZenithPageserverHttpClient, + tenant: uuid.UUID, + timeline: uuid.UUID, + lsn: int): + """waits for pageserver to catch up to a certain lsn""" + + wait_for(10, 1, lambda: last_record_lsn(pageserver_http_client, tenant, timeline) >= lsn) diff --git a/zenith/src/main.rs b/zenith/src/main.rs index dd35427d5d..389c394103 100644 --- a/zenith/src/main.rs +++ b/zenith/src/main.rs @@ -299,42 +299,40 @@ fn print_timelines_tree( .iter() .map(|t| { ( - t.timeline_id(), + t.timeline_id, TimelineTreeEl { info: t.clone(), children: BTreeSet::new(), name: timeline_name_mappings - .remove(&ZTenantTimelineId::new(t.tenant_id(), t.timeline_id())), + .remove(&ZTenantTimelineId::new(t.tenant_id, t.timeline_id)), }, ) }) .collect::>(); // Memorize all direct children of each timeline. - for timeline in &timelines { - if let TimelineInfo::Local { - ancestor_timeline_id: Some(tid), - .. - } = timeline + for timeline in timelines.iter() { + if let Some(ancestor_timeline_id) = + timeline.local.as_ref().and_then(|l| l.ancestor_timeline_id) { timelines_hash - .get_mut(tid) + .get_mut(&ZTimelineId::from(ancestor_timeline_id)) .context("missing timeline info in the HashMap")? .children - .insert(timeline.timeline_id()); + .insert(timeline.timeline_id); } } for timeline in timelines_hash.values() { // Start with root local timelines (no ancestors) first. - if let TimelineInfo::Local { - ancestor_timeline_id, - .. - } = &timeline.info + if timeline + .info + .local + .as_ref() + .and_then(|l| l.ancestor_timeline_id) + .is_none() { - if ancestor_timeline_id.is_none() { - print_timeline(0, &Vec::from([true]), timeline, &timelines_hash)?; - } + print_timeline(0, &Vec::from([true]), timeline, &timelines_hash)?; } } @@ -350,20 +348,21 @@ fn print_timeline( timeline: &TimelineTreeEl, timelines: &HashMap, ) -> Result<()> { - let local_or_remote = match timeline.info { - TimelineInfo::Local { .. } => "(L)", - TimelineInfo::Remote { .. } => "(R)", + let local_remote = match (timeline.info.local.as_ref(), timeline.info.remote.as_ref()) { + (None, None) => unreachable!("in this case no info for a timeline is found"), + (None, Some(_)) => "(R)", + (Some(_), None) => "(L)", + (Some(_), Some(_)) => "(L+R)", }; // Draw main padding - print!("{} ", local_or_remote); + print!("{} ", local_remote); if nesting_level > 0 { - let lsn_string = match &timeline.info { - TimelineInfo::Local { ancestor_lsn, .. } => ancestor_lsn - .map(|lsn| lsn.to_string()) - .unwrap_or_else(|| "Unknown local Lsn".to_string()), - TimelineInfo::Remote { .. } => "unknown Lsn (remote)".to_string(), + let ancestor_lsn = match timeline.info.local.as_ref().and_then(|i| i.ancestor_lsn) { + Some(lsn) => lsn.to_string(), + None => "Unknown Lsn".to_string(), }; + let mut br_sym = "┣━"; // Draw each nesting padding with proper style @@ -383,14 +382,14 @@ fn print_timeline( br_sym = "┗━"; } - print!("{} @{}: ", br_sym, lsn_string); + print!("{} @{}: ", br_sym, ancestor_lsn); } // Finally print a timeline id and name with new line println!( "{} [{}]", timeline.name.as_deref().unwrap_or("_no_name_"), - timeline.info.timeline_id() + timeline.info.timeline_id ); let len = timeline.children.len(); @@ -430,7 +429,7 @@ fn get_timeline_infos( Ok(PageServerNode::from_env(env) .timeline_list(tenant_id)? .into_iter() - .map(|timeline_info| (timeline_info.timeline_id(), timeline_info)) + .map(|timeline_info| (timeline_info.timeline_id, timeline_info)) .collect()) } @@ -555,26 +554,17 @@ fn handle_timeline(timeline_match: &ArgMatches, env: &mut local_env::LocalEnv) - let timeline = pageserver .timeline_create(tenant_id, None, None, None)? .ok_or_else(|| anyhow!("Failed to create new timeline for tenant {}", tenant_id))?; - let new_timeline_id = timeline.timeline_id(); + let new_timeline_id = timeline.timeline_id; - let last_record_lsn = match timeline { - TimelineInfo::Local { - last_record_lsn, .. - } => last_record_lsn, - TimelineInfo::Remote { .. } => { - bail!( - "Timeline {} was created as remote, not local", - new_timeline_id - ) - } - }; + let last_record_lsn = timeline + .local + .expect("no local timeline info") + .last_record_lsn; env.register_branch_mapping(new_branch_name.to_string(), tenant_id, new_timeline_id)?; println!( "Created timeline '{}' at Lsn {} for tenant: {}", - timeline.timeline_id(), - last_record_lsn, - tenant_id, + timeline.timeline_id, last_record_lsn, tenant_id, ); } Some(("branch", branch_match)) => { @@ -602,26 +592,18 @@ fn handle_timeline(timeline_match: &ArgMatches, env: &mut local_env::LocalEnv) - let timeline = pageserver .timeline_create(tenant_id, None, start_lsn, Some(ancestor_timeline_id))? .ok_or_else(|| anyhow!("Failed to create new timeline for tenant {}", tenant_id))?; - let new_timeline_id = timeline.timeline_id(); + let new_timeline_id = timeline.timeline_id; - let last_record_lsn = match timeline { - TimelineInfo::Local { - last_record_lsn, .. - } => last_record_lsn, - TimelineInfo::Remote { .. } => bail!( - "Timeline {} was created as remote, not local", - new_timeline_id - ), - }; + let last_record_lsn = timeline + .local + .expect("no local timeline info") + .last_record_lsn; env.register_branch_mapping(new_branch_name.to_string(), tenant_id, new_timeline_id)?; println!( "Created timeline '{}' at Lsn {} for tenant: {}. Ancestor timeline: '{}'", - timeline.timeline_id(), - last_record_lsn, - tenant_id, - ancestor_branch_name, + timeline.timeline_id, last_record_lsn, tenant_id, ancestor_branch_name, ); } Some((sub_name, _)) => bail!("Unexpected tenant subcommand '{}'", sub_name), @@ -662,13 +644,8 @@ fn handle_pg(pg_match: &ArgMatches, env: &local_env::LocalEnv) -> Result<()> { // older point in time, or following but lagging behind the primary. let lsn_str = timeline_infos .get(&node.timeline_id) - .map(|bi| match bi { - TimelineInfo::Local { - last_record_lsn, .. - } => last_record_lsn.to_string(), - TimelineInfo::Remote { .. } => "? (remote)".to_string(), - }) - .unwrap_or_else(|| '?'.to_string()); + .and_then(|bi| bi.local.as_ref().map(|l| l.last_record_lsn.to_string())) + .unwrap_or_else(|| "?".to_string()); let branch_name = timeline_name_mappings .get(&ZTenantTimelineId::new(tenant_id, node.timeline_id)) diff --git a/zenith_utils/src/http/error.rs b/zenith_utils/src/http/error.rs index 3262c33a51..b23fa029d4 100644 --- a/zenith_utils/src/http/error.rs +++ b/zenith_utils/src/http/error.rs @@ -14,6 +14,9 @@ pub enum ApiError { #[error("Unauthorized: {0}")] Unauthorized(String), + #[error("NotFound: {0}")] + NotFound(String), + #[error(transparent)] InternalServerError(#[from] anyhow::Error), } @@ -36,6 +39,9 @@ impl ApiError { self.to_string(), StatusCode::UNAUTHORIZED, ), + ApiError::NotFound(_) => { + HttpErrorBody::response_from_msg_and_status(self.to_string(), StatusCode::NOT_FOUND) + } ApiError::InternalServerError(err) => HttpErrorBody::response_from_msg_and_status( err.to_string(), StatusCode::INTERNAL_SERVER_ERROR, From b19870cd88ed125101f928ddf533f393a7236f2f Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Thu, 17 Mar 2022 21:36:17 +0400 Subject: [PATCH 02/83] guard against partial uploads to local storage --- pageserver/src/remote_storage/local_fs.rs | 37 ++++++++++++++++++----- 1 file changed, 29 insertions(+), 8 deletions(-) diff --git a/pageserver/src/remote_storage/local_fs.rs b/pageserver/src/remote_storage/local_fs.rs index 01f6028d17..6cce127a7c 100644 --- a/pageserver/src/remote_storage/local_fs.rs +++ b/pageserver/src/remote_storage/local_fs.rs @@ -5,6 +5,7 @@ //! volume is mounted to the local FS. use std::{ + ffi::OsString, future::Future, path::{Path, PathBuf}, pin::Pin, @@ -83,11 +84,21 @@ impl RemoteStorage for LocalFs { ) -> anyhow::Result<()> { let target_file_path = self.resolve_in_storage(to)?; create_target_directory(&target_file_path).await?; + // We need this dance with sort of durable rename (without fsyncs) + // to prevent partial uploads. This was really hit when pageserver shutdown + // cancelled the upload and partial file was left on the fs + let mut temp_extension = target_file_path + .extension() + .unwrap_or_default() + .to_os_string(); + + temp_extension.push(OsString::from(".temp")); + let temp_file_path = target_file_path.with_extension(temp_extension); let mut destination = io::BufWriter::new( fs::OpenOptions::new() .write(true) .create(true) - .open(&target_file_path) + .open(&temp_file_path) .await .with_context(|| { format!( @@ -101,16 +112,26 @@ impl RemoteStorage for LocalFs { .await .with_context(|| { format!( - "Failed to upload file to the local storage at '{}'", + "Failed to upload file (write temp) to the local storage at '{}'", + temp_file_path.display() + ) + })?; + + destination.flush().await.with_context(|| { + format!( + "Failed to upload (flush temp) file to the local storage at '{}'", + temp_file_path.display() + ) + })?; + + fs::rename(temp_file_path, &target_file_path) + .await + .with_context(|| { + format!( + "Failed to upload (rename) file to the local storage at '{}'", target_file_path.display() ) })?; - destination.flush().await.with_context(|| { - format!( - "Failed to upload file to the local storage at '{}'", - target_file_path.display() - ) - })?; Ok(()) } From 3b069f5aef3fbcfc370814f825767f17d6997f67 Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Fri, 18 Mar 2022 21:27:48 +0200 Subject: [PATCH 03/83] Fix name of directory used in unit test. There's another test called 'timeline_load'. If the two tests run in parallel, they would conflict and fail. --- pageserver/src/repository.rs | 2 +- vendor/postgres | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/pageserver/src/repository.rs b/pageserver/src/repository.rs index e335f42519..074bdf4d01 100644 --- a/pageserver/src/repository.rs +++ b/pageserver/src/repository.rs @@ -1181,7 +1181,7 @@ mod tests { #[test] fn timeline_load_with_ancestor() -> Result<()> { - const TEST_NAME: &str = "timeline_load"; + const TEST_NAME: &str = "timeline_load_with_ancestor"; let harness = RepoHarness::create(TEST_NAME)?; // create two timelines { diff --git a/vendor/postgres b/vendor/postgres index 093aa160e5..5e9bc37322 160000 --- a/vendor/postgres +++ b/vendor/postgres @@ -1 +1 @@ -Subproject commit 093aa160e5df19814ff19b995d36dd5ee03c7f8b +Subproject commit 5e9bc3732266c072151df20d6772b47ca51e233f From 063f9ba81dfaa8f6c9b0b8797d41532715a40669 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Sat, 19 Mar 2022 02:38:29 +0200 Subject: [PATCH 04/83] Use serde_with to (de)serialize ZId and Lsn to hex --- Cargo.lock | 74 ++++++- control_plane/Cargo.toml | 1 + control_plane/src/local_env.rs | 26 +-- control_plane/src/storage.rs | 10 +- pageserver/Cargo.toml | 3 +- pageserver/src/http/models.rs | 84 ++++---- pageserver/src/http/routes.rs | 8 +- pageserver/src/tenant_mgr.rs | 4 +- pageserver/src/timelines.rs | 24 ++- .../batch_others/test_remote_storage.py | 3 +- .../batch_others/test_tenant_relocation.py | 7 +- test_runner/fixtures/zenith_fixtures.py | 14 +- zenith/src/main.rs | 8 +- zenith_utils/Cargo.toml | 1 + zenith_utils/src/auth.rs | 15 +- zenith_utils/src/zid.rs | 199 +----------------- 16 files changed, 192 insertions(+), 289 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 750ac0edc2..a9de71420b 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -441,6 +441,7 @@ dependencies = [ "regex", "reqwest", "serde", + "serde_with", "tar", "thiserror", "toml", @@ -600,6 +601,41 @@ dependencies = [ "libc", ] +[[package]] +name = "darling" +version = "0.13.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d0d720b8683f8dd83c65155f0530560cba68cd2bf395f6513a483caee57ff7f4" +dependencies = [ + "darling_core", + "darling_macro", +] + +[[package]] +name = "darling_core" +version = "0.13.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "7a340f241d2ceed1deb47ae36c4144b2707ec7dd0b649f894cb39bb595986324" +dependencies = [ + "fnv", + "ident_case", + "proc-macro2", + "quote", + "strsim 0.10.0", + "syn", +] + +[[package]] +name = "darling_macro" +version = "0.13.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "72c41b3b7352feb3211a0d743dc5700a4e3b60f51bd2b368892d1e0f9a95f44b" +dependencies = [ + "darling_core", + "quote", + "syn", +] + [[package]] name = "digest" version = "0.9.0" @@ -1038,6 +1074,12 @@ dependencies = [ "tokio-rustls 0.23.2", ] +[[package]] +name = "ident_case" +version = "1.0.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39" + [[package]] name = "idna" version = "0.2.3" @@ -1422,7 +1464,6 @@ dependencies = [ "daemonize", "fail", "futures", - "hex", "hex-literal", "humantime", "hyper", @@ -1440,6 +1481,7 @@ dependencies = [ "scopeguard", "serde", "serde_json", + "serde_with", "signal-hook", "tar", "tempfile", @@ -2075,6 +2117,12 @@ dependencies = [ "rustls 0.19.1", ] +[[package]] +name = "rustversion" +version = "1.0.6" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f2cc38e8fa666e2de3c4aba7edeb5ffc5246c1c2ed0e3d17e560aeeba736b23f" + [[package]] name = "ryu" version = "1.0.9" @@ -2187,6 +2235,29 @@ dependencies = [ "serde", ] +[[package]] +name = "serde_with" +version = "1.12.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ec1e6ec4d8950e5b1e894eac0d360742f3b1407a6078a604a731c4b3f49cefbc" +dependencies = [ + "rustversion", + "serde", + "serde_with_macros", +] + +[[package]] +name = "serde_with_macros" +version = "1.5.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "12e47be9471c72889ebafb5e14d5ff930d89ae7a67bbdb5f8abb564f845a927e" +dependencies = [ + "darling", + "proc-macro2", + "quote", + "syn", +] + [[package]] name = "sha2" version = "0.9.9" @@ -3056,6 +3127,7 @@ dependencies = [ "rustls-split", "serde", "serde_json", + "serde_with", "signal-hook", "tempfile", "thiserror", diff --git a/control_plane/Cargo.toml b/control_plane/Cargo.toml index eff6b3ef2d..b52c7ad5a9 100644 --- a/control_plane/Cargo.toml +++ b/control_plane/Cargo.toml @@ -7,6 +7,7 @@ edition = "2021" tar = "0.4.33" postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } serde = { version = "1.0", features = ["derive"] } +serde_with = "1.12.0" toml = "0.5" lazy_static = "1.4" regex = "1" diff --git a/control_plane/src/local_env.rs b/control_plane/src/local_env.rs index 2a1d51fe08..00ace431e6 100644 --- a/control_plane/src/local_env.rs +++ b/control_plane/src/local_env.rs @@ -5,6 +5,7 @@ use anyhow::{bail, ensure, Context}; use serde::{Deserialize, Serialize}; +use serde_with::{serde_as, DisplayFromStr}; use std::collections::HashMap; use std::env; use std::fs; @@ -12,9 +13,7 @@ use std::path::{Path, PathBuf}; use std::process::{Command, Stdio}; use zenith_utils::auth::{encode_from_key_file, Claims, Scope}; use zenith_utils::postgres_backend::AuthType; -use zenith_utils::zid::{ - HexZTenantId, HexZTimelineId, ZNodeId, ZTenantId, ZTenantTimelineId, ZTimelineId, -}; +use zenith_utils::zid::{ZNodeId, ZTenantId, ZTenantTimelineId, ZTimelineId}; use crate::safekeeper::SafekeeperNode; @@ -25,6 +24,7 @@ use crate::safekeeper::SafekeeperNode; // to 'zenith init --config=' option. See control_plane/simple.conf for // an example. // +#[serde_as] #[derive(Serialize, Deserialize, PartialEq, Eq, Clone, Debug)] pub struct LocalEnv { // Base directory for all the nodes (the pageserver, safekeepers and @@ -50,7 +50,8 @@ pub struct LocalEnv { // Default tenant ID to use with the 'zenith' command line utility, when // --tenantid is not explicitly specified. #[serde(default)] - pub default_tenant_id: Option, + #[serde_as(as = "Option")] + pub default_tenant_id: Option, // used to issue tokens during e.g pg start #[serde(default)] @@ -66,7 +67,8 @@ pub struct LocalEnv { // A `HashMap>` would be more appropriate here, // but deserialization into a generic toml object as `toml::Value::try_from` fails with an error. // https://toml.io/en/v1.0.0 does not contain a concept of "a table inside another table". - branch_name_mappings: HashMap>, + #[serde_as(as = "HashMap<_, Vec<(DisplayFromStr, DisplayFromStr)>>")] + branch_name_mappings: HashMap>, } #[derive(Serialize, Deserialize, PartialEq, Eq, Clone, Debug)] @@ -164,9 +166,6 @@ impl LocalEnv { .entry(branch_name.clone()) .or_default(); - let tenant_id = HexZTenantId::from(tenant_id); - let timeline_id = HexZTimelineId::from(timeline_id); - let existing_ids = existing_values .iter() .find(|(existing_tenant_id, _)| existing_tenant_id == &tenant_id); @@ -193,7 +192,6 @@ impl LocalEnv { branch_name: &str, tenant_id: ZTenantId, ) -> Option { - let tenant_id = HexZTenantId::from(tenant_id); self.branch_name_mappings .get(branch_name)? .iter() @@ -207,13 +205,7 @@ impl LocalEnv { .iter() .flat_map(|(name, tenant_timelines)| { tenant_timelines.iter().map(|&(tenant_id, timeline_id)| { - ( - ZTenantTimelineId::new( - ZTenantId::from(tenant_id), - ZTimelineId::from(timeline_id), - ), - name.clone(), - ) + (ZTenantTimelineId::new(tenant_id, timeline_id), name.clone()) }) }) .collect() @@ -259,7 +251,7 @@ impl LocalEnv { // If no initial tenant ID was given, generate it. if env.default_tenant_id.is_none() { - env.default_tenant_id = Some(HexZTenantId::from(ZTenantId::generate())); + env.default_tenant_id = Some(ZTenantId::generate()); } env.base_data_dir = base_path(); diff --git a/control_plane/src/storage.rs b/control_plane/src/storage.rs index ef43ba3c1e..835c93bf1d 100644 --- a/control_plane/src/storage.rs +++ b/control_plane/src/storage.rs @@ -18,7 +18,7 @@ use thiserror::Error; use zenith_utils::http::error::HttpErrorBody; use zenith_utils::lsn::Lsn; use zenith_utils::postgres_backend::AuthType; -use zenith_utils::zid::{HexZTenantId, HexZTimelineId, ZTenantId, ZTimelineId}; +use zenith_utils::zid::{ZTenantId, ZTimelineId}; use crate::local_env::LocalEnv; use crate::{fill_rust_env_vars, read_pidfile}; @@ -337,9 +337,7 @@ impl PageServerNode { ) -> anyhow::Result> { let tenant_id_string = self .http_request(Method::POST, format!("{}/tenant", self.http_base_url)) - .json(&TenantCreateRequest { - new_tenant_id: new_tenant_id.map(HexZTenantId::from), - }) + .json(&TenantCreateRequest { new_tenant_id }) .send()? .error_from_body()? .json::>()?; @@ -382,9 +380,9 @@ impl PageServerNode { format!("{}/tenant/{}/timeline", self.http_base_url, tenant_id), ) .json(&TimelineCreateRequest { - new_timeline_id: new_timeline_id.map(HexZTimelineId::from), + new_timeline_id, ancestor_start_lsn, - ancestor_timeline_id: ancestor_timeline_id.map(HexZTimelineId::from), + ancestor_timeline_id, }) .send()? .error_from_body()? diff --git a/pageserver/Cargo.toml b/pageserver/Cargo.toml index cfcb453732..efd2fa4a38 100644 --- a/pageserver/Cargo.toml +++ b/pageserver/Cargo.toml @@ -25,11 +25,12 @@ tokio-stream = "0.1.8" anyhow = { version = "1.0", features = ["backtrace"] } crc32c = "0.6.0" thiserror = "1.0" -hex = { version = "0.4.3", features = ["serde"] } tar = "0.4.33" humantime = "2.1.0" serde = { version = "1.0", features = ["derive"] } serde_json = "1" +serde_with = "1.12.0" + toml_edit = { version = "0.13", features = ["easy"] } scopeguard = "1.1.0" async-trait = "0.1" diff --git a/pageserver/src/http/models.rs b/pageserver/src/http/models.rs index 8827713f11..c28cd0def7 100644 --- a/pageserver/src/http/models.rs +++ b/pageserver/src/http/models.rs @@ -1,24 +1,39 @@ -use anyhow::Context; use serde::{Deserialize, Serialize}; +use serde_with::{serde_as, DisplayFromStr}; use zenith_utils::{ lsn::Lsn, - zid::{HexZTenantId, HexZTimelineId, ZNodeId, ZTenantId, ZTimelineId}, + zid::{ZNodeId, ZTenantId, ZTimelineId}, }; use crate::timelines::{LocalTimelineInfo, TimelineInfo}; +#[serde_as] #[derive(Serialize, Deserialize)] pub struct TimelineCreateRequest { - pub new_timeline_id: Option, - pub ancestor_timeline_id: Option, + #[serde(default)] + #[serde_as(as = "Option")] + pub new_timeline_id: Option, + #[serde(default)] + #[serde_as(as = "Option")] + pub ancestor_timeline_id: Option, + #[serde(default)] + #[serde_as(as = "Option")] pub ancestor_start_lsn: Option, } +#[serde_as] #[derive(Serialize, Deserialize)] pub struct TenantCreateRequest { - pub new_tenant_id: Option, + #[serde(default)] + #[serde_as(as = "Option")] + pub new_tenant_id: Option, } +#[serde_as] +#[derive(Serialize, Deserialize)] +#[serde(transparent)] +pub struct TenantCreateResponse(#[serde_as(as = "DisplayFromStr")] pub ZTenantId); + #[derive(Clone)] pub enum TimelineInfoV1 { Local { @@ -39,18 +54,24 @@ pub enum TimelineInfoV1 { }, } +#[serde_as] #[derive(Serialize, Deserialize)] pub struct TimelineInfoResponseV1 { pub kind: String, - #[serde(with = "hex")] + #[serde_as(as = "DisplayFromStr")] timeline_id: ZTimelineId, - #[serde(with = "hex")] + #[serde_as(as = "DisplayFromStr")] tenant_id: ZTenantId, - disk_consistent_lsn: String, - last_record_lsn: Option, - prev_record_lsn: Option, - ancestor_timeline_id: Option, - ancestor_lsn: Option, + #[serde_as(as = "DisplayFromStr")] + disk_consistent_lsn: Lsn, + #[serde_as(as = "Option")] + last_record_lsn: Option, + #[serde_as(as = "Option")] + prev_record_lsn: Option, + #[serde_as(as = "Option")] + ancestor_timeline_id: Option, + #[serde_as(as = "Option")] + ancestor_lsn: Option, current_logical_size: Option, current_logical_size_non_incremental: Option, } @@ -72,11 +93,11 @@ impl From for TimelineInfoResponseV1 { kind: "Local".to_owned(), timeline_id, tenant_id, - disk_consistent_lsn: disk_consistent_lsn.to_string(), - last_record_lsn: Some(last_record_lsn.to_string()), - prev_record_lsn: prev_record_lsn.map(|lsn| lsn.to_string()), - ancestor_timeline_id: ancestor_timeline_id.map(HexZTimelineId::from), - ancestor_lsn: ancestor_lsn.map(|lsn| lsn.to_string()), + disk_consistent_lsn, + last_record_lsn: Some(last_record_lsn), + prev_record_lsn, + ancestor_timeline_id, + ancestor_lsn, current_logical_size, current_logical_size_non_incremental, }, @@ -88,7 +109,7 @@ impl From for TimelineInfoResponseV1 { kind: "Remote".to_owned(), timeline_id, tenant_id, - disk_consistent_lsn: disk_consistent_lsn.to_string(), + disk_consistent_lsn, last_record_lsn: None, prev_record_lsn: None, ancestor_timeline_id: None, @@ -104,37 +125,24 @@ impl TryFrom for TimelineInfoV1 { type Error = anyhow::Error; fn try_from(other: TimelineInfoResponseV1) -> anyhow::Result { - let parse_lsn_hex_string = |lsn_string: String| { - lsn_string - .parse::() - .with_context(|| format!("Failed to parse Lsn as hex string from '{}'", lsn_string)) - }; - - let disk_consistent_lsn = parse_lsn_hex_string(other.disk_consistent_lsn)?; Ok(match other.kind.as_str() { "Local" => TimelineInfoV1::Local { timeline_id: other.timeline_id, tenant_id: other.tenant_id, - last_record_lsn: other - .last_record_lsn - .ok_or(anyhow::anyhow!( - "Local timeline should have last_record_lsn" - )) - .and_then(parse_lsn_hex_string)?, - prev_record_lsn: other - .prev_record_lsn - .map(parse_lsn_hex_string) - .transpose()?, + last_record_lsn: other.last_record_lsn.ok_or(anyhow::anyhow!( + "Local timeline should have last_record_lsn" + ))?, + prev_record_lsn: other.prev_record_lsn, ancestor_timeline_id: other.ancestor_timeline_id.map(ZTimelineId::from), - ancestor_lsn: other.ancestor_lsn.map(parse_lsn_hex_string).transpose()?, - disk_consistent_lsn, + ancestor_lsn: other.ancestor_lsn, + disk_consistent_lsn: other.disk_consistent_lsn, current_logical_size: other.current_logical_size, current_logical_size_non_incremental: other.current_logical_size_non_incremental, }, "Remote" => TimelineInfoV1::Remote { timeline_id: other.timeline_id, tenant_id: other.tenant_id, - disk_consistent_lsn, + disk_consistent_lsn: other.disk_consistent_lsn, }, unknown => anyhow::bail!("Unknown timeline kind: {}", unknown), }) diff --git a/pageserver/src/http/routes.rs b/pageserver/src/http/routes.rs index 2d913afe4e..a1249f463a 100644 --- a/pageserver/src/http/routes.rs +++ b/pageserver/src/http/routes.rs @@ -17,11 +17,11 @@ use zenith_utils::http::{ request::parse_request_param, }; use zenith_utils::http::{RequestExt, RouterBuilder}; -use zenith_utils::zid::{HexZTenantId, ZTenantTimelineId, ZTimelineId}; +use zenith_utils::zid::{ZTenantTimelineId, ZTimelineId}; use super::models::{ - StatusResponse, TenantCreateRequest, TimelineCreateRequest, TimelineInfoResponseV1, - TimelineInfoV1, + StatusResponse, TenantCreateRequest, TenantCreateResponse, TimelineCreateRequest, + TimelineInfoResponseV1, TimelineInfoV1, }; use crate::remote_storage::{schedule_timeline_download, RemoteTimelineIndex}; use crate::timelines::{ @@ -308,7 +308,7 @@ async fn tenant_create_handler(mut request: Request) -> Result json_response(StatusCode::CREATED, HexZTenantId::from(id))?, + Some(id) => json_response(StatusCode::CREATED, TenantCreateResponse(id))?, None => json_response(StatusCode::CONFLICT, ())?, }) } diff --git a/pageserver/src/tenant_mgr.rs b/pageserver/src/tenant_mgr.rs index 8584bdd424..4d6dfd7488 100644 --- a/pageserver/src/tenant_mgr.rs +++ b/pageserver/src/tenant_mgr.rs @@ -15,6 +15,7 @@ use anyhow::{Context, Result}; use lazy_static::lazy_static; use log::*; use serde::{Deserialize, Serialize}; +use serde_with::{serde_as, DisplayFromStr}; use std::collections::hash_map::Entry; use std::collections::HashMap; use std::fmt; @@ -267,9 +268,10 @@ pub fn get_timeline_for_tenant_load( .with_context(|| format!("Timeline {} not found for tenant {}", timelineid, tenantid)) } +#[serde_as] #[derive(Serialize, Deserialize, Clone)] pub struct TenantInfo { - #[serde(with = "hex")] + #[serde_as(as = "DisplayFromStr")] pub id: ZTenantId, pub state: TenantState, } diff --git a/pageserver/src/timelines.rs b/pageserver/src/timelines.rs index 9cfc21b413..00dd0f8f9c 100644 --- a/pageserver/src/timelines.rs +++ b/pageserver/src/timelines.rs @@ -5,6 +5,7 @@ use anyhow::{bail, Context, Result}; use postgres_ffi::ControlFileData; use serde::{Deserialize, Serialize}; +use serde_with::{serde_as, DisplayFromStr}; use std::{ fs, path::Path, @@ -13,9 +14,9 @@ use std::{ }; use tracing::*; +use zenith_utils::lsn::Lsn; use zenith_utils::zid::{ZTenantId, ZTenantTimelineId, ZTimelineId}; use zenith_utils::{crashsafe_dir, logging}; -use zenith_utils::{lsn::Lsn, zid::HexZTimelineId}; use crate::{ config::PageServerConf, @@ -28,12 +29,18 @@ use crate::{layered_repository::LayeredRepository, walredo::WalRedoManager}; use crate::{repository::RepositoryTimeline, tenant_mgr}; use crate::{repository::Timeline, CheckpointConfig}; +#[serde_as] #[derive(Debug, Serialize, Deserialize, Clone)] pub struct LocalTimelineInfo { - pub ancestor_timeline_id: Option, + #[serde_as(as = "Option")] + pub ancestor_timeline_id: Option, + #[serde_as(as = "Option")] pub ancestor_lsn: Option, + #[serde_as(as = "DisplayFromStr")] pub last_record_lsn: Lsn, + #[serde_as(as = "Option")] pub prev_record_lsn: Option, + #[serde_as(as = "DisplayFromStr")] pub disk_consistent_lsn: Lsn, pub current_logical_size: Option, // is None when timeline is Unloaded pub current_logical_size_non_incremental: Option, @@ -47,9 +54,7 @@ impl LocalTimelineInfo { ) -> anyhow::Result { let last_record_lsn = timeline.get_last_record_lsn(); let info = LocalTimelineInfo { - ancestor_timeline_id: timeline - .get_ancestor_timeline_id() - .map(HexZTimelineId::from), + ancestor_timeline_id: timeline.get_ancestor_timeline_id(), ancestor_lsn: { match timeline.get_ancestor_lsn() { Lsn(0) => None, @@ -72,7 +77,7 @@ impl LocalTimelineInfo { pub fn from_unloaded_timeline(metadata: &TimelineMetadata) -> Self { LocalTimelineInfo { - ancestor_timeline_id: metadata.ancestor_timeline().map(HexZTimelineId::from), + ancestor_timeline_id: metadata.ancestor_timeline(), ancestor_lsn: { match metadata.ancestor_lsn() { Lsn(0) => None, @@ -103,17 +108,20 @@ impl LocalTimelineInfo { } } +#[serde_as] #[derive(Debug, Serialize, Deserialize, Clone)] pub struct RemoteTimelineInfo { + #[serde_as(as = "Option")] pub remote_consistent_lsn: Option, pub awaits_download: bool, } +#[serde_as] #[derive(Debug, Serialize, Deserialize, Clone)] pub struct TimelineInfo { - #[serde(with = "hex")] + #[serde_as(as = "DisplayFromStr")] pub tenant_id: ZTenantId, - #[serde(with = "hex")] + #[serde_as(as = "DisplayFromStr")] pub timeline_id: ZTimelineId, pub local: Option, pub remote: Option, diff --git a/test_runner/batch_others/test_remote_storage.py b/test_runner/batch_others/test_remote_storage.py index 8689838089..07a122ede9 100644 --- a/test_runner/batch_others/test_remote_storage.py +++ b/test_runner/batch_others/test_remote_storage.py @@ -7,6 +7,7 @@ from pathlib import Path from uuid import UUID from fixtures.zenith_fixtures import ZenithEnvBuilder, assert_local, wait_for, wait_for_last_record_lsn, wait_for_upload from fixtures.log_helper import log +from fixtures.utils import lsn_from_hex import pytest @@ -56,7 +57,7 @@ def test_remote_storage_backup_and_restore(zenith_env_builder: ZenithEnvBuilder, INSERT INTO t1 VALUES ({data_id}, '{data_secret}'); ''') cur.execute("SELECT pg_current_wal_flush_lsn()") - current_lsn = int(cur.fetchone()[0].split('/')[1], base=16) + current_lsn = lsn_from_hex(cur.fetchone()[0]) # wait until pageserver receives that data wait_for_last_record_lsn(client, UUID(tenant_id), UUID(timeline_id), current_lsn) diff --git a/test_runner/batch_others/test_tenant_relocation.py b/test_runner/batch_others/test_tenant_relocation.py index e4492e5393..12ce3eb760 100644 --- a/test_runner/batch_others/test_tenant_relocation.py +++ b/test_runner/batch_others/test_tenant_relocation.py @@ -11,6 +11,7 @@ import signal import pytest from fixtures.zenith_fixtures import PgProtocol, PortDistributor, Postgres, ZenithEnvBuilder, ZenithPageserverHttpClient, assert_local, wait_for, wait_for_last_record_lsn, wait_for_upload, zenith_binpath, pg_distrib_dir +from fixtures.utils import lsn_from_hex def assert_abs_margin_ratio(a: float, b: float, margin_ratio: float): @@ -134,7 +135,7 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, assert cur.fetchone() == (500500, ) cur.execute("SELECT pg_current_wal_flush_lsn()") - current_lsn = int(cur.fetchone()[0].split('/')[1], base=16) + current_lsn = lsn_from_hex(cur.fetchone()[0]) pageserver_http = env.pageserver.http_client() @@ -189,8 +190,8 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, # when load is active these checks can break because lsns are not static # so lets check with some margin - assert_abs_margin_ratio(new_timeline_detail['local']['disk_consistent_lsn'], - timeline_detail['local']['disk_consistent_lsn'], + assert_abs_margin_ratio(lsn_from_hex(new_timeline_detail['local']['disk_consistent_lsn']), + lsn_from_hex(timeline_detail['local']['disk_consistent_lsn']), 0.03) # callmemaybe to start replication from safekeeper to the new pageserver diff --git a/test_runner/fixtures/zenith_fixtures.py b/test_runner/fixtures/zenith_fixtures.py index c44a6e431f..fa68c4f476 100644 --- a/test_runner/fixtures/zenith_fixtures.py +++ b/test_runner/fixtures/zenith_fixtures.py @@ -33,7 +33,7 @@ from typing_extensions import Literal import requests import backoff # type: ignore -from .utils import (get_self_dir, mkdir_if_needed, subprocess_capture) +from .utils import (get_self_dir, lsn_from_hex, mkdir_if_needed, subprocess_capture) from fixtures.log_helper import log """ This file contains pytest fixtures. A fixture is a test resource that can be @@ -1900,8 +1900,10 @@ def remote_consistent_lsn(pageserver_http_client: ZenithPageserverHttpClient, tenant: uuid.UUID, timeline: uuid.UUID) -> int: detail = pageserver_http_client.timeline_detail_v2(tenant, timeline) - assert isinstance(detail['remote']['remote_consistent_lsn'], int) - return detail['remote']['remote_consistent_lsn'] + + lsn_str = detail['remote']['remote_consistent_lsn'] + assert isinstance(lsn_str, str) + return lsn_from_hex(lsn_str) def wait_for_upload(pageserver_http_client: ZenithPageserverHttpClient, @@ -1917,8 +1919,10 @@ def last_record_lsn(pageserver_http_client: ZenithPageserverHttpClient, tenant: uuid.UUID, timeline: uuid.UUID) -> int: detail = pageserver_http_client.timeline_detail_v2(tenant, timeline) - assert isinstance(detail['local']['last_record_lsn'], int) - return detail['local']['last_record_lsn'] + + lsn_str = detail['local']['last_record_lsn'] + assert isinstance(lsn_str, str) + return lsn_from_hex(lsn_str) def wait_for_last_record_lsn(pageserver_http_client: ZenithPageserverHttpClient, diff --git a/zenith/src/main.rs b/zenith/src/main.rs index 389c394103..f5d4184e63 100644 --- a/zenith/src/main.rs +++ b/zenith/src/main.rs @@ -316,7 +316,7 @@ fn print_timelines_tree( timeline.local.as_ref().and_then(|l| l.ancestor_timeline_id) { timelines_hash - .get_mut(&ZTimelineId::from(ancestor_timeline_id)) + .get_mut(&ancestor_timeline_id) .context("missing timeline info in the HashMap")? .children .insert(timeline.timeline_id); @@ -437,8 +437,8 @@ fn get_timeline_infos( fn get_tenant_id(sub_match: &ArgMatches, env: &local_env::LocalEnv) -> anyhow::Result { if let Some(tenant_id_from_arguments) = parse_tenant_id(sub_match).transpose() { tenant_id_from_arguments - } else if let Some(tenantid_conf) = env.default_tenant_id { - Ok(ZTenantId::from(tenantid_conf)) + } else if let Some(default_id) = env.default_tenant_id { + Ok(default_id) } else { bail!("No tenant id. Use --tenant-id, or set 'default_tenant_id' in the config file"); } @@ -479,7 +479,7 @@ fn handle_init(init_match: &ArgMatches) -> Result { .context("Failed to initialize zenith repository")?; // default_tenantid was generated by the `env.init()` call above - let initial_tenant_id = ZTenantId::from(env.default_tenant_id.unwrap()); + let initial_tenant_id = env.default_tenant_id.unwrap(); // Call 'pageserver init'. let pageserver = PageServerNode::from_env(&env); diff --git a/zenith_utils/Cargo.toml b/zenith_utils/Cargo.toml index daaf345f8f..8e7f5f233c 100644 --- a/zenith_utils/Cargo.toml +++ b/zenith_utils/Cargo.toml @@ -27,6 +27,7 @@ hex = { version = "0.4.3", features = ["serde"] } rustls = "0.19.1" rustls-split = "0.2.1" git-version = "0.3.5" +serde_with = "1.12.0" zenith_metrics = { path = "../zenith_metrics" } workspace_hack = { path = "../workspace_hack" } diff --git a/zenith_utils/src/auth.rs b/zenith_utils/src/auth.rs index cbc4fcee61..8271121c63 100644 --- a/zenith_utils/src/auth.rs +++ b/zenith_utils/src/auth.rs @@ -14,8 +14,9 @@ use jsonwebtoken::{ decode, encode, Algorithm, DecodingKey, EncodingKey, Header, TokenData, Validation, }; use serde::{Deserialize, Serialize}; +use serde_with::{serde_as, DisplayFromStr}; -use crate::zid::{HexZTenantId, ZTenantId}; +use crate::zid::ZTenantId; const JWT_ALGORITHM: Algorithm = Algorithm::RS256; @@ -26,18 +27,18 @@ pub enum Scope { PageServerApi, } +#[serde_as] #[derive(Debug, Serialize, Deserialize, Clone)] pub struct Claims { - pub tenant_id: Option, + #[serde(default)] + #[serde_as(as = "Option")] + pub tenant_id: Option, pub scope: Scope, } impl Claims { pub fn new(tenant_id: Option, scope: Scope) -> Self { - Self { - tenant_id: tenant_id.map(HexZTenantId::from), - scope, - } + Self { tenant_id, scope } } } @@ -47,7 +48,7 @@ pub fn check_permission(claims: &Claims, tenantid: Option) -> Result< bail!("Attempt to access management api with tenant scope. Permission denied") } (Scope::Tenant, Some(tenantid)) => { - if ZTenantId::from(claims.tenant_id.unwrap()) != tenantid { + if claims.tenant_id.unwrap() != tenantid { bail!("Tenant id mismatch. Permission denied") } Ok(()) diff --git a/zenith_utils/src/zid.rs b/zenith_utils/src/zid.rs index e047e38da7..fce5ed97c1 100644 --- a/zenith_utils/src/zid.rs +++ b/zenith_utils/src/zid.rs @@ -2,100 +2,19 @@ use std::{fmt, str::FromStr}; use hex::FromHex; use rand::Rng; -use serde::{ - de::{self, Visitor}, - Deserialize, Serialize, -}; - -macro_rules! mutual_from { - ($id1:ident, $id2:ident) => { - impl From<$id1> for $id2 { - fn from(id1: $id1) -> Self { - Self(id1.0.into()) - } - } - - impl From<$id2> for $id1 { - fn from(id2: $id2) -> Self { - Self(id2.0.into()) - } - } - }; -} +use serde::{Deserialize, Serialize}; /// Zenith ID is a 128-bit random ID. /// Used to represent various identifiers. Provides handy utility methods and impls. /// /// NOTE: It (de)serializes as an array of hex bytes, so the string representation would look /// like `[173,80,132,115,129,226,72,254,170,201,135,108,199,26,228,24]`. -/// Use [`HexZId`] to serialize it as hex string instead: `ad50847381e248feaac9876cc71ae418`. +/// +/// Use `#[serde_as(as = "DisplayFromStr")]` to (de)serialize it as hex string instead: `ad50847381e248feaac9876cc71ae418`. +/// Check the `serde_with::serde_as` documentation for options for more complex types. #[derive(Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize, PartialOrd, Ord)] struct ZId([u8; 16]); -/// [`ZId`] version that serializes and deserializes as a hex string. -/// Useful for various json serializations, where hex byte array from original id is not convenient. -/// -/// Plain `ZId` could be (de)serialized into hex string with `#[serde(with = "hex")]` attribute. -/// This however won't work on nested types like `Option` or `Vec`, see https://github.com/serde-rs/serde/issues/723 for the details. -/// Every separate type currently needs a new (de)serializing method for every type separately. -/// -/// To provide a generic way to serialize the ZId as a hex string where `#[serde(with = "hex")]` is not enough, this wrapper is created. -/// The default wrapper serialization is left unchanged due to -/// * byte array (de)serialization being faster and simpler -/// * byte deserialization being used in Safekeeper already, with those bytes coming from compute (see `ProposerGreeting` in safekeeper) -/// * current `HexZId`'s deserialization impl breaks on compute byte array deserialization, having it by default is dangerous -#[derive(Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)] -struct HexZId([u8; 16]); - -impl Serialize for HexZId { - fn serialize(&self, ser: S) -> Result - where - S: serde::Serializer, - { - hex::encode(self.0).serialize(ser) - } -} - -impl<'de> Deserialize<'de> for HexZId { - fn deserialize(de: D) -> Result - where - D: serde::Deserializer<'de>, - { - de.deserialize_bytes(HexVisitor) - } -} - -struct HexVisitor; - -impl<'de> Visitor<'de> for HexVisitor { - type Value = HexZId; - - fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result { - write!( - f, - "A hexadecimal representation of a 128-bit random Zenith ID" - ) - } - - fn visit_bytes(self, hex_bytes: &[u8]) -> Result - where - E: de::Error, - { - ZId::from_hex(hex_bytes) - .map(HexZId::from) - .map_err(de::Error::custom) - } - - fn visit_str(self, hex_bytes_str: &str) -> Result - where - E: de::Error, - { - Self::visit_bytes(self, hex_bytes_str.as_bytes()) - } -} - -mutual_from!(ZId, HexZId); - impl ZId { pub fn get_from_buf(buf: &mut dyn bytes::Buf) -> ZId { let mut arr = [0u8; 16]; @@ -256,76 +175,22 @@ macro_rules! zid_newtype { /// /// NOTE: It (de)serializes as an array of hex bytes, so the string representation would look /// like `[173,80,132,115,129,226,72,254,170,201,135,108,199,26,228,24]`. -/// Use [`HexZTimelineId`] to serialize it as hex string instead: `ad50847381e248feaac9876cc71ae418`. +/// See [`ZId`] for alternative ways to serialize it. #[derive(Clone, Copy, PartialEq, Eq, Hash, Ord, PartialOrd, Serialize, Deserialize)] pub struct ZTimelineId(ZId); -/// A [`ZTimelineId`] version that gets (de)serialized as a hex string. -/// Use in complex types, where `#[serde(with = "hex")]` does not work. -/// See [`HexZId`] for more details. -#[derive(Clone, Copy, PartialEq, Eq, Hash, Ord, PartialOrd, Serialize, Deserialize)] -pub struct HexZTimelineId(HexZId); - -impl std::fmt::Debug for HexZTimelineId { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - ZTimelineId::from(*self).fmt(f) - } -} - -impl std::fmt::Display for HexZTimelineId { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - ZTimelineId::from(*self).fmt(f) - } -} - -impl FromStr for HexZTimelineId { - type Err = ::Err; - - fn from_str(s: &str) -> Result { - Ok(HexZTimelineId::from(ZTimelineId::from_str(s)?)) - } -} - zid_newtype!(ZTimelineId); -mutual_from!(ZTimelineId, HexZTimelineId); /// Zenith Tenant Id represents identifiar of a particular tenant. /// Is used for distinguishing requests and data belonging to different users. /// /// NOTE: It (de)serializes as an array of hex bytes, so the string representation would look /// like `[173,80,132,115,129,226,72,254,170,201,135,108,199,26,228,24]`. -/// Use [`HexZTenantId`] to serialize it as hex string instead: `ad50847381e248feaac9876cc71ae418`. +/// See [`ZId`] for alternative ways to serialize it. #[derive(Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize, PartialOrd, Ord)] pub struct ZTenantId(ZId); -/// A [`ZTenantId`] version that gets (de)serialized as a hex string. -/// Use in complex types, where `#[serde(with = "hex")]` does not work. -/// See [`HexZId`] for more details. -#[derive(Clone, Copy, PartialEq, Eq, Hash, Ord, PartialOrd, Serialize, Deserialize)] -pub struct HexZTenantId(HexZId); - -impl std::fmt::Debug for HexZTenantId { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - ZTenantId::from(*self).fmt(f) - } -} - -impl std::fmt::Display for HexZTenantId { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - ZTenantId::from(*self).fmt(f) - } -} - -impl FromStr for HexZTenantId { - type Err = ::Err; - - fn from_str(s: &str) -> Result { - Ok(HexZTenantId::from(ZTenantId::from_str(s)?)) - } -} - zid_newtype!(ZTenantId); -mutual_from!(ZTenantId, HexZTenantId); // A pair uniquely identifying Zenith instance. #[derive(Debug, Clone, Copy, PartialOrd, Ord, PartialEq, Eq, Hash)] @@ -368,55 +233,3 @@ impl fmt::Display for ZNodeId { write!(f, "{}", self.0) } } - -#[cfg(test)] -mod tests { - use std::fmt::Display; - - use super::*; - use hex::FromHexError; - use hex_literal::hex; - - #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)] - struct TestStruct + Display> { - field: Option, - } - - #[test] - fn test_hex_serializations_tenant_id() { - let original_struct = TestStruct { - field: Some(HexZTenantId::from(ZTenantId::from_array(hex!( - "11223344556677881122334455667788" - )))), - }; - - let serialized_string = serde_json::to_string(&original_struct).unwrap(); - assert_eq!( - serialized_string, - r#"{"field":"11223344556677881122334455667788"}"# - ); - - let deserialized_struct: TestStruct = - serde_json::from_str(&serialized_string).unwrap(); - assert_eq!(original_struct, deserialized_struct); - } - - #[test] - fn test_hex_serializations_timeline_id() { - let original_struct = TestStruct { - field: Some(HexZTimelineId::from(ZTimelineId::from_array(hex!( - "AA223344556677881122334455667788" - )))), - }; - - let serialized_string = serde_json::to_string(&original_struct).unwrap(); - assert_eq!( - serialized_string, - r#"{"field":"aa223344556677881122334455667788"}"# - ); - - let deserialized_struct: TestStruct = - serde_json::from_str(&serialized_string).unwrap(); - assert_eq!(original_struct, deserialized_struct); - } -} From 37ebbb598d625341db904e276d5ff5185ad311b2 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Tue, 15 Mar 2022 10:46:27 +0200 Subject: [PATCH 05/83] Add a macOs build --- .github/workflows/testing.yml | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml index 218783387b..27e2962712 100644 --- a/.github/workflows/testing.yml +++ b/.github/workflows/testing.yml @@ -13,7 +13,7 @@ jobs: # If we want to duplicate this job for different # Rust toolchains (e.g. nightly or 1.37.0), add them here. rust_toolchain: [stable] - os: [ubuntu-latest] + os: [ubuntu-latest, macos-latest] timeout-minutes: 30 name: run regression test suite runs-on: ${{ matrix.os }} @@ -32,11 +32,17 @@ jobs: toolchain: ${{ matrix.rust_toolchain }} override: true - - name: Install postgres dependencies + - name: Install Ubuntu postgres dependencies + if: matrix.os == 'ubuntu-latest' run: | sudo apt update sudo apt install build-essential libreadline-dev zlib1g-dev flex bison libseccomp-dev + - name: Install macOs postgres dependencies + if: matrix.os == 'macos-latest' + run: | + brew install flex bison + - name: Set pg revision for caching id: pg_ver run: echo ::set-output name=pg_rev::$(git rev-parse HEAD:vendor/postgres) From 77ed2a0fa039fcb20e2617a597b4db39ee20155a Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Thu, 17 Mar 2022 10:06:42 +0200 Subject: [PATCH 06/83] Run GitHub testing workflow on every push --- .github/workflows/testing.yml | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml index 27e2962712..83e46ce6be 100644 --- a/.github/workflows/testing.yml +++ b/.github/workflows/testing.yml @@ -1,10 +1,6 @@ name: Build and Test -on: - push: - branches: [ main ] - pull_request: - branches: [ main ] +on: push jobs: regression-check: From bd6bef468c2a619ac8c39c04355c517334847b24 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Sun, 20 Mar 2022 21:13:23 +0200 Subject: [PATCH 07/83] Provide single list timelines HTTP API handle --- pageserver/src/http/models.rs | 150 ------------------ pageserver/src/http/openapi_spec.yml | 33 +++- pageserver/src/http/routes.rs | 27 +--- .../batch_others/test_pageserver_api.py | 6 +- .../batch_others/test_tenant_relocation.py | 2 +- .../batch_others/test_timeline_size.py | 24 +-- test_runner/batch_others/test_wal_acceptor.py | 46 +++--- test_runner/fixtures/zenith_fixtures.py | 15 +- 8 files changed, 83 insertions(+), 220 deletions(-) diff --git a/pageserver/src/http/models.rs b/pageserver/src/http/models.rs index c28cd0def7..d1dfb911ba 100644 --- a/pageserver/src/http/models.rs +++ b/pageserver/src/http/models.rs @@ -5,8 +5,6 @@ use zenith_utils::{ zid::{ZNodeId, ZTenantId, ZTimelineId}, }; -use crate::timelines::{LocalTimelineInfo, TimelineInfo}; - #[serde_as] #[derive(Serialize, Deserialize)] pub struct TimelineCreateRequest { @@ -34,154 +32,6 @@ pub struct TenantCreateRequest { #[serde(transparent)] pub struct TenantCreateResponse(#[serde_as(as = "DisplayFromStr")] pub ZTenantId); -#[derive(Clone)] -pub enum TimelineInfoV1 { - Local { - timeline_id: ZTimelineId, - tenant_id: ZTenantId, - last_record_lsn: Lsn, - prev_record_lsn: Option, - ancestor_timeline_id: Option, - ancestor_lsn: Option, - disk_consistent_lsn: Lsn, - current_logical_size: Option, - current_logical_size_non_incremental: Option, - }, - Remote { - timeline_id: ZTimelineId, - tenant_id: ZTenantId, - disk_consistent_lsn: Lsn, - }, -} - -#[serde_as] -#[derive(Serialize, Deserialize)] -pub struct TimelineInfoResponseV1 { - pub kind: String, - #[serde_as(as = "DisplayFromStr")] - timeline_id: ZTimelineId, - #[serde_as(as = "DisplayFromStr")] - tenant_id: ZTenantId, - #[serde_as(as = "DisplayFromStr")] - disk_consistent_lsn: Lsn, - #[serde_as(as = "Option")] - last_record_lsn: Option, - #[serde_as(as = "Option")] - prev_record_lsn: Option, - #[serde_as(as = "Option")] - ancestor_timeline_id: Option, - #[serde_as(as = "Option")] - ancestor_lsn: Option, - current_logical_size: Option, - current_logical_size_non_incremental: Option, -} - -impl From for TimelineInfoResponseV1 { - fn from(other: TimelineInfoV1) -> Self { - match other { - TimelineInfoV1::Local { - timeline_id, - tenant_id, - last_record_lsn, - prev_record_lsn, - ancestor_timeline_id, - ancestor_lsn, - disk_consistent_lsn, - current_logical_size, - current_logical_size_non_incremental, - } => TimelineInfoResponseV1 { - kind: "Local".to_owned(), - timeline_id, - tenant_id, - disk_consistent_lsn, - last_record_lsn: Some(last_record_lsn), - prev_record_lsn, - ancestor_timeline_id, - ancestor_lsn, - current_logical_size, - current_logical_size_non_incremental, - }, - TimelineInfoV1::Remote { - timeline_id, - tenant_id, - disk_consistent_lsn, - } => TimelineInfoResponseV1 { - kind: "Remote".to_owned(), - timeline_id, - tenant_id, - disk_consistent_lsn, - last_record_lsn: None, - prev_record_lsn: None, - ancestor_timeline_id: None, - ancestor_lsn: None, - current_logical_size: None, - current_logical_size_non_incremental: None, - }, - } - } -} - -impl TryFrom for TimelineInfoV1 { - type Error = anyhow::Error; - - fn try_from(other: TimelineInfoResponseV1) -> anyhow::Result { - Ok(match other.kind.as_str() { - "Local" => TimelineInfoV1::Local { - timeline_id: other.timeline_id, - tenant_id: other.tenant_id, - last_record_lsn: other.last_record_lsn.ok_or(anyhow::anyhow!( - "Local timeline should have last_record_lsn" - ))?, - prev_record_lsn: other.prev_record_lsn, - ancestor_timeline_id: other.ancestor_timeline_id.map(ZTimelineId::from), - ancestor_lsn: other.ancestor_lsn, - disk_consistent_lsn: other.disk_consistent_lsn, - current_logical_size: other.current_logical_size, - current_logical_size_non_incremental: other.current_logical_size_non_incremental, - }, - "Remote" => TimelineInfoV1::Remote { - timeline_id: other.timeline_id, - tenant_id: other.tenant_id, - disk_consistent_lsn: other.disk_consistent_lsn, - }, - unknown => anyhow::bail!("Unknown timeline kind: {}", unknown), - }) - } -} - -fn from_local( - tenant_id: ZTenantId, - timeline_id: ZTimelineId, - local: &LocalTimelineInfo, -) -> TimelineInfoV1 { - TimelineInfoV1::Local { - timeline_id, - tenant_id, - last_record_lsn: local.last_record_lsn, - prev_record_lsn: local.prev_record_lsn, - ancestor_timeline_id: local.ancestor_timeline_id.map(ZTimelineId::from), - ancestor_lsn: local.ancestor_lsn, - disk_consistent_lsn: local.disk_consistent_lsn, - current_logical_size: local.current_logical_size, - current_logical_size_non_incremental: local.current_logical_size_non_incremental, - } -} - -impl From for TimelineInfoV1 { - fn from(t: TimelineInfo) -> Self { - match (t.local.as_ref(), t.remote.as_ref()) { - (None, None) => unreachable!(), - (None, Some(remote)) => TimelineInfoV1::Remote { - timeline_id: t.timeline_id, - tenant_id: t.tenant_id, - disk_consistent_lsn: remote.remote_consistent_lsn.unwrap_or(Lsn(0)), - }, - (Some(local), None) => from_local(t.tenant_id, t.timeline_id, local), - (Some(local), Some(_)) => from_local(t.tenant_id, t.timeline_id, local), - } - } -} - #[derive(Serialize)] pub struct StatusResponse { pub id: ZNodeId, diff --git a/pageserver/src/http/openapi_spec.yml b/pageserver/src/http/openapi_spec.yml index d322b051a6..a9101d4bd6 100644 --- a/pageserver/src/http/openapi_spec.yml +++ b/pageserver/src/http/openapi_spec.yml @@ -148,6 +148,7 @@ paths: format: hex ancestor_start_lsn: type: string + format: hex responses: "201": description: TimelineInfo @@ -289,7 +290,6 @@ components: required: - timeline_id - tenant_id - - disk_consistent_lsn properties: timeline_id: type: string @@ -297,17 +297,44 @@ components: tenant_id: type: string format: hex + local: + $ref: "#/components/schemas/LocalTimelineInfo" + remote: + $ref: "#/components/schemas/RemoteTimelineInfo" + RemoteTimelineInfo: + type: object + required: + - awaits_download + properties: + awaits_download: + type: boolean + remote_consistent_lsn: + type: string + format: hex + LocalTimelineInfo: + type: object + required: + - last_record_lsn + - disk_consistent_lsn + - timeline_state + properties: last_record_lsn: type: string - prev_record_lsn: + format: hex + disk_consistent_lsn: + type: string + format: hex + timeline_state: type: string ancestor_timeline_id: type: string format: hex ancestor_lsn: type: string - disk_consistent_lsn: + format: hex + prev_record_lsn: type: string + format: hex current_logical_size: type: integer current_logical_size_non_incremental: diff --git a/pageserver/src/http/routes.rs b/pageserver/src/http/routes.rs index a1249f463a..3ca8b6334a 100644 --- a/pageserver/src/http/routes.rs +++ b/pageserver/src/http/routes.rs @@ -21,7 +21,6 @@ use zenith_utils::zid::{ZTenantTimelineId, ZTimelineId}; use super::models::{ StatusResponse, TenantCreateRequest, TenantCreateResponse, TimelineCreateRequest, - TimelineInfoResponseV1, TimelineInfoV1, }; use crate::remote_storage::{schedule_timeline_download, RemoteTimelineIndex}; use crate::timelines::{ @@ -143,8 +142,7 @@ fn get_include_non_incremental_logical_size(request: &Request) -> bool { .unwrap_or(false) } -// common part for v1 and v2 handlers -async fn timeline_detail_common(request: Request) -> Result { +async fn timeline_detail_handler(request: Request) -> Result, ApiError> { let tenant_id: ZTenantId = parse_request_param(&request, "tenant_id")?; check_permission(&request, Some(tenant_id))?; @@ -192,25 +190,12 @@ async fn timeline_detail_common(request: Request) -> Result) -> Result, ApiError> { - let timeline_info = timeline_detail_common(request).await?; - Ok(json_response( - StatusCode::OK, - TimelineInfoResponseV1::from(TimelineInfoV1::from(timeline_info)), - )?) -} - -async fn timeline_detail_handler_v2(request: Request) -> Result, ApiError> { - let timeline_info = timeline_detail_common(request).await?; + }; Ok(json_response(StatusCode::OK, timeline_info)?) } @@ -347,11 +332,7 @@ pub fn make_router( .post("/v1/tenant/:tenant_id/timeline", timeline_create_handler) .get( "/v1/tenant/:tenant_id/timeline/:timeline_id", - timeline_detail_handler_v1, - ) - .get( - "/v2/tenant/:tenant_id/timeline/:timeline_id", - timeline_detail_handler_v2, + timeline_detail_handler, ) .post( "/v1/tenant/:tenant_id/timeline/:timeline_id/attach", diff --git a/test_runner/batch_others/test_pageserver_api.py b/test_runner/batch_others/test_pageserver_api.py index 2aa3686904..965ba9bcc3 100644 --- a/test_runner/batch_others/test_pageserver_api.py +++ b/test_runner/batch_others/test_pageserver_api.py @@ -39,10 +39,14 @@ def check_client(client: ZenithPageserverHttpClient, initial_tenant: UUID): timeline_id_str = str(timeline['timeline_id']) timeline_details = client.timeline_detail(tenant_id=tenant_id, timeline_id=UUID(timeline_id_str)) - assert timeline_details['kind'] == 'Local' + assert timeline_details['tenant_id'] == tenant_id.hex assert timeline_details['timeline_id'] == timeline_id_str + local_timeline_details = timeline_details.get('local') + assert local_timeline_details is not None + assert local_timeline_details['timeline_state'] == 'Loaded' + def test_pageserver_http_api_client(zenith_simple_env: ZenithEnv): env = zenith_simple_env diff --git a/test_runner/batch_others/test_tenant_relocation.py b/test_runner/batch_others/test_tenant_relocation.py index 12ce3eb760..32fbc8f872 100644 --- a/test_runner/batch_others/test_tenant_relocation.py +++ b/test_runner/batch_others/test_tenant_relocation.py @@ -141,7 +141,7 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, # wait until pageserver receives that data wait_for_last_record_lsn(pageserver_http, tenant, timeline, current_lsn) - timeline_detail = pageserver_http.timeline_detail_v2(tenant, timeline) + timeline_detail = assert_local(pageserver_http, tenant, timeline) if with_load == 'with_load': # create load table diff --git a/test_runner/batch_others/test_timeline_size.py b/test_runner/batch_others/test_timeline_size.py index 7d8ab551b0..0b341746ee 100644 --- a/test_runner/batch_others/test_timeline_size.py +++ b/test_runner/batch_others/test_timeline_size.py @@ -2,7 +2,7 @@ from contextlib import closing from uuid import UUID import psycopg2.extras import psycopg2.errors -from fixtures.zenith_fixtures import ZenithEnv, ZenithEnvBuilder, Postgres +from fixtures.zenith_fixtures import ZenithEnv, ZenithEnvBuilder, Postgres, assert_local from fixtures.log_helper import log import time @@ -13,8 +13,9 @@ def test_timeline_size(zenith_simple_env: ZenithEnv): new_timeline_id = env.zenith_cli.create_branch('test_timeline_size', 'empty') client = env.pageserver.http_client() - res = client.timeline_detail(tenant_id=env.initial_tenant, timeline_id=new_timeline_id) - assert res["current_logical_size"] == res["current_logical_size_non_incremental"] + timeline_details = assert_local(client, env.initial_tenant, new_timeline_id) + assert timeline_details['local']['current_logical_size'] == timeline_details['local'][ + 'current_logical_size_non_incremental'] pgmain = env.postgres.create_start("test_timeline_size") log.info("postgres is running on 'test_timeline_size' branch") @@ -31,12 +32,16 @@ def test_timeline_size(zenith_simple_env: ZenithEnv): FROM generate_series(1, 10) g """) - res = client.timeline_detail(tenant_id=env.initial_tenant, timeline_id=new_timeline_id) - assert res["current_logical_size"] == res["current_logical_size_non_incremental"] + res = assert_local(client, env.initial_tenant, new_timeline_id) + local_details = res['local'] + assert local_details["current_logical_size"] == local_details[ + "current_logical_size_non_incremental"] cur.execute("TRUNCATE foo") - res = client.timeline_detail(tenant_id=env.initial_tenant, timeline_id=new_timeline_id) - assert res["current_logical_size"] == res["current_logical_size_non_incremental"] + res = assert_local(client, env.initial_tenant, new_timeline_id) + local_details = res['local'] + assert local_details["current_logical_size"] == local_details[ + "current_logical_size_non_incremental"] # wait until received_lsn_lag is 0 @@ -71,8 +76,9 @@ def test_timeline_size_quota(zenith_env_builder: ZenithEnvBuilder): new_timeline_id = env.zenith_cli.create_branch('test_timeline_size_quota') client = env.pageserver.http_client() - res = client.timeline_detail(tenant_id=env.initial_tenant, timeline_id=new_timeline_id) - assert res["current_logical_size"] == res["current_logical_size_non_incremental"] + res = assert_local(client, env.initial_tenant, new_timeline_id) + assert res['local']["current_logical_size"] == res['local'][ + "current_logical_size_non_incremental"] pgmain = env.postgres.create_start( "test_timeline_size_quota", diff --git a/test_runner/batch_others/test_wal_acceptor.py b/test_runner/batch_others/test_wal_acceptor.py index bdc4c4f63c..37ce1a8bca 100644 --- a/test_runner/batch_others/test_wal_acceptor.py +++ b/test_runner/batch_others/test_wal_acceptor.py @@ -89,29 +89,33 @@ def test_many_timelines(zenith_env_builder: ZenithEnvBuilder): sk_metrics = [sk.http_client().get_metrics() for sk in env.safekeepers] timeline_metrics = [] - with env.pageserver.http_client() as pageserver_http: - for timeline_detail in timeline_details: - timeline_id: str = timeline_detail["timeline_id"] + for timeline_detail in timeline_details: + timeline_id: str = timeline_detail["timeline_id"] - m = TimelineMetrics( - timeline_id=timeline_id, - last_record_lsn=lsn_from_hex(timeline_detail["last_record_lsn"]), - ) - for sk_m in sk_metrics: - m.flush_lsns.append(sk_m.flush_lsn_inexact[(tenant_id.hex, timeline_id)]) - m.commit_lsns.append(sk_m.commit_lsn_inexact[(tenant_id.hex, timeline_id)]) + local_timeline_detail = timeline_detail.get('local') + if local_timeline_detail is None: + log.debug(f"Timeline {timeline_id} is not present locally, skipping") + continue - for flush_lsn, commit_lsn in zip(m.flush_lsns, m.commit_lsns): - # Invariant. May be < when transaction is in progress. - assert commit_lsn <= flush_lsn - # We only call collect_metrics() after a transaction is confirmed by - # the compute node, which only happens after a consensus of safekeepers - # has confirmed the transaction. We assume majority consensus here. - assert (2 * sum(m.last_record_lsn <= lsn - for lsn in m.flush_lsns) > zenith_env_builder.num_safekeepers) - assert (2 * sum(m.last_record_lsn <= lsn - for lsn in m.commit_lsns) > zenith_env_builder.num_safekeepers) - timeline_metrics.append(m) + m = TimelineMetrics( + timeline_id=timeline_id, + last_record_lsn=lsn_from_hex(local_timeline_detail['last_record_lsn']), + ) + for sk_m in sk_metrics: + m.flush_lsns.append(sk_m.flush_lsn_inexact[(tenant_id.hex, timeline_id)]) + m.commit_lsns.append(sk_m.commit_lsn_inexact[(tenant_id.hex, timeline_id)]) + + for flush_lsn, commit_lsn in zip(m.flush_lsns, m.commit_lsns): + # Invariant. May be < when transaction is in progress. + assert commit_lsn <= flush_lsn + # We only call collect_metrics() after a transaction is confirmed by + # the compute node, which only happens after a consensus of safekeepers + # has confirmed the transaction. We assume majority consensus here. + assert (2 * sum(m.last_record_lsn <= lsn + for lsn in m.flush_lsns) > zenith_env_builder.num_safekeepers) + assert (2 * sum(m.last_record_lsn <= lsn + for lsn in m.commit_lsns) > zenith_env_builder.num_safekeepers) + timeline_metrics.append(m) log.info(f"{message}: {timeline_metrics}") return timeline_metrics diff --git a/test_runner/fixtures/zenith_fixtures.py b/test_runner/fixtures/zenith_fixtures.py index fa68c4f476..08ac09ee4c 100644 --- a/test_runner/fixtures/zenith_fixtures.py +++ b/test_runner/fixtures/zenith_fixtures.py @@ -783,15 +783,6 @@ class ZenithPageserverHttpClient(requests.Session): assert isinstance(res_json, dict) return res_json - def timeline_detail_v2(self, tenant_id: uuid.UUID, timeline_id: uuid.UUID) -> Dict[Any, Any]: - res = self.get( - f"http://localhost:{self.port}/v2/tenant/{tenant_id.hex}/timeline/{timeline_id.hex}?include-non-incremental-logical-size=1" - ) - self.verbose_error(res) - res_json = res.json() - assert isinstance(res_json, dict) - return res_json - def get_metrics(self) -> str: res = self.get(f"http://localhost:{self.port}/metrics") self.verbose_error(res) @@ -1891,7 +1882,7 @@ def wait_for(number_of_iterations: int, interval: int, func): def assert_local(pageserver_http_client: ZenithPageserverHttpClient, tenant: uuid.UUID, timeline: uuid.UUID): - timeline_detail = pageserver_http_client.timeline_detail_v2(tenant, timeline) + timeline_detail = pageserver_http_client.timeline_detail(tenant, timeline) assert timeline_detail.get('local', {}).get("disk_consistent_lsn"), timeline_detail return timeline_detail @@ -1899,7 +1890,7 @@ def assert_local(pageserver_http_client: ZenithPageserverHttpClient, def remote_consistent_lsn(pageserver_http_client: ZenithPageserverHttpClient, tenant: uuid.UUID, timeline: uuid.UUID) -> int: - detail = pageserver_http_client.timeline_detail_v2(tenant, timeline) + detail = pageserver_http_client.timeline_detail(tenant, timeline) lsn_str = detail['remote']['remote_consistent_lsn'] assert isinstance(lsn_str, str) @@ -1918,7 +1909,7 @@ def wait_for_upload(pageserver_http_client: ZenithPageserverHttpClient, def last_record_lsn(pageserver_http_client: ZenithPageserverHttpClient, tenant: uuid.UUID, timeline: uuid.UUID) -> int: - detail = pageserver_http_client.timeline_detail_v2(tenant, timeline) + detail = pageserver_http_client.timeline_detail(tenant, timeline) lsn_str = detail['local']['last_record_lsn'] assert isinstance(lsn_str, str) From e13bdd77fe97e0c081218639ca55668aac23aeaa Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Mon, 21 Mar 2022 14:42:24 +0400 Subject: [PATCH 08/83] add safekepeers gossip annd storage messaging rfcs they were in prs during rfc repo import in addition to just import I've added sequence diagrams to storage messaging rfc --- docs/rfcs/014-safekeepers-gossip.md | 69 +++++++ docs/rfcs/015-storage-messaging.md | 295 ++++++++++++++++++++++++++++ 2 files changed, 364 insertions(+) create mode 100644 docs/rfcs/014-safekeepers-gossip.md create mode 100644 docs/rfcs/015-storage-messaging.md diff --git a/docs/rfcs/014-safekeepers-gossip.md b/docs/rfcs/014-safekeepers-gossip.md new file mode 100644 index 0000000000..3d6cc04b94 --- /dev/null +++ b/docs/rfcs/014-safekeepers-gossip.md @@ -0,0 +1,69 @@ +# Safekeeper gossip + +Extracted from this [PR](https://github.com/zenithdb/rfcs/pull/13) + +## Motivation + +In some situations, safekeeper (SK) needs coordination with other SK's that serve the same tenant: + +1. WAL deletion. SK needs to know what WAL was already safely replicated to delete it. Now we keep WAL indefinitely. +2. Deciding on who is sending WAL to the pageserver. Now sending SK crash may lead to a livelock where nobody sends WAL to the pageserver. +3. To enable SK to SK direct recovery without involving the compute + +## Summary + +Compute node has connection strings to each safekeeper. During each compute->safekeeper connection establishment, the compute node should pass down all that connection strings to each safekeeper. With that info, safekeepers may establish Postgres connections to each other and periodically send ping messages with LSN payload. + +## Components + +safekeeper, compute, compute<->safekeeper protocol, possibly console (group SK addresses) + +## Proposed implementation + +Each safekeeper can periodically ping all its peers and share connectivity and liveness info. If the ping was not receiver for, let's say, four ping periods, we may consider sending safekeeper as dead. That would mean some of the alive safekeepers should connect to the pageserver. One way to decide which one exactly: `make_connection = my_node_id == min(alive_nodes)` + +Since safekeepers are multi-tenant, we may establish either per-tenant physical connections or per-safekeeper ones. So it makes sense to group "logical" connections between corresponding tenants on different nodes into a single physical connection. That means that we should implement an interconnect thread that maintains physical connections and periodically broadcasts info about all tenants. + +Right now console may assign any 3 SK addresses to a given compute node. That may lead to a high number of gossip connections between SK's. Instead, we can assign safekeeper triples to the compute node. But if we want to "break"/" change" group by an ad-hoc action, we can do it. + +### Corner cases + +- Current safekeeper may be alive but may not have connectivity to the pageserver + + To address that, we need to gossip visibility info. Based on that info, we may define SK as alive only when it can connect to the pageserver. + +- Current safekeeper may be alive but may not have connectivity with the compute node. + + We may broadcast last_received_lsn and presence of compute connection and decide who is alive based on that. + +- It is tricky to decide when to shut down gossip connections because we need to be sure that pageserver got all the committed (in the distributed sense, so local SK info is not enough) records, and it may never lose them. It is not a strict requirement since `--sync-safekeepers` that happen before the compute start will allow the pageserver to consume missing WAL, but it is better to do that in the background. So the condition may look like that: `majority_max(flush_lsn) == pageserver_s3_lsn` Here we rely on the two facts: + - that `--sync-safekeepers` happened after the compute shutdown, and it advanced local commit_lsn's allowing pageserver to consume that WAL. + + - we wait for the `pageserver_s3_lsn` advancement to avoid pageserver's last_received_lsn/disk_consistent_lsn going backward due to the disk/hardware failure and subsequent S3 recovery + + If those conditions are not met, we will have some gossip activity (but that may be okay). + +## Pros/cons + +Pros: + +- distributed, does not introduce new services (like etcd), does not add console as a storage dependency +- lays the foundation for gossip-based recovery + +Cons: + +- Only compute knows a set of safekeepers, but they should communicate even without compute node. In case of safekeepers restart, we will lose that info and can't gossip anymore. Hence we can't trim some WAL tail until the compute node start. Also, it is ugly. + +- If the console assigns a random set of safekeepers to each Postgres, we may end up in a situation where each safekeeper needs to have a connection with all other safekeepers. We can group safekeepers into isolated triples in the console to avoid that. Then "mixing" would happen only if we do rebalancing. + +## Alternative implementation + +We can have a selected node (e.g., console) with everybody reporting to it. + +## Security implications + +We don't increase the attack surface here. Communication can happen in a private network that is not exposed to users. + +## Scalability implications + +The only thing that may grow as we grow the number of computes is the number of gossip connections. But if we group safekeepers and assign a compute node to the random SK triple, the number of connections would be constant. diff --git a/docs/rfcs/015-storage-messaging.md b/docs/rfcs/015-storage-messaging.md new file mode 100644 index 0000000000..47bc9eb89c --- /dev/null +++ b/docs/rfcs/015-storage-messaging.md @@ -0,0 +1,295 @@ +# Storage messaging + +Created on 19.01.22 + +Initially created [here](https://github.com/zenithdb/rfcs/pull/16) by @kelvich. + +That it is an alternative to (014-safekeeper-gossip)[] + +## Motivation + +As in 014-safekeeper-gossip we need to solve the following problems: + +* Trim WAL on safekeepers +* Decide on which SK should push WAL to the S3 +* Decide on which SK should forward WAL to the pageserver +* Decide on when to shut down SK<->pageserver connection + +This RFC suggests a more generic and hopefully more manageable way to address those problems. However, unlike 014-safekeeper-gossip, it does not bring us any closer to safekeeper-to-safekeeper recovery but rather unties two sets of different issues we previously wanted to solve with gossip. + +Also, with this approach, we would not need "call me maybe" anymore, and the pageserver will have all the data required to understand that it needs to reconnect to another safekeeper. + +## Summary + +Instead of p2p gossip, let's have a centralized broker where all the storage nodes report per-timeline state. Each storage node should have a `--broker-url=1.2.3.4` CLI param. + +Here I propose two ways to do that. After a lot of arguing with myself, I'm leaning towards the etcd approach. My arguments for it are in the pros/cons section. Both options require adding a Grpc client in our codebase either directly or as an etcd dependency. + +## Non-goals + +That RFC does *not* suggest moving the compute to pageserver and compute to safekeeper mappings out of the console. The console is still the only place in the cluster responsible for the persistency of that info. So I'm implying that each pageserver and safekeeper exactly knows what timelines he serves, as it currently is. We need some mechanism for a new pageserver to discover mapping info, but that is out of the scope of this RFC. + +## Impacted components + +pageserver, safekeeper +adds either etcd or console as a storage dependency + +## Possible implementation: custom message broker in the console + +We've decided to go with an etcd approach instead of the message broker. + +
+Original suggestion +
+We can add a Grpc service in the console that acts as a message broker since the console knows the addresses of all the components. The broker can ignore the payload and only redirect messages. So, for example, each safekeeper may send a message to the peering safekeepers or to the pageserver responsible for a given timeline. + +Message format could be `{sender, destination, payload}`. + +The destination is either: +1. `sk_#{tenant}_#{timeline}` -- to be broadcasted on all safekeepers, responsible for that timeline, or +2. `pserver_#{tenant}_#{timeline}` -- to be broadcasted on all pageservers, responsible for that timeline + +Sender is either: +1. `sk_#{sk_id}`, or +2. `pserver_#{pserver_id}` + +I can think of the following behavior to address our original problems: + +* WAL trimming + Each safekeeper periodically broadcasts `(write_lsn, commit_lsn)` to all peering (peering == responsible for that timeline) safekeepers + +* Decide on which SK should push WAL to the S3 + + Each safekeeper periodically broadcasts `i_am_alive_#{current_timestamp}` message to all peering safekeepers. That way, safekeepers may maintain the vector of alive peers (loose one, with false negatives). Alive safekeeper with the minimal id pushes data to S3. + +* Decide on which SK should forward WAL to the pageserver + + Each safekeeper periodically sends (write_lsn, commit_lsn, compute_connected) to the relevant pageservers. With that info, pageserver can maintain a view of the safekeepers state, connect to a random one, and detect the moments (e.g., one the safekeepers is not making progress or down) when it needs to reconnect to another safekeeper. Pageserver should resolve exact IP addresses through the console, e.g., exchange `#sk_#{sk_id}` to `4.5.6.7:6400`. + + Pageserver connection to the safekeeper triggered by the state change `compute_connected: false -> true`. With that, we don't need "call me maybe" anymore. + + Also, we don't have a "peer address amnesia" problem as in the gossip approach (with gossip, after a simultaneous reboot, safekeepers wouldn't know each other addresses until the next compute connection). + +* Decide on when to shutdown sk<->pageserver connection + + Again, pageserver would have all the info to understand when to shut down the safekeeper connection. + +### Scalability + +One node is enough (c) No, seriously, it is enough. + +### High Availability + +Broker lives in the console, so we can rely on k8s maintaining the console app alive. + +If the console is down, we won't trim WAL and reconnect the pageserver to another safekeeper. But, at the same, if the console is down, we already can't accept new compute connections and start stopped computes, so we are making things a bit worse, but not dramatically. + +### Interactions + +``` + .________________. +sk_1 <-> | | <-> pserver_1 +... | Console broker | ... +sk_n <-> |________________| <-> pserver_m +``` +
+ + +## Implementation: etcd state store + +Alternatively, we can set up `etcd` and maintain the following data structure in it: + +```ruby +"compute_#{tenant}_#{timeline}" => { + safekeepers => { + "sk_#{sk_id}" => { + write_lsn: "0/AEDF130", + commit_lsn: "0/AEDF100", + compute_connected: true, + last_updated: 1642621138, + }, + } +} +``` + +As etcd doesn't support field updates in the nested objects that translates to the following set of keys: + +```ruby +"compute_#{tenant}_#{timeline}/safekeepers/sk_#{sk_id}/write_lsn", +"compute_#{tenant}_#{timeline}/safekeepers/sk_#{sk_id}/commit_lsn", +... +``` + +Each storage node can subscribe to the relevant sets of keys and maintain a local view of that structure. So in terms of the data flow, everything is the same as in the previous approach. Still, we can avoid implementing the message broker and prevent runtime storage dependency on a console. + +### Safekeeper address discovery + +During the startup safekeeper should publish the address he is listening on as the part of `{"sk_#{sk_id}" => ip_address}`. Then the pageserver can resolve `sk_#{sk_id}` to the actual address. This way it would work both locally and in the cloud setup. Safekeeper should have `--advertised-address` CLI option so that we can listen on e.g. 0.0.0.0 but advertize something more useful. + +### Safekeeper behavior + +For each timeline safekeeper periodically broadcasts `compute_#{tenant}_#{timeline}/safekeepers/sk_#{sk_id}/*` fields. It subscribes to changes of `compute_#{tenant}_#{timeline}` -- that way safekeeper will have an information about peering safekeepers. +That amount of information is enough to properly trim WAL. To decide on who is pushing the data to S3 safekeeper may use etcd leases or broadcast a timestamp and hence track who is alive. + +### Pageserver behavior + +Pageserver subscribes to `compute_#{tenant}_#{timeline}` for each tenant it owns. With that info, pageserver can maintain a view of the safekeepers state, connect to a random one, and detect the moments (e.g., one the safekeepers is not making progress or down) when it needs to reconnect to another safekeeper. Pageserver should resolve exact IP addresses through the console, e.g., exchange `#sk_#{sk_id}` to `4.5.6.7:6400`. + +Pageserver connection to the safekeeper can be triggered by the state change `compute_connected: false -> true`. With that, we don't need "call me maybe" anymore. + +As an alternative to compute_connected, we can track timestamp of the latest message arrived to safekeeper from compute. Usually compute broadcasts KeepAlive to all safekeepers every second, so it'll be updated every second when connection is ok. Then the connection can be considered down when this timestamp isn't updated for a several seconds. + +This will help to faster detect issues with safekeeper (and switch to another) in the following cases: + + when compute failed but TCP connection stays alive until timeout (usually about a minute) + when safekeeper failed and didn't set compute_connected to false + +Another way to deal with [2] is to process (write_lsn, commit_lsn, compute_connected) as a KeepAlive on the pageserver side and detect issues when sk_id don't send anything for some time. This way is fully compliant to this RFC. + +Also, we don't have a "peer address amnesia" problem as in the gossip approach (with gossip, after a simultaneous reboot, safekeepers wouldn't know each other addresses until the next compute connection). + +### Interactions + +``` + .________________. +sk_1 <-> | | <-> pserver_1 +... | etcd | ... +sk_n <-> |________________| <-> pserver_m +``` + +### Sequence diagrams for different workflows + +#### Cluster startup + +```mermaid +sequenceDiagram + autonumber + participant C as Compute + participant SK1 + participant SK2 + participant SK3 + participant PS1 + participant PS2 + participant O as Orchestrator + participant M as Metadata Service + + PS1->>M: subscribe to updates to state of timeline N + C->>+SK1: WAL push + loop constantly update current lsns + SK1->>-M: I'm at lsn A + end + C->>+SK2: WAL push + loop constantly update current lsns + SK2->>-M: I'm at lsn B + end + C->>+SK3: WAL push + loop constantly update current lsns + SK3->>-M: I'm at lsn C + end + loop request pages + C->>+PS1: get_page@lsn + PS1->>-C: page image + end + M->>PS1: New compute appeared for timeline N. SK1 at A, SK2 at B, SK3 at C + note over PS1: Say SK1 at A=200, SK2 at B=150 SK3 at C=100
so connect to SK1 because it is the most up to date one + PS1->>SK1: start replication +``` + +#### Behavour of services during typical operations + +```mermaid +sequenceDiagram + autonumber + participant C as Compute + participant SK1 + participant SK2 + participant SK3 + participant PS1 + participant PS2 + participant O as Orchestrator + participant M as Metadata Service + + note over C,M: Scenario 1: Pageserver checkpoint + note over PS1: Upload data to S3 + PS1->>M: Update remote consistent lsn + M->>SK1: propagate remote consistent lsn update + note over SK1: truncate WAL up to remote consistent lsn + M->>SK2: propagate remote consistent lsn update + note over SK2: truncate WAL up to remote consistent lsn + M->>SK3: propagate remote consistent lsn update + note over SK3: truncate WAL up to remote consistent lsn + note over C,M: Scenario 2: SK1 finds itself lagging behind MAX(150 (SK2), 200 (SK2)) - 100 (SK1) > THRESHOLD + SK1->>SK2: Fetch WAL delta between 100 (SK1) and 200 (SK2) + note over C,M: Scenario 3: PS1 detects that SK1 is lagging behind: Connection from SK1 is broken or there is no messages from it in 30 seconds. + note over PS1: e.g. SK2 is at 150, SK3 is at 100, chose SK2 as a new replication source + PS1->>SK2: start replication +``` + +#### Behaviour during timeline relocation + +```mermaid +sequenceDiagram + autonumber + participant C as Compute + participant SK1 + participant SK2 + participant SK3 + participant PS1 + participant PS2 + participant O as Orchestrator + participant M as Metadata Service + + note over C,M: Timeline is being relocated from PS1 to PS2 + O->>+PS2: Attach timeline + PS2->>-O: 202 Accepted if timeline exists in S3 + note over PS2: Download timeline from S3 + note over O: Poll for timeline download (or subscribe to metadata service) + loop wait for attach to complete + O->>PS2: timeline detail should answer that timeline is ready + end + PS2->>M: Register downloaded timeline + PS2->>M: Get safekeepers for timeline, subscribe to changes + PS2->>SK1: Start replication to catch up + note over O: PS2 catched up, time to switch compute + O->>C: Restart compute with new pageserver url in config + note over C: Wal push is restarted + loop request pages + C->>+PS2: get_page@lsn + PS2->>-C: page image + end + O->>PS1: detach timeline + note over C,M: Scenario 1: Attach call failed + O--xPS2: Attach timeline + note over O: The operation can be safely retried,
if we hit some threshold we can try another pageserver + note over C,M: Scenario 2: Attach succeeded but pageserver failed to download the data or start replication + loop wait for attach to complete + O--xPS2: timeline detail should answer that timeline is ready + end + note over O: Can wait for a timeout, and then try another pageserver
there should be a limit on number of different pageservers to try + note over C,M: Scenario 3: Detach fails + O--xPS1: Detach timeline + note over O: can be retried, if continues to fail might lead to data duplication in s3 +``` + +# Pros/cons + +## Console broker/etcd vs gossip: + +Gossip pros: +* gossip allows running storage without the console or etcd + +Console broker/etcd pros: +* simpler +* solves "call me maybe" as well +* avoid possible N-to-N connection issues with gossip without grouping safekeepers in pre-defined triples + +## Console broker vs. etcd: + +Initially, I wanted to avoid etcd as a dependency mostly because I've seen how painful for Clickhouse was their ZooKeeper dependency: in each chat, at each conference, people were complaining about configuration and maintenance barriers with ZooKeeper. It was that bad that ClickHouse re-implemented ZooKeeper to embed it: https://clickhouse.com/docs/en/operations/clickhouse-keeper/. + +But with an etcd we are in a bit different situation: + +1. We don't need persistency and strong consistency guarantees for the data we store in the etcd +2. etcd uses Grpc as a protocol, and messages are pretty simple + +So it looks like implementing in-mem store with etcd interface is straightforward thing _if we will want that in future_. At the same time, we can avoid implementing it right now, and we will be able to run local zenith installation with etcd running somewhere in the background (as opposed to building and running console, which in turn requires Postgres). From a4d0d78e9ec82b3cc848f8b467b865b0507fcdad Mon Sep 17 00:00:00 2001 From: Andrey Taranik Date: Wed, 23 Mar 2022 13:39:55 +0300 Subject: [PATCH 09/83] s3 settings for pageserver (#1388) --- .circleci/ansible/deploy.yaml | 14 ++++++++++++++ .circleci/ansible/production.hosts | 2 +- .circleci/ansible/staging.hosts | 2 +- 3 files changed, 16 insertions(+), 2 deletions(-) diff --git a/.circleci/ansible/deploy.yaml b/.circleci/ansible/deploy.yaml index 2dd109f99a..2379ef8510 100644 --- a/.circleci/ansible/deploy.yaml +++ b/.circleci/ansible/deploy.yaml @@ -91,6 +91,20 @@ tags: - pageserver + - name: update config + when: current_version > remote_version or force_deploy + lineinfile: + path: /storage/pageserver/data/pageserver.toml + line: "{{ item }}" + loop: + - "[remote_storage]" + - "bucket_name = '{{ bucket_name }}'" + - "bucket_region = '{{ bucket_region }}'" + - "prefix_in_bucket = '{{ inventory_hostname }}'" + become: true + tags: + - pageserver + - name: upload systemd service definition when: current_version > remote_version or force_deploy ansible.builtin.template: diff --git a/.circleci/ansible/production.hosts b/.circleci/ansible/production.hosts index c5b4f664a6..3a0543f39a 100644 --- a/.circleci/ansible/production.hosts +++ b/.circleci/ansible/production.hosts @@ -1,5 +1,5 @@ [pageservers] -zenith-1-ps-1 +zenith-1-ps-1 bucket_name=zenith-storage-oregon bucket_region=us-west-2 [safekeepers] zenith-1-sk-1 diff --git a/.circleci/ansible/staging.hosts b/.circleci/ansible/staging.hosts index e625120bf3..2987e2c6fa 100644 --- a/.circleci/ansible/staging.hosts +++ b/.circleci/ansible/staging.hosts @@ -1,5 +1,5 @@ [pageservers] -zenith-us-stage-ps-1 +zenith-us-stage-ps-1 bucket_name=zenith-staging-storage-us-east-1 bucket_region=us-east-1 [safekeepers] zenith-us-stage-sk-1 From 15434ba7e0f870683abe83d3e9994f00e5599f3f Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Tue, 22 Mar 2022 13:05:14 +0200 Subject: [PATCH 10/83] Show cachepot build stats --- Dockerfile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Dockerfile b/Dockerfile index 9ee6abaa8a..3bc1039129 100644 --- a/Dockerfile +++ b/Dockerfile @@ -31,6 +31,8 @@ COPY --from=pg-build /pg/tmp_install/include/postgresql/server tmp_install/inclu COPY . . RUN cargo build --release +# Show build caching stats to check if it was used +RUN /usr/local/cargo/bin/cachepot -s # Build final image # From 123fcd5d0dbeb6712d51fbd574e0dc16a7cb853d Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Wed, 23 Mar 2022 09:08:56 +0200 Subject: [PATCH 11/83] Revert accidental bump of vendor/postgres submodule I accidentally bumped it in commit 3b069f5aef. It didn't seem to cause any harm, but it was not intentional. --- vendor/postgres | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/vendor/postgres b/vendor/postgres index 5e9bc37322..093aa160e5 160000 --- a/vendor/postgres +++ b/vendor/postgres @@ -1 +1 @@ -Subproject commit 5e9bc3732266c072151df20d6772b47ca51e233f +Subproject commit 093aa160e5df19814ff19b995d36dd5ee03c7f8b From e80ae4306aa009ce8154bf12269c49275551a582 Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Wed, 23 Mar 2022 16:47:05 +0400 Subject: [PATCH 12/83] change log level from info to debug for timeline gc messages --- pageserver/src/layered_repository.rs | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index c17df84689..64ac00ab56 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -1734,7 +1734,7 @@ impl LayeredTimeline { // 1. Is it newer than cutoff point? if l.get_end_lsn() > cutoff { - info!( + debug!( "keeping {} {}-{} because it's newer than cutoff {}", seg, l.get_start_lsn(), @@ -1757,7 +1757,7 @@ impl LayeredTimeline { for retain_lsn in &retain_lsns { // start_lsn is inclusive if &l.get_start_lsn() <= retain_lsn { - info!( + debug!( "keeping {} {}-{} because it's still might be referenced by child branch forked at {} is_dropped: {} is_incremental: {}", seg, l.get_start_lsn(), @@ -1783,7 +1783,7 @@ impl LayeredTimeline { disk_consistent_lsn, ) { - info!( + debug!( "keeping {} {}-{} because it is the latest layer", seg, l.get_start_lsn(), @@ -1806,7 +1806,7 @@ impl LayeredTimeline { // because LayerMap of this timeline is already locked. let mut is_tombstone = layers.layer_exists_at_lsn(l.get_seg_tag(), prior_lsn)?; if is_tombstone { - info!( + debug!( "earlier layer exists at {} in {}", prior_lsn, self.timelineid ); @@ -1819,7 +1819,7 @@ impl LayeredTimeline { { let prior_lsn = ancestor.get_last_record_lsn(); if seg.rel.is_blocky() { - info!( + debug!( "check blocky relish size {} at {} in {} for layer {}-{}", seg, prior_lsn, @@ -1831,7 +1831,7 @@ impl LayeredTimeline { Some(size) => { let (last_live_seg, _rel_blknum) = SegmentTag::from_blknum(seg.rel, size - 1); - info!( + debug!( "blocky rel size is {} last_live_seg.segno {} seg.segno {}", size, last_live_seg.segno, seg.segno ); @@ -1840,11 +1840,11 @@ impl LayeredTimeline { } } _ => { - info!("blocky rel doesn't exist"); + debug!("blocky rel doesn't exist"); } } } else { - info!( + debug!( "check non-blocky relish existence {} at {} in {} for layer {}-{}", seg, prior_lsn, @@ -1857,7 +1857,7 @@ impl LayeredTimeline { } if is_tombstone { - info!( + debug!( "keeping {} {}-{} because this layer serves as a tombstone for older layer", seg, l.get_start_lsn(), @@ -1874,7 +1874,7 @@ impl LayeredTimeline { } // We didn't find any reason to keep this file, so remove it. - info!( + debug!( "garbage collecting {} {}-{} is_dropped: {} is_incremental: {}", l.get_seg_tag(), l.get_start_lsn(), From 0be7ed0cb5c1ee0e52c67d28a2ebb3113b7d3c54 Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Wed, 23 Mar 2022 17:13:01 +0400 Subject: [PATCH 13/83] decrease log message severity for timeline checkpoint internals --- pageserver/src/layered_repository.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 64ac00ab56..2c4393481d 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -1529,7 +1529,7 @@ impl LayeredTimeline { && oldest_lsn >= freeze_end_lsn // this layer intersects with evicted layer and so also need to be evicted { - info!( + debug!( "the oldest layer is now {} which is {} bytes behind last_record_lsn", oldest_layer.filename().display(), distance From 8a86276a6ef6a8f79e11a264087e6f22790d67c5 Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Wed, 23 Mar 2022 17:40:29 +0400 Subject: [PATCH 14/83] add more context to error --- pageserver/src/remote_storage/storage_sync/upload.rs | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/pageserver/src/remote_storage/storage_sync/upload.rs b/pageserver/src/remote_storage/storage_sync/upload.rs index 8fdd91dd18..431b5ec484 100644 --- a/pageserver/src/remote_storage/storage_sync/upload.rs +++ b/pageserver/src/remote_storage/storage_sync/upload.rs @@ -182,7 +182,13 @@ async fn try_upload_checkpoint< } }) .collect::>(); - ensure!(!files_to_upload.is_empty(), "No files to upload"); + + ensure!( + !files_to_upload.is_empty(), + "No files to upload. Upload request was: {:?}, already uploaded files: {:?}", + new_checkpoint.layers, + files_to_skip, + ); compression::archive_files_as_stream( &timeline_dir, From 8b8d78a3a01fddcd0ba3e6ad5af782f4a147e26f Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Wed, 23 Mar 2022 19:13:44 +0400 Subject: [PATCH 15/83] use main branch of our bookfile crate --- Cargo.lock | 2 +- pageserver/Cargo.toml | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index a9de71420b..923f14e06e 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -246,7 +246,7 @@ dependencies = [ [[package]] name = "bookfile" version = "0.3.0" -source = "git+https://github.com/zenithdb/bookfile.git?branch=generic-readext#d51a99c7a0be48c3d9cc7cb85c9b7fb05ce1100c" +source = "git+https://github.com/zenithdb/bookfile.git?rev=bf6e43825dfb6e749ae9b80e8372c8fea76cec2f#bf6e43825dfb6e749ae9b80e8372c8fea76cec2f" dependencies = [ "aversion", "byteorder", diff --git a/pageserver/Cargo.toml b/pageserver/Cargo.toml index efd2fa4a38..46e6e2a8f1 100644 --- a/pageserver/Cargo.toml +++ b/pageserver/Cargo.toml @@ -4,7 +4,7 @@ version = "0.1.0" edition = "2021" [dependencies] -bookfile = { git = "https://github.com/zenithdb/bookfile.git", branch="generic-readext" } +bookfile = { git = "https://github.com/zenithdb/bookfile.git", rev="bf6e43825dfb6e749ae9b80e8372c8fea76cec2f" } chrono = "0.4.19" rand = "0.8.3" regex = "1.4.5" From 8437fc056e9c95c3a925df4dd4317f4454b8198c Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Wed, 23 Mar 2022 22:03:12 +0400 Subject: [PATCH 16/83] some follow ups after s3 integration was enabled on staging * do not error out when upload file list is empty * ignore ephemeral files during sync initialization --- pageserver/src/layered_repository.rs | 2 +- pageserver/src/remote_storage.rs | 8 ++++- .../src/remote_storage/storage_sync/upload.rs | 29 ++++++++++--------- 3 files changed, 24 insertions(+), 15 deletions(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 2c4393481d..9cb0a17e66 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -54,7 +54,7 @@ use zenith_utils::lsn::{AtomicLsn, Lsn, RecordLsn}; use zenith_utils::seqwait::SeqWait; mod delta_layer; -mod ephemeral_file; +pub(crate) mod ephemeral_file; mod filename; mod global_layer_map; mod image_layer; diff --git a/pageserver/src/remote_storage.rs b/pageserver/src/remote_storage.rs index 08fb16a679..6eb7bd910b 100644 --- a/pageserver/src/remote_storage.rs +++ b/pageserver/src/remote_storage.rs @@ -94,12 +94,13 @@ use std::{ use anyhow::{bail, Context}; use tokio::{io, sync::RwLock}; -use tracing::{error, info}; +use tracing::{debug, error, info}; use zenith_utils::zid::{ZTenantId, ZTenantTimelineId, ZTimelineId}; pub use self::storage_sync::index::{RemoteTimelineIndex, TimelineIndexEntry}; pub use self::storage_sync::{schedule_timeline_checkpoint_upload, schedule_timeline_download}; use self::{local_fs::LocalFs, rust_s3::S3}; +use crate::layered_repository::ephemeral_file::is_ephemeral_file; use crate::{ config::{PageServerConf, RemoteStorageKind}, layered_repository::metadata::{TimelineMetadata, METADATA_FILE_NAME}, @@ -261,6 +262,8 @@ fn collect_timelines_for_tenant( Ok(timelines) } +// discover timeline files and extract timeline metadata +// NOTE: ephemeral files are excluded from the list fn collect_timeline_files( timeline_dir: &Path, ) -> anyhow::Result<(ZTimelineId, TimelineMetadata, Vec)> { @@ -280,6 +283,9 @@ fn collect_timeline_files( if entry_path.is_file() { if entry_path.file_name().and_then(ffi::OsStr::to_str) == Some(METADATA_FILE_NAME) { timeline_metadata_path = Some(entry_path); + } else if is_ephemeral_file(&entry_path.file_name().unwrap().to_string_lossy()) { + debug!("skipping ephemeral file {}", entry_path.display()); + continue; } else { timeline_files.push(entry_path); } diff --git a/pageserver/src/remote_storage/storage_sync/upload.rs b/pageserver/src/remote_storage/storage_sync/upload.rs index 431b5ec484..dfc4433694 100644 --- a/pageserver/src/remote_storage/storage_sync/upload.rs +++ b/pageserver/src/remote_storage/storage_sync/upload.rs @@ -2,7 +2,6 @@ use std::{borrow::Cow, collections::BTreeSet, path::PathBuf, sync::Arc}; -use anyhow::ensure; use tokio::sync::RwLock; use tracing::{debug, error, warn}; @@ -95,7 +94,7 @@ pub(super) async fn upload_timeline_checkpoint< ) .await { - Ok((archive_header, header_size)) => { + Some(Ok((archive_header, header_size))) => { let mut index_write = index.write().await; match index_write .timeline_entry_mut(&sync_id) @@ -136,7 +135,7 @@ pub(super) async fn upload_timeline_checkpoint< debug!("Checkpoint uploaded successfully"); Some(true) } - Err(e) => { + Some(Err(e)) => { error!( "Failed to upload checkpoint: {:?}, requeueing the upload", e @@ -148,6 +147,7 @@ pub(super) async fn upload_timeline_checkpoint< )); Some(false) } + None => Some(true), } } @@ -160,7 +160,7 @@ async fn try_upload_checkpoint< sync_id: ZTenantTimelineId, new_checkpoint: &NewCheckpoint, files_to_skip: BTreeSet, -) -> anyhow::Result<(ArchiveHeader, u64)> { +) -> Option> { let ZTenantTimelineId { tenant_id, timeline_id, @@ -172,7 +172,7 @@ async fn try_upload_checkpoint< .iter() .filter(|&path_to_upload| { if files_to_skip.contains(path_to_upload) { - error!( + warn!( "Skipping file upload '{}', since it was already uploaded", path_to_upload.display() ); @@ -183,14 +183,15 @@ async fn try_upload_checkpoint< }) .collect::>(); - ensure!( - !files_to_upload.is_empty(), - "No files to upload. Upload request was: {:?}, already uploaded files: {:?}", - new_checkpoint.layers, - files_to_skip, - ); + if files_to_upload.is_empty() { + warn!( + "No files to upload. Upload request was: {:?}, already uploaded files: {:?}", + new_checkpoint.layers, files_to_skip + ); + return None; + } - compression::archive_files_as_stream( + let upload_result = compression::archive_files_as_stream( &timeline_dir, files_to_upload.into_iter(), &new_checkpoint.metadata, @@ -206,7 +207,9 @@ async fn try_upload_checkpoint< }, ) .await - .map(|(header, header_size, _)| (header, header_size)) + .map(|(header, header_size, _)| (header, header_size)); + + Some(upload_result) } #[cfg(test)] From c7188705173e41ac742dd9738b5a99699552a8eb Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Thu, 24 Mar 2022 09:46:07 +0200 Subject: [PATCH 17/83] Tiny refactoring of page_cache::init function. The init function only needs the 'page_cache_size' from the config, so seems slightly nicer to pass just that. --- pageserver/src/bin/pageserver.rs | 3 +-- pageserver/src/page_cache.rs | 9 +++------ 2 files changed, 4 insertions(+), 8 deletions(-) diff --git a/pageserver/src/bin/pageserver.rs b/pageserver/src/bin/pageserver.rs index 05fb14daca..a2564d51d7 100644 --- a/pageserver/src/bin/pageserver.rs +++ b/pageserver/src/bin/pageserver.rs @@ -163,8 +163,7 @@ fn main() -> Result<()> { // Basic initialization of things that don't change after startup virtual_file::init(conf.max_file_descriptors); - - page_cache::init(conf); + page_cache::init(conf.page_cache_size); // Create repo and exit if init was requested if init { diff --git a/pageserver/src/page_cache.rs b/pageserver/src/page_cache.rs index b0c8d3a5d7..2992d9477b 100644 --- a/pageserver/src/page_cache.rs +++ b/pageserver/src/page_cache.rs @@ -53,7 +53,7 @@ use zenith_utils::{ }; use crate::layered_repository::writeback_ephemeral_file; -use crate::{config::PageServerConf, relish::RelTag}; +use crate::relish::RelTag; static PAGE_CACHE: OnceCell = OnceCell::new(); const TEST_PAGE_CACHE_SIZE: usize = 10; @@ -61,11 +61,8 @@ const TEST_PAGE_CACHE_SIZE: usize = 10; /// /// Initialize the page cache. This must be called once at page server startup. /// -pub fn init(conf: &'static PageServerConf) { - if PAGE_CACHE - .set(PageCache::new(conf.page_cache_size)) - .is_err() - { +pub fn init(size: usize) { + if PAGE_CACHE.set(PageCache::new(size)).is_err() { panic!("page cache already initialized"); } } From d3a9cb44a659b11d0df7f7e2fbded9e388fbe917 Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Thu, 24 Mar 2022 02:05:35 +0400 Subject: [PATCH 18/83] tweak timeouts for tenant relocation test --- test_runner/batch_others/test_tenant_relocation.py | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/test_runner/batch_others/test_tenant_relocation.py b/test_runner/batch_others/test_tenant_relocation.py index 32fbc8f872..8213d2526b 100644 --- a/test_runner/batch_others/test_tenant_relocation.py +++ b/test_runner/batch_others/test_tenant_relocation.py @@ -3,10 +3,8 @@ import os import pathlib import subprocess import threading -from typing import Dict from uuid import UUID from fixtures.log_helper import log -import time import signal import pytest @@ -15,7 +13,6 @@ from fixtures.utils import lsn_from_hex def assert_abs_margin_ratio(a: float, b: float, margin_ratio: float): - print("!" * 100, abs(a - b) / a) assert abs(a - b) / a < margin_ratio, abs(a - b) / a @@ -235,10 +232,10 @@ def test_tenant_relocation(zenith_env_builder: ZenithEnvBuilder, assert cur.fetchone() == (2001000, ) if with_load == 'with_load': - assert load_ok_event.wait(1) + assert load_ok_event.wait(3) log.info('stopping load thread') load_stop_event.set() - load_thread.join() + load_thread.join(timeout=10) log.info('load thread stopped') # bring old pageserver back for clean shutdown via zenith cli From b9a1a75b0d21fee7818777f91d2f297273d9d631 Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Thu, 24 Mar 2022 11:48:50 +0400 Subject: [PATCH 19/83] clean up unused imports in python tests --- test_runner/batch_others/test_gc_aggressive.py | 7 ++----- test_runner/batch_others/test_next_xid.py | 3 --- test_runner/batch_others/test_old_request_lsn.py | 2 -- test_runner/batch_others/test_pageserver_api.py | 2 +- test_runner/batch_others/test_pageserver_catchup.py | 7 ------- test_runner/batch_others/test_pageserver_restart.py | 6 ------ test_runner/batch_others/test_remote_storage.py | 2 +- test_runner/batch_others/test_snapfiles_gc.py | 1 - test_runner/batch_others/test_timeline_size.py | 1 - test_runner/batch_others/test_zenith_cli.py | 2 -- 10 files changed, 4 insertions(+), 29 deletions(-) diff --git a/test_runner/batch_others/test_gc_aggressive.py b/test_runner/batch_others/test_gc_aggressive.py index 9de6ba9f59..e4e4aa9f4a 100644 --- a/test_runner/batch_others/test_gc_aggressive.py +++ b/test_runner/batch_others/test_gc_aggressive.py @@ -1,10 +1,7 @@ -from contextlib import closing - import asyncio -import asyncpg import random -from fixtures.zenith_fixtures import ZenithEnv, Postgres, Safekeeper +from fixtures.zenith_fixtures import ZenithEnv, Postgres from fixtures.log_helper import log # Test configuration @@ -76,5 +73,5 @@ def test_gc_aggressive(zenith_simple_env: ZenithEnv): asyncio.run(update_and_gc(env, pg, timeline)) - row = cur.execute('SELECT COUNT(*), SUM(counter) FROM foo') + cur.execute('SELECT COUNT(*), SUM(counter) FROM foo') assert cur.fetchone() == (num_rows, updates_to_perform) diff --git a/test_runner/batch_others/test_next_xid.py b/test_runner/batch_others/test_next_xid.py index fd0f761409..03c27bcd70 100644 --- a/test_runner/batch_others/test_next_xid.py +++ b/test_runner/batch_others/test_next_xid.py @@ -1,9 +1,6 @@ -import pytest -import random import time from fixtures.zenith_fixtures import ZenithEnvBuilder -from fixtures.log_helper import log # Test restarting page server, while safekeeper and compute node keep diff --git a/test_runner/batch_others/test_old_request_lsn.py b/test_runner/batch_others/test_old_request_lsn.py index d09fb24913..e7400cff96 100644 --- a/test_runner/batch_others/test_old_request_lsn.py +++ b/test_runner/batch_others/test_old_request_lsn.py @@ -1,5 +1,3 @@ -from contextlib import closing - from fixtures.zenith_fixtures import ZenithEnv from fixtures.log_helper import log diff --git a/test_runner/batch_others/test_pageserver_api.py b/test_runner/batch_others/test_pageserver_api.py index 965ba9bcc3..13f6ef358e 100644 --- a/test_runner/batch_others/test_pageserver_api.py +++ b/test_runner/batch_others/test_pageserver_api.py @@ -1,6 +1,6 @@ from uuid import uuid4, UUID import pytest -from fixtures.zenith_fixtures import ZenithEnv, ZenithEnvBuilder, ZenithPageserverHttpClient, zenith_binpath +from fixtures.zenith_fixtures import ZenithEnv, ZenithEnvBuilder, ZenithPageserverHttpClient # test that we cannot override node id diff --git a/test_runner/batch_others/test_pageserver_catchup.py b/test_runner/batch_others/test_pageserver_catchup.py index 7093a1bdb3..3c4b7f9569 100644 --- a/test_runner/batch_others/test_pageserver_catchup.py +++ b/test_runner/batch_others/test_pageserver_catchup.py @@ -1,11 +1,4 @@ -import pytest -import random -import time - -from contextlib import closing -from multiprocessing import Process, Value from fixtures.zenith_fixtures import ZenithEnvBuilder -from fixtures.log_helper import log # Test safekeeper sync and pageserver catch up diff --git a/test_runner/batch_others/test_pageserver_restart.py b/test_runner/batch_others/test_pageserver_restart.py index 57f9db8f96..20e6f4467e 100644 --- a/test_runner/batch_others/test_pageserver_restart.py +++ b/test_runner/batch_others/test_pageserver_restart.py @@ -1,9 +1,3 @@ -import pytest -import random -import time - -from contextlib import closing -from multiprocessing import Process, Value from fixtures.zenith_fixtures import ZenithEnvBuilder from fixtures.log_helper import log diff --git a/test_runner/batch_others/test_remote_storage.py b/test_runner/batch_others/test_remote_storage.py index 07a122ede9..e762f8589a 100644 --- a/test_runner/batch_others/test_remote_storage.py +++ b/test_runner/batch_others/test_remote_storage.py @@ -1,7 +1,7 @@ # It's possible to run any regular test with the local fs remote storage via # env ZENITH_PAGESERVER_OVERRIDES="remote_storage={local_path='/tmp/zenith_zzz/'}" poetry ...... -import time, shutil, os +import shutil, os from contextlib import closing from pathlib import Path from uuid import UUID diff --git a/test_runner/batch_others/test_snapfiles_gc.py b/test_runner/batch_others/test_snapfiles_gc.py index c6d4512bc9..d00af53864 100644 --- a/test_runner/batch_others/test_snapfiles_gc.py +++ b/test_runner/batch_others/test_snapfiles_gc.py @@ -1,6 +1,5 @@ from contextlib import closing import psycopg2.extras -import time from fixtures.utils import print_gc_result from fixtures.zenith_fixtures import ZenithEnv from fixtures.log_helper import log diff --git a/test_runner/batch_others/test_timeline_size.py b/test_runner/batch_others/test_timeline_size.py index 0b341746ee..db33493d61 100644 --- a/test_runner/batch_others/test_timeline_size.py +++ b/test_runner/batch_others/test_timeline_size.py @@ -1,5 +1,4 @@ from contextlib import closing -from uuid import UUID import psycopg2.extras import psycopg2.errors from fixtures.zenith_fixtures import ZenithEnv, ZenithEnvBuilder, Postgres, assert_local diff --git a/test_runner/batch_others/test_zenith_cli.py b/test_runner/batch_others/test_zenith_cli.py index 4a62a1430a..091d9ac8ba 100644 --- a/test_runner/batch_others/test_zenith_cli.py +++ b/test_runner/batch_others/test_zenith_cli.py @@ -1,8 +1,6 @@ -import json import uuid import requests -from psycopg2.extensions import cursor as PgCursor from fixtures.zenith_fixtures import ZenithEnv, ZenithEnvBuilder, ZenithPageserverHttpClient from typing import cast From 825d3631707016717f05ae5bcb7c112af9feba8f Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Thu, 24 Mar 2022 12:17:56 +0200 Subject: [PATCH 20/83] Remove some unnecessary Ord etc. trait implementations. It doesn't make much sense to compare TimelineMetadata structs with < or >. But we depended on that in the remote storage upload code, so replace BTreeSets with Vecs there. --- pageserver/src/layered_repository/metadata.rs | 2 +- pageserver/src/remote_storage/storage_sync.rs | 18 +++++++++--------- 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/pageserver/src/layered_repository/metadata.rs b/pageserver/src/layered_repository/metadata.rs index 960a1b7fe3..99d786c4cd 100644 --- a/pageserver/src/layered_repository/metadata.rs +++ b/pageserver/src/layered_repository/metadata.rs @@ -28,7 +28,7 @@ pub const METADATA_FILE_NAME: &str = "metadata"; /// Metadata stored on disk for each timeline /// /// The fields correspond to the values we hold in memory, in LayeredTimeline. -#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)] +#[derive(Debug, Clone, PartialEq, Eq)] pub struct TimelineMetadata { disk_consistent_lsn: Lsn, // This is only set if we know it. We track it in memory when the page diff --git a/pageserver/src/remote_storage/storage_sync.rs b/pageserver/src/remote_storage/storage_sync.rs index f1483375cb..4ad28e6f8f 100644 --- a/pageserver/src/remote_storage/storage_sync.rs +++ b/pageserver/src/remote_storage/storage_sync.rs @@ -142,7 +142,7 @@ lazy_static! { /// mpsc approach was picked to allow blocking the sync loop if no tasks are present, to avoid meaningless spinning. mod sync_queue { use std::{ - collections::{BTreeSet, HashMap}, + collections::HashMap, sync::atomic::{AtomicUsize, Ordering}, }; @@ -205,9 +205,9 @@ mod sync_queue { pub async fn next_task_batch( receiver: &mut UnboundedReceiver, mut max_batch_size: usize, - ) -> BTreeSet { + ) -> Vec { if max_batch_size == 0 { - return BTreeSet::new(); + return Vec::new(); } let mut tasks = HashMap::with_capacity(max_batch_size); @@ -244,7 +244,7 @@ mod sync_queue { /// A task to run in the async download/upload loop. /// Limited by the number of retries, after certain threshold the failing task gets evicted and the timeline disabled. -#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)] +#[derive(Debug, Clone)] pub struct SyncTask { sync_id: ZTenantTimelineId, retries: u32, @@ -261,7 +261,7 @@ impl SyncTask { } } -#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)] +#[derive(Debug, Clone)] enum SyncKind { /// A certain amount of images (archive files) to download. Download(TimelineDownload), @@ -281,7 +281,7 @@ impl SyncKind { /// Local timeline files for upload, appeared after the new checkpoint. /// Current checkpoint design assumes new files are added only, no deletions or amendment happens. -#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)] +#[derive(Debug, Clone)] pub struct NewCheckpoint { /// Relish file paths in the pageserver workdir, that were added for the corresponding checkpoint. layers: Vec, @@ -289,7 +289,7 @@ pub struct NewCheckpoint { } /// Info about the remote image files. -#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)] +#[derive(Debug, Clone)] struct TimelineDownload { files_to_skip: Arc>, archives_to_skip: BTreeSet, @@ -485,11 +485,11 @@ async fn loop_step< max_sync_errors: NonZeroU32, ) -> HashMap> { let max_concurrent_sync = max_concurrent_sync.get(); - let mut next_tasks = BTreeSet::new(); + let mut next_tasks = Vec::new(); // request the first task in blocking fashion to do less meaningless work if let Some(first_task) = sync_queue::next_task(receiver).await { - next_tasks.insert(first_task); + next_tasks.push(first_task); } else { debug!("Shutdown requested, stopping"); return HashMap::new(); From a201d33edceacf8c1687f4dce9e94230f25be064 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Thu, 24 Mar 2022 13:27:14 +0200 Subject: [PATCH 21/83] Properly print cachepot stats --- Dockerfile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/Dockerfile b/Dockerfile index 3bc1039129..5e55cd834f 100644 --- a/Dockerfile +++ b/Dockerfile @@ -30,9 +30,9 @@ ENV RUSTC_WRAPPER /usr/local/cargo/bin/cachepot COPY --from=pg-build /pg/tmp_install/include/postgresql/server tmp_install/include/postgresql/server COPY . . -RUN cargo build --release -# Show build caching stats to check if it was used -RUN /usr/local/cargo/bin/cachepot -s +# Show build caching stats to check if it was used in the end. +# Has to be the part of the same RUN since cachepot daemon is killed in the end of this RUN, loosing the compilation stats. +RUN cargo build --release && /usr/local/cargo/bin/cachepot -s # Build final image # From edc7bebcb5a452ad84c5c3cfd46b727c6e6f1c48 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Thu, 17 Mar 2022 18:52:27 +0200 Subject: [PATCH 22/83] Remove obvious panic sources --- pageserver/src/basebackup.rs | 21 +++++----- pageserver/src/bin/pageserver.rs | 8 ++-- pageserver/src/import_datadir.rs | 21 +++++----- pageserver/src/layered_repository.rs | 21 ++++++---- .../src/layered_repository/inmemory_layer.rs | 10 ++--- pageserver/src/page_cache.rs | 7 ++-- pageserver/src/page_service.rs | 1 - pageserver/src/tenant_threads.rs | 2 +- pageserver/src/thread_mgr.rs | 2 +- pageserver/src/timelines.rs | 6 +-- pageserver/src/virtual_file.rs | 3 +- pageserver/src/walingest.rs | 2 +- pageserver/src/walredo.rs | 42 ++++++++++++------- 13 files changed, 84 insertions(+), 62 deletions(-) diff --git a/pageserver/src/basebackup.rs b/pageserver/src/basebackup.rs index 1ee48eb2fc..c316fc43d1 100644 --- a/pageserver/src/basebackup.rs +++ b/pageserver/src/basebackup.rs @@ -145,16 +145,17 @@ impl<'a> Basebackup<'a> { .timeline .get_relish_size(RelishTag::Slru { slru, segno }, self.lsn)?; - if seg_size == None { - trace!( - "SLRU segment {}/{:>04X} was truncated", - slru.to_str(), - segno - ); - return Ok(()); - } - - let nblocks = seg_size.unwrap(); + let nblocks = match seg_size { + Some(seg_size) => seg_size, + None => { + trace!( + "SLRU segment {}/{:>04X} was truncated", + slru.to_str(), + segno + ); + return Ok(()); + } + }; let mut slru_buf: Vec = Vec::with_capacity(nblocks as usize * pg_constants::BLCKSZ as usize); diff --git a/pageserver/src/bin/pageserver.rs b/pageserver/src/bin/pageserver.rs index a2564d51d7..5a1b5e5e2c 100644 --- a/pageserver/src/bin/pageserver.rs +++ b/pageserver/src/bin/pageserver.rs @@ -30,7 +30,7 @@ use zenith_utils::postgres_backend; use zenith_utils::shutdown::exit_now; use zenith_utils::signals::{self, Signal}; -fn main() -> Result<()> { +fn main() -> anyhow::Result<()> { zenith_metrics::set_common_metrics_prefix("pageserver"); let arg_matches = App::new("Zenith page server") .about("Materializes WAL stream to pages and serves them to the postgres") @@ -116,7 +116,7 @@ fn main() -> Result<()> { // We're initializing the repo, so there's no config file yet DEFAULT_CONFIG_FILE .parse::() - .expect("could not parse built-in config file") + .context("could not parse built-in config file")? } else { // Supplement the CLI arguments with the config file let cfg_file_contents = std::fs::read_to_string(&cfg_file_path) @@ -209,7 +209,9 @@ fn start_pageserver(conf: &'static PageServerConf, daemonize: bool) -> Result<() // There shouldn't be any logging to stdin/stdout. Redirect it to the main log so // that we will see any accidental manual fprintf's or backtraces. - let stdout = log_file.try_clone().unwrap(); + let stdout = log_file + .try_clone() + .with_context(|| format!("Failed to clone log file '{:?}'", log_file))?; let stderr = log_file; let daemonize = Daemonize::new() diff --git a/pageserver/src/import_datadir.rs b/pageserver/src/import_datadir.rs index e317118bb5..1e691fb2fe 100644 --- a/pageserver/src/import_datadir.rs +++ b/pageserver/src/import_datadir.rs @@ -70,11 +70,11 @@ pub fn import_timeline_from_postgres_datadir( let direntry = direntry?; //skip all temporary files - if direntry.file_name().to_str().unwrap() == "pgsql_tmp" { + if direntry.file_name().to_string_lossy() == "pgsql_tmp" { continue; } - let dboid = direntry.file_name().to_str().unwrap().parse::()?; + let dboid = direntry.file_name().to_string_lossy().parse::()?; for direntry in fs::read_dir(direntry.path())? { let direntry = direntry?; @@ -117,7 +117,7 @@ pub fn import_timeline_from_postgres_datadir( } for entry in fs::read_dir(path.join("pg_twophase"))? { let entry = entry?; - let xid = u32::from_str_radix(entry.path().to_str().unwrap(), 16)?; + let xid = u32::from_str_radix(&entry.path().to_string_lossy(), 16)?; import_nonrel_file(writer, lsn, RelishTag::TwoPhase { xid }, &entry.path())?; } // TODO: Scan pg_tblspc @@ -156,16 +156,15 @@ fn import_relfile( lsn: Lsn, spcoid: Oid, dboid: Oid, -) -> Result<()> { +) -> anyhow::Result<()> { // Does it look like a relation file? trace!("importing rel file {}", path.display()); - let p = parse_relfilename(path.file_name().unwrap().to_str().unwrap()); - if let Err(e) = p { - warn!("unrecognized file in postgres datadir: {:?} ({})", path, e); - return Err(e.into()); - } - let (relnode, forknum, segno) = p.unwrap(); + let (relnode, forknum, segno) = parse_relfilename(&path.file_name().unwrap().to_string_lossy()) + .map_err(|e| { + warn!("unrecognized file in postgres datadir: {:?} ({})", path, e); + e + })?; let mut file = File::open(path)?; let mut buf: [u8; 8192] = [0u8; 8192]; @@ -271,7 +270,7 @@ fn import_slru_file( // Does it look like an SLRU file? let mut file = File::open(path)?; let mut buf: [u8; 8192] = [0u8; 8192]; - let segno = u32::from_str_radix(path.file_name().unwrap().to_str().unwrap(), 16)?; + let segno = u32::from_str_radix(&path.file_name().unwrap().to_string_lossy(), 16)?; trace!("importing slru file {}", path.display()); diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 9cb0a17e66..4d8d0ada24 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -11,7 +11,7 @@ //! parent timeline, and the last LSN that has been written to disk. //! -use anyhow::{bail, ensure, Context, Result}; +use anyhow::{anyhow, bail, ensure, Context, Result}; use bookfile::Book; use bytes::Bytes; use lazy_static::lazy_static; @@ -1157,9 +1157,9 @@ impl LayeredTimeline { for direntry in fs::read_dir(timeline_path)? { let direntry = direntry?; let fname = direntry.file_name(); - let fname = fname.to_str().unwrap(); + let fname = fname.to_string_lossy(); - if let Some(imgfilename) = ImageFileName::parse_str(fname) { + if let Some(imgfilename) = ImageFileName::parse_str(&fname) { // create an ImageLayer struct for each image file. if imgfilename.lsn > disk_consistent_lsn { warn!( @@ -1177,7 +1177,7 @@ impl LayeredTimeline { trace!("found layer {}", layer.filename().display()); layers.insert_historic(Arc::new(layer)); num_layers += 1; - } else if let Some(deltafilename) = DeltaFileName::parse_str(fname) { + } else if let Some(deltafilename) = DeltaFileName::parse_str(&fname) { // Create a DeltaLayer struct for each delta file. ensure!(deltafilename.start_lsn < deltafilename.end_lsn); // The end-LSN is exclusive, while disk_consistent_lsn is @@ -1203,7 +1203,7 @@ impl LayeredTimeline { num_layers += 1; } else if fname == METADATA_FILE_NAME || fname.ends_with(".old") { // ignore these - } else if is_ephemeral_file(fname) { + } else if is_ephemeral_file(&fname) { // Delete any old ephemeral files trace!("deleting old ephemeral file in timeline dir: {}", fname); fs::remove_file(direntry.path())?; @@ -1938,7 +1938,7 @@ impl LayeredTimeline { seg_blknum: SegmentBlk, lsn: Lsn, layer: &dyn Layer, - ) -> Result { + ) -> anyhow::Result { // Check the page cache. We will get back the most recent page with lsn <= `lsn`. // The cached image can be returned directly if there is no WAL between the cached image // and requested LSN. The cached image can also be used to reduce the amount of WAL needed @@ -1950,7 +1950,9 @@ impl LayeredTimeline { match cached_lsn.cmp(&lsn) { cmp::Ordering::Less => {} // there might be WAL between cached_lsn and lsn, we need to check cmp::Ordering::Equal => return Ok(cached_img), // exact LSN match, return the image - cmp::Ordering::Greater => panic!(), // the returned lsn should never be after the requested lsn + cmp::Ordering::Greater => { + bail!("the returned lsn should never be after the requested lsn") + } } Some((cached_lsn, cached_img)) } @@ -2341,7 +2343,10 @@ pub fn dump_layerfile_from_path(path: &Path) -> Result<()> { /// Add a suffix to a layer file's name: .{num}.old /// Uses the first available num (starts at 0) fn rename_to_backup(path: PathBuf) -> anyhow::Result<()> { - let filename = path.file_name().unwrap().to_str().unwrap(); + let filename = path + .file_name() + .ok_or_else(|| anyhow!("Path {} don't have a file name", path.display()))? + .to_string_lossy(); let mut new_path = path.clone(); for i in 0u32.. { diff --git a/pageserver/src/layered_repository/inmemory_layer.rs b/pageserver/src/layered_repository/inmemory_layer.rs index 6e24bf6022..239fb341a5 100644 --- a/pageserver/src/layered_repository/inmemory_layer.rs +++ b/pageserver/src/layered_repository/inmemory_layer.rs @@ -17,7 +17,7 @@ use crate::layered_repository::LayeredTimeline; use crate::layered_repository::ZERO_PAGE; use crate::repository::ZenithWalRecord; use crate::{ZTenantId, ZTimelineId}; -use anyhow::{ensure, Result}; +use anyhow::{ensure, Result, bail}; use bytes::Bytes; use log::*; use std::collections::HashMap; @@ -150,9 +150,9 @@ impl InMemoryLayerInner { let pos = self.file.stream_position()?; // make room for the 'length' field by writing zeros as a placeholder. - self.file.seek(std::io::SeekFrom::Start(pos + 4)).unwrap(); + self.file.seek(std::io::SeekFrom::Start(pos + 4))?; - pv.ser_into(&mut self.file).unwrap(); + pv.ser_into(&mut self.file)?; // write the 'length' field. let len = self.file.stream_position()? - pos - 4; @@ -315,7 +315,7 @@ impl Layer for InMemoryLayer { return Ok(false); } } else { - panic!("dropped in-memory layer with no end LSN"); + bail!("dropped in-memory layer with no end LSN"); } } @@ -333,7 +333,7 @@ impl Layer for InMemoryLayer { /// Nothing to do here. When you drop the last reference to the layer, it will /// be deallocated. fn delete(&self) -> Result<()> { - panic!("can't delete an InMemoryLayer") + bail!("can't delete an InMemoryLayer") } fn is_incremental(&self) -> bool { diff --git a/pageserver/src/page_cache.rs b/pageserver/src/page_cache.rs index 2992d9477b..ef802ba0e2 100644 --- a/pageserver/src/page_cache.rs +++ b/pageserver/src/page_cache.rs @@ -732,9 +732,10 @@ impl PageCache { CacheKey::MaterializedPage { hash_key: _, lsn: _, - } => { - panic!("unexpected dirty materialized page"); - } + } => Err(std::io::Error::new( + std::io::ErrorKind::Other, + "unexpected dirty materialized page", + )), CacheKey::EphemeralPage { file_id, blkno } => { writeback_ephemeral_file(*file_id, *blkno, buf) } diff --git a/pageserver/src/page_service.rs b/pageserver/src/page_service.rs index 6e6b6415f3..6acdc8e93d 100644 --- a/pageserver/src/page_service.rs +++ b/pageserver/src/page_service.rs @@ -574,7 +574,6 @@ impl postgres_backend::Handler for PageServerHandler { let data = self .auth .as_ref() - .as_ref() .unwrap() .decode(str::from_utf8(jwt_response)?)?; diff --git a/pageserver/src/tenant_threads.rs b/pageserver/src/tenant_threads.rs index 062af9f1ad..c370eb61c8 100644 --- a/pageserver/src/tenant_threads.rs +++ b/pageserver/src/tenant_threads.rs @@ -49,7 +49,7 @@ pub fn gc_loop(tenantid: ZTenantId, conf: &'static PageServerConf) -> Result<()> // Garbage collect old files that are not needed for PITR anymore if conf.gc_horizon > 0 { let repo = tenant_mgr::get_repository_for_tenant(tenantid)?; - repo.gc_iteration(None, conf.gc_horizon, false).unwrap(); + repo.gc_iteration(None, conf.gc_horizon, false)?; } // TODO Write it in more adequate way using diff --git a/pageserver/src/thread_mgr.rs b/pageserver/src/thread_mgr.rs index a51f0909ca..d24d6bf016 100644 --- a/pageserver/src/thread_mgr.rs +++ b/pageserver/src/thread_mgr.rs @@ -250,7 +250,7 @@ pub fn shutdown_threads( let _ = join_handle.join(); } else { // The thread had not even fully started yet. Or it was shut down - // concurrently and alrady exited + // concurrently and already exited } } } diff --git a/pageserver/src/timelines.rs b/pageserver/src/timelines.rs index 00dd0f8f9c..8c018ce70f 100644 --- a/pageserver/src/timelines.rs +++ b/pageserver/src/timelines.rs @@ -250,7 +250,7 @@ fn run_initdb(conf: &'static PageServerConf, initdbpath: &Path) -> Result<()> { let initdb_path = conf.pg_bin_dir().join("initdb"); let initdb_output = Command::new(initdb_path) - .args(&["-D", initdbpath.to_str().unwrap()]) + .args(&["-D", &initdbpath.to_string_lossy()]) .args(&["-U", &conf.superuser]) .args(&["-E", "utf8"]) .arg("--no-instructions") @@ -258,8 +258,8 @@ fn run_initdb(conf: &'static PageServerConf, initdbpath: &Path) -> Result<()> { // so no need to fsync it .arg("--no-sync") .env_clear() - .env("LD_LIBRARY_PATH", conf.pg_lib_dir().to_str().unwrap()) - .env("DYLD_LIBRARY_PATH", conf.pg_lib_dir().to_str().unwrap()) + .env("LD_LIBRARY_PATH", conf.pg_lib_dir()) + .env("DYLD_LIBRARY_PATH", conf.pg_lib_dir()) .stdout(Stdio::null()) .output() .context("failed to execute initdb")?; diff --git a/pageserver/src/virtual_file.rs b/pageserver/src/virtual_file.rs index 73671dcf4e..858cff29cb 100644 --- a/pageserver/src/virtual_file.rs +++ b/pageserver/src/virtual_file.rs @@ -226,7 +226,8 @@ impl VirtualFile { path: &Path, open_options: &OpenOptions, ) -> Result { - let parts = path.to_str().unwrap().split('/').collect::>(); + let path_str = path.to_string_lossy(); + let parts = path_str.split('/').collect::>(); let tenantid; let timelineid; if parts.len() > 5 && parts[parts.len() - 5] == "tenants" { diff --git a/pageserver/src/walingest.rs b/pageserver/src/walingest.rs index 1962c9bbd3..506890476f 100644 --- a/pageserver/src/walingest.rs +++ b/pageserver/src/walingest.rs @@ -249,7 +249,7 @@ impl WalIngest { { let mut checkpoint_bytes = [0u8; SIZEOF_CHECKPOINT]; buf.copy_to_slice(&mut checkpoint_bytes); - let xlog_checkpoint = CheckPoint::decode(&checkpoint_bytes).unwrap(); + let xlog_checkpoint = CheckPoint::decode(&checkpoint_bytes)?; trace!( "xlog_checkpoint.oldestXid={}, checkpoint.oldestXid={}", xlog_checkpoint.oldestXid, diff --git a/pageserver/src/walredo.rs b/pageserver/src/walredo.rs index 877b81b8d5..704b8f2583 100644 --- a/pageserver/src/walredo.rs +++ b/pageserver/src/walredo.rs @@ -375,7 +375,10 @@ impl PostgresRedoManager { ZenithWalRecord::Postgres { will_init: _, rec: _, - } => panic!("tried to pass postgres wal record to zenith WAL redo"), + } => { + error!("tried to pass postgres wal record to zenith WAL redo"); + return Err(WalRedoError::InvalidRequest); + } ZenithWalRecord::ClearVisibilityMapFlags { new_heap_blkno, old_heap_blkno, @@ -541,20 +544,23 @@ impl PostgresRedoProcess { } info!("running initdb in {:?}", datadir.display()); let initdb = Command::new(conf.pg_bin_dir().join("initdb")) - .args(&["-D", datadir.to_str().unwrap()]) + .args(&["-D", &datadir.to_string_lossy()]) .arg("-N") .env_clear() - .env("LD_LIBRARY_PATH", conf.pg_lib_dir().to_str().unwrap()) - .env("DYLD_LIBRARY_PATH", conf.pg_lib_dir().to_str().unwrap()) + .env("LD_LIBRARY_PATH", conf.pg_lib_dir()) + .env("DYLD_LIBRARY_PATH", conf.pg_lib_dir()) .output() - .expect("failed to execute initdb"); + .map_err(|e| Error::new(e.kind(), format!("failed to execute initdb: {}", e)))?; if !initdb.status.success() { - panic!( - "initdb failed: {}\nstderr:\n{}", - std::str::from_utf8(&initdb.stdout).unwrap(), - std::str::from_utf8(&initdb.stderr).unwrap() - ); + return Err(Error::new( + ErrorKind::Other, + format!( + "initdb failed\nstdout: {}\nstderr:\n{}", + String::from_utf8_lossy(&initdb.stdout), + String::from_utf8_lossy(&initdb.stderr) + ), + )); } else { // Limit shared cache for wal-redo-postres let mut config = OpenOptions::new() @@ -572,11 +578,16 @@ impl PostgresRedoProcess { .stderr(Stdio::piped()) .stdout(Stdio::piped()) .env_clear() - .env("LD_LIBRARY_PATH", conf.pg_lib_dir().to_str().unwrap()) - .env("DYLD_LIBRARY_PATH", conf.pg_lib_dir().to_str().unwrap()) + .env("LD_LIBRARY_PATH", conf.pg_lib_dir()) + .env("DYLD_LIBRARY_PATH", conf.pg_lib_dir()) .env("PGDATA", &datadir) .spawn() - .expect("postgres --wal-redo command failed to start"); + .map_err(|e| { + Error::new( + e.kind(), + format!("postgres --wal-redo command failed to start: {}", e), + ) + })?; info!( "launched WAL redo postgres process on {:?}", @@ -636,7 +647,10 @@ impl PostgresRedoProcess { { build_apply_record_msg(*lsn, postgres_rec, &mut writebuf); } else { - panic!("tried to pass zenith wal record to postgres WAL redo"); + return Err(Error::new( + ErrorKind::Other, + "tried to pass zenith wal record to postgres WAL redo", + )); } } build_get_page_msg(tag, &mut writebuf); From f6b1d76c3097c61b89b47849a52fb714b1f45cbf Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Fri, 18 Mar 2022 20:59:55 +0200 Subject: [PATCH 23/83] Replace assert! with ensure! for anyhow::Result functions --- pageserver/src/basebackup.rs | 10 ++++---- pageserver/src/layered_repository.rs | 16 ++++++------ .../src/layered_repository/delta_layer.rs | 12 ++++----- .../src/layered_repository/image_layer.rs | 20 +++++++-------- .../src/layered_repository/inmemory_layer.rs | 25 +++++++++++-------- pageserver/src/layered_repository/metadata.rs | 4 +-- pageserver/src/walreceiver.rs | 4 +-- 7 files changed, 48 insertions(+), 43 deletions(-) diff --git a/pageserver/src/basebackup.rs b/pageserver/src/basebackup.rs index c316fc43d1..5711f1807d 100644 --- a/pageserver/src/basebackup.rs +++ b/pageserver/src/basebackup.rs @@ -10,7 +10,7 @@ //! This module is responsible for creation of such tarball //! from data stored in object storage. //! -use anyhow::{Context, Result}; +use anyhow::{ensure, Context, Result}; use bytes::{BufMut, BytesMut}; use log::*; use std::fmt::Write as FmtWrite; @@ -163,7 +163,7 @@ impl<'a> Basebackup<'a> { let img = self.timeline .get_page_at_lsn(RelishTag::Slru { slru, segno }, blknum, self.lsn)?; - assert!(img.len() == pg_constants::BLCKSZ as usize); + ensure!(img.len() == pg_constants::BLCKSZ as usize); slru_buf.extend_from_slice(&img); } @@ -197,7 +197,7 @@ impl<'a> Basebackup<'a> { String::from("global/pg_filenode.map") // filenode map for global tablespace } else { // User defined tablespaces are not supported - assert!(spcnode == pg_constants::DEFAULTTABLESPACE_OID); + ensure!(spcnode == pg_constants::DEFAULTTABLESPACE_OID); // Append dir path for each database let path = format!("base/{}", dbnode); @@ -211,7 +211,7 @@ impl<'a> Basebackup<'a> { format!("base/{}/pg_filenode.map", dbnode) }; - assert!(img.len() == 512); + ensure!(img.len() == 512); let header = new_tar_header(&path, img.len() as u64)?; self.ar.append(&header, &img[..])?; Ok(()) @@ -292,7 +292,7 @@ impl<'a> Basebackup<'a> { let wal_file_path = format!("pg_wal/{}", wal_file_name); let header = new_tar_header(&wal_file_path, pg_constants::WAL_SEGMENT_SIZE as u64)?; let wal_seg = generate_wal_segment(segno, pg_control.system_identifier); - assert!(wal_seg.len() == pg_constants::WAL_SEGMENT_SIZE); + ensure!(wal_seg.len() == pg_constants::WAL_SEGMENT_SIZE); self.ar.append(&header, &wal_seg[..])?; Ok(()) } diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 4d8d0ada24..7ec11add9c 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -791,10 +791,10 @@ impl Timeline for LayeredTimeline { } /// Wait until WAL has been received up to the given LSN. - fn wait_lsn(&self, lsn: Lsn) -> Result<()> { + fn wait_lsn(&self, lsn: Lsn) -> anyhow::Result<()> { // This should never be called from the WAL receiver thread, because that could lead // to a deadlock. - assert!( + ensure!( !IS_WAL_RECEIVER.with(|c| c.get()), "wait_lsn called by WAL receiver thread" ); @@ -1262,7 +1262,7 @@ impl LayeredTimeline { seg: SegmentTag, lsn: Lsn, self_layers: &MutexGuard, - ) -> Result, Lsn)>> { + ) -> anyhow::Result, Lsn)>> { trace!("get_layer_for_read called for {} at {}", seg, lsn); // If you requested a page at an older LSN, before the branch point, dig into @@ -1310,7 +1310,7 @@ impl LayeredTimeline { layer.get_end_lsn() ); - assert!(layer.get_start_lsn() <= lsn); + ensure!(layer.get_start_lsn() <= lsn); if layer.is_dropped() && layer.get_end_lsn() <= lsn { return Ok(None); @@ -1338,13 +1338,13 @@ impl LayeredTimeline { /// /// Get a handle to the latest layer for appending. /// - fn get_layer_for_write(&self, seg: SegmentTag, lsn: Lsn) -> Result> { + fn get_layer_for_write(&self, seg: SegmentTag, lsn: Lsn) -> anyhow::Result> { let mut layers = self.layers.lock().unwrap(); - assert!(lsn.is_aligned()); + ensure!(lsn.is_aligned()); let last_record_lsn = self.get_last_record_lsn(); - assert!( + ensure!( lsn > last_record_lsn, "cannot modify relation after advancing last_record_lsn (incoming_lsn={}, last_record_lsn={})", lsn, @@ -1360,7 +1360,7 @@ impl LayeredTimeline { // Open layer exists, but it is dropped, so create a new one. if open_layer.is_dropped() { - assert!(!open_layer.is_writeable()); + ensure!(!open_layer.is_writeable()); // Layer that is created after dropped one represents a new relish segment. trace!( "creating layer for write for new relish segment after dropped layer {} at {}/{}", diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs index 7434b8de11..f6e5510339 100644 --- a/pageserver/src/layered_repository/delta_layer.rs +++ b/pageserver/src/layered_repository/delta_layer.rs @@ -209,10 +209,10 @@ impl Layer for DeltaLayer { blknum: SegmentBlk, lsn: Lsn, reconstruct_data: &mut PageReconstructData, - ) -> Result { + ) -> anyhow::Result { let mut need_image = true; - assert!((0..RELISH_SEG_SIZE).contains(&blknum)); + ensure!((0..RELISH_SEG_SIZE).contains(&blknum)); match &reconstruct_data.page_img { Some((cached_lsn, _)) if &self.end_lsn <= cached_lsn => { @@ -289,8 +289,8 @@ impl Layer for DeltaLayer { } /// Get size of the relation at given LSN - fn get_seg_size(&self, lsn: Lsn) -> Result { - assert!(lsn >= self.start_lsn); + fn get_seg_size(&self, lsn: Lsn) -> anyhow::Result { + ensure!(lsn >= self.start_lsn); ensure!( self.seg.rel.is_blocky(), "get_seg_size() called on a non-blocky rel" @@ -641,7 +641,7 @@ impl DeltaLayerWriter { /// /// 'seg_sizes' is a list of size changes to store with the actual data. /// - pub fn finish(self, seg_sizes: VecMap) -> Result { + pub fn finish(self, seg_sizes: VecMap) -> anyhow::Result { // Close the page-versions chapter let book = self.page_version_writer.close()?; @@ -652,7 +652,7 @@ impl DeltaLayerWriter { let book = chapter.close()?; if self.seg.rel.is_blocky() { - assert!(!seg_sizes.is_empty()); + ensure!(!seg_sizes.is_empty()); } // and seg_sizes to separate chapter diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs index 24445ff7e9..c706f58e39 100644 --- a/pageserver/src/layered_repository/image_layer.rs +++ b/pageserver/src/layered_repository/image_layer.rs @@ -146,9 +146,9 @@ impl Layer for ImageLayer { blknum: SegmentBlk, lsn: Lsn, reconstruct_data: &mut PageReconstructData, - ) -> Result { - assert!((0..RELISH_SEG_SIZE).contains(&blknum)); - assert!(lsn >= self.lsn); + ) -> anyhow::Result { + ensure!((0..RELISH_SEG_SIZE).contains(&blknum)); + ensure!(lsn >= self.lsn); match reconstruct_data.page_img { Some((cached_lsn, _)) if self.lsn <= cached_lsn => { @@ -432,7 +432,7 @@ impl ImageLayerWriter { seg: SegmentTag, lsn: Lsn, num_blocks: SegmentBlk, - ) -> Result { + ) -> anyhow::Result { // Create the file // // Note: This overwrites any existing file. There shouldn't be any. @@ -452,7 +452,7 @@ impl ImageLayerWriter { let chapter = if seg.rel.is_blocky() { book.new_chapter(BLOCKY_IMAGES_CHAPTER) } else { - assert_eq!(num_blocks, 1); + ensure!(num_blocks == 1); book.new_chapter(NONBLOCKY_IMAGE_CHAPTER) }; @@ -475,19 +475,19 @@ impl ImageLayerWriter { /// /// The page versions must be appended in blknum order. /// - pub fn put_page_image(&mut self, block_bytes: &[u8]) -> Result<()> { - assert!(self.num_blocks_written < self.num_blocks); + pub fn put_page_image(&mut self, block_bytes: &[u8]) -> anyhow::Result<()> { + ensure!(self.num_blocks_written < self.num_blocks); if self.seg.rel.is_blocky() { - assert_eq!(block_bytes.len(), BLOCK_SIZE); + ensure!(block_bytes.len() == BLOCK_SIZE); } self.page_image_writer.write_all(block_bytes)?; self.num_blocks_written += 1; Ok(()) } - pub fn finish(self) -> Result { + pub fn finish(self) -> anyhow::Result { // Check that the `put_page_image' was called for every block. - assert!(self.num_blocks_written == self.num_blocks); + ensure!(self.num_blocks_written == self.num_blocks); // Close the page-images chapter let book = self.page_image_writer.close()?; diff --git a/pageserver/src/layered_repository/inmemory_layer.rs b/pageserver/src/layered_repository/inmemory_layer.rs index 239fb341a5..fed1fb6469 100644 --- a/pageserver/src/layered_repository/inmemory_layer.rs +++ b/pageserver/src/layered_repository/inmemory_layer.rs @@ -17,7 +17,7 @@ use crate::layered_repository::LayeredTimeline; use crate::layered_repository::ZERO_PAGE; use crate::repository::ZenithWalRecord; use crate::{ZTenantId, ZTimelineId}; -use anyhow::{ensure, Result, bail}; +use anyhow::{bail, ensure, Result}; use bytes::Bytes; use log::*; use std::collections::HashMap; @@ -224,10 +224,10 @@ impl Layer for InMemoryLayer { blknum: SegmentBlk, lsn: Lsn, reconstruct_data: &mut PageReconstructData, - ) -> Result { + ) -> anyhow::Result { let mut need_image = true; - assert!((0..RELISH_SEG_SIZE).contains(&blknum)); + ensure!((0..RELISH_SEG_SIZE).contains(&blknum)); { let inner = self.inner.read().unwrap(); @@ -288,8 +288,8 @@ impl Layer for InMemoryLayer { } /// Get size of the relation at given LSN - fn get_seg_size(&self, lsn: Lsn) -> Result { - assert!(lsn >= self.start_lsn); + fn get_seg_size(&self, lsn: Lsn) -> anyhow::Result { + ensure!(lsn >= self.start_lsn); ensure!( self.seg.rel.is_blocky(), "get_seg_size() called on a non-blocky rel" @@ -300,13 +300,13 @@ impl Layer for InMemoryLayer { } /// Does this segment exist at given LSN? - fn get_seg_exists(&self, lsn: Lsn) -> Result { + fn get_seg_exists(&self, lsn: Lsn) -> anyhow::Result { let inner = self.inner.read().unwrap(); // If the segment created after requested LSN, // it doesn't exist in the layer. But we shouldn't // have requested it in the first place. - assert!(lsn >= self.start_lsn); + ensure!(lsn >= self.start_lsn); // Is the requested LSN after the segment was dropped? if inner.dropped { @@ -466,8 +466,13 @@ impl InMemoryLayer { /// Common subroutine of the public put_wal_record() and put_page_image() functions. /// Adds the page version to the in-memory tree - pub fn put_page_version(&self, blknum: SegmentBlk, lsn: Lsn, pv: PageVersion) -> Result { - assert!((0..RELISH_SEG_SIZE).contains(&blknum)); + pub fn put_page_version( + &self, + blknum: SegmentBlk, + lsn: Lsn, + pv: PageVersion, + ) -> anyhow::Result { + ensure!((0..RELISH_SEG_SIZE).contains(&blknum)); trace!( "put_page_version blk {} of {} at {}/{}", @@ -479,7 +484,7 @@ impl InMemoryLayer { let mut inner = self.inner.write().unwrap(); inner.assert_writeable(); - assert!(lsn >= inner.latest_lsn); + ensure!(lsn >= inner.latest_lsn); inner.latest_lsn = lsn; // Write the page version to the file, and remember its offset in 'page_versions' diff --git a/pageserver/src/layered_repository/metadata.rs b/pageserver/src/layered_repository/metadata.rs index 99d786c4cd..17e0485093 100644 --- a/pageserver/src/layered_repository/metadata.rs +++ b/pageserver/src/layered_repository/metadata.rs @@ -96,7 +96,7 @@ impl TimelineMetadata { ); let data = TimelineMetadata::from(serialize::DeTimelineMetadata::des_prefix(data)?); - assert!(data.disk_consistent_lsn.is_aligned()); + ensure!(data.disk_consistent_lsn.is_aligned()); Ok(data) } @@ -104,7 +104,7 @@ impl TimelineMetadata { pub fn to_bytes(&self) -> anyhow::Result> { let serializeable_metadata = serialize::SeTimelineMetadata::from(self); let mut metadata_bytes = serialize::SeTimelineMetadata::ser(&serializeable_metadata)?; - assert!(metadata_bytes.len() <= METADATA_MAX_DATA_SIZE); + ensure!(metadata_bytes.len() <= METADATA_MAX_DATA_SIZE); metadata_bytes.resize(METADATA_MAX_SAFE_SIZE, 0u8); let checksum = crc32c::crc32c(&metadata_bytes[..METADATA_MAX_DATA_SIZE]); diff --git a/pageserver/src/walreceiver.rs b/pageserver/src/walreceiver.rs index 305dd4b3a2..43fb7db4b0 100644 --- a/pageserver/src/walreceiver.rs +++ b/pageserver/src/walreceiver.rs @@ -146,7 +146,7 @@ fn walreceiver_main( tenant_id: ZTenantId, timeline_id: ZTimelineId, wal_producer_connstr: &str, -) -> Result<(), Error> { +) -> anyhow::Result<(), Error> { // Connect to the database in replication mode. info!("connecting to {:?}", wal_producer_connstr); let connect_cfg = format!( @@ -255,7 +255,7 @@ fn walreceiver_main( // It is important to deal with the aligned records as lsn in getPage@LSN is // aligned and can be several bytes bigger. Without this alignment we are // at risk of hittind a deadlock. - assert!(lsn.is_aligned()); + anyhow::ensure!(lsn.is_aligned()); let writer = timeline.writer(); walingest.ingest_record(writer.as_ref(), recdata, lsn)?; From 6244fd9e7eb78cd056cc92e67ca2fc6bf67eca22 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Wed, 23 Mar 2022 00:57:20 +0200 Subject: [PATCH 24/83] Better error messages on zenith cli subcommand invocations --- control_plane/src/storage.rs | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/control_plane/src/storage.rs b/control_plane/src/storage.rs index 835c93bf1d..c49d5743a9 100644 --- a/control_plane/src/storage.rs +++ b/control_plane/src/storage.rs @@ -148,12 +148,20 @@ impl PageServerNode { let initial_timeline_id_string = initial_timeline_id.to_string(); args.extend(["--initial-timeline-id", &initial_timeline_id_string]); - let init_output = fill_rust_env_vars(cmd.args(args)) + let cmd_with_args = cmd.args(args); + let init_output = fill_rust_env_vars(cmd_with_args) .output() - .context("pageserver init failed")?; + .with_context(|| { + format!("failed to init pageserver with command {:?}", cmd_with_args) + })?; if !init_output.status.success() { - bail!("pageserver init failed"); + bail!( + "init invocation failed, {}\nStdout: {}\nStderr: {}", + init_output.status, + String::from_utf8_lossy(&init_output.stdout), + String::from_utf8_lossy(&init_output.stderr) + ); } Ok(initial_timeline_id) From 28bc8e3f5c961532f4177fb3e803b73f6a2adb5a Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Wed, 23 Mar 2022 19:33:06 +0200 Subject: [PATCH 25/83] Log pageserver threads better and shut down on errors in them --- pageserver/src/bin/pageserver.rs | 33 +----------------------- pageserver/src/layered_repository.rs | 2 +- pageserver/src/lib.rs | 38 +++++++++++++++++++++++++++- pageserver/src/thread_mgr.rs | 38 +++++++++++++++++++++------- 4 files changed, 68 insertions(+), 43 deletions(-) diff --git a/pageserver/src/bin/pageserver.rs b/pageserver/src/bin/pageserver.rs index 5a1b5e5e2c..14249963de 100644 --- a/pageserver/src/bin/pageserver.rs +++ b/pageserver/src/bin/pageserver.rs @@ -26,7 +26,6 @@ use pageserver::{ timelines, virtual_file, LOG_FILE_NAME, }; use zenith_utils::http::endpoint; -use zenith_utils::postgres_backend; use zenith_utils::shutdown::exit_now; use zenith_utils::signals::{self, Signal}; @@ -322,38 +321,8 @@ fn start_pageserver(conf: &'static PageServerConf, daemonize: bool) -> Result<() "Got {}. Terminating gracefully in fast shutdown mode", signal.name() ); - shutdown_pageserver(); + pageserver::shutdown_pageserver(); unreachable!() } }) } - -fn shutdown_pageserver() { - // Shut down the libpq endpoint thread. This prevents new connections from - // being accepted. - thread_mgr::shutdown_threads(Some(ThreadKind::LibpqEndpointListener), None, None); - - // Shut down any page service threads. - postgres_backend::set_pgbackend_shutdown_requested(); - thread_mgr::shutdown_threads(Some(ThreadKind::PageRequestHandler), None, None); - - // Shut down all the tenants. This flushes everything to disk and kills - // the checkpoint and GC threads. - tenant_mgr::shutdown_all_tenants(); - - // Stop syncing with remote storage. - // - // FIXME: Does this wait for the sync thread to finish syncing what's queued up? - // Should it? - thread_mgr::shutdown_threads(Some(ThreadKind::StorageSync), None, None); - - // Shut down the HTTP endpoint last, so that you can still check the server's - // status while it's shutting down. - thread_mgr::shutdown_threads(Some(ThreadKind::HttpEndpointListener), None, None); - - // There should be nothing left, but let's be sure - thread_mgr::shutdown_threads(None, None, None); - - info!("Shut down successfully completed"); - std::process::exit(0); -} diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 7ec11add9c..ac0afcb275 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -976,7 +976,7 @@ impl Timeline for LayeredTimeline { /// Public entry point for checkpoint(). All the logic is in the private /// checkpoint_internal function, this public facade just wraps it for /// metrics collection. - fn checkpoint(&self, cconf: CheckpointConfig) -> Result<()> { + fn checkpoint(&self, cconf: CheckpointConfig) -> anyhow::Result<()> { match cconf { CheckpointConfig::Flush => self .flush_checkpoint_time_histo diff --git a/pageserver/src/lib.rs b/pageserver/src/lib.rs index 3d66192c80..060fa54b23 100644 --- a/pageserver/src/lib.rs +++ b/pageserver/src/lib.rs @@ -19,8 +19,14 @@ pub mod walrecord; pub mod walredo; use lazy_static::lazy_static; +use tracing::info; use zenith_metrics::{register_int_gauge_vec, IntGaugeVec}; -use zenith_utils::zid::{ZTenantId, ZTimelineId}; +use zenith_utils::{ + postgres_backend, + zid::{ZTenantId, ZTimelineId}, +}; + +use crate::thread_mgr::ThreadKind; lazy_static! { static ref LIVE_CONNECTIONS_COUNT: IntGaugeVec = register_int_gauge_vec!( @@ -43,3 +49,33 @@ pub enum CheckpointConfig { // Flush all in-memory data and reconstruct all page images Forced, } + +pub fn shutdown_pageserver() { + // Shut down the libpq endpoint thread. This prevents new connections from + // being accepted. + thread_mgr::shutdown_threads(Some(ThreadKind::LibpqEndpointListener), None, None); + + // Shut down any page service threads. + postgres_backend::set_pgbackend_shutdown_requested(); + thread_mgr::shutdown_threads(Some(ThreadKind::PageRequestHandler), None, None); + + // Shut down all the tenants. This flushes everything to disk and kills + // the checkpoint and GC threads. + tenant_mgr::shutdown_all_tenants(); + + // Stop syncing with remote storage. + // + // FIXME: Does this wait for the sync thread to finish syncing what's queued up? + // Should it? + thread_mgr::shutdown_threads(Some(ThreadKind::StorageSync), None, None); + + // Shut down the HTTP endpoint last, so that you can still check the server's + // status while it's shutting down. + thread_mgr::shutdown_threads(Some(ThreadKind::HttpEndpointListener), None, None); + + // There should be nothing left, but let's be sure + thread_mgr::shutdown_threads(None, None, None); + + info!("Shut down successfully completed"); + std::process::exit(0); +} diff --git a/pageserver/src/thread_mgr.rs b/pageserver/src/thread_mgr.rs index d24d6bf016..c4202e80be 100644 --- a/pageserver/src/thread_mgr.rs +++ b/pageserver/src/thread_mgr.rs @@ -43,12 +43,14 @@ use std::thread::JoinHandle; use tokio::sync::watch; -use tracing::{info, warn}; +use tracing::{error, info, warn}; use lazy_static::lazy_static; use zenith_utils::zid::{ZTenantId, ZTimelineId}; +use crate::shutdown_pageserver; + lazy_static! { /// Each thread that we track is associated with a "thread ID". It's just /// an increasing number that we assign, not related to any system thread @@ -125,7 +127,7 @@ struct PageServerThread { } /// Launch a new thread -pub fn spawn( +pub fn spawn( kind: ThreadKind, tenant_id: Option, timeline_id: Option, @@ -133,7 +135,7 @@ pub fn spawn( f: F, ) -> std::io::Result<()> where - F: FnOnce() -> Result<(), E> + Send + 'static, + F: FnOnce() -> anyhow::Result<()> + Send + 'static, { let (shutdown_tx, shutdown_rx) = watch::channel(()); let thread_id = NEXT_THREAD_ID.fetch_add(1, Ordering::Relaxed); @@ -160,12 +162,14 @@ where .insert(thread_id, Arc::clone(&thread_rc)); let thread_rc2 = Arc::clone(&thread_rc); + let thread_name = name.to_string(); let join_handle = match thread::Builder::new() .name(name.to_string()) - .spawn(move || thread_wrapper(thread_id, thread_rc2, shutdown_rx, f)) + .spawn(move || thread_wrapper(thread_name, thread_id, thread_rc2, shutdown_rx, f)) { Ok(handle) => handle, Err(err) => { + error!("Failed to spawn thread '{}': {}", name, err); // Could not spawn the thread. Remove the entry THREADS.lock().unwrap().remove(&thread_id); return Err(err); @@ -180,13 +184,14 @@ where /// This wrapper function runs in a newly-spawned thread. It initializes the /// thread-local variables and calls the payload function -fn thread_wrapper( +fn thread_wrapper( + thread_name: String, thread_id: u64, thread: Arc, shutdown_rx: watch::Receiver<()>, f: F, ) where - F: FnOnce() -> Result<(), E> + Send + 'static, + F: FnOnce() -> anyhow::Result<()> + Send + 'static, { SHUTDOWN_RX.with(|rx| { *rx.borrow_mut() = Some(shutdown_rx); @@ -195,6 +200,8 @@ fn thread_wrapper( *ct.borrow_mut() = Some(thread); }); + info!("Starting thread '{}'", thread_name); + // We use AssertUnwindSafe here so that the payload function // doesn't need to be UnwindSafe. We don't do anything after the // unwinding that would expose us to unwind-unsafe behavior. @@ -203,9 +210,22 @@ fn thread_wrapper( // Remove our entry from the global hashmap. THREADS.lock().unwrap().remove(&thread_id); - // If the thread payload panic'd, exit with the panic. - if let Err(err) = result { - panic::resume_unwind(err); + match result { + Ok(Ok(())) => info!("Thread '{}' exited normally", thread_name), + Ok(Err(err)) => { + error!( + "Shutting down: thread '{}' exited with error: {:?}", + thread_name, err + ); + shutdown_pageserver(); + } + Err(err) => { + error!( + "Shutting down: thread '{}' panicked: {:?}", + thread_name, err + ); + shutdown_pageserver(); + } } } From b39d1b17177eb6fe9509b87cb8908f8128ab78bc Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Thu, 24 Mar 2022 14:05:15 +0200 Subject: [PATCH 26/83] Exit only on important thread failures --- pageserver/src/bin/pageserver.rs | 2 ++ pageserver/src/page_service.rs | 1 + pageserver/src/remote_storage/storage_sync.rs | 8 ++--- pageserver/src/tenant_mgr.rs | 35 ++++++++++++------- pageserver/src/thread_mgr.rs | 34 ++++++++++++------ pageserver/src/walreceiver.rs | 11 +++--- 6 files changed, 57 insertions(+), 34 deletions(-) diff --git a/pageserver/src/bin/pageserver.rs b/pageserver/src/bin/pageserver.rs index 14249963de..e217806147 100644 --- a/pageserver/src/bin/pageserver.rs +++ b/pageserver/src/bin/pageserver.rs @@ -291,6 +291,7 @@ fn start_pageserver(conf: &'static PageServerConf, daemonize: bool) -> Result<() None, None, "http_endpoint_thread", + false, move || { let router = http::make_router(conf, auth_cloned, remote_index); endpoint::serve_thread_main(router, http_listener, thread_mgr::shutdown_watcher()) @@ -304,6 +305,7 @@ fn start_pageserver(conf: &'static PageServerConf, daemonize: bool) -> Result<() None, None, "libpq endpoint thread", + false, move || page_service::thread_main(conf, auth, pageserver_listener, conf.auth_type), )?; diff --git a/pageserver/src/page_service.rs b/pageserver/src/page_service.rs index 6acdc8e93d..4744f0fe52 100644 --- a/pageserver/src/page_service.rs +++ b/pageserver/src/page_service.rs @@ -228,6 +228,7 @@ pub fn thread_main( None, None, "serving Page Service thread", + false, move || page_service_conn_main(conf, local_auth, socket, auth_type), ) { // Thread creation failed. Log the error and continue. diff --git a/pageserver/src/remote_storage/storage_sync.rs b/pageserver/src/remote_storage/storage_sync.rs index 4ad28e6f8f..b01b152e0a 100644 --- a/pageserver/src/remote_storage/storage_sync.rs +++ b/pageserver/src/remote_storage/storage_sync.rs @@ -404,6 +404,7 @@ pub(super) fn spawn_storage_sync_thread< None, None, "Remote storage sync thread", + false, move || { storage_sync_loop( runtime, @@ -413,7 +414,8 @@ pub(super) fn spawn_storage_sync_thread< storage, max_concurrent_sync, max_sync_errors, - ) + ); + Ok(()) }, ) .context("Failed to spawn remote storage sync thread")?; @@ -440,7 +442,7 @@ fn storage_sync_loop< storage: S, max_concurrent_sync: NonZeroUsize, max_sync_errors: NonZeroU32, -) -> anyhow::Result<()> { +) { let remote_assets = Arc::new((storage, Arc::clone(&index))); loop { let index = Arc::clone(&index); @@ -470,8 +472,6 @@ fn storage_sync_loop< } } } - - Ok(()) } async fn loop_step< diff --git a/pageserver/src/tenant_mgr.rs b/pageserver/src/tenant_mgr.rs index 4d6dfd7488..0bc18231c9 100644 --- a/pageserver/src/tenant_mgr.rs +++ b/pageserver/src/tenant_mgr.rs @@ -206,13 +206,13 @@ pub fn get_tenant_state(tenantid: ZTenantId) -> Option { /// Change the state of a tenant to Active and launch its checkpointer and GC /// threads. If the tenant was already in Active state or Stopping, does nothing. /// -pub fn activate_tenant(conf: &'static PageServerConf, tenantid: ZTenantId) -> Result<()> { +pub fn activate_tenant(conf: &'static PageServerConf, tenant_id: ZTenantId) -> Result<()> { let mut m = access_tenants(); let tenant = m - .get_mut(&tenantid) - .with_context(|| format!("Tenant not found for id {}", tenantid))?; + .get_mut(&tenant_id) + .with_context(|| format!("Tenant not found for id {}", tenant_id))?; - info!("activating tenant {}", tenantid); + info!("activating tenant {}", tenant_id); match tenant.state { // If the tenant is already active, nothing to do. @@ -222,22 +222,31 @@ pub fn activate_tenant(conf: &'static PageServerConf, tenantid: ZTenantId) -> Re TenantState::Idle => { thread_mgr::spawn( ThreadKind::Checkpointer, - Some(tenantid), + Some(tenant_id), None, "Checkpointer thread", - move || crate::tenant_threads::checkpoint_loop(tenantid, conf), + true, + move || crate::tenant_threads::checkpoint_loop(tenant_id, conf), )?; - // FIXME: if we fail to launch the GC thread, but already launched the - // checkpointer, we're in a strange state. - - thread_mgr::spawn( + let gc_spawn_result = thread_mgr::spawn( ThreadKind::GarbageCollector, - Some(tenantid), + Some(tenant_id), None, "GC thread", - move || crate::tenant_threads::gc_loop(tenantid, conf), - )?; + true, + move || crate::tenant_threads::gc_loop(tenant_id, conf), + ) + .with_context(|| format!("Failed to launch GC thread for tenant {}", tenant_id)); + + if let Err(e) = &gc_spawn_result { + error!( + "Failed to start GC thread for tenant {}, stopping its checkpointer thread: {:?}", + tenant_id, e + ); + thread_mgr::shutdown_threads(Some(ThreadKind::Checkpointer), Some(tenant_id), None); + return gc_spawn_result; + } tenant.state = TenantState::Active; } diff --git a/pageserver/src/thread_mgr.rs b/pageserver/src/thread_mgr.rs index c4202e80be..cafdc5e700 100644 --- a/pageserver/src/thread_mgr.rs +++ b/pageserver/src/thread_mgr.rs @@ -43,7 +43,7 @@ use std::thread::JoinHandle; use tokio::sync::watch; -use tracing::{error, info, warn}; +use tracing::{debug, error, info, warn}; use lazy_static::lazy_static; @@ -132,6 +132,7 @@ pub fn spawn( tenant_id: Option, timeline_id: Option, name: &str, + fail_on_error: bool, f: F, ) -> std::io::Result<()> where @@ -165,8 +166,16 @@ where let thread_name = name.to_string(); let join_handle = match thread::Builder::new() .name(name.to_string()) - .spawn(move || thread_wrapper(thread_name, thread_id, thread_rc2, shutdown_rx, f)) - { + .spawn(move || { + thread_wrapper( + thread_name, + thread_id, + thread_rc2, + shutdown_rx, + fail_on_error, + f, + ) + }) { Ok(handle) => handle, Err(err) => { error!("Failed to spawn thread '{}': {}", name, err); @@ -189,6 +198,7 @@ fn thread_wrapper( thread_id: u64, thread: Arc, shutdown_rx: watch::Receiver<()>, + fail_on_error: bool, f: F, ) where F: FnOnce() -> anyhow::Result<()> + Send + 'static, @@ -200,7 +210,7 @@ fn thread_wrapper( *ct.borrow_mut() = Some(thread); }); - info!("Starting thread '{}'", thread_name); + debug!("Starting thread '{}'", thread_name); // We use AssertUnwindSafe here so that the payload function // doesn't need to be UnwindSafe. We don't do anything after the @@ -211,13 +221,17 @@ fn thread_wrapper( THREADS.lock().unwrap().remove(&thread_id); match result { - Ok(Ok(())) => info!("Thread '{}' exited normally", thread_name), + Ok(Ok(())) => debug!("Thread '{}' exited normally", thread_name), Ok(Err(err)) => { - error!( - "Shutting down: thread '{}' exited with error: {:?}", - thread_name, err - ); - shutdown_pageserver(); + if fail_on_error { + error!( + "Shutting down: thread '{}' exited with error: {:?}", + thread_name, err + ); + shutdown_pageserver(); + } else { + error!("Thread '{}' exited with error: {:?}", thread_name, err); + } } Err(err) => { error!( diff --git a/pageserver/src/walreceiver.rs b/pageserver/src/walreceiver.rs index 43fb7db4b0..2c10ad315b 100644 --- a/pageserver/src/walreceiver.rs +++ b/pageserver/src/walreceiver.rs @@ -78,9 +78,11 @@ pub fn launch_wal_receiver( Some(tenantid), Some(timelineid), "WAL receiver thread", + false, move || { IS_WAL_RECEIVER.with(|c| c.set(true)); - thread_main(conf, tenantid, timelineid) + thread_main(conf, tenantid, timelineid); + Ok(()) }, )?; @@ -110,11 +112,7 @@ fn get_wal_producer_connstr(tenantid: ZTenantId, timelineid: ZTimelineId) -> Str // // This is the entry point for the WAL receiver thread. // -fn thread_main( - conf: &'static PageServerConf, - tenant_id: ZTenantId, - timeline_id: ZTimelineId, -) -> Result<()> { +fn thread_main(conf: &'static PageServerConf, tenant_id: ZTenantId, timeline_id: ZTimelineId) { let _enter = info_span!("WAL receiver", timeline = %timeline_id, tenant = %tenant_id).entered(); info!("WAL receiver thread started"); @@ -138,7 +136,6 @@ fn thread_main( // Drop it from list of active WAL_RECEIVERS // so that next callmemaybe request launched a new thread drop_wal_receiver(tenant_id, timeline_id); - Ok(()) } fn walreceiver_main( From e3fa00972e4987f2a3653ab7d547c357a94129fc Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Fri, 25 Mar 2022 15:34:38 +0200 Subject: [PATCH 27/83] Use RwLocks in image and delta layers for more concurrency. With a Mutex, only one thread could read from the layer at a time. I did some ad hoc profiling with pgbench and saw that a fair amout of time was spent blocked on these Mutexes. --- .../src/layered_repository/delta_layer.rs | 51 ++++++++++++++----- .../src/layered_repository/image_layer.rs | 46 ++++++++++++----- 2 files changed, 72 insertions(+), 25 deletions(-) diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs index f6e5510339..1a6e941fbe 100644 --- a/pageserver/src/layered_repository/delta_layer.rs +++ b/pageserver/src/layered_repository/delta_layer.rs @@ -58,7 +58,7 @@ use std::io::{BufWriter, Write}; use std::ops::Bound::Included; use std::os::unix::fs::FileExt; use std::path::{Path, PathBuf}; -use std::sync::{Mutex, MutexGuard}; +use std::sync::{RwLock, RwLockReadGuard, RwLockWriteGuard, TryLockError}; use bookfile::{Book, BookWriter, BoundedReader, ChapterWriter}; @@ -142,7 +142,7 @@ pub struct DeltaLayer { dropped: bool, - inner: Mutex, + inner: RwLock, } pub struct DeltaLayerInner { @@ -316,7 +316,11 @@ impl Layer for DeltaLayer { /// it will need to be loaded back. /// fn unload(&self) -> Result<()> { - let mut inner = self.inner.lock().unwrap(); + let mut inner = match self.inner.try_write() { + Ok(inner) => inner, + Err(TryLockError::WouldBlock) => return Ok(()), + Err(TryLockError::Poisoned(_)) => panic!("DeltaLayer lock was poisoned"), + }; inner.page_version_metas = VecMap::default(); inner.seg_sizes = VecMap::default(); inner.loaded = false; @@ -406,16 +410,37 @@ impl DeltaLayer { } /// - /// Load the contents of the file into memory + /// Open the underlying file and read the metadata into memory, if it's + /// not loaded already. /// - fn load(&self) -> Result> { - // quick exit if already loaded - let mut inner = self.inner.lock().unwrap(); + fn load(&self) -> Result> { + loop { + // Quick exit if already loaded + let inner = self.inner.read().unwrap(); + if inner.loaded { + return Ok(inner); + } - if inner.loaded { - return Ok(inner); + // Need to open the file and load the metadata. Upgrade our lock to + // a write lock. (Or rather, release and re-lock in write mode.) + drop(inner); + let inner = self.inner.write().unwrap(); + if !inner.loaded { + self.load_inner(inner)?; + } else { + // Another thread loaded it while we were not holding the lock. + } + + // We now have the file open and loaded. There's no function to do + // that in the std library RwLock, so we have to release and re-lock + // in read mode. (To be precise, the lock guard was moved in the + // above call to `load_inner`, so it's already been released). And + // while we do that, another thread could unload again, so we have + // to re-check and retry if that happens. } + } + fn load_inner(&self, mut inner: RwLockWriteGuard) -> Result<()> { let path = self.path(); // Open the file if it's not open already. @@ -462,7 +487,7 @@ impl DeltaLayer { inner.seg_sizes = seg_sizes; inner.loaded = true; - Ok(inner) + Ok(()) } /// Create a DeltaLayer struct representing an existing file on disk. @@ -480,7 +505,7 @@ impl DeltaLayer { start_lsn: filename.start_lsn, end_lsn: filename.end_lsn, dropped: filename.dropped, - inner: Mutex::new(DeltaLayerInner { + inner: RwLock::new(DeltaLayerInner { loaded: false, book: None, page_version_metas: VecMap::default(), @@ -507,7 +532,7 @@ impl DeltaLayer { start_lsn: summary.start_lsn, end_lsn: summary.end_lsn, dropped: summary.dropped, - inner: Mutex::new(DeltaLayerInner { + inner: RwLock::new(DeltaLayerInner { loaded: false, book: None, page_version_metas: VecMap::default(), @@ -689,7 +714,7 @@ impl DeltaLayerWriter { start_lsn: self.start_lsn, end_lsn: self.end_lsn, dropped: self.dropped, - inner: Mutex::new(DeltaLayerInner { + inner: RwLock::new(DeltaLayerInner { loaded: false, book: None, page_version_metas: VecMap::default(), diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs index c706f58e39..5b8ec46452 100644 --- a/pageserver/src/layered_repository/image_layer.rs +++ b/pageserver/src/layered_repository/image_layer.rs @@ -37,7 +37,7 @@ use std::convert::TryInto; use std::fs; use std::io::{BufWriter, Write}; use std::path::{Path, PathBuf}; -use std::sync::{Mutex, MutexGuard}; +use std::sync::{RwLock, RwLockReadGuard}; use bookfile::{Book, BookWriter, ChapterWriter}; @@ -93,7 +93,7 @@ pub struct ImageLayer { // This entry contains an image of all pages as of this LSN pub lsn: Lsn, - inner: Mutex, + inner: RwLock, } #[derive(Clone)] @@ -273,16 +273,38 @@ impl ImageLayer { } /// - /// Load the contents of the file into memory + /// Open the underlying file and read the metadata into memory, if it's + /// not loaded already. /// - fn load(&self) -> Result> { - // quick exit if already loaded - let mut inner = self.inner.lock().unwrap(); + fn load(&self) -> Result> { + loop { + // Quick exit if already loaded + let inner = self.inner.read().unwrap(); + if inner.book.is_some() { + return Ok(inner); + } - if inner.book.is_some() { - return Ok(inner); + // Need to open the file and load the metadata. Upgrade our lock to + // a write lock. (Or rather, release and re-lock in write mode.) + drop(inner); + let mut inner = self.inner.write().unwrap(); + if inner.book.is_none() { + self.load_inner(&mut inner)?; + } else { + // Another thread loaded it while we were not holding the lock. + } + + // We now have the file open and loaded. There's no function to do + // that in the std library RwLock, so we have to release and re-lock + // in read mode. (To be precise, the lock guard was moved in the + // above call to `load_inner`, so it's already been released). And + // while we do that, another thread could unload again, so we have + // to re-check and retry if that happens. + drop(inner); } + } + fn load_inner(&self, inner: &mut ImageLayerInner) -> Result<()> { let path = self.path(); let file = VirtualFile::open(&path) .with_context(|| format!("Failed to open virtual file '{}'", path.display()))?; @@ -336,7 +358,7 @@ impl ImageLayer { image_type, }; - Ok(inner) + Ok(()) } /// Create an ImageLayer struct representing an existing file on disk @@ -352,7 +374,7 @@ impl ImageLayer { tenantid, seg: filename.seg, lsn: filename.lsn, - inner: Mutex::new(ImageLayerInner { + inner: RwLock::new(ImageLayerInner { book: None, image_type: ImageType::Blocky { num_blocks: 0 }, }), @@ -375,7 +397,7 @@ impl ImageLayer { tenantid: summary.tenantid, seg: summary.seg, lsn: summary.lsn, - inner: Mutex::new(ImageLayerInner { + inner: RwLock::new(ImageLayerInner { book: None, image_type: ImageType::Blocky { num_blocks: 0 }, }), @@ -522,7 +544,7 @@ impl ImageLayerWriter { tenantid: self.tenantid, seg: self.seg, lsn: self.lsn, - inner: Mutex::new(ImageLayerInner { + inner: RwLock::new(ImageLayerInner { book: None, image_type, }), From b8cba059a59f1c5e74cd8160af6aee4658c9744e Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Fri, 25 Mar 2022 20:52:58 +0200 Subject: [PATCH 28/83] temporary disable s3 integration on staging until LSM storge rewrite lands --- .circleci/ansible/deploy.yaml | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) diff --git a/.circleci/ansible/deploy.yaml b/.circleci/ansible/deploy.yaml index 2379ef8510..1f43adf950 100644 --- a/.circleci/ansible/deploy.yaml +++ b/.circleci/ansible/deploy.yaml @@ -91,19 +91,20 @@ tags: - pageserver - - name: update config - when: current_version > remote_version or force_deploy - lineinfile: - path: /storage/pageserver/data/pageserver.toml - line: "{{ item }}" - loop: - - "[remote_storage]" - - "bucket_name = '{{ bucket_name }}'" - - "bucket_region = '{{ bucket_region }}'" - - "prefix_in_bucket = '{{ inventory_hostname }}'" - become: true - tags: - - pageserver + # Temporary disabled until LSM storage rewrite lands + # - name: update config + # when: current_version > remote_version or force_deploy + # lineinfile: + # path: /storage/pageserver/data/pageserver.toml + # line: "{{ item }}" + # loop: + # - "[remote_storage]" + # - "bucket_name = '{{ bucket_name }}'" + # - "bucket_region = '{{ bucket_region }}'" + # - "prefix_in_bucket = '{{ inventory_hostname }}'" + # become: true + # tags: + # - pageserver - name: upload systemd service definition when: current_version > remote_version or force_deploy From 5e04dad3604ddc6da58558425f44c9e6b3f05def Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Fri, 25 Mar 2022 23:42:13 +0200 Subject: [PATCH 29/83] Add more variants of the sequential scan performance tests. More rows, and test with serial and parallel plans. But fewer iterations, so that the tests run in < 1 minutes, and we don't need to mark them as "slow". --- ...est_small_seqscans.py => test_seqscans.py} | 24 ++++++++++++------- 1 file changed, 15 insertions(+), 9 deletions(-) rename test_runner/performance/{test_small_seqscans.py => test_seqscans.py} (65%) diff --git a/test_runner/performance/test_small_seqscans.py b/test_runner/performance/test_seqscans.py similarity index 65% rename from test_runner/performance/test_small_seqscans.py rename to test_runner/performance/test_seqscans.py index b98018ad97..85d0a24510 100644 --- a/test_runner/performance/test_small_seqscans.py +++ b/test_runner/performance/test_seqscans.py @@ -1,8 +1,5 @@ # Test sequential scan speed # -# The test table is large enough (3-4 MB) that it doesn't fit in the compute node -# cache, so the seqscans go to the page server. But small enough that it fits -# into memory in the page server. from contextlib import closing from dataclasses import dataclass from fixtures.zenith_fixtures import ZenithEnv @@ -12,11 +9,18 @@ from fixtures.compare_fixtures import PgCompare import pytest -@pytest.mark.parametrize('rows', [ - pytest.param(100000), - pytest.param(1000000, marks=pytest.mark.slow), -]) -def test_small_seqscans(zenith_with_baseline: PgCompare, rows: int): +@pytest.mark.parametrize( + 'rows,iters,workers', + [ + # The test table is large enough (3-4 MB) that it doesn't fit in the compute node + # cache, so the seqscans go to the page server. But small enough that it fits + # into memory in the page server. + pytest.param(100000, 100, 0), + # Also test with a larger table, with and without parallelism + pytest.param(10000000, 1, 0), + pytest.param(10000000, 1, 4) + ]) +def test_seqscans(zenith_with_baseline: PgCompare, rows: int, iters: int, workers: int): env = zenith_with_baseline with closing(env.pg.connect()) as conn: @@ -36,6 +40,8 @@ def test_small_seqscans(zenith_with_baseline: PgCompare, rows: int): assert int(shared_buffers) < int(table_size) env.zenbenchmark.record("table_size", table_size, 'bytes', MetricReport.TEST_PARAM) + cur.execute(f"set max_parallel_workers_per_gather = {workers}") + with env.record_duration('run'): - for i in range(1000): + for i in range(iters): cur.execute('select count(*) from t;') From 18dfc769d814f9753eb611a85d1ebeb81de0dafe Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Fri, 25 Mar 2022 11:27:21 +0200 Subject: [PATCH 30/83] Use cachepot to cache more rustc builds --- .circleci/config.yml | 15 +++++++++++++-- Dockerfile | 1 - Dockerfile.compute-tools | 9 +++++++-- 3 files changed, 20 insertions(+), 5 deletions(-) diff --git a/.circleci/config.yml b/.circleci/config.yml index d342e7c9f4..f05ad3e816 100644 --- a/.circleci/config.yml +++ b/.circleci/config.yml @@ -111,7 +111,12 @@ jobs: fi export CARGO_INCREMENTAL=0 + export CACHEPOT_BUCKET=zenith-rust-cachepot + export RUSTC_WRAPPER=cachepot + export AWS_ACCESS_KEY_ID="${CACHEPOT_AWS_ACCESS_KEY_ID}" + export AWS_SECRET_ACCESS_KEY="${CACHEPOT_AWS_SECRET_ACCESS_KEY}" "${cov_prefix[@]}" mold -run cargo build $CARGO_FLAGS --bins --tests + cachepot -s - save_cache: name: Save rust cache @@ -464,7 +469,10 @@ jobs: name: Build and push compute-tools Docker image command: | echo $DOCKER_PWD | docker login -u $DOCKER_LOGIN --password-stdin - docker build -t zenithdb/compute-tools:latest -f Dockerfile.compute-tools . + docker build \ + --build-arg AWS_ACCESS_KEY_ID="${CACHEPOT_AWS_ACCESS_KEY_ID}" \ + --build-arg AWS_SECRET_ACCESS_KEY="${CACHEPOT_AWS_SECRET_ACCESS_KEY}" \ + --tag zenithdb/compute-tools:latest -f Dockerfile.compute-tools . docker push zenithdb/compute-tools:latest - run: name: Init postgres submodule @@ -518,7 +526,10 @@ jobs: name: Build and push compute-tools Docker image command: | echo $DOCKER_PWD | docker login -u $DOCKER_LOGIN --password-stdin - docker build -t zenithdb/compute-tools:release -f Dockerfile.compute-tools . + docker build \ + --build-arg AWS_ACCESS_KEY_ID="${CACHEPOT_AWS_ACCESS_KEY_ID}" \ + --build-arg AWS_SECRET_ACCESS_KEY="${CACHEPOT_AWS_SECRET_ACCESS_KEY}" \ + --tag zenithdb/compute-tools:release -f Dockerfile.compute-tools . docker push zenithdb/compute-tools:release - run: name: Init postgres submodule diff --git a/Dockerfile b/Dockerfile index 5e55cd834f..babc3b8e1d 100644 --- a/Dockerfile +++ b/Dockerfile @@ -24,7 +24,6 @@ ARG GIT_VERSION=local ARG CACHEPOT_BUCKET=zenith-rust-cachepot ARG AWS_ACCESS_KEY_ID ARG AWS_SECRET_ACCESS_KEY -#ENV RUSTC_WRAPPER cachepot ENV RUSTC_WRAPPER /usr/local/cargo/bin/cachepot COPY --from=pg-build /pg/tmp_install/include/postgresql/server tmp_install/include/postgresql/server diff --git a/Dockerfile.compute-tools b/Dockerfile.compute-tools index a1f7582ee4..f7672251e6 100644 --- a/Dockerfile.compute-tools +++ b/Dockerfile.compute-tools @@ -1,12 +1,17 @@ # First transient image to build compute_tools binaries # NB: keep in sync with rust image version in .circle/config.yml -FROM rust:1.56.1-slim-buster AS rust-build +FROM zenithdb/build:buster-20220309 AS rust-build WORKDIR /zenith +ARG CACHEPOT_BUCKET=zenith-rust-cachepot +ARG AWS_ACCESS_KEY_ID +ARG AWS_SECRET_ACCESS_KEY +ENV RUSTC_WRAPPER /usr/local/cargo/bin/cachepot + COPY . . -RUN cargo build -p compute_tools --release +RUN cargo build -p compute_tools --release && /usr/local/cargo/bin/cachepot -s # Final image that only has one binary FROM debian:buster-slim From d56a0ee19aeec715f9c839a9bcdc91c650000f1e Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Fri, 25 Mar 2022 11:48:30 +0200 Subject: [PATCH 31/83] Avoid recompiling tests for release profile --- .circleci/config.yml | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/.circleci/config.yml b/.circleci/config.yml index f05ad3e816..513d305b5d 100644 --- a/.circleci/config.yml +++ b/.circleci/config.yml @@ -146,11 +146,13 @@ jobs: command: | if [[ $BUILD_TYPE == "debug" ]]; then cov_prefix=(scripts/coverage "--profraw-prefix=$CIRCLE_JOB" --dir=/tmp/zenith/coverage run) + CARGO_FLAGS= elif [[ $BUILD_TYPE == "release" ]]; then cov_prefix=() + CARGO_FLAGS=--release fi - "${cov_prefix[@]}" cargo test + "${cov_prefix[@]}" cargo test $CARGO_FLAGS # Install the rust binaries, for use by test jobs - run: From 55de0b88f5b02fe4a77d7b78640b51ca9f236baa Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Fri, 25 Mar 2022 23:53:37 +0200 Subject: [PATCH 32/83] Hide remote timeline index access details --- pageserver/src/http/routes.rs | 30 ++++++---- pageserver/src/layered_repository.rs | 10 ++-- pageserver/src/remote_storage.rs | 9 ++- pageserver/src/remote_storage/storage_sync.rs | 58 ++++++++++--------- .../remote_storage/storage_sync/download.rs | 30 +++++----- .../src/remote_storage/storage_sync/index.rs | 34 +++++++++-- .../src/remote_storage/storage_sync/upload.rs | 49 +++++++--------- pageserver/src/repository.rs | 6 +- pageserver/src/tenant_mgr.rs | 10 ++-- pageserver/src/timelines.rs | 25 ++------ 10 files changed, 134 insertions(+), 127 deletions(-) diff --git a/pageserver/src/http/routes.rs b/pageserver/src/http/routes.rs index 3ca8b6334a..13e79f8f55 100644 --- a/pageserver/src/http/routes.rs +++ b/pageserver/src/http/routes.rs @@ -3,7 +3,6 @@ use std::sync::Arc; use anyhow::Result; use hyper::StatusCode; use hyper::{Body, Request, Response, Uri}; -use tokio::sync::RwLock; use tracing::*; use zenith_utils::auth::JwtAuth; use zenith_utils::http::endpoint::attach_openapi_ui; @@ -22,17 +21,14 @@ use zenith_utils::zid::{ZTenantTimelineId, ZTimelineId}; use super::models::{ StatusResponse, TenantCreateRequest, TenantCreateResponse, TimelineCreateRequest, }; -use crate::remote_storage::{schedule_timeline_download, RemoteTimelineIndex}; -use crate::timelines::{ - extract_remote_timeline_info, LocalTimelineInfo, RemoteTimelineInfo, TimelineInfo, -}; +use crate::remote_storage::{schedule_timeline_download, RemoteIndex}; +use crate::timelines::{LocalTimelineInfo, RemoteTimelineInfo, TimelineInfo}; use crate::{config::PageServerConf, tenant_mgr, timelines, ZTenantId}; -#[derive(Debug)] struct State { conf: &'static PageServerConf, auth: Option>, - remote_index: Arc>, + remote_index: RemoteIndex, allowlist_routes: Vec, } @@ -40,7 +36,7 @@ impl State { fn new( conf: &'static PageServerConf, auth: Option>, - remote_index: Arc>, + remote_index: RemoteIndex, ) -> Self { let allowlist_routes = ["/v1/status", "/v1/doc", "/swagger.yml"] .iter() @@ -113,14 +109,24 @@ async fn timeline_list_handler(request: Request) -> Result, .await .map_err(ApiError::from_err)??; - let remote_index = get_state(&request).remote_index.read().await; let mut response_data = Vec::with_capacity(local_timeline_infos.len()); for (timeline_id, local_timeline_info) in local_timeline_infos { response_data.push(TimelineInfo { tenant_id, timeline_id, local: Some(local_timeline_info), - remote: extract_remote_timeline_info(tenant_id, timeline_id, &remote_index), + remote: get_state(&request) + .remote_index + .read() + .await + .timeline_entry(&ZTenantTimelineId { + tenant_id, + timeline_id, + }) + .map(|remote_entry| RemoteTimelineInfo { + remote_consistent_lsn: remote_entry.disk_consistent_lsn(), + awaits_download: remote_entry.get_awaits_download(), + }), }) } @@ -277,7 +283,7 @@ async fn tenant_create_handler(mut request: Request) -> Result) -> Result, ApiError> { pub fn make_router( conf: &'static PageServerConf, auth: Option>, - remote_index: Arc>, + remote_index: RemoteIndex, ) -> RouterBuilder { let spec = include_bytes!("openapi_spec.yml"); let mut router = attach_openapi_ui(endpoint::make_router(), spec, "/swagger.yml", "/v1/doc"); diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index ac0afcb275..bf5f52b18d 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -35,7 +35,7 @@ use self::metadata::{metadata_path, TimelineMetadata, METADATA_FILE_NAME}; use crate::config::PageServerConf; use crate::page_cache; use crate::relish::*; -use crate::remote_storage::{schedule_timeline_checkpoint_upload, RemoteTimelineIndex}; +use crate::remote_storage::{schedule_timeline_checkpoint_upload, RemoteIndex}; use crate::repository::{ BlockNumber, GcResult, Repository, RepositoryTimeline, Timeline, TimelineSyncStatusUpdate, TimelineWriter, ZenithWalRecord, @@ -132,7 +132,7 @@ pub struct LayeredRepository { // provides access to timeline data sitting in the remote storage // supposed to be used for retrieval of remote consistent lsn in walreceiver - remote_index: Arc>, + remote_index: RemoteIndex, /// Makes every timeline to backup their files to remote storage. upload_relishes: bool, @@ -355,8 +355,8 @@ impl Repository for LayeredRepository { Ok(()) } - fn get_remote_index(&self) -> &tokio::sync::RwLock { - self.remote_index.as_ref() + fn get_remote_index(&self) -> &RemoteIndex { + &self.remote_index } } @@ -511,7 +511,7 @@ impl LayeredRepository { conf: &'static PageServerConf, walredo_mgr: Arc, tenantid: ZTenantId, - remote_index: Arc>, + remote_index: RemoteIndex, upload_relishes: bool, ) -> LayeredRepository { LayeredRepository { diff --git a/pageserver/src/remote_storage.rs b/pageserver/src/remote_storage.rs index 6eb7bd910b..bdd6086b94 100644 --- a/pageserver/src/remote_storage.rs +++ b/pageserver/src/remote_storage.rs @@ -89,15 +89,14 @@ use std::{ collections::HashMap, ffi, fs, path::{Path, PathBuf}, - sync::Arc, }; use anyhow::{bail, Context}; -use tokio::{io, sync::RwLock}; +use tokio::io; use tracing::{debug, error, info}; use zenith_utils::zid::{ZTenantId, ZTenantTimelineId, ZTimelineId}; -pub use self::storage_sync::index::{RemoteTimelineIndex, TimelineIndexEntry}; +pub use self::storage_sync::index::{RemoteIndex, TimelineIndexEntry}; pub use self::storage_sync::{schedule_timeline_checkpoint_upload, schedule_timeline_download}; use self::{local_fs::LocalFs, rust_s3::S3}; use crate::layered_repository::ephemeral_file::is_ephemeral_file; @@ -120,7 +119,7 @@ type LocalTimelineInitStatuses = HashMap>, + pub remote_index: RemoteIndex, pub local_timeline_init_statuses: LocalTimelineInitStatuses, } @@ -172,7 +171,7 @@ pub fn start_local_timeline_sync( } Ok(SyncStartupData { local_timeline_init_statuses, - remote_index: Arc::new(RwLock::new(RemoteTimelineIndex::empty())), + remote_index: RemoteIndex::empty(), }) } } diff --git a/pageserver/src/remote_storage/storage_sync.rs b/pageserver/src/remote_storage/storage_sync.rs index b01b152e0a..9fe2ab2847 100644 --- a/pageserver/src/remote_storage/storage_sync.rs +++ b/pageserver/src/remote_storage/storage_sync.rs @@ -25,6 +25,7 @@ //! * all never local state gets scheduled for upload, such timelines are "local" and fully operational //! * the rest of the remote timelines are reported to pageserver, but not downloaded before they are actually accessed in pageserver, //! it may schedule the download on such occasions. +//! Then, the index is shared across pageserver under [`RemoteIndex`] guard to ensure proper synchronization. //! //! The synchronization unit is an archive: a set of timeline files (or relishes) and a special metadata file, all compressed into a blob. //! Currently, there's no way to process an archive partially, if the archive processing fails, it has to be started from zero next time again. @@ -80,10 +81,7 @@ use futures::stream::{FuturesUnordered, StreamExt}; use lazy_static::lazy_static; use tokio::{ runtime::Runtime, - sync::{ - mpsc::{self, UnboundedReceiver}, - RwLock, - }, + sync::mpsc::{self, UnboundedReceiver}, time::{Duration, Instant}, }; use tracing::*; @@ -92,8 +90,8 @@ use self::{ compression::ArchiveHeader, download::{download_timeline, DownloadedTimeline}, index::{ - ArchiveDescription, ArchiveId, RemoteTimeline, RemoteTimelineIndex, TimelineIndexEntry, - TimelineIndexEntryInner, + ArchiveDescription, ArchiveId, RemoteIndex, RemoteTimeline, RemoteTimelineIndex, + TimelineIndexEntry, TimelineIndexEntryInner, }, upload::upload_timeline_checkpoint, }; @@ -392,13 +390,14 @@ pub(super) fn spawn_storage_sync_thread< None } }); - let mut remote_index = - RemoteTimelineIndex::try_parse_descriptions_from_paths(conf, download_paths); + let remote_index = RemoteIndex::try_parse_descriptions_from_paths(conf, download_paths); - let local_timeline_init_statuses = - schedule_first_sync_tasks(&mut remote_index, local_timeline_files); - let remote_index = Arc::new(RwLock::new(remote_index)); - let remote_index_cloned = Arc::clone(&remote_index); + let local_timeline_init_statuses = schedule_first_sync_tasks( + &mut runtime.block_on(remote_index.write()), + local_timeline_files, + ); + + let loop_index = remote_index.clone(); thread_mgr::spawn( ThreadKind::StorageSync, None, @@ -410,7 +409,7 @@ pub(super) fn spawn_storage_sync_thread< runtime, conf, receiver, - remote_index_cloned, + loop_index, storage, max_concurrent_sync, max_sync_errors, @@ -438,14 +437,14 @@ fn storage_sync_loop< runtime: Runtime, conf: &'static PageServerConf, mut receiver: UnboundedReceiver, - index: Arc>, + index: RemoteIndex, storage: S, max_concurrent_sync: NonZeroUsize, max_sync_errors: NonZeroU32, ) { - let remote_assets = Arc::new((storage, Arc::clone(&index))); + let remote_assets = Arc::new((storage, index.clone())); loop { - let index = Arc::clone(&index); + let index = index.clone(); let loop_step = runtime.block_on(async { tokio::select! { new_timeline_states = loop_step( @@ -480,7 +479,7 @@ async fn loop_step< >( conf: &'static PageServerConf, receiver: &mut UnboundedReceiver, - remote_assets: Arc<(S, Arc>)>, + remote_assets: Arc<(S, RemoteIndex)>, max_concurrent_sync: NonZeroUsize, max_sync_errors: NonZeroU32, ) -> HashMap> { @@ -560,7 +559,7 @@ async fn process_task< S: RemoteStorage + Send + Sync + 'static, >( conf: &'static PageServerConf, - remote_assets: Arc<(S, Arc>)>, + remote_assets: Arc<(S, RemoteIndex)>, task: SyncTask, max_sync_errors: NonZeroU32, ) -> Option { @@ -584,7 +583,7 @@ async fn process_task< tokio::time::sleep(Duration::from_secs_f64(seconds_to_wait)).await; } - let remote_index = Arc::clone(&remote_assets.1); + let remote_index = &remote_assets.1; let sync_start = Instant::now(); let sync_name = task.kind.sync_name(); @@ -592,7 +591,7 @@ async fn process_task< SyncKind::Download(download_data) => { let download_result = download_timeline( conf, - remote_assets, + remote_assets.clone(), task.sync_id, download_data, task.retries + 1, @@ -772,7 +771,7 @@ async fn fetch_full_index< P: Send + Sync + 'static, S: RemoteStorage + Send + Sync + 'static, >( - (storage, index): &(S, Arc>), + (storage, index): &(S, RemoteIndex), timeline_dir: &Path, id: ZTenantTimelineId, ) -> anyhow::Result { @@ -808,8 +807,9 @@ async fn fetch_full_index< } }; drop(index_read); // tokio rw lock is not upgradeable - let mut index_write = index.write().await; - index_write + index + .write() + .await .upgrade_timeline_entry(&id, full_index.clone()) .context("cannot upgrade timeline entry in remote index")?; Ok(full_index) @@ -855,7 +855,7 @@ mod test_utils { #[track_caller] pub async fn ensure_correct_timeline_upload( harness: &RepoHarness, - remote_assets: Arc<(LocalFs, Arc>)>, + remote_assets: Arc<(LocalFs, RemoteIndex)>, timeline_id: ZTimelineId, new_upload: NewCheckpoint, ) { @@ -872,7 +872,7 @@ mod test_utils { let (storage, index) = remote_assets.as_ref(); assert_index_descriptions( index, - RemoteTimelineIndex::try_parse_descriptions_from_paths( + &RemoteIndex::try_parse_descriptions_from_paths( harness.conf, remote_assets .0 @@ -914,7 +914,7 @@ mod test_utils { } pub async fn expect_timeline( - index: &Arc>, + index: &RemoteIndex, sync_id: ZTenantTimelineId, ) -> RemoteTimeline { if let Some(TimelineIndexEntryInner::Full(remote_timeline)) = index @@ -934,9 +934,11 @@ mod test_utils { #[track_caller] pub async fn assert_index_descriptions( - index: &Arc>, - expected_index_with_descriptions: RemoteTimelineIndex, + index: &RemoteIndex, + expected_index_with_descriptions: &RemoteIndex, ) { + let expected_index_with_descriptions = expected_index_with_descriptions.read().await; + let index_read = index.read().await; let actual_sync_ids = index_read.all_sync_ids().collect::>(); let expected_sync_ids = expected_index_with_descriptions diff --git a/pageserver/src/remote_storage/storage_sync/download.rs b/pageserver/src/remote_storage/storage_sync/download.rs index e5362b2973..32549c8650 100644 --- a/pageserver/src/remote_storage/storage_sync/download.rs +++ b/pageserver/src/remote_storage/storage_sync/download.rs @@ -3,7 +3,7 @@ use std::{borrow::Cow, collections::BTreeSet, path::PathBuf, sync::Arc}; use anyhow::{ensure, Context}; -use tokio::{fs, sync::RwLock}; +use tokio::fs; use tracing::{debug, error, trace, warn}; use zenith_utils::zid::ZTenantId; @@ -20,8 +20,8 @@ use crate::{ }; use super::{ - index::{ArchiveId, RemoteTimeline, RemoteTimelineIndex}, - TimelineDownload, + index::{ArchiveId, RemoteTimeline}, + RemoteIndex, TimelineDownload, }; /// Timeline download result, with extra data, needed for downloading. @@ -47,7 +47,7 @@ pub(super) async fn download_timeline< S: RemoteStorage + Send + Sync + 'static, >( conf: &'static PageServerConf, - remote_assets: Arc<(S, Arc>)>, + remote_assets: Arc<(S, RemoteIndex)>, sync_id: ZTenantTimelineId, mut download: TimelineDownload, retries: u32, @@ -167,7 +167,7 @@ async fn try_download_archive< tenant_id, timeline_id, }: ZTenantTimelineId, - remote_assets: Arc<(S, Arc>)>, + remote_assets: Arc<(S, RemoteIndex)>, remote_timeline: &RemoteTimeline, archive_id: ArchiveId, files_to_skip: Arc>, @@ -255,16 +255,14 @@ mod tests { let repo_harness = RepoHarness::create("test_download_timeline")?; let sync_id = ZTenantTimelineId::new(repo_harness.tenant_id, TIMELINE_ID); let storage = LocalFs::new(tempdir()?.path().to_owned(), &repo_harness.conf.workdir)?; - let index = Arc::new(RwLock::new( - RemoteTimelineIndex::try_parse_descriptions_from_paths( - repo_harness.conf, - storage - .list() - .await? - .into_iter() - .map(|storage_path| storage.local_path(&storage_path).unwrap()), - ), - )); + let index = RemoteIndex::try_parse_descriptions_from_paths( + repo_harness.conf, + storage + .list() + .await? + .into_iter() + .map(|storage_path| storage.local_path(&storage_path).unwrap()), + ); let remote_assets = Arc::new((storage, index)); let storage = &remote_assets.0; let index = &remote_assets.1; @@ -314,7 +312,7 @@ mod tests { .await; assert_index_descriptions( index, - RemoteTimelineIndex::try_parse_descriptions_from_paths( + &RemoteIndex::try_parse_descriptions_from_paths( repo_harness.conf, remote_assets .0 diff --git a/pageserver/src/remote_storage/storage_sync/index.rs b/pageserver/src/remote_storage/storage_sync/index.rs index 7d6b4881f7..d7bd1f1657 100644 --- a/pageserver/src/remote_storage/storage_sync/index.rs +++ b/pageserver/src/remote_storage/storage_sync/index.rs @@ -7,10 +7,12 @@ use std::{ collections::{BTreeMap, BTreeSet, HashMap}, path::{Path, PathBuf}, + sync::Arc, }; use anyhow::{bail, ensure, Context}; use serde::{Deserialize, Serialize}; +use tokio::sync::RwLock; use tracing::*; use zenith_utils::{ lsn::Lsn, @@ -55,11 +57,14 @@ pub struct RemoteTimelineIndex { timeline_entries: HashMap, } -impl RemoteTimelineIndex { +/// A wrapper to synchrnize access to the index, should be created and used before dealing with any [`RemoteTimelineIndex`]. +pub struct RemoteIndex(Arc>); + +impl RemoteIndex { pub fn empty() -> Self { - Self { + Self(Arc::new(RwLock::new(RemoteTimelineIndex { timeline_entries: HashMap::new(), - } + }))) } /// Attempts to parse file paths (not checking the file contents) and find files @@ -69,7 +74,9 @@ impl RemoteTimelineIndex { conf: &'static PageServerConf, paths: impl Iterator, ) -> Self { - let mut index = Self::empty(); + let mut index = RemoteTimelineIndex { + timeline_entries: HashMap::new(), + }; for path in paths { if let Err(e) = try_parse_index_entry(&mut index, conf, path.as_ref()) { debug!( @@ -79,9 +86,26 @@ impl RemoteTimelineIndex { ); } } - index + + Self(Arc::new(RwLock::new(index))) } + pub async fn read(&self) -> tokio::sync::RwLockReadGuard<'_, RemoteTimelineIndex> { + self.0.read().await + } + + pub async fn write(&self) -> tokio::sync::RwLockWriteGuard<'_, RemoteTimelineIndex> { + self.0.write().await + } +} + +impl Clone for RemoteIndex { + fn clone(&self) -> Self { + Self(Arc::clone(&self.0)) + } +} + +impl RemoteTimelineIndex { pub fn timeline_entry(&self, id: &ZTenantTimelineId) -> Option<&TimelineIndexEntry> { self.timeline_entries.get(id) } diff --git a/pageserver/src/remote_storage/storage_sync/upload.rs b/pageserver/src/remote_storage/storage_sync/upload.rs index dfc4433694..76e92c2781 100644 --- a/pageserver/src/remote_storage/storage_sync/upload.rs +++ b/pageserver/src/remote_storage/storage_sync/upload.rs @@ -2,7 +2,6 @@ use std::{borrow::Cow, collections::BTreeSet, path::PathBuf, sync::Arc}; -use tokio::sync::RwLock; use tracing::{debug, error, warn}; use crate::{ @@ -17,7 +16,7 @@ use crate::{ }, }; -use super::{compression::ArchiveHeader, index::RemoteTimelineIndex, NewCheckpoint}; +use super::{compression::ArchiveHeader, NewCheckpoint, RemoteIndex}; /// Attempts to compress and upload given checkpoint files. /// No extra checks for overlapping files is made: download takes care of that, ensuring no non-metadata local timeline files are overwritten. @@ -29,7 +28,7 @@ pub(super) async fn upload_timeline_checkpoint< S: RemoteStorage + Send + Sync + 'static, >( config: &'static PageServerConf, - remote_assets: Arc<(S, Arc>)>, + remote_assets: Arc<(S, RemoteIndex)>, sync_id: ZTenantTimelineId, new_checkpoint: NewCheckpoint, retries: u32, @@ -156,7 +155,7 @@ async fn try_upload_checkpoint< S: RemoteStorage + Send + Sync + 'static, >( config: &'static PageServerConf, - remote_assets: Arc<(S, Arc>)>, + remote_assets: Arc<(S, RemoteIndex)>, sync_id: ZTenantTimelineId, new_checkpoint: &NewCheckpoint, files_to_skip: BTreeSet, @@ -238,16 +237,14 @@ mod tests { let repo_harness = RepoHarness::create("reupload_timeline")?; let sync_id = ZTenantTimelineId::new(repo_harness.tenant_id, TIMELINE_ID); let storage = LocalFs::new(tempdir()?.path().to_owned(), &repo_harness.conf.workdir)?; - let index = Arc::new(RwLock::new( - RemoteTimelineIndex::try_parse_descriptions_from_paths( - repo_harness.conf, - storage - .list() - .await? - .into_iter() - .map(|storage_path| storage.local_path(&storage_path).unwrap()), - ), - )); + let index = RemoteIndex::try_parse_descriptions_from_paths( + repo_harness.conf, + storage + .list() + .await? + .into_iter() + .map(|storage_path| storage.local_path(&storage_path).unwrap()), + ); let remote_assets = Arc::new((storage, index)); let index = &remote_assets.1; @@ -436,16 +433,14 @@ mod tests { let repo_harness = RepoHarness::create("reupload_timeline_rejected")?; let sync_id = ZTenantTimelineId::new(repo_harness.tenant_id, TIMELINE_ID); let storage = LocalFs::new(tempdir()?.path().to_owned(), &repo_harness.conf.workdir)?; - let index = Arc::new(RwLock::new( - RemoteTimelineIndex::try_parse_descriptions_from_paths( - repo_harness.conf, - storage - .list() - .await? - .into_iter() - .map(|storage_path| storage.local_path(&storage_path).unwrap()), - ), - )); + let index = RemoteIndex::try_parse_descriptions_from_paths( + repo_harness.conf, + storage + .list() + .await? + .into_iter() + .map(|storage_path| storage.local_path(&storage_path).unwrap()), + ); let remote_assets = Arc::new((storage, index)); let storage = &remote_assets.0; let index = &remote_assets.1; @@ -464,7 +459,7 @@ mod tests { first_checkpoint, ) .await; - let after_first_uploads = RemoteTimelineIndex::try_parse_descriptions_from_paths( + let after_first_uploads = RemoteIndex::try_parse_descriptions_from_paths( repo_harness.conf, remote_assets .0 @@ -495,7 +490,7 @@ mod tests { 0, ) .await; - assert_index_descriptions(index, after_first_uploads.clone()).await; + assert_index_descriptions(index, &after_first_uploads).await; let checkpoint_with_uploaded_lsn = create_local_timeline( &repo_harness, @@ -511,7 +506,7 @@ mod tests { 0, ) .await; - assert_index_descriptions(index, after_first_uploads.clone()).await; + assert_index_descriptions(index, &after_first_uploads).await; Ok(()) } diff --git a/pageserver/src/repository.rs b/pageserver/src/repository.rs index 074bdf4d01..36273e6d6c 100644 --- a/pageserver/src/repository.rs +++ b/pageserver/src/repository.rs @@ -1,6 +1,6 @@ use crate::layered_repository::metadata::TimelineMetadata; use crate::relish::*; -use crate::remote_storage::RemoteTimelineIndex; +use crate::remote_storage::RemoteIndex; use crate::walrecord::MultiXactMember; use crate::CheckpointConfig; use anyhow::Result; @@ -91,7 +91,7 @@ pub trait Repository: Send + Sync { fn detach_timeline(&self, timeline_id: ZTimelineId) -> Result<()>; // Allows to retrieve remote timeline index from the repo. Used in walreceiver to grab remote consistent lsn. - fn get_remote_index(&self) -> &tokio::sync::RwLock; + fn get_remote_index(&self) -> &RemoteIndex; } /// A timeline, that belongs to the current repository. @@ -407,7 +407,7 @@ pub mod repo_harness { self.conf, walredo_mgr, self.tenant_id, - Arc::new(tokio::sync::RwLock::new(RemoteTimelineIndex::empty())), + RemoteIndex::empty(), false, )); // populate repo with locally available timelines diff --git a/pageserver/src/tenant_mgr.rs b/pageserver/src/tenant_mgr.rs index 0bc18231c9..e7cc4ecbaf 100644 --- a/pageserver/src/tenant_mgr.rs +++ b/pageserver/src/tenant_mgr.rs @@ -3,7 +3,7 @@ use crate::config::PageServerConf; use crate::layered_repository::LayeredRepository; -use crate::remote_storage::RemoteTimelineIndex; +use crate::remote_storage::RemoteIndex; use crate::repository::{Repository, Timeline, TimelineSyncStatusUpdate}; use crate::thread_mgr; use crate::thread_mgr::ThreadKind; @@ -66,7 +66,7 @@ fn access_tenants() -> MutexGuard<'static, HashMap> { pub fn load_local_repo( conf: &'static PageServerConf, tenant_id: ZTenantId, - remote_index: &Arc>, + remote_index: &RemoteIndex, ) -> Arc { let mut m = access_tenants(); let tenant = m.entry(tenant_id).or_insert_with(|| { @@ -78,7 +78,7 @@ pub fn load_local_repo( conf, Arc::new(walredo_mgr), tenant_id, - Arc::clone(remote_index), + remote_index.clone(), conf.remote_storage_config.is_some(), )); Tenant { @@ -92,7 +92,7 @@ pub fn load_local_repo( /// Updates tenants' repositories, changing their timelines state in memory. pub fn apply_timeline_sync_status_updates( conf: &'static PageServerConf, - remote_index: Arc>, + remote_index: RemoteIndex, sync_status_updates: HashMap>, ) { if sync_status_updates.is_empty() { @@ -172,7 +172,7 @@ pub fn shutdown_all_tenants() { pub fn create_tenant_repository( conf: &'static PageServerConf, tenantid: ZTenantId, - remote_index: Arc>, + remote_index: RemoteIndex, ) -> Result> { match access_tenants().entry(tenantid) { Entry::Occupied(_) => { diff --git a/pageserver/src/timelines.rs b/pageserver/src/timelines.rs index 8c018ce70f..53c4124701 100644 --- a/pageserver/src/timelines.rs +++ b/pageserver/src/timelines.rs @@ -15,13 +15,13 @@ use std::{ use tracing::*; use zenith_utils::lsn::Lsn; -use zenith_utils::zid::{ZTenantId, ZTenantTimelineId, ZTimelineId}; +use zenith_utils::zid::{ZTenantId, ZTimelineId}; use zenith_utils::{crashsafe_dir, logging}; use crate::{ config::PageServerConf, layered_repository::metadata::TimelineMetadata, - remote_storage::RemoteTimelineIndex, + remote_storage::RemoteIndex, repository::{LocalTimelineState, Repository}, }; use crate::{import_datadir, LOG_FILE_NAME}; @@ -127,22 +127,6 @@ pub struct TimelineInfo { pub remote: Option, } -pub fn extract_remote_timeline_info( - tenant_id: ZTenantId, - timeline_id: ZTimelineId, - remote_index: &RemoteTimelineIndex, -) -> Option { - remote_index - .timeline_entry(&ZTenantTimelineId { - tenant_id, - timeline_id, - }) - .map(|remote_entry| RemoteTimelineInfo { - remote_consistent_lsn: remote_entry.disk_consistent_lsn(), - awaits_download: remote_entry.get_awaits_download(), - }) -} - #[derive(Debug, Clone, Copy)] pub struct PointInTime { pub timeline_id: ZTimelineId, @@ -179,7 +163,7 @@ pub fn init_pageserver( pub enum CreateRepo { Real { wal_redo_manager: Arc, - remote_index: Arc>, + remote_index: RemoteIndex, }, Dummy, } @@ -207,8 +191,7 @@ pub fn create_repo( // anymore, but I think that could still happen. let wal_redo_manager = Arc::new(crate::walredo::DummyRedoManager {}); - let remote_index = Arc::new(tokio::sync::RwLock::new(RemoteTimelineIndex::empty())); - (wal_redo_manager as _, remote_index) + (wal_redo_manager as _, RemoteIndex::empty()) } }; From 07342f751902b06b253847065f24ddca735e00b3 Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Mon, 28 Mar 2022 13:03:46 +0300 Subject: [PATCH 33/83] Major storage format rewrite. This is a backwards-incompatible change. The new pageserver cannot read repositories created with an old pageserver binary, or vice versa. Simplify Repository to a value-store ------------------------------------ Move the responsibility of tracking relation metadata, like which relations exist and what are their sizes, from Repository to a new module, pgdatadir_mapping.rs. The interface to Repository is now a simple key-value PUT/GET operations. It's still not any old key-value store though. A Repository is still responsible from handling branching, and every GET operation comes with an LSN. Mapping from Postgres data directory to keys/values --------------------------------------------------- All the data is now stored in the key-value store. The 'pgdatadir_mapping.rs' module handles mapping from PostgreSQL objects like relation pages and SLRUs, to key-value pairs. The key to the Repository key-value store is a Key struct, which consists of a few integer fields. It's wide enough to store a full RelFileNode, fork and block number, and to distinguish those from metadata keys. 'pgdatadir_mapping.rs' is also responsible for maintaining a "partitioning" of the keyspace. Partitioning means splitting the keyspace so that each partition holds a roughly equal number of keys. The partitioning is used when new image layer files are created, so that each image layer file is roughly the same size. The partitioning is also responsible for reclaiming space used by deleted keys. The Repository implementation doesn't have any explicit support for deleting keys. Instead, the deleted keys are simply omitted from the partitioning, and when a new image layer is created, the omitted keys are not copied over to the new image layer. We might want to implement tombstone keys in the future, to reclaim space faster, but this will work for now. Changes to low-level layer file code ------------------------------------ The concept of a "segment" is gone. Each layer file can now store an arbitrary range of Keys. Checkpointing, compaction ------------------------- The background tasks are somewhat different now. Whenever checkpoint_distance is reached, the WAL receiver thread "freezes" the current in-memory layer, and creates a new one. This is a quick operation and doesn't perform any I/O yet. It then launches a background "layer flushing thread" to write the frozen layer to disk, as a new L0 delta layer. This mechanism takes care of durability. It replaces the checkpointing thread. Compaction is a new background operation that takes a bunch of L0 delta layers, and reshuffles the data in them. It runs in a separate compaction thread. Deployment ---------- This also contains changes to the ansible scripts that enable having multiple different pageservers running at the same time in the staging environment. We will use that to keep an old version of the pageserver running, for clusters created with the old version, at the same time with a new pageserver with the new binary. Author: Heikki Linnakangas Author: Konstantin Knizhnik Author: Andrey Taranik Reviewed-by: Matthias Van De Meent Reviewed-by: Bojan Serafimov Reviewed-by: Konstantin Knizhnik Reviewed-by: Anton Shyrabokau Reviewed-by: Dhammika Pathirana Reviewed-by: Kirill Bulatov Reviewed-by: Anastasia Lubennikova Reviewed-by: Alexey Kondratov --- .circleci/ansible/.gitignore | 2 + .circleci/ansible/deploy.yaml | 71 +- .circleci/ansible/production.hosts | 17 +- .circleci/ansible/scripts/init_pageserver.sh | 30 + .circleci/ansible/staging.hosts | 18 +- .circleci/config.yml | 2 +- Cargo.lock | 1 + docs/glossary.md | 55 +- docs/rfcs/014-storage-lsm.md | 145 ++ docs/settings.md | 8 +- pageserver/Cargo.toml | 1 + pageserver/src/basebackup.rs | 143 +- pageserver/src/bin/pageserver.rs | 2 +- pageserver/src/config.rs | 43 +- pageserver/src/http/routes.rs | 4 + pageserver/src/import_datadir.rs | 210 +- pageserver/src/keyspace.rs | 134 + pageserver/src/layered_repository.rs | 2242 ++++++++--------- pageserver/src/layered_repository/README.md | 188 +- .../src/layered_repository/delta_layer.rs | 615 +++-- pageserver/src/layered_repository/filename.rs | 300 +-- .../layered_repository/global_layer_map.rs | 142 -- .../src/layered_repository/image_layer.rs | 370 ++- .../src/layered_repository/inmemory_layer.rs | 747 ++---- .../src/layered_repository/interval_tree.rs | 468 ---- .../src/layered_repository/layer_map.rs | 711 +++--- pageserver/src/layered_repository/metadata.rs | 183 +- .../src/layered_repository/storage_layer.rs | 183 +- pageserver/src/lib.rs | 24 +- pageserver/src/page_cache.rs | 17 +- pageserver/src/page_service.rs | 122 +- pageserver/src/pgdatadir_mapping.rs | 1350 ++++++++++ pageserver/src/relish.rs | 226 -- pageserver/src/reltag.rs | 105 + pageserver/src/remote_storage/README.md | 2 +- pageserver/src/remote_storage/local_fs.rs | 2 +- pageserver/src/remote_storage/storage_sync.rs | 6 +- .../storage_sync/compression.rs | 2 +- .../src/remote_storage/storage_sync/index.rs | 2 +- pageserver/src/repository.rs | 1042 +++----- pageserver/src/tenant_mgr.rs | 55 +- pageserver/src/tenant_threads.rs | 28 +- pageserver/src/thread_mgr.rs | 9 +- pageserver/src/timelines.rs | 72 +- pageserver/src/walingest.rs | 965 +++++-- pageserver/src/walreceiver.rs | 24 +- pageserver/src/walrecord.rs | 64 +- pageserver/src/walredo.rs | 170 +- postgres_ffi/src/pg_constants.rs | 4 +- test_runner/batch_others/test_snapfiles_gc.py | 130 - test_runner/fixtures/utils.py | 5 +- vendor/postgres | 2 +- 52 files changed, 5878 insertions(+), 5585 deletions(-) create mode 100644 .circleci/ansible/.gitignore create mode 100644 .circleci/ansible/scripts/init_pageserver.sh create mode 100644 docs/rfcs/014-storage-lsm.md create mode 100644 pageserver/src/keyspace.rs delete mode 100644 pageserver/src/layered_repository/global_layer_map.rs delete mode 100644 pageserver/src/layered_repository/interval_tree.rs create mode 100644 pageserver/src/pgdatadir_mapping.rs delete mode 100644 pageserver/src/relish.rs create mode 100644 pageserver/src/reltag.rs delete mode 100644 test_runner/batch_others/test_snapfiles_gc.py diff --git a/.circleci/ansible/.gitignore b/.circleci/ansible/.gitignore new file mode 100644 index 0000000000..14a1c155ae --- /dev/null +++ b/.circleci/ansible/.gitignore @@ -0,0 +1,2 @@ +zenith_install.tar.gz +.zenith_current_version diff --git a/.circleci/ansible/deploy.yaml b/.circleci/ansible/deploy.yaml index 1f43adf950..020a852a00 100644 --- a/.circleci/ansible/deploy.yaml +++ b/.circleci/ansible/deploy.yaml @@ -1,14 +1,11 @@ - name: Upload Zenith binaries - hosts: pageservers:safekeepers + hosts: storage gather_facts: False remote_user: admin - vars: - force_deploy: false tasks: - name: get latest version of Zenith binaries - ignore_errors: true register: current_version_file set_fact: current_version: "{{ lookup('file', '.zenith_current_version') | trim }}" @@ -16,48 +13,13 @@ - pageserver - safekeeper - - name: set zero value for current_version - when: current_version_file is failed - set_fact: - current_version: "0" - tags: - - pageserver - - safekeeper - - - name: get deployed version from content of remote file - ignore_errors: true - ansible.builtin.slurp: - src: /usr/local/.zenith_current_version - register: remote_version_file - tags: - - pageserver - - safekeeper - - - name: decode remote file content - when: remote_version_file is succeeded - set_fact: - remote_version: "{{ remote_version_file['content'] | b64decode | trim }}" - tags: - - pageserver - - safekeeper - - - name: set zero value for remote_version - when: remote_version_file is failed - set_fact: - remote_version: "0" - tags: - - pageserver - - safekeeper - - name: inform about versions - debug: msg="Version to deploy - {{ current_version }}, version on storage node - {{ remote_version }}" + debug: msg="Version to deploy - {{ current_version }}" tags: - pageserver - safekeeper - - name: upload and extract Zenith binaries to /usr/local - when: current_version > remote_version or force_deploy ansible.builtin.unarchive: owner: root group: root @@ -74,14 +36,24 @@ hosts: pageservers gather_facts: False remote_user: admin - vars: - force_deploy: false tasks: + + - name: upload init script + when: console_mgmt_base_url is defined + ansible.builtin.template: + src: scripts/init_pageserver.sh + dest: /tmp/init_pageserver.sh + owner: root + group: root + mode: '0755' + become: true + tags: + - pageserver + - name: init pageserver - when: current_version > remote_version or force_deploy shell: - cmd: sudo -u pageserver /usr/local/bin/pageserver -c "pg_distrib_dir='/usr/local'" --init -D /storage/pageserver/data + cmd: /tmp/init_pageserver.sh args: creates: "/storage/pageserver/data/tenants" environment: @@ -107,7 +79,6 @@ # - pageserver - name: upload systemd service definition - when: current_version > remote_version or force_deploy ansible.builtin.template: src: systemd/pageserver.service dest: /etc/systemd/system/pageserver.service @@ -119,7 +90,6 @@ - pageserver - name: start systemd service - when: current_version > remote_version or force_deploy ansible.builtin.systemd: daemon_reload: yes name: pageserver @@ -130,7 +100,7 @@ - pageserver - name: post version to console - when: (current_version > remote_version or force_deploy) and console_mgmt_base_url is defined + when: console_mgmt_base_url is defined shell: cmd: | INSTANCE_ID=$(curl -s http://169.254.169.254/latest/meta-data/instance-id) @@ -142,22 +112,18 @@ hosts: safekeepers gather_facts: False remote_user: admin - vars: - force_deploy: false tasks: # in the future safekeepers should discover pageservers byself # but currently use first pageserver that was discovered - name: set first pageserver var for safekeepers - when: current_version > remote_version or force_deploy set_fact: first_pageserver: "{{ hostvars[groups['pageservers'][0]]['inventory_hostname'] }}" tags: - safekeeper - name: upload systemd service definition - when: current_version > remote_version or force_deploy ansible.builtin.template: src: systemd/safekeeper.service dest: /etc/systemd/system/safekeeper.service @@ -169,7 +135,6 @@ - safekeeper - name: start systemd service - when: current_version > remote_version or force_deploy ansible.builtin.systemd: daemon_reload: yes name: safekeeper @@ -180,7 +145,7 @@ - safekeeper - name: post version to console - when: (current_version > remote_version or force_deploy) and console_mgmt_base_url is defined + when: console_mgmt_base_url is defined shell: cmd: | INSTANCE_ID=$(curl -s http://169.254.169.254/latest/meta-data/instance-id) diff --git a/.circleci/ansible/production.hosts b/.circleci/ansible/production.hosts index 3a0543f39a..13224b7cf5 100644 --- a/.circleci/ansible/production.hosts +++ b/.circleci/ansible/production.hosts @@ -1,7 +1,16 @@ [pageservers] -zenith-1-ps-1 bucket_name=zenith-storage-oregon bucket_region=us-west-2 +zenith-1-ps-1 console_region_id=1 [safekeepers] -zenith-1-sk-1 -zenith-1-sk-2 -zenith-1-sk-3 +zenith-1-sk-1 console_region_id=1 +zenith-1-sk-2 console_region_id=1 +zenith-1-sk-3 console_region_id=1 + +[storage:children] +pageservers +safekeepers + +[storage:vars] +console_mgmt_base_url = http://console-release.local +bucket_name = zenith-storage-oregon +bucket_region = us-west-2 diff --git a/.circleci/ansible/scripts/init_pageserver.sh b/.circleci/ansible/scripts/init_pageserver.sh new file mode 100644 index 0000000000..1cbdd0db94 --- /dev/null +++ b/.circleci/ansible/scripts/init_pageserver.sh @@ -0,0 +1,30 @@ +#!/bin/sh + +# get instance id from meta-data service +INSTANCE_ID=$(curl -s http://169.254.169.254/latest/meta-data/instance-id) + +# store fqdn hostname in var +HOST=$(hostname -f) + + +cat < Page ID + + ++---+ +| | Layer file ++---+ +``` + + +# Memtable + +When new WAL arrives, it is first put into the Memtable. Despite the +name, the Memtable is not a purely in-memory data structure. It can +spill to a temporary file on disk if the system is low on memory, and +is accessed through a buffer cache. + +If the page server crashes, the Memtable is lost. It is rebuilt by +processing again the WAL that's newer than the latest layer in L0. + +The size of the Memtable is configured by the "checkpoint distance" +setting. Because anything that hasn't been flushed to disk and +uploaded to S3 yet needs to be kept in the safekeeper, the "checkpoint +distance" also determines the amount of WAL that needs to kept in the +safekeeper. + +# L0 + +When the Memtable fills up, it is written out to a new file in L0. The +files are immutable; when a file is created, it is never +modified. Each file in L0 is roughly 1 GB in size (*). Like the +Memtable, each file in L0 covers the whole key range. + +When enough files have been accumulated in L0, compaction +starts. Compaction processes all the files in L0 and reshuffles the +data to create a new set of files in L1. + + +(*) except in corner cases like if we want to shut down the page +server and want to flush out the memtable to disk even though it's not +full yet. + + +# L1 + +L1 consists of ~ 1 GB files like L0. But each file covers only part of +the overall key space, and a larger range of LSNs. This speeds up +searches. When you're looking for a given page, you need to check all +the files in L0, to see if they contain a page version for the requested +page. But in L1, you only need to check the files whose key range covers +the requested page. This is particularly important at cold start, when +checking a file means downloading it from S3. + +Partitioning by key range also helps with garbage collection. If only a +part of the database is updated, we will accumulate more files for +the hot part in L1, and old files can be removed without affecting the +cold part. + + +# Image layers + +So far, we've only talked about delta layers. In addition to the delta +layers, we create image layers, when "enough" WAL has been accumulated +for some part of the database. Each image layer covers a 1 GB range of +key space. It contains images of the pages at a single LSN, a snapshot +if you will. + +The exact heuristic for what "enough" means is not clear yet. Maybe +create a new image layer when 10 GB of WAL has been accumulated for a +1 GB segment. + +The image layers limit the number of layers that a search needs to +check. That put a cap on read latency, and it also allows garbage +collecting layers that are older than the GC horizon. + + +# Partitioning scheme + +When compaction happens and creates a new set of files in L1, how do +we partition the data into the files? + +- Goal is that each file is ~ 1 GB in size +- Try to match partition boundaries at relation boundaries. (See [1] + for how PebblesDB does this, and for why that's important) +- Greedy algorithm + +# Additional Reading + +[1] Paper on PebblesDB and how it does partitioning. +https://www.cs.utexas.edu/~rak/papers/sosp17-pebblesdb.pdf diff --git a/docs/settings.md b/docs/settings.md index 571cfba8df..69aadc602f 100644 --- a/docs/settings.md +++ b/docs/settings.md @@ -68,11 +68,11 @@ S3. The unit is # of bytes. -#### checkpoint_period +#### compaction_period -The pageserver checks whether `checkpoint_distance` has been reached -every `checkpoint_period` seconds. Default is 1 s, which should be -fine. +Every `compaction_period` seconds, the page server checks if +maintenance operations, like compaction, are needed on the layer +files. Default is 1 s, which should be fine. #### gc_horizon diff --git a/pageserver/Cargo.toml b/pageserver/Cargo.toml index 46e6e2a8f1..de22d0dd77 100644 --- a/pageserver/Cargo.toml +++ b/pageserver/Cargo.toml @@ -12,6 +12,7 @@ bytes = { version = "1.0.1", features = ['serde'] } byteorder = "1.4.3" futures = "0.3.13" hyper = "0.14" +itertools = "0.10.3" lazy_static = "1.4.0" log = "0.4.14" clap = "3.0" diff --git a/pageserver/src/basebackup.rs b/pageserver/src/basebackup.rs index 5711f1807d..e2a56f17d6 100644 --- a/pageserver/src/basebackup.rs +++ b/pageserver/src/basebackup.rs @@ -20,8 +20,9 @@ use std::sync::Arc; use std::time::SystemTime; use tar::{Builder, EntryType, Header}; -use crate::relish::*; +use crate::reltag::SlruKind; use crate::repository::Timeline; +use crate::DatadirTimelineImpl; use postgres_ffi::xlog_utils::*; use postgres_ffi::*; use zenith_utils::lsn::Lsn; @@ -31,7 +32,7 @@ use zenith_utils::lsn::Lsn; /// used for constructing tarball. pub struct Basebackup<'a> { ar: Builder<&'a mut dyn Write>, - timeline: &'a Arc, + timeline: &'a Arc, pub lsn: Lsn, prev_record_lsn: Lsn, } @@ -46,7 +47,7 @@ pub struct Basebackup<'a> { impl<'a> Basebackup<'a> { pub fn new( write: &'a mut dyn Write, - timeline: &'a Arc, + timeline: &'a Arc, req_lsn: Option, ) -> Result> { // Compute postgres doesn't have any previous WAL files, but the first @@ -64,13 +65,13 @@ impl<'a> Basebackup<'a> { // prev_lsn to Lsn(0) if we cannot provide the correct value. let (backup_prev, backup_lsn) = if let Some(req_lsn) = req_lsn { // Backup was requested at a particular LSN. Wait for it to arrive. - timeline.wait_lsn(req_lsn)?; + timeline.tline.wait_lsn(req_lsn)?; // If the requested point is the end of the timeline, we can // provide prev_lsn. (get_last_record_rlsn() might return it as // zero, though, if no WAL has been generated on this timeline // yet.) - let end_of_timeline = timeline.get_last_record_rlsn(); + let end_of_timeline = timeline.tline.get_last_record_rlsn(); if req_lsn == end_of_timeline.last { (end_of_timeline.prev, req_lsn) } else { @@ -78,7 +79,7 @@ impl<'a> Basebackup<'a> { } } else { // Backup was requested at end of the timeline. - let end_of_timeline = timeline.get_last_record_rlsn(); + let end_of_timeline = timeline.tline.get_last_record_rlsn(); (end_of_timeline.prev, end_of_timeline.last) }; @@ -115,21 +116,24 @@ impl<'a> Basebackup<'a> { } // Gather non-relational files from object storage pages. - for obj in self.timeline.list_nonrels(self.lsn)? { - match obj { - RelishTag::Slru { slru, segno } => { - self.add_slru_segment(slru, segno)?; - } - RelishTag::FileNodeMap { spcnode, dbnode } => { - self.add_relmap_file(spcnode, dbnode)?; - } - RelishTag::TwoPhase { xid } => { - self.add_twophase_file(xid)?; - } - _ => {} + for kind in [ + SlruKind::Clog, + SlruKind::MultiXactOffsets, + SlruKind::MultiXactMembers, + ] { + for segno in self.timeline.list_slru_segments(kind, self.lsn)? { + self.add_slru_segment(kind, segno)?; } } + // Create tablespace directories + for ((spcnode, dbnode), has_relmap_file) in self.timeline.list_dbdirs(self.lsn)? { + self.add_dbdir(spcnode, dbnode, has_relmap_file)?; + } + for xid in self.timeline.list_twophase_files(self.lsn)? { + self.add_twophase_file(xid)?; + } + // Generate pg_control and bootstrap WAL segment. self.add_pgcontrol_file()?; self.ar.finish()?; @@ -141,28 +145,14 @@ impl<'a> Basebackup<'a> { // Generate SLRU segment files from repository. // fn add_slru_segment(&mut self, slru: SlruKind, segno: u32) -> anyhow::Result<()> { - let seg_size = self - .timeline - .get_relish_size(RelishTag::Slru { slru, segno }, self.lsn)?; - - let nblocks = match seg_size { - Some(seg_size) => seg_size, - None => { - trace!( - "SLRU segment {}/{:>04X} was truncated", - slru.to_str(), - segno - ); - return Ok(()); - } - }; + let nblocks = self.timeline.get_slru_segment_size(slru, segno, self.lsn)?; let mut slru_buf: Vec = Vec::with_capacity(nblocks as usize * pg_constants::BLCKSZ as usize); for blknum in 0..nblocks { - let img = - self.timeline - .get_page_at_lsn(RelishTag::Slru { slru, segno }, blknum, self.lsn)?; + let img = self + .timeline + .get_slru_page_at_lsn(slru, segno, blknum, self.lsn)?; ensure!(img.len() == pg_constants::BLCKSZ as usize); slru_buf.extend_from_slice(&img); @@ -177,16 +167,26 @@ impl<'a> Basebackup<'a> { } // - // Extract pg_filenode.map files from repository - // Along with them also send PG_VERSION for each database. + // Include database/tablespace directories. // - fn add_relmap_file(&mut self, spcnode: u32, dbnode: u32) -> anyhow::Result<()> { - let img = self.timeline.get_page_at_lsn( - RelishTag::FileNodeMap { spcnode, dbnode }, - 0, - self.lsn, - )?; - let path = if spcnode == pg_constants::GLOBALTABLESPACE_OID { + // Each directory contains a PG_VERSION file, and the default database + // directories also contain pg_filenode.map files. + // + fn add_dbdir( + &mut self, + spcnode: u32, + dbnode: u32, + has_relmap_file: bool, + ) -> anyhow::Result<()> { + let relmap_img = if has_relmap_file { + let img = self.timeline.get_relmap_file(spcnode, dbnode, self.lsn)?; + ensure!(img.len() == 512); + Some(img) + } else { + None + }; + + if spcnode == pg_constants::GLOBALTABLESPACE_OID { let version_bytes = pg_constants::PG_MAJORVERSION.as_bytes(); let header = new_tar_header("PG_VERSION", version_bytes.len() as u64)?; self.ar.append(&header, version_bytes)?; @@ -194,8 +194,32 @@ impl<'a> Basebackup<'a> { let header = new_tar_header("global/PG_VERSION", version_bytes.len() as u64)?; self.ar.append(&header, version_bytes)?; - String::from("global/pg_filenode.map") // filenode map for global tablespace + if let Some(img) = relmap_img { + // filenode map for global tablespace + let header = new_tar_header("global/pg_filenode.map", img.len() as u64)?; + self.ar.append(&header, &img[..])?; + } else { + warn!("global/pg_filenode.map is missing"); + } } else { + // User defined tablespaces are not supported. However, as + // a special case, if a tablespace/db directory is + // completely empty, we can leave it out altogether. This + // makes taking a base backup after the 'tablespace' + // regression test pass, because the test drops the + // created tablespaces after the tests. + // + // FIXME: this wouldn't be necessary, if we handled + // XLOG_TBLSPC_DROP records. But we probably should just + // throw an error on CREATE TABLESPACE in the first place. + if !has_relmap_file + && self + .timeline + .list_rels(spcnode, dbnode, self.lsn)? + .is_empty() + { + return Ok(()); + } // User defined tablespaces are not supported ensure!(spcnode == pg_constants::DEFAULTTABLESPACE_OID); @@ -204,16 +228,17 @@ impl<'a> Basebackup<'a> { let header = new_tar_header_dir(&path)?; self.ar.append(&header, &mut io::empty())?; - let dst_path = format!("base/{}/PG_VERSION", dbnode); - let version_bytes = pg_constants::PG_MAJORVERSION.as_bytes(); - let header = new_tar_header(&dst_path, version_bytes.len() as u64)?; - self.ar.append(&header, version_bytes)?; + if let Some(img) = relmap_img { + let dst_path = format!("base/{}/PG_VERSION", dbnode); + let version_bytes = pg_constants::PG_MAJORVERSION.as_bytes(); + let header = new_tar_header(&dst_path, version_bytes.len() as u64)?; + self.ar.append(&header, version_bytes)?; - format!("base/{}/pg_filenode.map", dbnode) + let relmap_path = format!("base/{}/pg_filenode.map", dbnode); + let header = new_tar_header(&relmap_path, img.len() as u64)?; + self.ar.append(&header, &img[..])?; + } }; - ensure!(img.len() == 512); - let header = new_tar_header(&path, img.len() as u64)?; - self.ar.append(&header, &img[..])?; Ok(()) } @@ -221,9 +246,7 @@ impl<'a> Basebackup<'a> { // Extract twophase state files // fn add_twophase_file(&mut self, xid: TransactionId) -> anyhow::Result<()> { - let img = self - .timeline - .get_page_at_lsn(RelishTag::TwoPhase { xid }, 0, self.lsn)?; + let img = self.timeline.get_twophase_file(xid, self.lsn)?; let mut buf = BytesMut::new(); buf.extend_from_slice(&img[..]); @@ -243,11 +266,11 @@ impl<'a> Basebackup<'a> { fn add_pgcontrol_file(&mut self) -> anyhow::Result<()> { let checkpoint_bytes = self .timeline - .get_page_at_lsn(RelishTag::Checkpoint, 0, self.lsn) + .get_checkpoint(self.lsn) .context("failed to get checkpoint bytes")?; let pg_control_bytes = self .timeline - .get_page_at_lsn(RelishTag::ControlFile, 0, self.lsn) + .get_control_file(self.lsn) .context("failed get control bytes")?; let mut pg_control = ControlFileData::decode(&pg_control_bytes)?; let mut checkpoint = CheckPoint::decode(&checkpoint_bytes)?; @@ -268,7 +291,7 @@ impl<'a> Basebackup<'a> { // add zenith.signal file let mut zenith_signal = String::new(); if self.prev_record_lsn == Lsn(0) { - if self.lsn == self.timeline.get_ancestor_lsn() { + if self.lsn == self.timeline.tline.get_ancestor_lsn() { write!(zenith_signal, "PREV LSN: none")?; } else { write!(zenith_signal, "PREV LSN: invalid")?; diff --git a/pageserver/src/bin/pageserver.rs b/pageserver/src/bin/pageserver.rs index e217806147..0af96cff66 100644 --- a/pageserver/src/bin/pageserver.rs +++ b/pageserver/src/bin/pageserver.rs @@ -20,7 +20,7 @@ use pageserver::{ config::{defaults::*, PageServerConf}, http, page_cache, page_service, remote_storage::{self, SyncStartupData}, - repository::TimelineSyncStatusUpdate, + repository::{Repository, TimelineSyncStatusUpdate}, tenant_mgr, thread_mgr, thread_mgr::ThreadKind, timelines, virtual_file, LOG_FILE_NAME, diff --git a/pageserver/src/config.rs b/pageserver/src/config.rs index dc85c83c17..0fdfb4ceed 100644 --- a/pageserver/src/config.rs +++ b/pageserver/src/config.rs @@ -31,7 +31,8 @@ pub mod defaults { // would be more appropriate. But a low value forces the code to be exercised more, // which is good for now to trigger bugs. pub const DEFAULT_CHECKPOINT_DISTANCE: u64 = 256 * 1024 * 1024; - pub const DEFAULT_CHECKPOINT_PERIOD: &str = "1 s"; + + pub const DEFAULT_COMPACTION_PERIOD: &str = "1 s"; pub const DEFAULT_GC_HORIZON: u64 = 64 * 1024 * 1024; pub const DEFAULT_GC_PERIOD: &str = "100 s"; @@ -57,7 +58,7 @@ pub mod defaults { #listen_http_addr = '{DEFAULT_HTTP_LISTEN_ADDR}' #checkpoint_distance = {DEFAULT_CHECKPOINT_DISTANCE} # in bytes -#checkpoint_period = '{DEFAULT_CHECKPOINT_PERIOD}' +#compaction_period = '{DEFAULT_COMPACTION_PERIOD}' #gc_period = '{DEFAULT_GC_PERIOD}' #gc_horizon = {DEFAULT_GC_HORIZON} @@ -91,7 +92,9 @@ pub struct PageServerConf { // This puts a backstop on how much WAL needs to be re-digested if the // page server crashes. pub checkpoint_distance: u64, - pub checkpoint_period: Duration, + + // How often to check if there's compaction work to be done. + pub compaction_period: Duration, pub gc_horizon: u64, pub gc_period: Duration, @@ -145,7 +148,8 @@ struct PageServerConfigBuilder { listen_http_addr: BuilderValue, checkpoint_distance: BuilderValue, - checkpoint_period: BuilderValue, + + compaction_period: BuilderValue, gc_horizon: BuilderValue, gc_period: BuilderValue, @@ -179,8 +183,8 @@ impl Default for PageServerConfigBuilder { listen_pg_addr: Set(DEFAULT_PG_LISTEN_ADDR.to_string()), listen_http_addr: Set(DEFAULT_HTTP_LISTEN_ADDR.to_string()), checkpoint_distance: Set(DEFAULT_CHECKPOINT_DISTANCE), - checkpoint_period: Set(humantime::parse_duration(DEFAULT_CHECKPOINT_PERIOD) - .expect("cannot parse default checkpoint period")), + compaction_period: Set(humantime::parse_duration(DEFAULT_COMPACTION_PERIOD) + .expect("cannot parse default compaction period")), gc_horizon: Set(DEFAULT_GC_HORIZON), gc_period: Set(humantime::parse_duration(DEFAULT_GC_PERIOD) .expect("cannot parse default gc period")), @@ -216,8 +220,8 @@ impl PageServerConfigBuilder { self.checkpoint_distance = BuilderValue::Set(checkpoint_distance) } - pub fn checkpoint_period(&mut self, checkpoint_period: Duration) { - self.checkpoint_period = BuilderValue::Set(checkpoint_period) + pub fn compaction_period(&mut self, compaction_period: Duration) { + self.compaction_period = BuilderValue::Set(compaction_period) } pub fn gc_horizon(&mut self, gc_horizon: u64) { @@ -286,9 +290,9 @@ impl PageServerConfigBuilder { checkpoint_distance: self .checkpoint_distance .ok_or(anyhow::anyhow!("missing checkpoint_distance"))?, - checkpoint_period: self - .checkpoint_period - .ok_or(anyhow::anyhow!("missing checkpoint_period"))?, + compaction_period: self + .compaction_period + .ok_or(anyhow::anyhow!("missing compaction_period"))?, gc_horizon: self .gc_horizon .ok_or(anyhow::anyhow!("missing gc_horizon"))?, @@ -337,10 +341,10 @@ pub struct RemoteStorageConfig { #[derive(Debug, Clone, PartialEq, Eq)] pub enum RemoteStorageKind { /// Storage based on local file system. - /// Specify a root folder to place all stored relish data into. + /// Specify a root folder to place all stored files into. LocalFs(PathBuf), - /// AWS S3 based storage, storing all relishes into the root - /// of the S3 bucket from the config. + /// AWS S3 based storage, storing all files in the S3 bucket + /// specified by the config AwsS3(S3Config), } @@ -425,7 +429,7 @@ impl PageServerConf { "listen_pg_addr" => builder.listen_pg_addr(parse_toml_string(key, item)?), "listen_http_addr" => builder.listen_http_addr(parse_toml_string(key, item)?), "checkpoint_distance" => builder.checkpoint_distance(parse_toml_u64(key, item)?), - "checkpoint_period" => builder.checkpoint_period(parse_toml_duration(key, item)?), + "compaction_period" => builder.compaction_period(parse_toml_duration(key, item)?), "gc_horizon" => builder.gc_horizon(parse_toml_u64(key, item)?), "gc_period" => builder.gc_period(parse_toml_duration(key, item)?), "wait_lsn_timeout" => builder.wait_lsn_timeout(parse_toml_duration(key, item)?), @@ -561,7 +565,7 @@ impl PageServerConf { PageServerConf { id: ZNodeId(0), checkpoint_distance: defaults::DEFAULT_CHECKPOINT_DISTANCE, - checkpoint_period: Duration::from_secs(10), + compaction_period: Duration::from_secs(10), gc_horizon: defaults::DEFAULT_GC_HORIZON, gc_period: Duration::from_secs(10), wait_lsn_timeout: Duration::from_secs(60), @@ -631,7 +635,8 @@ listen_pg_addr = '127.0.0.1:64000' listen_http_addr = '127.0.0.1:9898' checkpoint_distance = 111 # in bytes -checkpoint_period = '111 s' + +compaction_period = '111 s' gc_period = '222 s' gc_horizon = 222 @@ -668,7 +673,7 @@ id = 10 listen_pg_addr: defaults::DEFAULT_PG_LISTEN_ADDR.to_string(), listen_http_addr: defaults::DEFAULT_HTTP_LISTEN_ADDR.to_string(), checkpoint_distance: defaults::DEFAULT_CHECKPOINT_DISTANCE, - checkpoint_period: humantime::parse_duration(defaults::DEFAULT_CHECKPOINT_PERIOD)?, + compaction_period: humantime::parse_duration(defaults::DEFAULT_COMPACTION_PERIOD)?, gc_horizon: defaults::DEFAULT_GC_HORIZON, gc_period: humantime::parse_duration(defaults::DEFAULT_GC_PERIOD)?, wait_lsn_timeout: humantime::parse_duration(defaults::DEFAULT_WAIT_LSN_TIMEOUT)?, @@ -712,7 +717,7 @@ id = 10 listen_pg_addr: "127.0.0.1:64000".to_string(), listen_http_addr: "127.0.0.1:9898".to_string(), checkpoint_distance: 111, - checkpoint_period: Duration::from_secs(111), + compaction_period: Duration::from_secs(111), gc_horizon: 222, gc_period: Duration::from_secs(222), wait_lsn_timeout: Duration::from_secs(111), diff --git a/pageserver/src/http/routes.rs b/pageserver/src/http/routes.rs index 13e79f8f55..82e818a47b 100644 --- a/pageserver/src/http/routes.rs +++ b/pageserver/src/http/routes.rs @@ -22,6 +22,7 @@ use super::models::{ StatusResponse, TenantCreateRequest, TenantCreateResponse, TimelineCreateRequest, }; use crate::remote_storage::{schedule_timeline_download, RemoteIndex}; +use crate::repository::Repository; use crate::timelines::{LocalTimelineInfo, RemoteTimelineInfo, TimelineInfo}; use crate::{config::PageServerConf, tenant_mgr, timelines, ZTenantId}; @@ -162,8 +163,11 @@ async fn timeline_detail_handler(request: Request) -> Result( path: &Path, - writer: &dyn TimelineWriter, + tline: &mut DatadirTimeline, lsn: Lsn, ) -> Result<()> { let mut pg_control: Option = None; + let mut modification = tline.begin_modification(lsn); + modification.init_empty()?; + // Scan 'global' + let mut relfiles: Vec = Vec::new(); for direntry in fs::read_dir(path.join("global"))? { let direntry = direntry?; match direntry.file_name().to_str() { None => continue, Some("pg_control") => { - pg_control = Some(import_control_file(writer, lsn, &direntry.path())?); + pg_control = Some(import_control_file(&mut modification, &direntry.path())?); + } + Some("pg_filenode.map") => { + import_relmap_file( + &mut modification, + pg_constants::GLOBALTABLESPACE_OID, + 0, + &direntry.path(), + )?; } - Some("pg_filenode.map") => import_nonrel_file( - writer, - lsn, - RelishTag::FileNodeMap { - spcnode: pg_constants::GLOBALTABLESPACE_OID, - dbnode: 0, - }, - &direntry.path(), - )?, - // Load any relation files into the page server - _ => import_relfile( - &direntry.path(), - writer, - lsn, - pg_constants::GLOBALTABLESPACE_OID, - 0, - )?, + // Load any relation files into the page server (but only after the other files) + _ => relfiles.push(direntry.path()), } } + for relfile in relfiles { + import_relfile( + &mut modification, + &relfile, + pg_constants::GLOBALTABLESPACE_OID, + 0, + )?; + } // Scan 'base'. It contains database dirs, the database OID is the filename. // E.g. 'base/12345', where 12345 is the database OID. @@ -76,54 +82,56 @@ pub fn import_timeline_from_postgres_datadir( let dboid = direntry.file_name().to_string_lossy().parse::()?; + let mut relfiles: Vec = Vec::new(); for direntry in fs::read_dir(direntry.path())? { let direntry = direntry?; match direntry.file_name().to_str() { None => continue, - Some("PG_VERSION") => continue, - Some("pg_filenode.map") => import_nonrel_file( - writer, - lsn, - RelishTag::FileNodeMap { - spcnode: pg_constants::DEFAULTTABLESPACE_OID, - dbnode: dboid, - }, + Some("PG_VERSION") => { + //modification.put_dbdir_creation(pg_constants::DEFAULTTABLESPACE_OID, dboid)?; + } + Some("pg_filenode.map") => import_relmap_file( + &mut modification, + pg_constants::DEFAULTTABLESPACE_OID, + dboid, &direntry.path(), )?, // Load any relation files into the page server - _ => import_relfile( - &direntry.path(), - writer, - lsn, - pg_constants::DEFAULTTABLESPACE_OID, - dboid, - )?, + _ => relfiles.push(direntry.path()), } } + for relfile in relfiles { + import_relfile( + &mut modification, + &relfile, + pg_constants::DEFAULTTABLESPACE_OID, + dboid, + )?; + } } for entry in fs::read_dir(path.join("pg_xact"))? { let entry = entry?; - import_slru_file(writer, lsn, SlruKind::Clog, &entry.path())?; + import_slru_file(&mut modification, SlruKind::Clog, &entry.path())?; } for entry in fs::read_dir(path.join("pg_multixact").join("members"))? { let entry = entry?; - import_slru_file(writer, lsn, SlruKind::MultiXactMembers, &entry.path())?; + import_slru_file(&mut modification, SlruKind::MultiXactMembers, &entry.path())?; } for entry in fs::read_dir(path.join("pg_multixact").join("offsets"))? { let entry = entry?; - import_slru_file(writer, lsn, SlruKind::MultiXactOffsets, &entry.path())?; + import_slru_file(&mut modification, SlruKind::MultiXactOffsets, &entry.path())?; } for entry in fs::read_dir(path.join("pg_twophase"))? { let entry = entry?; let xid = u32::from_str_radix(&entry.path().to_string_lossy(), 16)?; - import_nonrel_file(writer, lsn, RelishTag::TwoPhase { xid }, &entry.path())?; + import_twophase_file(&mut modification, xid, &entry.path())?; } // TODO: Scan pg_tblspc // We're done importing all the data files. - writer.advance_last_record_lsn(lsn); + modification.commit()?; // We expect the Postgres server to be shut down cleanly. let pg_control = pg_control.context("pg_control file not found")?; @@ -141,7 +149,7 @@ pub fn import_timeline_from_postgres_datadir( // *after* the checkpoint record. And crucially, it initializes the 'prev_lsn'. import_wal( &path.join("pg_wal"), - writer, + tline, Lsn(pg_control.checkPointCopy.redo), lsn, )?; @@ -150,10 +158,9 @@ pub fn import_timeline_from_postgres_datadir( } // subroutine of import_timeline_from_postgres_datadir(), to load one relation file. -fn import_relfile( +fn import_relfile( + modification: &mut DatadirModification, path: &Path, - timeline: &dyn TimelineWriter, - lsn: Lsn, spcoid: Oid, dboid: Oid, ) -> anyhow::Result<()> { @@ -169,26 +176,35 @@ fn import_relfile( let mut file = File::open(path)?; let mut buf: [u8; 8192] = [0u8; 8192]; + let len = file.metadata().unwrap().len(); + ensure!(len % pg_constants::BLCKSZ as u64 == 0); + let nblocks = len / pg_constants::BLCKSZ as u64; + + if segno != 0 { + todo!(); + } + + let rel = RelTag { + spcnode: spcoid, + dbnode: dboid, + relnode, + forknum, + }; + modification.put_rel_creation(rel, nblocks as u32)?; + let mut blknum: u32 = segno * (1024 * 1024 * 1024 / pg_constants::BLCKSZ as u32); loop { let r = file.read_exact(&mut buf); match r { Ok(_) => { - let rel = RelTag { - spcnode: spcoid, - dbnode: dboid, - relnode, - forknum, - }; - let tag = RelishTag::Relation(rel); - timeline.put_page_image(tag, blknum, lsn, Bytes::copy_from_slice(&buf))?; + modification.put_rel_page_image(rel, blknum, Bytes::copy_from_slice(&buf))?; } // TODO: UnexpectedEof is expected Err(err) => match err.kind() { std::io::ErrorKind::UnexpectedEof => { // reached EOF. That's expected. - // FIXME: maybe check that we read the full length of the file? + ensure!(blknum == nblocks as u32, "unexpected EOF"); break; } _ => { @@ -202,16 +218,28 @@ fn import_relfile( Ok(()) } -/// -/// Import a "non-blocky" file into the repository -/// -/// This is used for small files like the control file, twophase files etc. that -/// are just slurped into the repository as one blob. -/// -fn import_nonrel_file( - timeline: &dyn TimelineWriter, - lsn: Lsn, - tag: RelishTag, +/// Import a relmapper (pg_filenode.map) file into the repository +fn import_relmap_file( + modification: &mut DatadirModification, + spcnode: Oid, + dbnode: Oid, + path: &Path, +) -> Result<()> { + let mut file = File::open(path)?; + let mut buffer = Vec::new(); + // read the whole file + file.read_to_end(&mut buffer)?; + + trace!("importing relmap file {}", path.display()); + + modification.put_relmap_file(spcnode, dbnode, Bytes::copy_from_slice(&buffer[..]))?; + Ok(()) +} + +/// Import a twophase state file (pg_twophase/) into the repository +fn import_twophase_file( + modification: &mut DatadirModification, + xid: TransactionId, path: &Path, ) -> Result<()> { let mut file = File::open(path)?; @@ -221,7 +249,7 @@ fn import_nonrel_file( trace!("importing non-rel file {}", path.display()); - timeline.put_page_image(tag, 0, lsn, Bytes::copy_from_slice(&buffer[..]))?; + modification.put_twophase_file(xid, Bytes::copy_from_slice(&buffer[..]))?; Ok(()) } @@ -230,9 +258,8 @@ fn import_nonrel_file( /// /// The control file is imported as is, but we also extract the checkpoint record /// from it and store it separated. -fn import_control_file( - timeline: &dyn TimelineWriter, - lsn: Lsn, +fn import_control_file( + modification: &mut DatadirModification, path: &Path, ) -> Result { let mut file = File::open(path)?; @@ -243,17 +270,12 @@ fn import_control_file( trace!("importing control file {}", path.display()); // Import it as ControlFile - timeline.put_page_image( - RelishTag::ControlFile, - 0, - lsn, - Bytes::copy_from_slice(&buffer[..]), - )?; + modification.put_control_file(Bytes::copy_from_slice(&buffer[..]))?; // Extract the checkpoint record and import it separately. let pg_control = ControlFileData::decode(&buffer)?; let checkpoint_bytes = pg_control.checkPointCopy.encode(); - timeline.put_page_image(RelishTag::Checkpoint, 0, lsn, checkpoint_bytes)?; + modification.put_checkpoint(checkpoint_bytes)?; Ok(pg_control) } @@ -261,28 +283,34 @@ fn import_control_file( /// /// Import an SLRU segment file /// -fn import_slru_file( - timeline: &dyn TimelineWriter, - lsn: Lsn, +fn import_slru_file( + modification: &mut DatadirModification, slru: SlruKind, path: &Path, ) -> Result<()> { - // Does it look like an SLRU file? + trace!("importing slru file {}", path.display()); + let mut file = File::open(path)?; let mut buf: [u8; 8192] = [0u8; 8192]; let segno = u32::from_str_radix(&path.file_name().unwrap().to_string_lossy(), 16)?; - trace!("importing slru file {}", path.display()); + let len = file.metadata().unwrap().len(); + ensure!(len % pg_constants::BLCKSZ as u64 == 0); // we assume SLRU block size is the same as BLCKSZ + let nblocks = len / pg_constants::BLCKSZ as u64; + + ensure!(nblocks <= pg_constants::SLRU_PAGES_PER_SEGMENT as u64); + + modification.put_slru_segment_creation(slru, segno, nblocks as u32)?; let mut rpageno = 0; loop { let r = file.read_exact(&mut buf); match r { Ok(_) => { - timeline.put_page_image( - RelishTag::Slru { slru, segno }, + modification.put_slru_page_image( + slru, + segno, rpageno, - lsn, Bytes::copy_from_slice(&buf), )?; } @@ -291,7 +319,7 @@ fn import_slru_file( Err(err) => match err.kind() { std::io::ErrorKind::UnexpectedEof => { // reached EOF. That's expected. - // FIXME: maybe check that we read the full length of the file? + ensure!(rpageno == nblocks as u32, "unexpected EOF"); break; } _ => { @@ -300,8 +328,6 @@ fn import_slru_file( }, }; rpageno += 1; - - // TODO: Check that the file isn't unexpectedly large, not larger than SLRU_PAGES_PER_SEGMENT pages } Ok(()) @@ -309,9 +335,9 @@ fn import_slru_file( /// Scan PostgreSQL WAL files in given directory and load all records between /// 'startpoint' and 'endpoint' into the repository. -fn import_wal( +fn import_wal( walpath: &Path, - writer: &dyn TimelineWriter, + tline: &mut DatadirTimeline, startpoint: Lsn, endpoint: Lsn, ) -> Result<()> { @@ -321,7 +347,7 @@ fn import_wal( let mut offset = startpoint.segment_offset(pg_constants::WAL_SEGMENT_SIZE); let mut last_lsn = startpoint; - let mut walingest = WalIngest::new(writer.deref(), startpoint)?; + let mut walingest = WalIngest::new(tline, startpoint)?; while last_lsn <= endpoint { // FIXME: assume postgresql tli 1 for now @@ -354,7 +380,7 @@ fn import_wal( let mut nrecords = 0; while last_lsn <= endpoint { if let Some((lsn, recdata)) = waldecoder.poll_decode()? { - walingest.ingest_record(writer, recdata, lsn)?; + walingest.ingest_record(tline, recdata, lsn)?; last_lsn = lsn; nrecords += 1; diff --git a/pageserver/src/keyspace.rs b/pageserver/src/keyspace.rs new file mode 100644 index 0000000000..9973568b07 --- /dev/null +++ b/pageserver/src/keyspace.rs @@ -0,0 +1,134 @@ +use crate::repository::{key_range_size, singleton_range, Key}; +use postgres_ffi::pg_constants; +use std::ops::Range; + +// Target file size, when creating image and delta layers +pub const TARGET_FILE_SIZE_BYTES: u64 = 128 * 1024 * 1024; // 128 MB + +/// +/// Represents a set of Keys, in a compact form. +/// +#[derive(Clone, Debug)] +pub struct KeySpace { + /// Contiguous ranges of keys that belong to the key space. In key order, + /// and with no overlap. + pub ranges: Vec>, +} + +impl KeySpace { + /// + /// Partition a key space into roughly chunks of roughly 'target_size' bytes + /// in each patition. + /// + pub fn partition(&self, target_size: u64) -> KeyPartitioning { + // Assume that each value is 8k in size. + let target_nblocks = (target_size / pg_constants::BLCKSZ as u64) as usize; + + let mut parts = Vec::new(); + let mut current_part = Vec::new(); + let mut current_part_size: usize = 0; + for range in &self.ranges { + // If appending the next contiguous range in the keyspace to the current + // partition would cause it to be too large, start a new partition. + let this_size = key_range_size(range) as usize; + if current_part_size + this_size > target_nblocks && !current_part.is_empty() { + parts.push(KeySpace { + ranges: current_part, + }); + current_part = Vec::new(); + current_part_size = 0; + } + + // If the next range is larger than 'target_size', split it into + // 'target_size' chunks. + let mut remain_size = this_size; + let mut start = range.start; + while remain_size > target_nblocks { + let next = start.add(target_nblocks as u32); + parts.push(KeySpace { + ranges: vec![start..next], + }); + start = next; + remain_size -= target_nblocks + } + current_part.push(start..range.end); + current_part_size += remain_size; + } + + // add last partition that wasn't full yet. + if !current_part.is_empty() { + parts.push(KeySpace { + ranges: current_part, + }); + } + + KeyPartitioning { parts } + } +} + +/// +/// Represents a partitioning of the key space. +/// +/// The only kind of partitioning we do is to partition the key space into +/// partitions that are roughly equal in physical size (see KeySpace::partition). +/// But this data structure could represent any partitioning. +/// +#[derive(Clone, Debug, Default)] +pub struct KeyPartitioning { + pub parts: Vec, +} + +impl KeyPartitioning { + pub fn new() -> Self { + KeyPartitioning { parts: Vec::new() } + } +} + +/// +/// A helper object, to collect a set of keys and key ranges into a KeySpace +/// object. This takes care of merging adjacent keys and key ranges into +/// contiguous ranges. +/// +#[derive(Clone, Debug, Default)] +pub struct KeySpaceAccum { + accum: Option>, + + ranges: Vec>, +} + +impl KeySpaceAccum { + pub fn new() -> Self { + Self { + accum: None, + ranges: Vec::new(), + } + } + + pub fn add_key(&mut self, key: Key) { + self.add_range(singleton_range(key)) + } + + pub fn add_range(&mut self, range: Range) { + match self.accum.as_mut() { + Some(accum) => { + if range.start == accum.end { + accum.end = range.end; + } else { + assert!(range.start > accum.end); + self.ranges.push(accum.clone()); + *accum = range; + } + } + None => self.accum = Some(range), + } + } + + pub fn to_keyspace(mut self) -> KeySpace { + if let Some(accum) = self.accum.take() { + self.ranges.push(accum); + } + KeySpace { + ranges: self.ranges, + } + } +} diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index bf5f52b18d..837298a10e 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -14,32 +14,33 @@ use anyhow::{anyhow, bail, ensure, Context, Result}; use bookfile::Book; use bytes::Bytes; +use fail::fail_point; +use itertools::Itertools; use lazy_static::lazy_static; -use postgres_ffi::pg_constants::BLCKSZ; use tracing::*; -use std::cmp; +use std::cmp::{max, min, Ordering}; use std::collections::hash_map::Entry; +use std::collections::BTreeSet; use std::collections::HashMap; -use std::collections::{BTreeSet, HashSet}; use std::fs; use std::fs::{File, OpenOptions}; use std::io::Write; -use std::ops::{Bound::Included, Deref}; +use std::ops::{Bound::Included, Deref, Range}; use std::path::{Path, PathBuf}; -use std::sync::atomic::{self, AtomicBool, AtomicUsize}; -use std::sync::{Arc, Mutex, MutexGuard, RwLock, RwLockReadGuard}; +use std::sync::atomic::{self, AtomicBool}; +use std::sync::{Arc, Mutex, MutexGuard, RwLock, RwLockReadGuard, TryLockError}; use std::time::Instant; use self::metadata::{metadata_path, TimelineMetadata, METADATA_FILE_NAME}; use crate::config::PageServerConf; +use crate::keyspace::{KeyPartitioning, KeySpace}; use crate::page_cache; -use crate::relish::*; use crate::remote_storage::{schedule_timeline_checkpoint_upload, RemoteIndex}; use crate::repository::{ - BlockNumber, GcResult, Repository, RepositoryTimeline, Timeline, TimelineSyncStatusUpdate, - TimelineWriter, ZenithWalRecord, + GcResult, Repository, RepositoryTimeline, Timeline, TimelineSyncStatusUpdate, TimelineWriter, }; +use crate::repository::{Key, Value}; use crate::thread_mgr; use crate::virtual_file::VirtualFile; use crate::walreceiver::IS_WAL_RECEIVER; @@ -48,7 +49,6 @@ use crate::CheckpointConfig; use crate::{ZTenantId, ZTimelineId}; use zenith_metrics::{register_histogram_vec, Histogram, HistogramVec}; -use zenith_metrics::{register_int_gauge_vec, IntGauge, IntGaugeVec}; use zenith_utils::crashsafe_dir; use zenith_utils::lsn::{AtomicLsn, Lsn, RecordLsn}; use zenith_utils::seqwait::SeqWait; @@ -56,30 +56,25 @@ use zenith_utils::seqwait::SeqWait; mod delta_layer; pub(crate) mod ephemeral_file; mod filename; -mod global_layer_map; mod image_layer; mod inmemory_layer; -mod interval_tree; mod layer_map; pub mod metadata; mod par_fsync; mod storage_layer; -use delta_layer::DeltaLayer; +use delta_layer::{DeltaLayer, DeltaLayerWriter}; use ephemeral_file::is_ephemeral_file; use filename::{DeltaFileName, ImageFileName}; -use image_layer::ImageLayer; +use image_layer::{ImageLayer, ImageLayerWriter}; use inmemory_layer::InMemoryLayer; use layer_map::LayerMap; -use storage_layer::{ - Layer, PageReconstructData, PageReconstructResult, SegmentBlk, SegmentTag, RELISH_SEG_SIZE, -}; +use layer_map::SearchResult; +use storage_layer::{Layer, ValueReconstructResult, ValueReconstructState}; // re-export this function so that page_cache.rs can use it. pub use crate::layered_repository::ephemeral_file::writeback as writeback_ephemeral_file; -static ZERO_PAGE: Bytes = Bytes::from_static(&[0u8; 8192]); - // Metrics collected on operations on the storage repository. lazy_static! { static ref STORAGE_TIME: HistogramVec = register_histogram_vec!( @@ -100,17 +95,6 @@ lazy_static! { .expect("failed to define a metric"); } -lazy_static! { - // NOTE: can be zero if pageserver was restarted and there hasn't been any - // activity yet. - static ref LOGICAL_TIMELINE_SIZE: IntGaugeVec = register_int_gauge_vec!( - "pageserver_logical_timeline_size", - "Logical timeline size (bytes)", - &["tenant_id", "timeline_id"] - ) - .expect("failed to define a metric"); -} - /// Parts of the `.zenith/tenants//timelines/` directory prefix. pub const TIMELINES_SEGMENT_NAME: &str = "timelines"; @@ -118,7 +102,7 @@ pub const TIMELINES_SEGMENT_NAME: &str = "timelines"; /// Repository consists of multiple timelines. Keep them in a hash table. /// pub struct LayeredRepository { - conf: &'static PageServerConf, + pub conf: &'static PageServerConf, tenantid: ZTenantId, timelines: Mutex>, // This mutex prevents creation of new timelines during GC. @@ -135,21 +119,23 @@ pub struct LayeredRepository { remote_index: RemoteIndex, /// Makes every timeline to backup their files to remote storage. - upload_relishes: bool, + upload_layers: bool, } /// Public interface impl Repository for LayeredRepository { - fn get_timeline(&self, timelineid: ZTimelineId) -> Option { + type Timeline = LayeredTimeline; + + fn get_timeline(&self, timelineid: ZTimelineId) -> Option> { let timelines = self.timelines.lock().unwrap(); self.get_timeline_internal(timelineid, &timelines) .map(RepositoryTimeline::from) } - fn get_timeline_load(&self, timelineid: ZTimelineId) -> Result> { + fn get_timeline_load(&self, timelineid: ZTimelineId) -> Result> { let mut timelines = self.timelines.lock().unwrap(); match self.get_timeline_load_internal(timelineid, &mut timelines)? { - Some(local_loaded_timeline) => Ok(local_loaded_timeline as _), + Some(local_loaded_timeline) => Ok(local_loaded_timeline), None => anyhow::bail!( "cannot get local timeline: unknown timeline id: {}", timelineid @@ -157,7 +143,7 @@ impl Repository for LayeredRepository { } } - fn list_timelines(&self) -> Vec<(ZTimelineId, RepositoryTimeline)> { + fn list_timelines(&self) -> Vec<(ZTimelineId, RepositoryTimeline)> { self.timelines .lock() .unwrap() @@ -175,7 +161,7 @@ impl Repository for LayeredRepository { &self, timelineid: ZTimelineId, initdb_lsn: Lsn, - ) -> Result> { + ) -> Result> { let mut timelines = self.timelines.lock().unwrap(); // Create the timeline directory, and write initial metadata to file. @@ -191,9 +177,9 @@ impl Repository for LayeredRepository { timelineid, self.tenantid, Arc::clone(&self.walredo_mgr), - 0, - self.upload_relishes, + self.upload_layers, ); + timeline.layers.lock().unwrap().next_open_layer_at = Some(initdb_lsn); let timeline = Arc::new(timeline); let r = timelines.insert( @@ -282,13 +268,46 @@ impl Repository for LayeredRepository { }) } - fn checkpoint_iteration(&self, cconf: CheckpointConfig) -> Result<()> { + fn compaction_iteration(&self) -> Result<()> { + // Scan through the hashmap and collect a list of all the timelines, + // while holding the lock. Then drop the lock and actually perform the + // compactions. We don't want to block everything else while the + // compaction runs. + let timelines = self.timelines.lock().unwrap(); + let timelines_to_compact = timelines + .iter() + .map(|(timelineid, timeline)| (*timelineid, timeline.clone())) + .collect::>(); + drop(timelines); + + for (timelineid, timeline) in &timelines_to_compact { + let _entered = + info_span!("compact", timeline = %timelineid, tenant = %self.tenantid).entered(); + match timeline { + LayeredTimelineEntry::Loaded(timeline) => { + timeline.compact()?; + } + LayeredTimelineEntry::Unloaded { .. } => { + debug!("Cannot compact remote timeline {}", timelineid) + } + } + } + + Ok(()) + } + + /// + /// Flush all in-memory data to disk. + /// + /// Used at shutdown. + /// + fn checkpoint(&self) -> Result<()> { // Scan through the hashmap and collect a list of all the timelines, // while holding the lock. Then drop the lock and actually perform the // checkpoints. We don't want to block everything else while the // checkpoint runs. let timelines = self.timelines.lock().unwrap(); - let timelines_to_checkpoint = timelines + let timelines_to_compact = timelines .iter() // filter to get only loaded timelines .filter_map(|(timelineid, entry)| match entry { @@ -302,10 +321,10 @@ impl Repository for LayeredRepository { .collect::>(); drop(timelines); - for (timelineid, timeline) in &timelines_to_checkpoint { + for (timelineid, timeline) in &timelines_to_compact { let _entered = info_span!("checkpoint", timeline = %timelineid, tenant = %self.tenantid).entered(); - timeline.checkpoint(cconf)?; + timeline.checkpoint(CheckpointConfig::Flush)?; } Ok(()) @@ -403,7 +422,7 @@ impl LayeredTimelineEntry { } } -impl From for RepositoryTimeline { +impl From for RepositoryTimeline { fn from(entry: LayeredTimelineEntry) -> Self { match entry { LayeredTimelineEntry::Loaded(timeline) => RepositoryTimeline::Loaded(timeline as _), @@ -489,20 +508,18 @@ impl LayeredRepository { let _enter = info_span!("loading timeline", timeline = %timelineid, tenant = %self.tenantid) .entered(); - let mut timeline = LayeredTimeline::new( + let timeline = LayeredTimeline::new( self.conf, metadata, ancestor, timelineid, self.tenantid, Arc::clone(&self.walredo_mgr), - 0, // init with 0 and update after layers are loaded, - self.upload_relishes, + self.upload_layers, ); timeline .load_layer_map(disk_consistent_lsn) .context("failed to load layermap")?; - timeline.init_current_logical_size()?; Ok(Arc::new(timeline)) } @@ -512,7 +529,7 @@ impl LayeredRepository { walredo_mgr: Arc, tenantid: ZTenantId, remote_index: RemoteIndex, - upload_relishes: bool, + upload_layers: bool, ) -> LayeredRepository { LayeredRepository { tenantid, @@ -521,7 +538,7 @@ impl LayeredRepository { gc_cs: Mutex::new(()), walredo_mgr, remote_index, - upload_relishes, + upload_layers, } } @@ -673,7 +690,8 @@ impl LayeredRepository { timeline.checkpoint(CheckpointConfig::Forced)?; info!("timeline {} checkpoint_before_gc done", timelineid); } - let result = timeline.gc_timeline(branchpoints, cutoff)?; + timeline.update_gc_info(branchpoints, cutoff); + let result = timeline.gc()?; totals += result; timelines = self.timelines.lock().unwrap(); @@ -693,6 +711,8 @@ pub struct LayeredTimeline { layers: Mutex, + last_freeze_at: AtomicLsn, + // WAL redo manager walredo_mgr: Arc, @@ -725,33 +745,14 @@ pub struct LayeredTimeline { ancestor_timeline: Option, ancestor_lsn: Lsn, - // this variable indicates how much space is used from user's point of view, - // e.g. we do not account here for multiple versions of data and so on. - // this is counted incrementally based on physical relishes (excluding FileNodeMap) - // current_logical_size is not stored no disk and initialized on timeline creation using - // get_current_logical_size_non_incremental in init_current_logical_size - // this is needed because when we save it in metadata it can become out of sync - // because current_logical_size is consistent on last_record_lsn, not ondisk_consistent_lsn - // NOTE: current_logical_size also includes size of the ancestor - current_logical_size: AtomicUsize, // bytes - - // To avoid calling .with_label_values and formatting the tenant and timeline IDs to strings - // every time the logical size is updated, keep a direct reference to the Gauge here. - // unfortunately it doesnt forward atomic methods like .fetch_add - // so use two fields: actual size and metric - // see https://github.com/zenithdb/zenith/issues/622 for discussion - // TODO: it is possible to combine these two fields into single one using custom metric which uses SeqCst - // ordering for its operations, but involves private modules, and macro trickery - current_logical_size_gauge: IntGauge, - // Metrics histograms reconstruct_time_histo: Histogram, - checkpoint_time_histo: Histogram, - flush_checkpoint_time_histo: Histogram, - forced_checkpoint_time_histo: Histogram, + flush_time_histo: Histogram, + compact_time_histo: Histogram, + create_images_time_histo: Histogram, /// If `true`, will backup its files that appear after each checkpointing to the remote storage. - upload_relishes: AtomicBool, + upload_layers: AtomicBool, /// Ensures layers aren't frozen by checkpointer between /// [`LayeredTimeline::get_layer_for_write`] and layer reads. @@ -760,15 +761,24 @@ pub struct LayeredTimeline { /// to avoid deadlock. write_lock: Mutex<()>, - // Prevent concurrent checkpoints. - // Checkpoints are normally performed by one thread. But checkpoint can also be manually requested by admin - // (that's used in tests), and shutdown also forces a checkpoint. These forced checkpoints run in a different thread - // and could be triggered at the same time as a normal checkpoint. - checkpoint_cs: Mutex<()>, + /// Used to ensure that there is only one thread + layer_flush_lock: Mutex<()>, + + // Prevent concurrent compactions. + // Compactions are normally performed by one thread. But compaction can also be manually + // requested by admin (that's used in tests). These forced compactions run in a different + // thread and could be triggered at the same time as a normal, timed compaction. + compaction_cs: Mutex<()>, // Needed to ensure that we can't create a branch at a point that was already garbage collected latest_gc_cutoff_lsn: RwLock, + // List of child timelines and their branch points. This is needed to avoid + // garbage collecting data that is still needed by the child timelines. + gc_info: RwLock, + + partitioning: RwLock>, + // It may change across major versions so for simplicity // keep it after running initdb for a timeline. // It is needed in checks when we want to error on some operations @@ -778,6 +788,28 @@ pub struct LayeredTimeline { initdb_lsn: Lsn, } +/// +/// Information about how much history needs to be retained, needed by +/// Garbage Collection. +/// +struct GcInfo { + /// Specific LSNs that are needed. + /// + /// Currently, this includes all points where child branches have + /// been forked off from. In the future, could also include + /// explicit user-defined snapshot points. + retain_lsns: Vec, + + /// In addition to 'retain_lsns', keep everything newer than this + /// point. + /// + /// This is calculated by subtracting 'gc_horizon' setting from + /// last-record LSN + /// + /// FIXME: is this inclusive or exclusive? + cutoff: Lsn, +} + /// Public interface functions impl Timeline for LayeredTimeline { fn get_ancestor_lsn(&self) -> Lsn { @@ -815,162 +847,35 @@ impl Timeline for LayeredTimeline { self.latest_gc_cutoff_lsn.read().unwrap() } - /// Look up given page version. - fn get_page_at_lsn(&self, rel: RelishTag, rel_blknum: BlockNumber, lsn: Lsn) -> Result { - if !rel.is_blocky() && rel_blknum != 0 { - bail!( - "invalid request for block {} for non-blocky relish {}", - rel_blknum, - rel - ); - } - debug_assert!(lsn <= self.get_last_record_lsn()); - let (seg, seg_blknum) = SegmentTag::from_blknum(rel, rel_blknum); - - if let Some((layer, lsn)) = self.get_layer_for_read(seg, lsn)? { - self.materialize_page(seg, seg_blknum, lsn, &*layer) - } else { - // FIXME: This can happen if PostgreSQL extends a relation but never writes - // the page. See https://github.com/zenithdb/zenith/issues/841 - // - // Would be nice to detect that situation better. - if seg.segno > 0 && self.get_rel_exists(rel, lsn)? { - warn!("Page {} blk {} at {} not found", rel, rel_blknum, lsn); - return Ok(ZERO_PAGE.clone()); - } - - bail!("segment {} not found at {}", rel, lsn); - } - } - - fn get_relish_size(&self, rel: RelishTag, lsn: Lsn) -> Result> { - if !rel.is_blocky() { - bail!( - "invalid get_relish_size request for non-blocky relish {}", - rel - ); - } + /// Look up the value with the given a key + fn get(&self, key: Key, lsn: Lsn) -> Result { debug_assert!(lsn <= self.get_last_record_lsn()); - let mut segno = 0; - loop { - let seg = SegmentTag { rel, segno }; - - let segsize; - if let Some((layer, lsn)) = self.get_layer_for_read(seg, lsn)? { - segsize = layer.get_seg_size(lsn)?; - trace!("get_seg_size: {} at {} -> {}", seg, lsn, segsize); - } else { - if segno == 0 { - return Ok(None); + // Check the page cache. We will get back the most recent page with lsn <= `lsn`. + // The cached image can be returned directly if there is no WAL between the cached image + // and requested LSN. The cached image can also be used to reduce the amount of WAL needed + // for redo. + let cached_page_img = match self.lookup_cached_page(&key, lsn) { + Some((cached_lsn, cached_img)) => { + match cached_lsn.cmp(&lsn) { + Ordering::Less => {} // there might be WAL between cached_lsn and lsn, we need to check + Ordering::Equal => return Ok(cached_img), // exact LSN match, return the image + Ordering::Greater => panic!(), // the returned lsn should never be after the requested lsn } - segsize = 0; + Some((cached_lsn, cached_img)) } - - if segsize != RELISH_SEG_SIZE { - let result = segno * RELISH_SEG_SIZE + segsize; - return Ok(Some(result)); - } - segno += 1; - } - } - - fn get_rel_exists(&self, rel: RelishTag, lsn: Lsn) -> Result { - debug_assert!(lsn <= self.get_last_record_lsn()); - - let seg = SegmentTag { rel, segno: 0 }; - - let result = if let Some((layer, lsn)) = self.get_layer_for_read(seg, lsn)? { - layer.get_seg_exists(lsn)? - } else { - false + None => None, }; - trace!("get_rel_exists: {} at {} -> {}", rel, lsn, result); - Ok(result) - } - - fn list_rels(&self, spcnode: u32, dbnode: u32, lsn: Lsn) -> Result> { - let request_tag = RelTag { - spcnode, - dbnode, - relnode: 0, - forknum: 0, + let mut reconstruct_state = ValueReconstructState { + records: Vec::new(), + img: cached_page_img, }; - self.list_relishes(Some(request_tag), lsn) - } + self.get_reconstruct_data(key, lsn, &mut reconstruct_state)?; - fn list_nonrels(&self, lsn: Lsn) -> Result> { - info!("list_nonrels called at {}", lsn); - - self.list_relishes(None, lsn) - } - - fn list_relishes(&self, tag: Option, lsn: Lsn) -> Result> { - trace!("list_relishes called at {}", lsn); - debug_assert!(lsn <= self.get_last_record_lsn()); - - // List of all relishes along with a flag that marks if they exist at the given lsn. - let mut all_relishes_map: HashMap = HashMap::new(); - let mut result = HashSet::new(); - let mut timeline = self; - - // Iterate through layers back in time and find the most - // recent state of the relish. Don't add relish to the list - // if newer version is already there. - // - // This most recent version can represent dropped or existing relish. - // We will filter dropped relishes below. - // - loop { - let rels = timeline.layers.lock().unwrap().list_relishes(tag, lsn)?; - - for (&new_relish, &new_relish_exists) in rels.iter() { - match all_relishes_map.entry(new_relish) { - Entry::Occupied(o) => { - trace!( - "Newer version of the object {} is already found: exists {}", - new_relish, - o.get(), - ); - } - Entry::Vacant(v) => { - v.insert(new_relish_exists); - trace!( - "Newer version of the object {} NOT found. Insert NEW: exists {}", - new_relish, - new_relish_exists - ); - } - } - } - - match &timeline.ancestor_timeline { - None => break, - Some(ancestor_entry) => { - timeline = ancestor_entry.ensure_loaded().with_context( - || format!( - "cannot list relishes for timeline {} tenant {} due to its ancestor {} being either unloaded", - self.timelineid, self.tenantid, ancestor_entry.timeline_id(), - ) - )?; - continue; - } - } - } - - // Filter out dropped relishes - for (&new_relish, &new_relish_exists) in all_relishes_map.iter() { - if new_relish_exists { - result.insert(new_relish); - trace!("List object {}", new_relish); - } else { - trace!("Filtered out dropped object {}", new_relish); - } - } - - Ok(result) + self.reconstruct_time_histo + .observe_closure_duration(|| self.reconstruct_value(key, lsn, reconstruct_state)) } /// Public entry point for checkpoint(). All the logic is in the private @@ -978,15 +883,15 @@ impl Timeline for LayeredTimeline { /// metrics collection. fn checkpoint(&self, cconf: CheckpointConfig) -> anyhow::Result<()> { match cconf { - CheckpointConfig::Flush => self - .flush_checkpoint_time_histo - .observe_closure_duration(|| self.checkpoint_internal(0, false)), - CheckpointConfig::Forced => self - .forced_checkpoint_time_histo - .observe_closure_duration(|| self.checkpoint_internal(0, true)), - CheckpointConfig::Distance(distance) => self - .checkpoint_time_histo - .observe_closure_duration(|| self.checkpoint_internal(distance, true)), + CheckpointConfig::Flush => { + self.freeze_inmem_layer(false); + self.flush_frozen_layers(true) + } + CheckpointConfig::Forced => { + self.freeze_inmem_layer(false); + self.flush_frozen_layers(true)?; + self.compact() + } } } @@ -1019,51 +924,24 @@ impl Timeline for LayeredTimeline { self.last_record_lsn.load() } - fn get_current_logical_size(&self) -> usize { - self.current_logical_size.load(atomic::Ordering::Acquire) as usize - } - - fn get_current_logical_size_non_incremental(&self, lsn: Lsn) -> Result { - let mut total_blocks: usize = 0; - - let _enter = info_span!("calc logical size", %lsn).entered(); - - // list of all relations in this timeline, including ancestor timelines - let all_rels = self.list_rels(0, 0, lsn)?; - - for rel in all_rels { - if let Some(size) = self.get_relish_size(rel, lsn)? { - total_blocks += size as usize; - } - } - - let non_rels = self.list_nonrels(lsn)?; - for non_rel in non_rels { - // TODO support TwoPhase - if matches!(non_rel, RelishTag::Slru { slru: _, segno: _ }) { - if let Some(size) = self.get_relish_size(non_rel, lsn)? { - total_blocks += size as usize; - } - } - } - - Ok(total_blocks * BLCKSZ as usize) - } - fn get_disk_consistent_lsn(&self) -> Lsn { self.disk_consistent_lsn.load() } + fn hint_partitioning(&self, partitioning: KeyPartitioning, lsn: Lsn) -> Result<()> { + self.partitioning + .write() + .unwrap() + .replace((partitioning, lsn)); + Ok(()) + } + fn writer<'a>(&'a self) -> Box { Box::new(LayeredTimelineWriter { tl: self, _write_guard: self.write_lock.lock().unwrap(), }) } - - fn upgrade_to_layered_timeline(&self) -> &crate::layered_repository::LayeredTimeline { - self - } } impl LayeredTimeline { @@ -1078,32 +956,28 @@ impl LayeredTimeline { timelineid: ZTimelineId, tenantid: ZTenantId, walredo_mgr: Arc, - current_logical_size: usize, - upload_relishes: bool, + upload_layers: bool, ) -> LayeredTimeline { - let current_logical_size_gauge = LOGICAL_TIMELINE_SIZE - .get_metric_with_label_values(&[&tenantid.to_string(), &timelineid.to_string()]) - .unwrap(); let reconstruct_time_histo = RECONSTRUCT_TIME .get_metric_with_label_values(&[&tenantid.to_string(), &timelineid.to_string()]) .unwrap(); - let checkpoint_time_histo = STORAGE_TIME + let flush_time_histo = STORAGE_TIME .get_metric_with_label_values(&[ - "checkpoint", + "layer flush", &tenantid.to_string(), &timelineid.to_string(), ]) .unwrap(); - let flush_checkpoint_time_histo = STORAGE_TIME + let compact_time_histo = STORAGE_TIME .get_metric_with_label_values(&[ - "flush checkpoint", + "compact", &tenantid.to_string(), &timelineid.to_string(), ]) .unwrap(); - let forced_checkpoint_time_histo = STORAGE_TIME + let create_images_time_histo = STORAGE_TIME .get_metric_with_label_values(&[ - "forced checkpoint", + "create images", &tenantid.to_string(), &timelineid.to_string(), ]) @@ -1124,18 +998,27 @@ impl LayeredTimeline { }), disk_consistent_lsn: AtomicLsn::new(metadata.disk_consistent_lsn().0), + last_freeze_at: AtomicLsn::new(0), + ancestor_timeline: ancestor, ancestor_lsn: metadata.ancestor_lsn(), - current_logical_size: AtomicUsize::new(current_logical_size), - current_logical_size_gauge, + reconstruct_time_histo, - checkpoint_time_histo, - flush_checkpoint_time_histo, - forced_checkpoint_time_histo, - upload_relishes: AtomicBool::new(upload_relishes), + flush_time_histo, + compact_time_histo, + create_images_time_histo, + + upload_layers: AtomicBool::new(upload_layers), write_lock: Mutex::new(()), - checkpoint_cs: Mutex::new(()), + layer_flush_lock: Mutex::new(()), + compaction_cs: Mutex::new(()), + + gc_info: RwLock::new(GcInfo { + retain_lsns: Vec::new(), + cutoff: Lsn(0), + }), + partitioning: RwLock::new(None), latest_gc_cutoff_lsn: RwLock::new(metadata.latest_gc_cutoff_lsn()), initdb_lsn: metadata.initdb_lsn(), @@ -1179,13 +1062,12 @@ impl LayeredTimeline { num_layers += 1; } else if let Some(deltafilename) = DeltaFileName::parse_str(&fname) { // Create a DeltaLayer struct for each delta file. - ensure!(deltafilename.start_lsn < deltafilename.end_lsn); // The end-LSN is exclusive, while disk_consistent_lsn is // inclusive. For example, if disk_consistent_lsn is 100, it is // OK for a delta layer to have end LSN 101, but if the end LSN // is 102, then it might not have been fully flushed to disk // before crash. - if deltafilename.end_lsn > disk_consistent_lsn + 1 { + if deltafilename.lsn_range.end > disk_consistent_lsn + 1 { warn!( "found future delta layer {} on timeline {} disk_consistent_lsn is {}", deltafilename, self.timelineid, disk_consistent_lsn @@ -1212,41 +1094,14 @@ impl LayeredTimeline { } } - info!("loaded layer map with {} layers", num_layers); + layers.next_open_layer_at = Some(Lsn(disk_consistent_lsn.0) + 1); - Ok(()) - } - - /// - /// Used to init current logical size on startup - /// - fn init_current_logical_size(&mut self) -> Result<()> { - if self.current_logical_size.load(atomic::Ordering::Relaxed) != 0 { - bail!("cannot init already initialized current logical size") - }; - let lsn = self.get_last_record_lsn(); - self.current_logical_size = - AtomicUsize::new(self.get_current_logical_size_non_incremental(lsn)?); - trace!( - "current_logical_size initialized to {}", - self.current_logical_size.load(atomic::Ordering::Relaxed) + info!( + "loaded layer map with {} layers at {}", + num_layers, disk_consistent_lsn ); - Ok(()) - } - /// - /// Get a handle to a Layer for reading. - /// - /// The returned Layer might be from an ancestor timeline, if the - /// segment hasn't been updated on this timeline yet. - /// - fn get_layer_for_read( - &self, - seg: SegmentTag, - lsn: Lsn, - ) -> Result, Lsn)>> { - let self_layers = self.layers.lock().unwrap(); - self.get_layer_for_read_locked(seg, lsn, &self_layers) + Ok(()) } /// @@ -1257,88 +1112,160 @@ impl LayeredTimeline { /// /// This function takes the current timeline's locked LayerMap as an argument, /// so callers can avoid potential race conditions. - fn get_layer_for_read_locked( + fn get_reconstruct_data( &self, - seg: SegmentTag, - lsn: Lsn, - self_layers: &MutexGuard, - ) -> anyhow::Result, Lsn)>> { - trace!("get_layer_for_read called for {} at {}", seg, lsn); - - // If you requested a page at an older LSN, before the branch point, dig into - // the right ancestor timeline. This can only happen if you launch a read-only - // node with an old LSN, a primary always uses a recent LSN in its requests. + key: Key, + request_lsn: Lsn, + reconstruct_state: &mut ValueReconstructState, + ) -> anyhow::Result<()> { + // Start from the current timeline. + let mut timeline_owned; let mut timeline = self; - let mut lsn = lsn; - while lsn < timeline.ancestor_lsn { - trace!("going into ancestor {} ", timeline.ancestor_lsn); - timeline = timeline - .ancestor_timeline - .as_ref() - .expect("there should be an ancestor") - .ensure_loaded() - .with_context(|| format!( - "Cannot get the whole layer for read locked: timeline {} is not present locally", - self.get_ancestor_timeline_id().unwrap()) - )?; - } + let mut path: Vec<(ValueReconstructResult, Lsn, Arc)> = Vec::new(); - // Now we have the right starting timeline for our search. - loop { - let layers_owned: MutexGuard; - let layers = if self as *const LayeredTimeline != timeline as *const LayeredTimeline { - layers_owned = timeline.layers.lock().unwrap(); - &layers_owned - } else { - self_layers - }; + // 'prev_lsn' tracks the last LSN that we were at in our search. It's used + // to check that each iteration make some progress, to break infinite + // looping if something goes wrong. + let mut prev_lsn = Lsn(u64::MAX); - // - // FIXME: If the relation has been dropped, does this return the right - // thing? The compute node should not normally request dropped relations, - // but if OID wraparound happens the same relfilenode might get reused - // for an unrelated relation. - // + let mut result = ValueReconstructResult::Continue; + let mut cont_lsn = Lsn(request_lsn.0 + 1); - // Do we have a layer on this timeline? - if let Some(layer) = layers.get(&seg, lsn) { - trace!( - "found layer in cache: {} {}-{}", - timeline.timelineid, - layer.get_start_lsn(), - layer.get_end_lsn() - ); + 'outer: loop { + // The function should have updated 'state' + //info!("CALLED for {} at {}: {:?} with {} records", reconstruct_state.key, reconstruct_state.lsn, result, reconstruct_state.records.len()); + match result { + ValueReconstructResult::Complete => return Ok(()), + ValueReconstructResult::Continue => { + if prev_lsn <= cont_lsn { + // Didn't make any progress in last iteration. Error out to avoid + // getting stuck in the loop. - ensure!(layer.get_start_lsn() <= lsn); - - if layer.is_dropped() && layer.get_end_lsn() <= lsn { - return Ok(None); + // For debugging purposes, print the path of layers that we traversed + // through. + for (r, c, l) in path { + error!( + "PATH: result {:?}, cont_lsn {}, layer: {}", + r, + c, + l.filename().display() + ); + } + bail!("could not find layer with more data for key {} at LSN {}, request LSN {}, ancestor {}", + key, + Lsn(cont_lsn.0 - 1), + request_lsn, + timeline.ancestor_lsn) + } + prev_lsn = cont_lsn; + } + ValueReconstructResult::Missing => { + bail!( + "could not find data for key {} at LSN {}, for request at LSN {}", + key, + cont_lsn, + request_lsn + ) } - - return Ok(Some((layer.clone(), lsn))); } - // If not, check if there's a layer on the ancestor timeline - match &timeline.ancestor_timeline { - Some(ancestor_entry) => { - let ancestor = ancestor_entry - .ensure_loaded() - .context("cannot get a layer for read from ancestor because it is either remote or unloaded")?; - lsn = timeline.ancestor_lsn; - timeline = ancestor; - trace!("recursing into ancestor at {}/{}", timeline.timelineid, lsn); + // Recurse into ancestor if needed + if Lsn(cont_lsn.0 - 1) <= timeline.ancestor_lsn { + trace!( + "going into ancestor {}, cont_lsn is {}", + timeline.ancestor_lsn, + cont_lsn + ); + let ancestor = timeline.get_ancestor_timeline()?; + timeline_owned = ancestor; + timeline = &*timeline_owned; + prev_lsn = Lsn(u64::MAX); + continue; + } + + let layers = timeline.layers.lock().unwrap(); + + // Check the open and frozen in-memory layers first + if let Some(open_layer) = &layers.open_layer { + let start_lsn = open_layer.get_lsn_range().start; + if cont_lsn > start_lsn { + //info!("CHECKING for {} at {} on open layer {}", key, cont_lsn, open_layer.filename().display()); + result = open_layer.get_value_reconstruct_data( + key, + open_layer.get_lsn_range().start..cont_lsn, + reconstruct_state, + )?; + cont_lsn = start_lsn; + path.push((result, cont_lsn, open_layer.clone())); continue; } - None => return Ok(None), + } + for frozen_layer in layers.frozen_layers.iter() { + let start_lsn = frozen_layer.get_lsn_range().start; + if cont_lsn > start_lsn { + //info!("CHECKING for {} at {} on frozen layer {}", key, cont_lsn, frozen_layer.filename().display()); + result = frozen_layer.get_value_reconstruct_data( + key, + frozen_layer.get_lsn_range().start..cont_lsn, + reconstruct_state, + )?; + cont_lsn = start_lsn; + path.push((result, cont_lsn, frozen_layer.clone())); + continue 'outer; + } + } + + if let Some(SearchResult { lsn_floor, layer }) = layers.search(key, cont_lsn)? { + //info!("CHECKING for {} at {} on historic layer {}", key, cont_lsn, layer.filename().display()); + + result = layer.get_value_reconstruct_data( + key, + lsn_floor..cont_lsn, + reconstruct_state, + )?; + cont_lsn = lsn_floor; + path.push((result, cont_lsn, layer)); + } else if self.ancestor_timeline.is_some() { + // Nothing on this timeline. Traverse to parent + result = ValueReconstructResult::Continue; + cont_lsn = Lsn(self.ancestor_lsn.0 + 1); + } else { + // Nothing found + result = ValueReconstructResult::Missing; } } } + fn lookup_cached_page(&self, key: &Key, lsn: Lsn) -> Option<(Lsn, Bytes)> { + let cache = page_cache::get(); + + // FIXME: It's pointless to check the cache for things that are not 8kB pages. + // We should look at the key to determine if it's a cacheable object + let (lsn, read_guard) = + cache.lookup_materialized_page(self.tenantid, self.timelineid, key, lsn)?; + let img = Bytes::from(read_guard.to_vec()); + Some((lsn, img)) + } + + fn get_ancestor_timeline(&self) -> Result> { + let ancestor = self + .ancestor_timeline + .as_ref() + .expect("there should be an ancestor") + .ensure_loaded() + .with_context(|| { + format!( + "Cannot get the whole layer for read locked: timeline {} is not present locally", + self.get_ancestor_timeline_id().unwrap()) + })?; + Ok(Arc::clone(ancestor)) + } + /// /// Get a handle to the latest layer for appending. /// - fn get_layer_for_write(&self, seg: SegmentTag, lsn: Lsn) -> anyhow::Result> { + fn get_layer_for_write(&self, lsn: Lsn) -> anyhow::Result> { let mut layers = self.layers.lock().unwrap(); ensure!(lsn.is_aligned()); @@ -1353,235 +1280,191 @@ impl LayeredTimeline { // Do we have a layer open for writing already? let layer; - if let Some(open_layer) = layers.get_open(&seg) { - if open_layer.get_start_lsn() > lsn { + if let Some(open_layer) = &layers.open_layer { + if open_layer.get_lsn_range().start > lsn { bail!("unexpected open layer in the future"); } - // Open layer exists, but it is dropped, so create a new one. - if open_layer.is_dropped() { - ensure!(!open_layer.is_writeable()); - // Layer that is created after dropped one represents a new relish segment. - trace!( - "creating layer for write for new relish segment after dropped layer {} at {}/{}", - seg, - self.timelineid, - lsn - ); - - layer = InMemoryLayer::create( - self.conf, - self.timelineid, - self.tenantid, - seg, - lsn, - last_record_lsn, - )?; - } else { - return Ok(open_layer); - } - } - // No writeable layer for this relation. Create one. - // - // Is this a completely new relation? Or the first modification after branching? - // - else if let Some((prev_layer, _prev_lsn)) = - self.get_layer_for_read_locked(seg, lsn, &layers)? - { - // Create new entry after the previous one. - let start_lsn; - if prev_layer.get_timeline_id() != self.timelineid { - // First modification on this timeline - start_lsn = self.ancestor_lsn + 1; - trace!( - "creating layer for write for {} at branch point {}", - seg, - start_lsn - ); - } else { - start_lsn = prev_layer.get_end_lsn(); - trace!( - "creating layer for write for {} after previous layer {}", - seg, - start_lsn - ); - } - trace!( - "prev layer is at {}/{} - {}", - prev_layer.get_timeline_id(), - prev_layer.get_start_lsn(), - prev_layer.get_end_lsn() - ); - layer = InMemoryLayer::create_successor_layer( - self.conf, - prev_layer, - self.timelineid, - self.tenantid, - start_lsn, - last_record_lsn, - )?; + layer = Arc::clone(open_layer); } else { - // New relation. + // No writeable layer yet. Create one. + let start_lsn = layers.next_open_layer_at.unwrap(); + trace!( - "creating layer for write for new rel {} at {}/{}", - seg, + "creating layer for write at {}/{} for record at {}", self.timelineid, + start_lsn, lsn ); + let new_layer = + InMemoryLayer::create(self.conf, self.timelineid, self.tenantid, start_lsn)?; + let layer_rc = Arc::new(new_layer); - layer = InMemoryLayer::create( - self.conf, - self.timelineid, - self.tenantid, - seg, - lsn, - last_record_lsn, - )?; + layers.open_layer = Some(Arc::clone(&layer_rc)); + layers.next_open_layer_at = None; + + layer = layer_rc; } + Ok(layer) + } - let layer_rc: Arc = Arc::new(layer); - layers.insert_open(Arc::clone(&layer_rc)); + fn put_value(&self, key: Key, lsn: Lsn, val: Value) -> Result<()> { + //info!("PUT: key {} at {}", key, lsn); + let layer = self.get_layer_for_write(lsn)?; + layer.put_value(key, lsn, val)?; + Ok(()) + } - Ok(layer_rc) + fn put_tombstone(&self, key_range: Range, lsn: Lsn) -> Result<()> { + let layer = self.get_layer_for_write(lsn)?; + layer.put_tombstone(key_range, lsn)?; + + Ok(()) + } + + fn finish_write(&self, new_lsn: Lsn) { + assert!(new_lsn.is_aligned()); + + self.last_record_lsn.advance(new_lsn); + } + + fn freeze_inmem_layer(&self, write_lock_held: bool) { + // Freeze the current open in-memory layer. It will be written to disk on next + // iteration. + let _write_guard = if write_lock_held { + None + } else { + Some(self.write_lock.lock().unwrap()) + }; + let mut layers = self.layers.lock().unwrap(); + if let Some(open_layer) = &layers.open_layer { + let open_layer_rc = Arc::clone(open_layer); + // Does this layer need freezing? + let end_lsn = Lsn(self.get_last_record_lsn().0 + 1); + open_layer.freeze(end_lsn); + + // The layer is no longer open, update the layer map to reflect this. + // We will replace it with on-disk historics below. + layers.frozen_layers.push_back(open_layer_rc); + layers.open_layer = None; + layers.next_open_layer_at = Some(end_lsn); + self.last_freeze_at.store(end_lsn); + } + drop(layers); } /// - /// Flush to disk all data that was written with the put_* functions + /// Check if more than 'checkpoint_distance' of WAL has been accumulated + /// in the in-memory layer, and initiate flushing it if so. /// - /// NOTE: This has nothing to do with checkpoint in PostgreSQL. - fn checkpoint_internal(&self, checkpoint_distance: u64, reconstruct_pages: bool) -> Result<()> { - // Prevent concurrent checkpoints - let _checkpoint_cs = self.checkpoint_cs.lock().unwrap(); - let write_guard = self.write_lock.lock().unwrap(); - let mut layers = self.layers.lock().unwrap(); + pub fn check_checkpoint_distance(self: &Arc) -> Result<()> { + let last_lsn = self.get_last_record_lsn(); - // Bump the generation number in the layer map, so that we can distinguish - // entries inserted after the checkpoint started - let current_generation = layers.increment_generation(); + let distance = last_lsn.widening_sub(self.last_freeze_at.load()); + if distance >= self.conf.checkpoint_distance.into() { + self.freeze_inmem_layer(true); + self.last_freeze_at.store(last_lsn); + } + if let Ok(guard) = self.layer_flush_lock.try_lock() { + drop(guard); + let self_clone = Arc::clone(self); + thread_mgr::spawn( + thread_mgr::ThreadKind::LayerFlushThread, + Some(self.tenantid), + Some(self.timelineid), + "layer flush thread", + false, + move || self_clone.flush_frozen_layers(false), + )?; + } + Ok(()) + } - let RecordLsn { - last: last_record_lsn, - prev: prev_record_lsn, - } = self.last_record_lsn.load(); + /// Flush all frozen layers to disk. + /// + /// Only one thread at a time can be doing layer-flushing for a + /// given timeline. If 'wait' is true, and another thread is + /// currently doing the flushing, this function will wait for it + /// to finish. If 'wait' is false, this function will return + /// immediately instead. + fn flush_frozen_layers(&self, wait: bool) -> Result<()> { + let flush_lock_guard = if wait { + self.layer_flush_lock.lock().unwrap() + } else { + match self.layer_flush_lock.try_lock() { + Ok(guard) => guard, + Err(TryLockError::WouldBlock) => return Ok(()), + Err(TryLockError::Poisoned(err)) => panic!("{:?}", err), + } + }; - trace!("checkpoint starting at {}", last_record_lsn); + let timer = self.flush_time_histo.start_timer(); - // Take the in-memory layer with the oldest WAL record. If it's older - // than the threshold, write it out to disk as a new image and delta file. - // Repeat until all remaining in-memory layers are within the threshold. - // - // That's necessary to limit the amount of WAL that needs to be kept - // in the safekeepers, and that needs to be reprocessed on page server - // crash. TODO: It's not a great policy for keeping memory usage in - // check, though. We should also aim at flushing layers that consume - // a lot of memory and/or aren't receiving much updates anymore. - let mut disk_consistent_lsn = last_record_lsn; - - let mut layer_paths = Vec::new(); - let mut freeze_end_lsn = Lsn(0); - let mut evicted_layers = Vec::new(); - - // - // Determine which layers we need to evict and calculate max(latest_lsn) - // among those layers. - // - while let Some((oldest_layer_id, oldest_layer, oldest_generation)) = - layers.peek_oldest_open() - { - let oldest_lsn = oldest_layer.get_oldest_lsn(); - // Does this layer need freezing? - // - // Write out all in-memory layers that contain WAL older than CHECKPOINT_DISTANCE. - // If we reach a layer with the same - // generation number, we know that we have cycled through all layers that were open - // when we started. We don't want to process layers inserted after we started, to - // avoid getting into an infinite loop trying to process again entries that we - // inserted ourselves. - // - // Once we have decided to write out at least one layer, we must also write out - // any other layers that contain WAL older than the end LSN of the layers we have - // already decided to write out. In other words, we must write out all layers - // whose [oldest_lsn, latest_lsn) range overlaps with any of the other layers - // that we are writing out. Otherwise, when we advance 'disk_consistent_lsn', it's - // ambiguous whether those layers are already durable on disk or not. For example, - // imagine that there are two layers in memory that contain page versions in the - // following LSN ranges: - // - // A: 100-150 - // B: 110-200 - // - // If we flush layer A, we must also flush layer B, because they overlap. If we - // flushed only A, and advanced 'disk_consistent_lsn' to 150, we would break the - // rule that all WAL older than 'disk_consistent_lsn' are durable on disk, because - // B contains some WAL older than 150. On the other hand, if we flushed out A and - // advanced 'disk_consistent_lsn' only up to 110, after crash and restart we would - // delete the first layer because its end LSN is larger than 110. If we changed - // the deletion logic to not delete it, then we would start streaming at 110, and - // process again the WAL records in the range 110-150 that are already in layer A, - // and the WAL processing code does not cope with that. We solve that dilemma by - // insisting that if we write out the first layer, we also write out the second - // layer, and advance disk_consistent_lsn all the way up to 200. - // - let distance = last_record_lsn.widening_sub(oldest_lsn); - if (distance < 0 - || distance < checkpoint_distance.into() - || oldest_generation == current_generation) - && oldest_lsn >= freeze_end_lsn - // this layer intersects with evicted layer and so also need to be evicted - { - debug!( - "the oldest layer is now {} which is {} bytes behind last_record_lsn", - oldest_layer.filename().display(), - distance - ); - disk_consistent_lsn = oldest_lsn; + loop { + let layers = self.layers.lock().unwrap(); + if let Some(frozen_layer) = layers.frozen_layers.front() { + let frozen_layer = Arc::clone(frozen_layer); + drop(layers); // to allow concurrent reads and writes + self.flush_frozen_layer(frozen_layer)?; + } else { + // Drop the 'layer_flush_lock' *before* 'layers'. That + // way, if you freeze a layer, and then call + // flush_frozen_layers(false), it is guaranteed that + // if another thread was busy flushing layers and the + // call therefore returns immediately, the other + // thread will have seen the newly-frozen layer and + // will flush that too (assuming no errors). + drop(flush_lock_guard); + drop(layers); break; } - let latest_lsn = oldest_layer.get_latest_lsn(); - if latest_lsn > freeze_end_lsn { - freeze_end_lsn = latest_lsn; // calculate max of latest_lsn of the layers we're about to evict - } - layers.remove_open(oldest_layer_id); - evicted_layers.push((oldest_layer_id, oldest_layer)); } - // Freeze evicted layers - for (_evicted_layer_id, evicted_layer) in evicted_layers.iter() { - // Mark the layer as no longer accepting writes and record the end_lsn. - // This happens in-place, no new layers are created now. - evicted_layer.freeze(freeze_end_lsn); - layers.insert_historic(evicted_layer.clone()); + timer.stop_and_record(); + + Ok(()) + } + + /// Flush one frozen in-memory layer to disk, as a new delta layer. + fn flush_frozen_layer(&self, frozen_layer: Arc) -> Result<()> { + let new_delta = frozen_layer.write_to_disk()?; + let new_delta_path = new_delta.path(); + + // Sync the new layer to disk. + // + // We must also fsync the timeline dir to ensure the directory entries for + // new layer files are durable + // + // TODO: If we're running inside 'flush_frozen_layers' and there are multiple + // files to flush, it might be better to first write them all, and then fsync + // them all in parallel. + par_fsync::par_fsync(&[ + new_delta_path.clone(), + self.conf.timeline_path(&self.timelineid, &self.tenantid), + ])?; + + // Finally, replace the frozen in-memory layer with the new on-disk layers + { + let mut layers = self.layers.lock().unwrap(); + let l = layers.frozen_layers.pop_front(); + + // Only one thread may call this function at a time (for this + // timeline). If two threads tried to flush the same frozen + // layer to disk at the same time, that would not work. + assert!(Arc::ptr_eq(&l.unwrap(), &frozen_layer)); + + // Add the new delta layer to the LayerMap + layers.insert_historic(Arc::new(new_delta)); + + // release lock on 'layers' } - // Call unload() on all frozen layers, to release memory. - // This shouldn't be much memory, as only metadata is slurped - // into memory. - for layer in layers.iter_historic_layers() { - layer.unload()?; - } - - drop(layers); - drop(write_guard); - - // Create delta/image layers for evicted layers - for (_evicted_layer_id, evicted_layer) in evicted_layers.iter() { - let mut this_layer_paths = - self.evict_layer(evicted_layer.clone(), reconstruct_pages)?; - layer_paths.append(&mut this_layer_paths); - } - - // Sync layers - if !layer_paths.is_empty() { - // We must fsync the timeline dir to ensure the directory entries for - // new layer files are durable - layer_paths.push(self.conf.timeline_path(&self.timelineid, &self.tenantid)); - - // Fsync all the layer files and directory using multiple threads to - // minimize latency. - par_fsync::par_fsync(&layer_paths)?; - - layer_paths.pop().unwrap(); - } + // Update the metadata file, with new 'disk_consistent_lsn' + // + // TODO: This perhaps should be done in 'flush_frozen_layers', after flushing + // *all* the layers, to avoid fsyncing the file multiple times. + let disk_consistent_lsn; + disk_consistent_lsn = Lsn(frozen_layer.get_lsn_range().end.0 - 1); // If we were able to advance 'disk_consistent_lsn', save it the metadata file. // After crash, we will restart WAL streaming and processing from that point. @@ -1595,6 +1478,10 @@ impl LayeredTimeline { // don't remember what the correct value that corresponds to some old // LSN is. But if we flush everything, then the value corresponding // current 'last_record_lsn' is correct and we can store it on disk. + let RecordLsn { + last: last_record_lsn, + prev: prev_record_lsn, + } = self.last_record_lsn.load(); let ondisk_prev_record_lsn = if disk_consistent_lsn == last_record_lsn { Some(prev_record_lsn) } else { @@ -1615,6 +1502,11 @@ impl LayeredTimeline { self.initdb_lsn, ); + fail_point!("checkpoint-before-saving-metadata", |x| bail!( + "{}", + x.unwrap() + )); + LayeredRepository::save_metadata( self.conf, self.timelineid, @@ -1622,11 +1514,11 @@ impl LayeredTimeline { &metadata, false, )?; - if self.upload_relishes.load(atomic::Ordering::Relaxed) { + if self.upload_layers.load(atomic::Ordering::Relaxed) { schedule_timeline_checkpoint_upload( self.tenantid, self.timelineid, - layer_paths, + vec![new_delta_path], metadata, ); } @@ -1638,34 +1530,273 @@ impl LayeredTimeline { Ok(()) } - fn evict_layer( - &self, - layer: Arc, - reconstruct_pages: bool, - ) -> Result> { - let new_historics = layer.write_to_disk(self, reconstruct_pages)?; + pub fn compact(&self) -> Result<()> { + // + // High level strategy for compaction / image creation: + // + // 1. First, calculate the desired "partitioning" of the + // currently in-use key space. The goal is to partition the + // key space into roughly fixed-size chunks, but also take into + // account any existing image layers, and try to align the + // chunk boundaries with the existing image layers to avoid + // too much churn. Also try to align chunk boundaries with + // relation boundaries. In principle, we don't know about + // relation boundaries here, we just deal with key-value + // pairs, and the code in pgdatadir_mapping.rs knows how to + // map relations into key-value pairs. But in practice we know + // that 'field6' is the block number, and the fields 1-5 + // identify a relation. This is just an optimization, + // though. + // + // 2. Once we know the partitioning, for each partition, + // decide if it's time to create a new image layer. The + // criteria is: there has been too much "churn" since the last + // image layer? The "churn" is fuzzy concept, it's a + // combination of too many delta files, or too much WAL in + // total in the delta file. Or perhaps: if creating an image + // file would allow to delete some older files. + // + // 3. After that, we compact all level0 delta files if there + // are too many of them. While compacting, we also garbage + // collect any page versions that are no longer needed because + // of the new image layers we created in step 2. + // + // TODO: This hight level strategy hasn't been implemented yet. + // Below are functions compact_level0() and create_image_layers() + // but they are a bit ad hoc and don't quite work like it's explained + // above. Rewrite it. + let _compaction_cs = self.compaction_cs.lock().unwrap(); - let mut layer_paths = Vec::new(); - let _write_guard = self.write_lock.lock().unwrap(); - let mut layers = self.layers.lock().unwrap(); + let target_file_size = self.conf.checkpoint_distance; - // Finally, replace the frozen in-memory layer with the new on-disk layers - layers.remove_historic(layer); + // 1. The partitioning was already done by the code in + // pgdatadir_mapping.rs. We just use it here. + let partitioning_guard = self.partitioning.read().unwrap(); + if let Some((partitioning, lsn)) = partitioning_guard.as_ref() { + let timer = self.create_images_time_histo.start_timer(); + // Make a copy of the partitioning, so that we can release + // the lock. Otherwise we could block the WAL receiver. + let lsn = *lsn; + let parts = partitioning.parts.clone(); + drop(partitioning_guard); - // Add the historics to the LayerMap - for delta_layer in new_historics.delta_layers { - layer_paths.push(delta_layer.path()); - layers.insert_historic(Arc::new(delta_layer)); + // 2. Create new image layers for partitions that have been modified + // "enough". + for part in parts.iter() { + if self.time_for_new_image_layer(part, lsn, 3)? { + self.create_image_layer(part, lsn)?; + } + } + timer.stop_and_record(); + + // 3. Compact + let timer = self.compact_time_histo.start_timer(); + self.compact_level0(target_file_size)?; + timer.stop_and_record(); + } else { + info!("Could not compact because no partitioning specified yet"); } - for image_layer in new_historics.image_layers { - layer_paths.push(image_layer.path()); - layers.insert_historic(Arc::new(image_layer)); + + // Call unload() on all frozen layers, to release memory. + // This shouldn't be much memory, as only metadata is slurped + // into memory. + let layers = self.layers.lock().unwrap(); + for layer in layers.iter_historic_layers() { + layer.unload()?; } - Ok(layer_paths) + drop(layers); + + Ok(()) } + // Is it time to create a new image layer for the given partition? + fn time_for_new_image_layer( + &self, + partition: &KeySpace, + lsn: Lsn, + threshold: usize, + ) -> Result { + let layers = self.layers.lock().unwrap(); + + for part_range in &partition.ranges { + let image_coverage = layers.image_coverage(part_range, lsn)?; + for (img_range, last_img) in image_coverage { + let img_lsn = if let Some(ref last_img) = last_img { + last_img.get_lsn_range().end + } else { + Lsn(0) + }; + + let num_deltas = layers.count_deltas(&img_range, &(img_lsn..lsn))?; + + info!( + "range {}-{}, has {} deltas on this timeline", + img_range.start, img_range.end, num_deltas + ); + if num_deltas >= threshold { + return Ok(true); + } + } + } + + Ok(false) + } + + fn create_image_layer(&self, partition: &KeySpace, lsn: Lsn) -> Result<()> { + let img_range = + partition.ranges.first().unwrap().start..partition.ranges.last().unwrap().end; + let mut image_layer_writer = + ImageLayerWriter::new(self.conf, self.timelineid, self.tenantid, &img_range, lsn)?; + + for range in &partition.ranges { + let mut key = range.start; + while key < range.end { + let img = self.get(key, lsn)?; + image_layer_writer.put_image(key, &img)?; + key = key.next(); + } + } + let image_layer = image_layer_writer.finish()?; + + // Sync the new layer to disk before adding it to the layer map, to make sure + // we don't garbage collect something based on the new layer, before it has + // reached the disk. + // + // We must also fsync the timeline dir to ensure the directory entries for + // new layer files are durable + // + // Compaction creates multiple image layers. It would be better to create them all + // and fsync them all in parallel. + par_fsync::par_fsync(&[ + image_layer.path(), + self.conf.timeline_path(&self.timelineid, &self.tenantid), + ])?; + + // FIXME: Do we need to do something to upload it to remote storage here? + + let mut layers = self.layers.lock().unwrap(); + layers.insert_historic(Arc::new(image_layer)); + drop(layers); + + Ok(()) + } + + fn compact_level0(&self, target_file_size: u64) -> Result<()> { + let layers = self.layers.lock().unwrap(); + + // We compact or "shuffle" the level-0 delta layers when 10 have + // accumulated. + static COMPACT_THRESHOLD: usize = 10; + + let level0_deltas = layers.get_level0_deltas()?; + + if level0_deltas.len() < COMPACT_THRESHOLD { + return Ok(()); + } + drop(layers); + + // FIXME: this function probably won't work correctly if there's overlap + // in the deltas. + let lsn_range = level0_deltas + .iter() + .map(|l| l.get_lsn_range()) + .reduce(|a, b| min(a.start, b.start)..max(a.end, b.end)) + .unwrap(); + + let all_values_iter = level0_deltas.iter().map(|l| l.iter()).kmerge_by(|a, b| { + if let Ok((a_key, a_lsn, _)) = a { + if let Ok((b_key, b_lsn, _)) = b { + match a_key.cmp(b_key) { + Ordering::Less => true, + Ordering::Equal => a_lsn <= b_lsn, + Ordering::Greater => false, + } + } else { + false + } + } else { + true + } + }); + + // Merge the contents of all the input delta layers into a new set + // of delta layers, based on the current partitioning. + // + // TODO: this actually divides the layers into fixed-size chunks, not + // based on the partitioning. + // + // TODO: we should also opportunistically materialize and + // garbage collect what we can. + let mut new_layers = Vec::new(); + let mut prev_key: Option = None; + let mut writer: Option = None; + for x in all_values_iter { + let (key, lsn, value) = x?; + + if let Some(prev_key) = prev_key { + if key != prev_key && writer.is_some() { + let size = writer.as_mut().unwrap().size(); + if size > target_file_size { + new_layers.push(writer.take().unwrap().finish(prev_key.next())?); + writer = None; + } + } + } + + if writer.is_none() { + writer = Some(DeltaLayerWriter::new( + self.conf, + self.timelineid, + self.tenantid, + key, + lsn_range.clone(), + )?); + } + + writer.as_mut().unwrap().put_value(key, lsn, value)?; + prev_key = Some(key); + } + if let Some(writer) = writer { + new_layers.push(writer.finish(prev_key.unwrap().next())?); + } + + // Sync layers + if !new_layers.is_empty() { + let mut layer_paths: Vec = new_layers.iter().map(|l| l.path()).collect(); + + // also sync the directory + layer_paths.push(self.conf.timeline_path(&self.timelineid, &self.tenantid)); + + // Fsync all the layer files and directory using multiple threads to + // minimize latency. + par_fsync::par_fsync(&layer_paths)?; + + layer_paths.pop().unwrap(); + } + + let mut layers = self.layers.lock().unwrap(); + for l in new_layers { + layers.insert_historic(Arc::new(l)); + } + + // Now that we have reshuffled the data to set of new delta layers, we can + // delete the old ones + for l in level0_deltas { + l.delete()?; + layers.remove_historic(l.clone()); + } + drop(layers); + + Ok(()) + } + + /// Update information about which layer files need to be retained on + /// garbage collection. This is separate from actually performing the GC, + /// and is updated more frequently, so that compaction can remove obsolete + /// page versions more aggressively. /// - /// Garbage collect layer files on a timeline that are no longer needed. + /// TODO: that's wishful thinking, compaction doesn't actually do that + /// currently. /// /// The caller specifies how much history is needed with the two arguments: /// @@ -1682,15 +1813,29 @@ impl LayeredTimeline { /// the latest LSN subtracted by a constant, and doesn't do anything smart /// to figure out what read-only nodes might actually need.) /// + fn update_gc_info(&self, retain_lsns: Vec, cutoff: Lsn) { + let mut gc_info = self.gc_info.write().unwrap(); + gc_info.retain_lsns = retain_lsns; + gc_info.cutoff = cutoff; + } + + /// + /// Garbage collect layer files on a timeline that are no longer needed. + /// /// Currently, we don't make any attempt at removing unneeded page versions /// within a layer file. We can only remove the whole file if it's fully /// obsolete. /// - pub fn gc_timeline(&self, retain_lsns: Vec, cutoff: Lsn) -> Result { + fn gc(&self) -> Result { let now = Instant::now(); let mut result: GcResult = Default::default(); let disk_consistent_lsn = self.get_disk_consistent_lsn(); - let _checkpoint_cs = self.checkpoint_cs.lock().unwrap(); + + let _compaction_cs = self.compaction_cs.lock().unwrap(); + + let gc_info = self.gc_info.read().unwrap(); + let retain_lsns = &gc_info.retain_lsns; + let cutoff = gc_info.cutoff; let _enter = info_span!("garbage collection", timeline = %self.timelineid, tenant = %self.tenantid, cutoff = %cutoff).entered(); @@ -1709,8 +1854,7 @@ impl LayeredTimeline { // Garbage collect the layer if all conditions are satisfied: // 1. it is older than cutoff LSN; // 2. it doesn't need to be retained for 'retain_lsns'; - // 3. newer on-disk layer exists (only for non-dropped segments); - // 4. this layer doesn't serve as a tombstone for some older layer; + // 3. newer on-disk image layers cover the layer's whole key range // let mut layers = self.layers.lock().unwrap(); 'outer: for l in layers.iter_historic_layers() { @@ -1724,28 +1868,16 @@ impl LayeredTimeline { continue; } - let seg = l.get_seg_tag(); - - if seg.rel.is_relation() { - result.ondisk_relfiles_total += 1; - } else { - result.ondisk_nonrelfiles_total += 1; - } + result.layers_total += 1; // 1. Is it newer than cutoff point? - if l.get_end_lsn() > cutoff { + if l.get_lsn_range().end > cutoff { debug!( - "keeping {} {}-{} because it's newer than cutoff {}", - seg, - l.get_start_lsn(), - l.get_end_lsn(), + "keeping {} because it's newer than cutoff {}", + l.filename().display(), cutoff ); - if seg.rel.is_relation() { - result.ondisk_relfiles_needed_by_cutoff += 1; - } else { - result.ondisk_nonrelfiles_needed_by_cutoff += 1; - } + result.layers_needed_by_cutoff += 1; continue 'outer; } @@ -1754,135 +1886,49 @@ impl LayeredTimeline { // might be referenced by child branches forever. // We can track this in child timeline GC and delete parent layers when // they are no longer needed. This might be complicated with long inheritance chains. - for retain_lsn in &retain_lsns { + for retain_lsn in retain_lsns { // start_lsn is inclusive - if &l.get_start_lsn() <= retain_lsn { + if &l.get_lsn_range().start <= retain_lsn { debug!( - "keeping {} {}-{} because it's still might be referenced by child branch forked at {} is_dropped: {} is_incremental: {}", - seg, - l.get_start_lsn(), - l.get_end_lsn(), + "keeping {} because it's still might be referenced by child branch forked at {} is_dropped: xx is_incremental: {}", + l.filename().display(), retain_lsn, - l.is_dropped(), l.is_incremental(), ); - if seg.rel.is_relation() { - result.ondisk_relfiles_needed_by_branches += 1; - } else { - result.ondisk_nonrelfiles_needed_by_branches += 1; - } + result.layers_needed_by_branches += 1; continue 'outer; } } // 3. Is there a later on-disk layer for this relation? - if !l.is_dropped() - && !layers.newer_image_layer_exists( - l.get_seg_tag(), - l.get_end_lsn(), - disk_consistent_lsn, - ) - { + // + // The end-LSN is exclusive, while disk_consistent_lsn is + // inclusive. For example, if disk_consistent_lsn is 100, it is + // OK for a delta layer to have end LSN 101, but if the end LSN + // is 102, then it might not have been fully flushed to disk + // before crash. + // + // FIXME: This logic is wrong. See https://github.com/zenithdb/zenith/issues/707 + if !layers.newer_image_layer_exists( + &l.get_key_range(), + l.get_lsn_range().end, + disk_consistent_lsn + 1, + )? { debug!( - "keeping {} {}-{} because it is the latest layer", - seg, - l.get_start_lsn(), - l.get_end_lsn() + "keeping {} because it is the latest layer", + l.filename().display() ); - if seg.rel.is_relation() { - result.ondisk_relfiles_not_updated += 1; - } else { - result.ondisk_nonrelfiles_not_updated += 1; - } + result.layers_not_updated += 1; continue 'outer; } - // 4. Does this layer serve as a tombstone for some older layer? - if l.is_dropped() { - let prior_lsn = l.get_start_lsn().checked_sub(1u64).unwrap(); - - // Check if this layer serves as a tombstone for this timeline - // We have to do this separately from timeline check below, - // because LayerMap of this timeline is already locked. - let mut is_tombstone = layers.layer_exists_at_lsn(l.get_seg_tag(), prior_lsn)?; - if is_tombstone { - debug!( - "earlier layer exists at {} in {}", - prior_lsn, self.timelineid - ); - } - // Now check ancestor timelines, if any are present locally - else if let Some(ancestor) = self - .ancestor_timeline - .as_ref() - .and_then(|timeline_entry| timeline_entry.ensure_loaded().ok()) - { - let prior_lsn = ancestor.get_last_record_lsn(); - if seg.rel.is_blocky() { - debug!( - "check blocky relish size {} at {} in {} for layer {}-{}", - seg, - prior_lsn, - ancestor.timelineid, - l.get_start_lsn(), - l.get_end_lsn() - ); - match ancestor.get_relish_size(seg.rel, prior_lsn).unwrap() { - Some(size) => { - let (last_live_seg, _rel_blknum) = - SegmentTag::from_blknum(seg.rel, size - 1); - debug!( - "blocky rel size is {} last_live_seg.segno {} seg.segno {}", - size, last_live_seg.segno, seg.segno - ); - if last_live_seg.segno >= seg.segno { - is_tombstone = true; - } - } - _ => { - debug!("blocky rel doesn't exist"); - } - } - } else { - debug!( - "check non-blocky relish existence {} at {} in {} for layer {}-{}", - seg, - prior_lsn, - ancestor.timelineid, - l.get_start_lsn(), - l.get_end_lsn() - ); - is_tombstone = ancestor.get_rel_exists(seg.rel, prior_lsn).unwrap_or(false); - } - } - - if is_tombstone { - debug!( - "keeping {} {}-{} because this layer serves as a tombstone for older layer", - seg, - l.get_start_lsn(), - l.get_end_lsn() - ); - - if seg.rel.is_relation() { - result.ondisk_relfiles_needed_as_tombstone += 1; - } else { - result.ondisk_nonrelfiles_needed_as_tombstone += 1; - } - continue 'outer; - } - } - // We didn't find any reason to keep this file, so remove it. debug!( - "garbage collecting {} {}-{} is_dropped: {} is_incremental: {}", - l.get_seg_tag(), - l.get_start_lsn(), - l.get_end_lsn(), - l.is_dropped(), + "garbage collecting {} is_dropped: xx is_incremental: {}", + l.filename().display(), l.is_incremental(), ); - layers_to_remove.push(Arc::clone(&l)); + layers_to_remove.push(Arc::clone(l)); } // Actually delete the layers from disk and remove them from the map. @@ -1892,222 +1938,75 @@ impl LayeredTimeline { doomed_layer.delete()?; layers.remove_historic(doomed_layer.clone()); - match ( - doomed_layer.is_dropped(), - doomed_layer.get_seg_tag().rel.is_relation(), - ) { - (true, true) => result.ondisk_relfiles_dropped += 1, - (true, false) => result.ondisk_nonrelfiles_dropped += 1, - (false, true) => result.ondisk_relfiles_removed += 1, - (false, false) => result.ondisk_nonrelfiles_removed += 1, - } + result.layers_removed += 1; } result.elapsed = now.elapsed(); Ok(result) } - fn lookup_cached_page( + /// + /// Reconstruct a value, using the given base image and WAL records in 'data'. + /// + fn reconstruct_value( &self, - rel: &RelishTag, - rel_blknum: BlockNumber, - lsn: Lsn, - ) -> Option<(Lsn, Bytes)> { - let cache = page_cache::get(); - if let RelishTag::Relation(rel_tag) = &rel { - let (lsn, read_guard) = cache.lookup_materialized_page( - self.tenantid, - self.timelineid, - *rel_tag, - rel_blknum, - lsn, - )?; - let img = Bytes::from(read_guard.to_vec()); - Some((lsn, img)) - } else { - None - } - } - - /// - /// Reconstruct a page version from given Layer - /// - fn materialize_page( - &self, - seg: SegmentTag, - seg_blknum: SegmentBlk, - lsn: Lsn, - layer: &dyn Layer, - ) -> anyhow::Result { - // Check the page cache. We will get back the most recent page with lsn <= `lsn`. - // The cached image can be returned directly if there is no WAL between the cached image - // and requested LSN. The cached image can also be used to reduce the amount of WAL needed - // for redo. - let rel = seg.rel; - let rel_blknum = seg.segno * RELISH_SEG_SIZE + seg_blknum; - let cached_page_img = match self.lookup_cached_page(&rel, rel_blknum, lsn) { - Some((cached_lsn, cached_img)) => { - match cached_lsn.cmp(&lsn) { - cmp::Ordering::Less => {} // there might be WAL between cached_lsn and lsn, we need to check - cmp::Ordering::Equal => return Ok(cached_img), // exact LSN match, return the image - cmp::Ordering::Greater => { - bail!("the returned lsn should never be after the requested lsn") - } - } - Some((cached_lsn, cached_img)) - } - None => None, - }; - - let mut data = PageReconstructData { - records: Vec::new(), - page_img: cached_page_img, - }; - - // Holds an Arc reference to 'layer_ref' when iterating in the loop below. - let mut layer_arc: Arc; - - // Call the layer's get_page_reconstruct_data function to get the base image - // and WAL records needed to materialize the page. If it returns 'Continue', - // call it again on the predecessor layer until we have all the required data. - let mut layer_ref = layer; - let mut curr_lsn = lsn; - loop { - let result = self.reconstruct_time_histo.observe_closure_duration(|| { - layer_ref - .get_page_reconstruct_data(seg_blknum, curr_lsn, &mut data) - .with_context(|| { - format!( - "Failed to get reconstruct data {} {:?} {} {}", - layer_ref.get_seg_tag(), - layer_ref.filename(), - seg_blknum, - curr_lsn, - ) - }) - })?; - match result { - PageReconstructResult::Complete => break, - PageReconstructResult::Continue(cont_lsn) => { - // Fetch base image / more WAL from the returned predecessor layer - if let Some((cont_layer, cont_lsn)) = self.get_layer_for_read(seg, cont_lsn)? { - if cont_lsn == curr_lsn { - // We landed on the same layer again. Shouldn't happen, but if it does, - // don't get stuck in an infinite loop. - bail!( - "could not find predecessor of layer {} at {}, layer returned its own LSN", - layer_ref.filename().display(), - cont_lsn - ); - } - layer_arc = cont_layer; - layer_ref = &*layer_arc; - curr_lsn = cont_lsn; - continue; - } else { - bail!( - "could not find predecessor of layer {} at {}", - layer_ref.filename().display(), - cont_lsn - ); - } - } - PageReconstructResult::Missing(lsn) => { - // Oops, we could not reconstruct the page. - if data.records.is_empty() { - // no records, and no base image. This can happen if PostgreSQL extends a relation - // but never writes the page. - // - // Would be nice to detect that situation better. - warn!("Page {} blk {} at {} not found", rel, rel_blknum, lsn); - return Ok(ZERO_PAGE.clone()); - } - bail!( - "No base image found for page {} blk {} at {}/{}", - rel, - rel_blknum, - self.timelineid, - lsn, - ); - } - } - } - - self.reconstruct_page(rel, rel_blknum, lsn, data) - } - - /// - /// Reconstruct a page version, using the given base image and WAL records in 'data'. - /// - fn reconstruct_page( - &self, - rel: RelishTag, - rel_blknum: BlockNumber, + key: Key, request_lsn: Lsn, - mut data: PageReconstructData, + mut data: ValueReconstructState, ) -> Result { // Perform WAL redo if needed data.records.reverse(); // If we have a page image, and no WAL, we're all set if data.records.is_empty() { - if let Some((img_lsn, img)) = &data.page_img { + if let Some((img_lsn, img)) = &data.img { trace!( - "found page image for blk {} in {} at {}, no WAL redo required", - rel_blknum, - rel, + "found page image for key {} at {}, no WAL redo required", + key, img_lsn ); Ok(img.clone()) } else { - // FIXME: this ought to be an error? - warn!( - "Page {} blk {} at {} not found", - rel, rel_blknum, request_lsn - ); - Ok(ZERO_PAGE.clone()) + bail!("base image for {} at {} not found", key, request_lsn); } } else { // We need to do WAL redo. // // If we don't have a base image, then the oldest WAL record better initialize // the page - if data.page_img.is_none() && !data.records.first().unwrap().1.will_init() { - // FIXME: this ought to be an error? - warn!( - "Base image for page {}/{} at {} not found, but got {} WAL records", - rel, - rel_blknum, + if data.img.is_none() && !data.records.first().unwrap().1.will_init() { + bail!( + "Base image for {} at {} not found, but got {} WAL records", + key, request_lsn, data.records.len() ); - Ok(ZERO_PAGE.clone()) } else { - let base_img = if let Some((_lsn, img)) = data.page_img { - trace!("found {} WAL records and a base image for blk {} in {} at {}, performing WAL redo", data.records.len(), rel_blknum, rel, request_lsn); + let base_img = if let Some((_lsn, img)) = data.img { + trace!( + "found {} WAL records and a base image for {} at {}, performing WAL redo", + data.records.len(), + key, + request_lsn + ); Some(img) } else { - trace!("found {} WAL records that will init the page for blk {} in {} at {}, performing WAL redo", data.records.len(), rel_blknum, rel, request_lsn); + trace!("found {} WAL records that will init the page for {} at {}, performing WAL redo", data.records.len(), key, request_lsn); None }; let last_rec_lsn = data.records.last().unwrap().0; - let img = self.walredo_mgr.request_redo( - rel, - rel_blknum, - request_lsn, - base_img, - data.records, - )?; + let img = + self.walredo_mgr + .request_redo(key, request_lsn, base_img, data.records)?; - if let RelishTag::Relation(rel_tag) = &rel { + if img.len() == page_cache::PAGE_SZ { let cache = page_cache::get(); cache.memorize_materialized_page( self.tenantid, self.timelineid, - *rel_tag, - rel_blknum, + key, last_rec_lsn, &img, ); @@ -2117,40 +2016,6 @@ impl LayeredTimeline { } } } - - /// - /// This is a helper function to increase current_total_relation_size - /// - fn increase_current_logical_size(&self, diff: u32) { - let val = self - .current_logical_size - .fetch_add(diff as usize, atomic::Ordering::SeqCst); - trace!( - "increase_current_logical_size: {} + {} = {}", - val, - diff, - val + diff as usize, - ); - self.current_logical_size_gauge - .set(val as i64 + diff as i64); - } - - /// - /// This is a helper function to decrease current_total_relation_size - /// - fn decrease_current_logical_size(&self, diff: u32) { - let val = self - .current_logical_size - .fetch_sub(diff as usize, atomic::Ordering::SeqCst); - trace!( - "decrease_current_logical_size: {} - {} = {}", - val, - diff, - val - diff as usize, - ); - self.current_logical_size_gauge - .set(val as i64 - diff as i64); - } } struct LayeredTimelineWriter<'a> { @@ -2166,159 +2031,20 @@ impl Deref for LayeredTimelineWriter<'_> { } } -impl<'a> TimelineWriter for LayeredTimelineWriter<'a> { - fn put_wal_record( - &self, - lsn: Lsn, - rel: RelishTag, - rel_blknum: u32, - rec: ZenithWalRecord, - ) -> Result<()> { - if !rel.is_blocky() && rel_blknum != 0 { - bail!( - "invalid request for block {} for non-blocky relish {}", - rel_blknum, - rel - ); - } - ensure!(lsn.is_aligned(), "unaligned record LSN"); - - let (seg, seg_blknum) = SegmentTag::from_blknum(rel, rel_blknum); - let layer = self.tl.get_layer_for_write(seg, lsn)?; - let delta_size = layer.put_wal_record(lsn, seg_blknum, rec)?; - self.tl - .increase_current_logical_size(delta_size * BLCKSZ as u32); - Ok(()) +impl<'a> TimelineWriter<'_> for LayeredTimelineWriter<'a> { + fn put(&self, key: Key, lsn: Lsn, value: Value) -> Result<()> { + self.tl.put_value(key, lsn, value) } - fn put_page_image( - &self, - rel: RelishTag, - rel_blknum: BlockNumber, - lsn: Lsn, - img: Bytes, - ) -> Result<()> { - if !rel.is_blocky() && rel_blknum != 0 { - bail!( - "invalid request for block {} for non-blocky relish {}", - rel_blknum, - rel - ); - } - ensure!(lsn.is_aligned(), "unaligned record LSN"); - - let (seg, seg_blknum) = SegmentTag::from_blknum(rel, rel_blknum); - - let layer = self.tl.get_layer_for_write(seg, lsn)?; - let delta_size = layer.put_page_image(seg_blknum, lsn, img)?; - - self.tl - .increase_current_logical_size(delta_size * BLCKSZ as u32); - Ok(()) - } - - fn put_truncation(&self, rel: RelishTag, lsn: Lsn, relsize: BlockNumber) -> Result<()> { - if !rel.is_blocky() { - bail!("invalid truncation for non-blocky relish {}", rel); - } - ensure!(lsn.is_aligned(), "unaligned record LSN"); - - debug!("put_truncation: {} to {} blocks at {}", rel, relsize, lsn); - - let oldsize = self - .tl - .get_relish_size(rel, self.tl.get_last_record_lsn())? - .with_context(|| { - format!( - "attempted to truncate non-existent relish {} at {}", - rel, lsn - ) - })?; - - if oldsize <= relsize { - return Ok(()); - } - let old_last_seg = (oldsize - 1) / RELISH_SEG_SIZE; - - let last_remain_seg = if relsize == 0 { - 0 - } else { - (relsize - 1) / RELISH_SEG_SIZE - }; - - // Drop segments beyond the last remaining segment. - for remove_segno in (last_remain_seg + 1)..=old_last_seg { - let seg = SegmentTag { - rel, - segno: remove_segno, - }; - - let layer = self.tl.get_layer_for_write(seg, lsn)?; - layer.drop_segment(lsn); - } - - // Truncate the last remaining segment to the specified size - if relsize == 0 || relsize % RELISH_SEG_SIZE != 0 { - let seg = SegmentTag { - rel, - segno: last_remain_seg, - }; - let layer = self.tl.get_layer_for_write(seg, lsn)?; - layer.put_truncation(lsn, relsize % RELISH_SEG_SIZE) - } - self.tl - .decrease_current_logical_size((oldsize - relsize) * BLCKSZ as u32); - Ok(()) - } - - fn drop_relish(&self, rel: RelishTag, lsn: Lsn) -> Result<()> { - trace!("drop_segment: {} at {}", rel, lsn); - - if rel.is_blocky() { - if let Some(oldsize) = self - .tl - .get_relish_size(rel, self.tl.get_last_record_lsn())? - { - let old_last_seg = if oldsize == 0 { - 0 - } else { - (oldsize - 1) / RELISH_SEG_SIZE - }; - - // Drop all segments of the relish - for remove_segno in 0..=old_last_seg { - let seg = SegmentTag { - rel, - segno: remove_segno, - }; - let layer = self.tl.get_layer_for_write(seg, lsn)?; - layer.drop_segment(lsn); - } - self.tl - .decrease_current_logical_size(oldsize * BLCKSZ as u32); - } else { - warn!( - "drop_segment called on non-existent relish {} at {}", - rel, lsn - ); - } - } else { - // TODO handle TwoPhase relishes - let (seg, _seg_blknum) = SegmentTag::from_blknum(rel, 0); - let layer = self.tl.get_layer_for_write(seg, lsn)?; - layer.drop_segment(lsn); - } - - Ok(()) + fn delete(&self, key_range: Range, lsn: Lsn) -> Result<()> { + self.tl.put_tombstone(key_range, lsn) } /// /// Remember the (end of) last valid WAL record remembered in the timeline. /// - fn advance_last_record_lsn(&self, new_lsn: Lsn) { - assert!(new_lsn.is_aligned()); - - self.tl.last_record_lsn.advance(new_lsn); + fn finish_write(&self, new_lsn: Lsn) { + self.tl.finish_write(new_lsn); } } @@ -2328,10 +2054,10 @@ pub fn dump_layerfile_from_path(path: &Path) -> Result<()> { let book = Book::new(file)?; match book.magic() { - delta_layer::DELTA_FILE_MAGIC => { + crate::DELTA_FILE_MAGIC => { DeltaLayer::new_for_path(path, &book)?.dump()?; } - image_layer::IMAGE_FILE_MAGIC => { + crate::IMAGE_FILE_MAGIC => { ImageLayer::new_for_path(path, &book)?.dump()?; } magic => bail!("unrecognized magic identifier: {:?}", magic), @@ -2368,9 +2094,11 @@ fn rename_to_backup(path: PathBuf) -> anyhow::Result<()> { /// file format and directory layout. The test here are more low level. /// #[cfg(test)] -mod tests { +pub mod tests { use super::*; + use crate::keyspace::KeySpaceAccum; use crate::repository::repo_harness::*; + use rand::{thread_rng, Rng}; #[test] fn corrupt_metadata() -> Result<()> { @@ -2387,7 +2115,7 @@ mod tests { let mut metadata_bytes = std::fs::read(&metadata_path)?; assert_eq!(metadata_bytes.len(), 512); - metadata_bytes[512 - 4 - 2] ^= 1; + metadata_bytes[8] ^= 1; std::fs::write(metadata_path, metadata_bytes)?; let err = harness.try_load().err().expect("should fail"); @@ -2400,113 +2128,259 @@ mod tests { Ok(()) } - /// - /// Test the logic in 'load_layer_map' that removes layer files that are - /// newer than 'disk_consistent_lsn'. - /// + // Target file size in the unit tests. In production, the target + // file size is much larger, maybe 1 GB. But a small size makes it + // much faster to exercise all the logic for creating the files, + // garbage collection, compaction etc. + pub const TEST_FILE_SIZE: u64 = 4 * 1024 * 1024; + #[test] - fn future_layerfiles() -> Result<()> { - const TEST_NAME: &str = "future_layerfiles"; - let harness = RepoHarness::create(TEST_NAME)?; - let repo = harness.load(); + fn test_images() -> Result<()> { + let repo = RepoHarness::create("test_images")?.load(); + let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; + + #[allow(non_snake_case)] + let TEST_KEY: Key = Key::from_hex("112222222233333333444444445500000001").unwrap(); - // Create a timeline with disk_consistent_lsn = 8000 - let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0x8000))?; let writer = tline.writer(); - writer.advance_last_record_lsn(Lsn(0x8000)); + writer.put(TEST_KEY, Lsn(0x10), Value::Image(TEST_IMG("foo at 0x10")))?; + writer.finish_write(Lsn(0x10)); drop(writer); - repo.checkpoint_iteration(CheckpointConfig::Forced)?; - drop(repo); - let timeline_path = harness.timeline_path(&TIMELINE_ID); + tline.checkpoint(CheckpointConfig::Forced)?; + tline.compact()?; - let make_empty_file = |filename: &str| -> std::io::Result<()> { - let path = timeline_path.join(filename); + let writer = tline.writer(); + writer.put(TEST_KEY, Lsn(0x20), Value::Image(TEST_IMG("foo at 0x20")))?; + writer.finish_write(Lsn(0x20)); + drop(writer); - assert!(!path.exists()); - std::fs::write(&path, &[])?; + tline.checkpoint(CheckpointConfig::Forced)?; + tline.compact()?; - Ok(()) - }; + let writer = tline.writer(); + writer.put(TEST_KEY, Lsn(0x30), Value::Image(TEST_IMG("foo at 0x30")))?; + writer.finish_write(Lsn(0x30)); + drop(writer); - // Helper function to check that a relation file exists, and a corresponding - // .0.old file does not. - let assert_exists = |filename: &str| { - let path = timeline_path.join(filename); - assert!(path.exists(), "file {} was removed", filename); + tline.checkpoint(CheckpointConfig::Forced)?; + tline.compact()?; - // Check that there is no .old file - let backup_path = timeline_path.join(format!("{}.0.old", filename)); - assert!( - !backup_path.exists(), - "unexpected backup file {}", - backup_path.display() - ); - }; + let writer = tline.writer(); + writer.put(TEST_KEY, Lsn(0x40), Value::Image(TEST_IMG("foo at 0x40")))?; + writer.finish_write(Lsn(0x40)); + drop(writer); - // Helper function to check that a relation file does *not* exists, and a corresponding - // ..old file does. - let assert_is_renamed = |filename: &str, num: u32| { - let path = timeline_path.join(filename); - assert!( - !path.exists(), - "file {} was not removed as expected", - filename - ); + tline.checkpoint(CheckpointConfig::Forced)?; + tline.compact()?; - let backup_path = timeline_path.join(format!("{}.{}.old", filename, num)); - assert!( - backup_path.exists(), - "backup file {} was not created", - backup_path.display() - ); - }; + assert_eq!(tline.get(TEST_KEY, Lsn(0x10))?, TEST_IMG("foo at 0x10")); + assert_eq!(tline.get(TEST_KEY, Lsn(0x1f))?, TEST_IMG("foo at 0x10")); + assert_eq!(tline.get(TEST_KEY, Lsn(0x20))?, TEST_IMG("foo at 0x20")); + assert_eq!(tline.get(TEST_KEY, Lsn(0x30))?, TEST_IMG("foo at 0x30")); + assert_eq!(tline.get(TEST_KEY, Lsn(0x40))?, TEST_IMG("foo at 0x40")); - // These files are considered to be in the future and will be renamed out - // of the way - let future_filenames = vec![ - format!("pg_control_0_{:016X}", 0x8001), - format!("pg_control_0_{:016X}_{:016X}", 0x8001, 0x8008), - ]; - // But these are not: - let past_filenames = vec![ - format!("pg_control_0_{:016X}", 0x8000), - format!("pg_control_0_{:016X}_{:016X}", 0x7000, 0x8001), - ]; + Ok(()) + } - for filename in future_filenames.iter().chain(past_filenames.iter()) { - make_empty_file(filename)?; + // + // Insert 1000 key-value pairs with increasing keys, checkpoint, + // repeat 50 times. + // + #[test] + fn test_bulk_insert() -> Result<()> { + let repo = RepoHarness::create("test_bulk_insert")?.load(); + let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; + + let mut lsn = Lsn(0x10); + + let mut keyspace = KeySpaceAccum::new(); + + let mut test_key = Key::from_hex("012222222233333333444444445500000000").unwrap(); + let mut blknum = 0; + for _ in 0..50 { + for _ in 0..1000 { + test_key.field6 = blknum; + let writer = tline.writer(); + writer.put( + test_key, + lsn, + Value::Image(TEST_IMG(&format!("{} at {}", blknum, lsn))), + )?; + writer.finish_write(lsn); + drop(writer); + + keyspace.add_key(test_key); + + lsn = Lsn(lsn.0 + 0x10); + blknum += 1; + } + + let cutoff = tline.get_last_record_lsn(); + let parts = keyspace + .clone() + .to_keyspace() + .partition(TEST_FILE_SIZE as u64); + tline.hint_partitioning(parts.clone(), lsn)?; + + tline.update_gc_info(Vec::new(), cutoff); + tline.checkpoint(CheckpointConfig::Forced)?; + tline.compact()?; + tline.gc()?; } - // Load the timeline. This will cause the files in the "future" to be renamed - // away. - let new_repo = harness.load(); - new_repo.get_timeline_load(TIMELINE_ID).unwrap(); - drop(new_repo); + Ok(()) + } - for filename in future_filenames.iter() { - assert_is_renamed(filename, 0); - } - for filename in past_filenames.iter() { - assert_exists(filename); + #[test] + fn test_random_updates() -> Result<()> { + let repo = RepoHarness::create("test_random_updates")?.load(); + let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; + + const NUM_KEYS: usize = 1000; + + let mut test_key = Key::from_hex("012222222233333333444444445500000000").unwrap(); + + let mut keyspace = KeySpaceAccum::new(); + + // Track when each page was last modified. Used to assert that + // a read sees the latest page version. + let mut updated = [Lsn(0); NUM_KEYS]; + + let mut lsn = Lsn(0); + #[allow(clippy::needless_range_loop)] + for blknum in 0..NUM_KEYS { + lsn = Lsn(lsn.0 + 0x10); + test_key.field6 = blknum as u32; + let writer = tline.writer(); + writer.put( + test_key, + lsn, + Value::Image(TEST_IMG(&format!("{} at {}", blknum, lsn))), + )?; + writer.finish_write(lsn); + updated[blknum] = lsn; + drop(writer); + + keyspace.add_key(test_key); } - // Create the future files again, and load again. They should be renamed to - // *.1.old this time. - for filename in future_filenames.iter() { - make_empty_file(filename)?; + let parts = keyspace.to_keyspace().partition(TEST_FILE_SIZE as u64); + tline.hint_partitioning(parts, lsn)?; + + for _ in 0..50 { + for _ in 0..NUM_KEYS { + lsn = Lsn(lsn.0 + 0x10); + let blknum = thread_rng().gen_range(0..NUM_KEYS); + test_key.field6 = blknum as u32; + let writer = tline.writer(); + writer.put( + test_key, + lsn, + Value::Image(TEST_IMG(&format!("{} at {}", blknum, lsn))), + )?; + println!("updating {} at {}", blknum, lsn); + writer.finish_write(lsn); + drop(writer); + updated[blknum] = lsn; + } + + // Read all the blocks + for (blknum, last_lsn) in updated.iter().enumerate() { + test_key.field6 = blknum as u32; + assert_eq!( + tline.get(test_key, lsn)?, + TEST_IMG(&format!("{} at {}", blknum, last_lsn)) + ); + } + + // Perform a cycle of checkpoint, compaction, and GC + println!("checkpointing {}", lsn); + let cutoff = tline.get_last_record_lsn(); + tline.update_gc_info(Vec::new(), cutoff); + tline.checkpoint(CheckpointConfig::Forced)?; + tline.compact()?; + tline.gc()?; } - let new_repo = harness.load(); - new_repo.get_timeline_load(TIMELINE_ID).unwrap(); - drop(new_repo); + Ok(()) + } - for filename in future_filenames.iter() { - assert_is_renamed(filename, 0); - assert_is_renamed(filename, 1); + #[test] + fn test_traverse_branches() -> Result<()> { + let repo = RepoHarness::create("test_traverse_branches")?.load(); + let mut tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; + + const NUM_KEYS: usize = 1000; + + let mut test_key = Key::from_hex("012222222233333333444444445500000000").unwrap(); + + let mut keyspace = KeySpaceAccum::new(); + + // Track when each page was last modified. Used to assert that + // a read sees the latest page version. + let mut updated = [Lsn(0); NUM_KEYS]; + + let mut lsn = Lsn(0); + #[allow(clippy::needless_range_loop)] + for blknum in 0..NUM_KEYS { + lsn = Lsn(lsn.0 + 0x10); + test_key.field6 = blknum as u32; + let writer = tline.writer(); + writer.put( + test_key, + lsn, + Value::Image(TEST_IMG(&format!("{} at {}", blknum, lsn))), + )?; + writer.finish_write(lsn); + updated[blknum] = lsn; + drop(writer); + + keyspace.add_key(test_key); } - for filename in past_filenames.iter() { - assert_exists(filename); + + let parts = keyspace.to_keyspace().partition(TEST_FILE_SIZE as u64); + tline.hint_partitioning(parts, lsn)?; + + let mut tline_id = TIMELINE_ID; + for _ in 0..50 { + let new_tline_id = ZTimelineId::generate(); + repo.branch_timeline(tline_id, new_tline_id, lsn)?; + tline = repo.get_timeline_load(new_tline_id)?; + tline_id = new_tline_id; + + for _ in 0..NUM_KEYS { + lsn = Lsn(lsn.0 + 0x10); + let blknum = thread_rng().gen_range(0..NUM_KEYS); + test_key.field6 = blknum as u32; + let writer = tline.writer(); + writer.put( + test_key, + lsn, + Value::Image(TEST_IMG(&format!("{} at {}", blknum, lsn))), + )?; + println!("updating {} at {}", blknum, lsn); + writer.finish_write(lsn); + drop(writer); + updated[blknum] = lsn; + } + + // Read all the blocks + for (blknum, last_lsn) in updated.iter().enumerate() { + test_key.field6 = blknum as u32; + assert_eq!( + tline.get(test_key, lsn)?, + TEST_IMG(&format!("{} at {}", blknum, last_lsn)) + ); + } + + // Perform a cycle of checkpoint, compaction, and GC + println!("checkpointing {}", lsn); + let cutoff = tline.get_last_record_lsn(); + tline.update_gc_info(Vec::new(), cutoff); + tline.checkpoint(CheckpointConfig::Forced)?; + tline.compact()?; + tline.gc()?; } Ok(()) diff --git a/pageserver/src/layered_repository/README.md b/pageserver/src/layered_repository/README.md index 20f89ddc70..519478e417 100644 --- a/pageserver/src/layered_repository/README.md +++ b/pageserver/src/layered_repository/README.md @@ -1,40 +1,42 @@ # Overview -The on-disk format is based on immutable files. The page server receives a -stream of incoming WAL, parses the WAL records to determine which pages they -apply to, and accumulates the incoming changes in memory. Every now and then, -the accumulated changes are written out to new immutable files. This process is -called checkpointing. Old versions of on-disk files that are not needed by any -timeline are removed by GC process. - The main responsibility of the Page Server is to process the incoming WAL, and reprocess it into a format that allows reasonably quick access to any page -version. +version. The page server slices the incoming WAL per relation and page, and +packages the sliced WAL into suitably-sized "layer files". The layer files +contain all the history of the database, back to some reasonable retention +period. This system replaces the base backups and the WAL archive used in a +traditional PostgreSQL installation. The layer files are immutable, they are not +modified in-place after creation. New layer files are created for new incoming +WAL, and old layer files are removed when they are no longer needed. + +The on-disk format is based on immutable files. The page server receives a +stream of incoming WAL, parses the WAL records to determine which pages they +apply to, and accumulates the incoming changes in memory. Whenever enough WAL +has been accumulated in memory, it is written out to a new immutable file. That +process accumulates "L0 delta files" on disk. When enough L0 files have been +accumulated, they are merged and re-partitioned into L1 files, and old files +that are no longer needed are removed by Garbage Collection (GC). The incoming WAL contains updates to arbitrary pages in the system. The distribution depends on the workload: the updates could be totally random, or there could be a long stream of updates to a single relation when data is bulk -loaded, for example, or something in between. The page server slices the -incoming WAL per relation and page, and packages the sliced WAL into -suitably-sized "layer files". The layer files contain all the history of the -database, back to some reasonable retention period. This system replaces the -base backups and the WAL archive used in a traditional PostgreSQL -installation. The layer files are immutable, they are not modified in-place -after creation. New layer files are created for new incoming WAL, and old layer -files are removed when they are no longer needed. We could also replace layer -files with new files that contain the same information, merging small files for -example, but that hasn't been implemented yet. +loaded, for example, or something in between. +Cloud Storage Page Server Safekeeper + L1 L0 Memory WAL -Cloud Storage Page Server Safekeeper - Local disk Memory WAL - -|AAAA| |AAAA|AAAA| |AA -|BBBB| |BBBB|BBBB| | -|CCCC|CCCC| <---- |CCCC|CCCC|CCCC| <--- |CC <---- ADEBAABED -|DDDD|DDDD| |DDDD|DDDD| |DDD -|EEEE| |EEEE|EEEE|EEEE| |E - ++----+ +----+----+ +|AAAA| |AAAA|AAAA| +---+-----+ | ++----+ +----+----+ | | | |AA +|BBBB| |BBBB|BBBB| |BB | AA | |BB ++----+----+ +----+----+ |C | BB | |CC +|CCCC|CCCC| <---- |CCCC|CCCC| <--- |D | CC | <--- |DDD <---- ADEBAABED ++----+----+ +----+----+ | | DDD | |E +|DDDD|DDDD| |DDDD|DDDD| |E | | | ++----+----+ +----+----+ | | | +|EEEE| |EEEE|EEEE| +---+-----+ ++----+ +----+----+ In this illustration, WAL is received as a stream from the Safekeeper, from the right. It is immediately captured by the page server and stored quickly in @@ -42,39 +44,29 @@ memory. The page server memory can be thought of as a quick "reorder buffer", used to hold the incoming WAL and reorder it so that we keep the WAL records for the same page and relation close to each other. -From the page server memory, whenever enough WAL has been accumulated for one -relation segment, it is moved to local disk, as a new layer file, and the memory -is released. +From the page server memory, whenever enough WAL has been accumulated, it is flushed +to disk into a new L0 layer file, and the memory is released. + +When enough L0 files have been accumulated, they are merged together rand sliced +per key-space, producing a new set of files where each file contains a more +narrow key range, but larger LSN range. From the local disk, the layers are further copied to Cloud Storage, for long-term archival. After a layer has been copied to Cloud Storage, it can be removed from local disk, although we currently keep everything locally for fast access. If a layer is needed that isn't found locally, it is fetched from Cloud -Storage and stored in local disk. - -# Terms used in layered repository - -- Relish - one PostgreSQL relation or similarly treated file. -- Segment - one slice of a Relish that is stored in a LayeredTimeline. -- Layer - specific version of a relish Segment in a range of LSNs. +Storage and stored in local disk. L0 and L1 files are both uploaded to Cloud +Storage. # Layer map -The LayerMap tracks what layers exist for all the relishes in a timeline. - -LayerMap consists of two data structures: -- segs - All the layers keyed by segment tag -- open_layers - data structure that hold all open layers ordered by oldest_pending_lsn for quick access during checkpointing. oldest_pending_lsn is the LSN of the oldest page version stored in this layer. - -All operations that update InMemory Layers should update both structures to keep them up-to-date. - -- LayeredTimeline - implements Timeline interface. - -All methods of LayeredTimeline are aware of its ancestors and return data taking them into account. -TODO: Are there any exceptions to this? -For example, timeline.list_rels(lsn) will return all segments that are visible in this timeline at the LSN, -including ones that were not modified in this timeline and thus don't have a layer in the timeline's LayerMap. +The LayerMap tracks what layers exist in a timeline. +Currently, the layer map is just a resizeable array (Vec). On a GetPage@LSN or +other read request, the layer map scans through the array to find the right layer +that contains the data for the requested page. The read-code in LayeredTimeline +is aware of the ancestor, and returns data from the ancestor timeline if it's +not found on the current timeline. # Different kinds of layers @@ -92,11 +84,11 @@ To avoid OOM errors, InMemory layers can be spilled to disk into ephemeral file. TODO: Clarify the difference between Closed, Historic and Frozen. There are two kinds of OnDisk layers: -- ImageLayer represents an image or a snapshot of a 10 MB relish segment, at one particular LSN. -- DeltaLayer represents a collection of WAL records or page images in a range of LSNs, for one - relish segment. - -Dropped segments are always represented on disk by DeltaLayer. +- ImageLayer represents a snapshot of all the keys in a particular range, at one + particular LSN. Any keys that are not present in the ImageLayer are known not + to exist at that LSN. +- DeltaLayer represents a collection of WAL records or page images in a range of + LSNs, for a range of keys. # Layer life cycle @@ -109,71 +101,71 @@ layer or a delta layer, it is a valid end bound. An image layer represents snapshot at one LSN, so end_lsn is always the snapshot LSN + 1 Every layer starts its life as an Open In-Memory layer. When the page server -receives the first WAL record for a segment, it creates a new In-Memory layer -for it, and puts it to the layer map. Later, the layer is old enough, its -contents are written to disk, as On-Disk layers. This process is called -"evicting" a layer. +receives the first WAL record for a timeline, it creates a new In-Memory layer +for it, and puts it to the layer map. Later, when the layer becomes full, its +contents are written to disk, as an on-disk layers. -Layer eviction is a two-step process: First, the layer is marked as closed, so -that it no longer accepts new WAL records, and the layer map is updated -accordingly. If a new WAL record for that segment arrives after this step, a new -Open layer is created to hold it. After this first step, the layer is a Closed +Flushing a layer is a two-step process: First, the layer is marked as closed, so +that it no longer accepts new WAL records, and a new in-memory layer is created +to hold any WAL after that point. After this first step, the layer is a Closed InMemory state. This first step is called "freezing" the layer. -In the second step, new Delta and Image layers are created, containing all the -data in the Frozen InMemory layer. When the new layers are ready, the original -frozen layer is replaced with the new layers in the layer map, and the original -frozen layer is dropped, releasing the memory. +In the second step, a new Delta layers is created, containing all the data from +the Frozen InMemory layer. When it has been created and flushed to disk, the +original frozen layer is replaced with the new layers in the layer map, and the +original frozen layer is dropped, releasing the memory. # Layer files (On-disk layers) -The files are called "layer files". Each layer file corresponds -to one RELISH_SEG_SIZE slice of a PostgreSQL relation fork or -non-rel file in a range of LSNs. The layer files -for each timeline are stored in the timeline's subdirectory under +The files are called "layer files". Each layer file covers a range of keys, and +a range of LSNs (or a single LSN, in case of image layers). You can think of it +as a rectangle in the two-dimensional key-LSN space. The layer files for each +timeline are stored in the timeline's subdirectory under .zenith/tenants//timelines. -There are two kind of layer file: base images, and deltas. A base -image file contains a layer of a segment as it was at one LSN, -whereas a delta file contains modifications to a segment - mostly in -the form of WAL records - in a range of LSN +There are two kind of layer files: images, and delta layers. An image file +contains a snapshot of all keys at a particular LSN, whereas a delta file +contains modifications to a segment - mostly in the form of WAL records - in a +range of LSN. -base image file: +image file: - rel______ + 000000067F000032BE0000400000000070B6-000000067F000032BE0000400000000080B6__00000000346BC568 + start key end key LSN + +The first parts define the key range that the layer covers. See +pgdatadir_mapping.rs for how the key space is used. The last part is the LSN. delta file: - rel_______ +Delta files are named similarly, but they cover a range of LSNs: -For example: + 000000067F000032BE0000400000000020B6-000000067F000032BE0000400000000030B6__000000578C6B29-0000000057A50051 + start key end key start LSN end LSN - rel_1663_13990_2609_0_10_000000000169C348 - rel_1663_13990_2609_0_10_000000000169C348_0000000001702000 +A delta file contains all the key-values in the key-range that were updated in +the LSN range. If a key has not been modified, there is no trace of it in the +delta layer. -In addition to the relations, with "rel_*" prefix, we use the same -format for storing various smaller files from the PostgreSQL data -directory. They will use different suffixes and the naming scheme up -to the LSNs vary. The Zenith source code uses the term "relish" to -mean "a relation, or other file that's treated like a relation in the -storage" For example, a base image of a CLOG segment would be named -like this: - pg_xact_0000_0_00000000198B06B0 +A delta layer file can cover a part of the overall key space, as in the previous +example, or the whole key range like this: -There is no difference in how the relation and non-relation files are -managed, except that the first part of file names is different. -Internally, the relations and non-relation files that are managed in -the versioned store are together called "relishes". + 000000000000000000000000000000000000-FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF__000000578C6B29-0000000057A50051 -If a file has been dropped, the last layer file for it is created -with the _DROPPED suffix, e.g. - - rel_1663_13990_2609_0_10_000000000169C348_0000000001702000_DROPPED +A file that covers the whole key range is called a L0 file (Level 0), while a +file that covers only part of the key range is called a L1 file. The "level" of +a file is not explicitly stored anywhere, you can only distinguish them by +looking at the key range that a file covers. The read-path doesn't need to +treat L0 and L1 files any differently. ## Notation used in this document +FIXME: This is somewhat obsolete, the layer files cover a key-range rather than +a particular relation nowadays. However, the description on how you find a page +version, and how branching and GC works is still valid. + The full path of a delta file looks like this: .zenith/tenants/941ddc8604413b88b3d208bddf90396c/timelines/4af489b06af8eed9e27a841775616962/rel_1663_13990_2609_0_10_000000000169C348_0000000001702000 diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs index 1a6e941fbe..bb5fa02be1 100644 --- a/pageserver/src/layered_repository/delta_layer.rs +++ b/pageserver/src/layered_repository/delta_layer.rs @@ -1,6 +1,5 @@ -//! //! A DeltaLayer represents a collection of WAL records or page images in a range of -//! LSNs, for one segment. It is stored on a file on disk. +//! LSNs, and in a range of Keys. It is stored on a file on disk. //! //! Usually a delta layer only contains differences - in the form of WAL records against //! a base LSN. However, if a segment is newly created, by creating a new relation or @@ -11,84 +10,74 @@ //! can happen when you create a new branch in the middle of a delta layer, and the WAL //! records on the new branch are put in a new delta layer. //! -//! When a delta file needs to be accessed, we slurp the metadata and segsize chapters +//! When a delta file needs to be accessed, we slurp the 'index' metadata //! into memory, into the DeltaLayerInner struct. See load() and unload() functions. -//! To access a page/WAL record, we search `page_version_metas` for the block # and LSN. -//! The byte ranges in the metadata can be used to find the page/WAL record in -//! PAGE_VERSIONS_CHAPTER. +//! To access a particular value, we search `index` for the given key. +//! The byte offset in the index can be used to find the value in +//! VALUES_CHAPTER. //! //! On disk, the delta files are stored in timelines/ directory. //! Currently, there are no subdirectories, and each delta file is named like this: //! -//! ______ +//! -__- page/WAL record +/// byte ranges in VALUES_CHAPTER +static INDEX_CHAPTER: u64 = 1; -/// Mapping from (block #, lsn) -> page/WAL record -/// byte ranges in PAGE_VERSIONS_CHAPTER -static PAGE_VERSION_METAS_CHAPTER: u64 = 1; /// Page/WAL bytes - cannot be interpreted -/// without PAGE_VERSION_METAS_CHAPTER -static PAGE_VERSIONS_CHAPTER: u64 = 2; -static SEG_SIZES_CHAPTER: u64 = 3; +/// without the page versions from the INDEX_CHAPTER +static VALUES_CHAPTER: u64 = 2; /// Contains the [`Summary`] struct -static SUMMARY_CHAPTER: u64 = 4; +static SUMMARY_CHAPTER: u64 = 3; #[derive(Debug, Serialize, Deserialize, PartialEq, Eq)] struct Summary { tenantid: ZTenantId, timelineid: ZTimelineId, - seg: SegmentTag, - - start_lsn: Lsn, - end_lsn: Lsn, - - dropped: bool, + key_range: Range, + lsn_range: Range, } impl From<&DeltaLayer> for Summary { @@ -96,33 +85,17 @@ impl From<&DeltaLayer> for Summary { Self { tenantid: layer.tenantid, timelineid: layer.timelineid, - seg: layer.seg, - - start_lsn: layer.start_lsn, - end_lsn: layer.end_lsn, - - dropped: layer.dropped, + key_range: layer.key_range.clone(), + lsn_range: layer.lsn_range.clone(), } } } -#[derive(Serialize, Deserialize)] -struct BlobRange { - offset: u64, - size: usize, -} - -fn read_blob(reader: &BoundedReader<&'_ F>, range: &BlobRange) -> Result> { - let mut buf = vec![0u8; range.size]; - reader.read_exact_at(&mut buf, range.offset)?; - Ok(buf) -} - /// /// DeltaLayer is the in-memory data structure associated with an /// on-disk delta file. We keep a DeltaLayer in memory for each /// file, in the LayerMap. If a layer is in "loaded" state, we have a -/// copy of the file in memory, in 'inner'. Otherwise the struct is +/// copy of the index in memory, in 'inner'. Otherwise the struct is /// just a placeholder for a file that exists on disk, and it needs to /// be loaded before using it in queries. /// @@ -131,47 +104,24 @@ pub struct DeltaLayer { pub tenantid: ZTenantId, pub timelineid: ZTimelineId, - pub seg: SegmentTag, - - // - // This entry contains all the changes from 'start_lsn' to 'end_lsn'. The - // start is inclusive, and end is exclusive. - // - pub start_lsn: Lsn, - pub end_lsn: Lsn, - - dropped: bool, + pub key_range: Range, + pub lsn_range: Range, inner: RwLock, } pub struct DeltaLayerInner { - /// If false, the 'page_version_metas' and 'seg_sizes' have not been - /// loaded into memory yet. + /// If false, the 'index' has not been loaded into memory yet. loaded: bool, + /// + /// All versions of all pages in the layer are kept here. + /// Indexed by block number and LSN. The value is an offset into the + /// chapter where the page version is stored. + /// + index: HashMap>, + book: Option>, - - /// All versions of all pages in the file are are kept here. - /// Indexed by block number and LSN. - page_version_metas: VecMap<(SegmentBlk, Lsn), BlobRange>, - - /// `seg_sizes` tracks the size of the segment at different points in time. - seg_sizes: VecMap, -} - -impl DeltaLayerInner { - fn get_seg_size(&self, lsn: Lsn) -> Result { - // Scan the VecMap backwards, starting from the given entry. - let slice = self - .seg_sizes - .slice_range((Included(&Lsn(0)), Included(&lsn))); - if let Some((_entry_lsn, entry)) = slice.last() { - Ok(*entry) - } else { - bail!("could not find seg size in delta layer") - } - } } impl Layer for DeltaLayer { @@ -183,132 +133,93 @@ impl Layer for DeltaLayer { self.timelineid } - fn get_seg_tag(&self) -> SegmentTag { - self.seg + fn get_key_range(&self) -> Range { + self.key_range.clone() } - fn is_dropped(&self) -> bool { - self.dropped - } - - fn get_start_lsn(&self) -> Lsn { - self.start_lsn - } - - fn get_end_lsn(&self) -> Lsn { - self.end_lsn + fn get_lsn_range(&self) -> Range { + self.lsn_range.clone() } fn filename(&self) -> PathBuf { PathBuf::from(self.layer_name().to_string()) } - /// Look up given page in the cache. - fn get_page_reconstruct_data( + fn get_value_reconstruct_data( &self, - blknum: SegmentBlk, - lsn: Lsn, - reconstruct_data: &mut PageReconstructData, - ) -> anyhow::Result { + key: Key, + lsn_range: Range, + reconstruct_state: &mut ValueReconstructState, + ) -> anyhow::Result { let mut need_image = true; - ensure!((0..RELISH_SEG_SIZE).contains(&blknum)); - - match &reconstruct_data.page_img { - Some((cached_lsn, _)) if &self.end_lsn <= cached_lsn => { - return Ok(PageReconstructResult::Complete) - } - _ => {} - } + ensure!(self.key_range.contains(&key)); { // Open the file and lock the metadata in memory let inner = self.load()?; - let page_version_reader = inner + let values_reader = inner .book .as_ref() .expect("should be loaded in load call above") - .chapter_reader(PAGE_VERSIONS_CHAPTER)?; + .chapter_reader(VALUES_CHAPTER)?; - // Scan the metadata VecMap backwards, starting from the given entry. - let minkey = (blknum, Lsn(0)); - let maxkey = (blknum, lsn); - let iter = inner - .page_version_metas - .slice_range((Included(&minkey), Included(&maxkey))) - .iter() - .rev(); - for ((_blknum, pv_lsn), blob_range) in iter { - match &reconstruct_data.page_img { - Some((cached_lsn, _)) if pv_lsn <= cached_lsn => { - return Ok(PageReconstructResult::Complete) - } - _ => {} - } - - let pv = PageVersion::des(&read_blob(&page_version_reader, blob_range)?)?; - - match pv { - PageVersion::Page(img) => { - // Found a page image, return it - reconstruct_data.page_img = Some((*pv_lsn, img)); - need_image = false; + // Scan the page versions backwards, starting from `lsn`. + if let Some(vec_map) = inner.index.get(&key) { + let slice = vec_map.slice_range(lsn_range); + let mut size = 0usize; + let mut first_pos = 0u64; + for (_entry_lsn, blob_ref) in slice.iter().rev() { + size += blob_ref.size(); + first_pos = blob_ref.pos(); + if blob_ref.will_init() { break; } - PageVersion::Wal(rec) => { - let will_init = rec.will_init(); - reconstruct_data.records.push((*pv_lsn, rec)); - if will_init { - // This WAL record initializes the page, so no need to go further back - need_image = false; - break; + } + if size != 0 { + let mut buf = vec![0u8; size]; + values_reader.read_exact_at(&mut buf, first_pos)?; + for (entry_lsn, blob_ref) in slice.iter().rev() { + let offs = (blob_ref.pos() - first_pos) as usize; + let val = Value::des(&buf[offs..offs + blob_ref.size()])?; + match val { + Value::Image(img) => { + reconstruct_state.img = Some((*entry_lsn, img)); + need_image = false; + break; + } + Value::WalRecord(rec) => { + let will_init = rec.will_init(); + reconstruct_state.records.push((*entry_lsn, rec)); + if will_init { + // This WAL record initializes the page, so no need to go further back + need_image = false; + break; + } + } } } } } - - // If we didn't find any records for this, check if the request is beyond EOF - if need_image - && reconstruct_data.records.is_empty() - && self.seg.rel.is_blocky() - && blknum >= inner.get_seg_size(lsn)? - { - return Ok(PageReconstructResult::Missing(self.start_lsn)); - } - // release metadata lock and close the file } // If an older page image is needed to reconstruct the page, let the // caller know. if need_image { - Ok(PageReconstructResult::Continue(Lsn(self.start_lsn.0 - 1))) + Ok(ValueReconstructResult::Continue) } else { - Ok(PageReconstructResult::Complete) + Ok(ValueReconstructResult::Complete) } } - /// Get size of the relation at given LSN - fn get_seg_size(&self, lsn: Lsn) -> anyhow::Result { - ensure!(lsn >= self.start_lsn); - ensure!( - self.seg.rel.is_blocky(), - "get_seg_size() called on a non-blocky rel" - ); + fn iter(&self) -> Box> + '_> { + let inner = self.load().unwrap(); - let inner = self.load()?; - inner.get_seg_size(lsn) - } - - /// Does this segment exist at given LSN? - fn get_seg_exists(&self, lsn: Lsn) -> Result { - // Is the requested LSN after the rel was dropped? - if self.dropped && lsn >= self.end_lsn { - return Ok(false); + match DeltaValueIter::new(inner) { + Ok(iter) => Box::new(iter), + Err(err) => Box::new(std::iter::once(Err(err))), } - - // Otherwise, it exists. - Ok(true) } /// @@ -316,13 +227,22 @@ impl Layer for DeltaLayer { /// it will need to be loaded back. /// fn unload(&self) -> Result<()> { + // FIXME: In debug mode, loading and unloading the index slows + // things down so much that you get timeout errors. At least + // with the test_parallel_copy test. So as an even more ad hoc + // stopgap fix for that, only unload every on average 10 + // checkpoint cycles. + use rand::RngCore; + if rand::thread_rng().next_u32() > (u32::MAX / 10) { + return Ok(()); + } + let mut inner = match self.inner.try_write() { Ok(inner) => inner, Err(TryLockError::WouldBlock) => return Ok(()), Err(TryLockError::Poisoned(_)) => panic!("DeltaLayer lock was poisoned"), }; - inner.page_version_metas = VecMap::default(); - inner.seg_sizes = VecMap::default(); + inner.index = HashMap::default(); inner.loaded = false; // Note: we keep the Book open. Is that a good idea? The virtual file @@ -349,45 +269,52 @@ impl Layer for DeltaLayer { /// debugging function to print out the contents of the layer fn dump(&self) -> Result<()> { println!( - "----- delta layer for ten {} tli {} seg {} {}-{} ----", - self.tenantid, self.timelineid, self.seg, self.start_lsn, self.end_lsn + "----- delta layer for ten {} tli {} keys {}-{} lsn {}-{} ----", + self.tenantid, + self.timelineid, + self.key_range.start, + self.key_range.end, + self.lsn_range.start, + self.lsn_range.end ); - println!("--- seg sizes ---"); let inner = self.load()?; - for (k, v) in inner.seg_sizes.as_slice() { - println!(" {}: {}", k, v); - } - println!("--- page versions ---"); let path = self.path(); let file = std::fs::File::open(&path)?; let book = Book::new(file)?; + let chapter = book.chapter_reader(VALUES_CHAPTER)?; - let chapter = book.chapter_reader(PAGE_VERSIONS_CHAPTER)?; - for ((blk, lsn), blob_range) in inner.page_version_metas.as_slice() { - let mut desc = String::new(); + let mut values: Vec<(&Key, &VecMap)> = inner.index.iter().collect(); + values.sort_by_key(|k| k.0); - let buf = read_blob(&chapter, blob_range)?; - let pv = PageVersion::des(&buf)?; + for (key, versions) in values { + for (lsn, blob_ref) in versions.as_slice() { + let mut desc = String::new(); + let mut buf = vec![0u8; blob_ref.size()]; + chapter.read_exact_at(&mut buf, blob_ref.pos())?; + let val = Value::des(&buf); - match pv { - PageVersion::Page(img) => { - write!(&mut desc, " img {} bytes", img.len())?; - } - PageVersion::Wal(rec) => { - let wal_desc = walrecord::describe_wal_record(&rec); - write!( - &mut desc, - " rec {} bytes will_init: {} {}", - blob_range.size, - rec.will_init(), - wal_desc - )?; + match val { + Ok(Value::Image(img)) => { + write!(&mut desc, " img {} bytes", img.len())?; + } + Ok(Value::WalRecord(rec)) => { + let wal_desc = walrecord::describe_wal_record(&rec); + write!( + &mut desc, + " rec {} bytes will_init: {} {}", + buf.len(), + rec.will_init(), + wal_desc + )?; + } + Err(err) => { + write!(&mut desc, " DESERIALIZATION ERROR: {}", err)?; + } } + println!(" key {} at {}: {}", key, lsn, desc); } - - println!(" blk {} at {}: {}", blk, lsn, desc); } Ok(()) @@ -475,18 +402,13 @@ impl DeltaLayer { } } - let chapter = book.read_chapter(PAGE_VERSION_METAS_CHAPTER)?; - let page_version_metas = VecMap::des(&chapter)?; - - let chapter = book.read_chapter(SEG_SIZES_CHAPTER)?; - let seg_sizes = VecMap::des(&chapter)?; + let chapter = book.read_chapter(INDEX_CHAPTER)?; + let index = HashMap::des(&chapter)?; debug!("loaded from {}", &path.display()); - inner.page_version_metas = page_version_metas; - inner.seg_sizes = seg_sizes; + inner.index = index; inner.loaded = true; - Ok(()) } @@ -501,15 +423,12 @@ impl DeltaLayer { path_or_conf: PathOrConf::Conf(conf), timelineid, tenantid, - seg: filename.seg, - start_lsn: filename.start_lsn, - end_lsn: filename.end_lsn, - dropped: filename.dropped, + key_range: filename.key_range.clone(), + lsn_range: filename.lsn_range.clone(), inner: RwLock::new(DeltaLayerInner { loaded: false, book: None, - page_version_metas: VecMap::default(), - seg_sizes: VecMap::default(), + index: HashMap::default(), }), } } @@ -519,7 +438,7 @@ impl DeltaLayer { /// This variant is only used for debugging purposes, by the 'dump_layerfile' binary. pub fn new_for_path(path: &Path, book: &Book) -> Result where - F: std::os::unix::prelude::FileExt, + F: FileExt, { let chapter = book.read_chapter(SUMMARY_CHAPTER)?; let summary = Summary::des(&chapter)?; @@ -528,25 +447,20 @@ impl DeltaLayer { path_or_conf: PathOrConf::Path(path.to_path_buf()), timelineid: summary.timelineid, tenantid: summary.tenantid, - seg: summary.seg, - start_lsn: summary.start_lsn, - end_lsn: summary.end_lsn, - dropped: summary.dropped, + key_range: summary.key_range, + lsn_range: summary.lsn_range, inner: RwLock::new(DeltaLayerInner { loaded: false, book: None, - page_version_metas: VecMap::default(), - seg_sizes: VecMap::default(), + index: HashMap::default(), }), }) } fn layer_name(&self) -> DeltaFileName { DeltaFileName { - seg: self.seg, - start_lsn: self.start_lsn, - end_lsn: self.end_lsn, - dropped: self.dropped, + key_range: self.key_range.clone(), + lsn_range: self.lsn_range.clone(), } } @@ -567,24 +481,24 @@ impl DeltaLayer { /// /// 1. Create the DeltaLayerWriter by calling DeltaLayerWriter::new(...) /// -/// 2. Write the contents by calling `put_page_version` for every page +/// 2. Write the contents by calling `put_value` for every page /// version to store in the layer. /// /// 3. Call `finish`. /// pub struct DeltaLayerWriter { conf: &'static PageServerConf, + path: PathBuf, timelineid: ZTimelineId, tenantid: ZTenantId, - seg: SegmentTag, - start_lsn: Lsn, - end_lsn: Lsn, - dropped: bool, - page_version_writer: ChapterWriter>, - pv_offset: u64, + key_start: Key, + lsn_range: Range, - page_version_metas: VecMap<(SegmentBlk, Lsn), BlobRange>, + index: HashMap>, + + values_writer: ChapterWriter>, + end_offset: u64, } impl DeltaLayerWriter { @@ -595,94 +509,86 @@ impl DeltaLayerWriter { conf: &'static PageServerConf, timelineid: ZTimelineId, tenantid: ZTenantId, - seg: SegmentTag, - start_lsn: Lsn, - end_lsn: Lsn, - dropped: bool, + key_start: Key, + lsn_range: Range, ) -> Result { - // Create the file + // Create the file initially with a temporary filename. We don't know + // the end key yet, so we cannot form the final filename yet. We will + // rename it when we're done. // // Note: This overwrites any existing file. There shouldn't be any. // FIXME: throw an error instead? - let path = DeltaLayer::path_for( - &PathOrConf::Conf(conf), - timelineid, - tenantid, - &DeltaFileName { - seg, - start_lsn, - end_lsn, - dropped, - }, - ); + let path = conf.timeline_path(&timelineid, &tenantid).join(format!( + "{}-XXX__{:016X}-{:016X}.temp", + key_start, + u64::from(lsn_range.start), + u64::from(lsn_range.end) + )); let file = VirtualFile::create(&path)?; let buf_writer = BufWriter::new(file); let book = BookWriter::new(buf_writer, DELTA_FILE_MAGIC)?; // Open the page-versions chapter for writing. The calls to - // `put_page_version` will use this to write the contents. - let page_version_writer = book.new_chapter(PAGE_VERSIONS_CHAPTER); + // `put_value` will use this to write the contents. + let values_writer = book.new_chapter(VALUES_CHAPTER); Ok(DeltaLayerWriter { conf, + path, timelineid, tenantid, - seg, - start_lsn, - end_lsn, - dropped, - page_version_writer, - page_version_metas: VecMap::default(), - pv_offset: 0, + key_start, + lsn_range, + index: HashMap::new(), + values_writer, + end_offset: 0, }) } /// - /// Append a page version to the file. + /// Append a key-value pair to the file. /// - /// 'buf' is a serialized PageVersion. - /// The page versions must be appended in blknum, lsn order. + /// The values must be appended in key, lsn order. /// - pub fn put_page_version(&mut self, blknum: SegmentBlk, lsn: Lsn, buf: &[u8]) -> Result<()> { + pub fn put_value(&mut self, key: Key, lsn: Lsn, val: Value) -> Result<()> { + //info!("DELTA: key {} at {} on {}", key, lsn, self.path.display()); + assert!(self.lsn_range.start <= lsn); // Remember the offset and size metadata. The metadata is written // to a separate chapter, in `finish`. - let blob_range = BlobRange { - offset: self.pv_offset, - size: buf.len(), - }; - self.page_version_metas - .append((blknum, lsn), blob_range) - .unwrap(); - - // write the page version - self.page_version_writer.write_all(buf)?; - self.pv_offset += buf.len() as u64; + let off = self.end_offset; + let buf = Value::ser(&val)?; + let len = buf.len(); + self.values_writer.write_all(&buf)?; + self.end_offset += len as u64; + let vec_map = self.index.entry(key).or_default(); + let blob_ref = BlobRef::new(off, len, val.will_init()); + let old = vec_map.append_or_update_last(lsn, blob_ref).unwrap().0; + if old.is_some() { + // We already had an entry for this LSN. That's odd.. + bail!( + "Value for {} at {} already exists in delta layer being built", + key, + lsn + ); + } Ok(()) } + pub fn size(&self) -> u64 { + self.end_offset + } + /// /// Finish writing the delta layer. /// - /// 'seg_sizes' is a list of size changes to store with the actual data. - /// - pub fn finish(self, seg_sizes: VecMap) -> anyhow::Result { - // Close the page-versions chapter - let book = self.page_version_writer.close()?; + pub fn finish(self, key_end: Key) -> anyhow::Result { + // Close the values chapter + let book = self.values_writer.close()?; - // Write out page versions metadata - let mut chapter = book.new_chapter(PAGE_VERSION_METAS_CHAPTER); - let buf = VecMap::ser(&self.page_version_metas)?; - chapter.write_all(&buf)?; - let book = chapter.close()?; - - if self.seg.rel.is_blocky() { - ensure!(!seg_sizes.is_empty()); - } - - // and seg_sizes to separate chapter - let mut chapter = book.new_chapter(SEG_SIZES_CHAPTER); - let buf = VecMap::ser(&seg_sizes)?; + // Write out the index + let mut chapter = book.new_chapter(INDEX_CHAPTER); + let buf = HashMap::ser(&self.index)?; chapter.write_all(&buf)?; let book = chapter.close()?; @@ -690,12 +596,8 @@ impl DeltaLayerWriter { let summary = Summary { tenantid: self.tenantid, timelineid: self.timelineid, - seg: self.seg, - - start_lsn: self.start_lsn, - end_lsn: self.end_lsn, - - dropped: self.dropped, + key_range: self.key_start..key_end, + lsn_range: self.lsn_range.clone(), }; Summary::ser_into(&summary, &mut chapter)?; let book = chapter.close()?; @@ -710,20 +612,111 @@ impl DeltaLayerWriter { path_or_conf: PathOrConf::Conf(self.conf), tenantid: self.tenantid, timelineid: self.timelineid, - seg: self.seg, - start_lsn: self.start_lsn, - end_lsn: self.end_lsn, - dropped: self.dropped, + key_range: self.key_start..key_end, + lsn_range: self.lsn_range.clone(), inner: RwLock::new(DeltaLayerInner { loaded: false, + index: HashMap::new(), book: None, - page_version_metas: VecMap::default(), - seg_sizes: VecMap::default(), }), }; - trace!("created delta layer {}", &layer.path().display()); + // Rename the file to its final name + // + // Note: This overwrites any existing file. There shouldn't be any. + // FIXME: throw an error instead? + let final_path = DeltaLayer::path_for( + &PathOrConf::Conf(self.conf), + self.timelineid, + self.tenantid, + &DeltaFileName { + key_range: self.key_start..key_end, + lsn_range: self.lsn_range, + }, + ); + std::fs::rename(self.path, &final_path)?; + + trace!("created delta layer {}", final_path.display()); Ok(layer) } + + pub fn abort(self) { + match self.values_writer.close() { + Ok(book) => { + if let Err(err) = book.close() { + error!("error while closing delta layer file: {}", err); + } + } + Err(err) => { + error!("error while closing chapter writer: {}", err); + } + } + if let Err(err) = std::fs::remove_file(self.path) { + error!("error removing unfinished delta layer file: {}", err); + } + } +} + +/// +/// Iterator over all key-value pairse stored in a delta layer +/// +/// FIXME: This creates a Vector to hold the offsets of all key value pairs. +/// That takes up quite a lot of memory. Should do this in a more streaming +/// fashion. +/// +struct DeltaValueIter { + all_offsets: Vec<(Key, Lsn, BlobRef)>, + next_idx: usize, + data: Vec, +} + +impl Iterator for DeltaValueIter { + type Item = Result<(Key, Lsn, Value)>; + + fn next(&mut self) -> Option { + self.next_res().transpose() + } +} + +impl DeltaValueIter { + fn new(inner: RwLockReadGuard) -> Result { + let mut index: Vec<(&Key, &VecMap)> = inner.index.iter().collect(); + index.sort_by_key(|x| x.0); + + let mut all_offsets: Vec<(Key, Lsn, BlobRef)> = Vec::new(); + for (key, vec_map) in index.iter() { + for (lsn, blob_ref) in vec_map.as_slice().iter() { + all_offsets.push((**key, *lsn, *blob_ref)); + } + } + + let values_reader = inner + .book + .as_ref() + .expect("should be loaded in load call above") + .chapter_reader(VALUES_CHAPTER)?; + let file_size = values_reader.len() as usize; + let mut layer = DeltaValueIter { + all_offsets, + next_idx: 0, + data: vec![0u8; file_size], + }; + values_reader.read_exact_at(&mut layer.data, 0)?; + + Ok(layer) + } + + fn next_res(&mut self) -> Result> { + if self.next_idx < self.all_offsets.len() { + let (key, lsn, blob_ref) = self.all_offsets[self.next_idx]; + let offs = blob_ref.pos() as usize; + let size = blob_ref.size(); + let val = Value::des(&self.data[offs..offs + size])?; + self.next_idx += 1; + Ok(Some((key, lsn, val))) + } else { + Ok(None) + } + } } diff --git a/pageserver/src/layered_repository/filename.rs b/pageserver/src/layered_repository/filename.rs index df23700dfd..cd63f014c4 100644 --- a/pageserver/src/layered_repository/filename.rs +++ b/pageserver/src/layered_repository/filename.rs @@ -2,29 +2,52 @@ //! Helper functions for dealing with filenames of the image and delta layer files. //! use crate::config::PageServerConf; -use crate::layered_repository::storage_layer::SegmentTag; -use crate::relish::*; +use crate::repository::Key; +use std::cmp::Ordering; use std::fmt; +use std::ops::Range; use std::path::PathBuf; use zenith_utils::lsn::Lsn; // Note: LayeredTimeline::load_layer_map() relies on this sort order -#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)] +#[derive(Debug, PartialEq, Eq, Clone)] pub struct DeltaFileName { - pub seg: SegmentTag, - pub start_lsn: Lsn, - pub end_lsn: Lsn, - pub dropped: bool, + pub key_range: Range, + pub lsn_range: Range, +} + +impl PartialOrd for DeltaFileName { + fn partial_cmp(&self, other: &Self) -> Option { + Some(self.cmp(other)) + } +} + +impl Ord for DeltaFileName { + fn cmp(&self, other: &Self) -> Ordering { + let mut cmp; + + cmp = self.key_range.start.cmp(&other.key_range.start); + if cmp != Ordering::Equal { + return cmp; + } + cmp = self.key_range.end.cmp(&other.key_range.end); + if cmp != Ordering::Equal { + return cmp; + } + cmp = self.lsn_range.start.cmp(&other.lsn_range.start); + if cmp != Ordering::Equal { + return cmp; + } + cmp = self.lsn_range.end.cmp(&other.lsn_range.end); + + cmp + } } /// Represents the filename of a DeltaLayer /// -/// ______ -/// -/// or if it was dropped: -/// -/// _______DROPPED +/// -__- /// impl DeltaFileName { /// @@ -32,234 +55,123 @@ impl DeltaFileName { /// match the expected pattern. /// pub fn parse_str(fname: &str) -> Option { - let rel; - let mut parts; - if let Some(rest) = fname.strip_prefix("rel_") { - parts = rest.split('_'); - rel = RelishTag::Relation(RelTag { - spcnode: parts.next()?.parse::().ok()?, - dbnode: parts.next()?.parse::().ok()?, - relnode: parts.next()?.parse::().ok()?, - forknum: parts.next()?.parse::().ok()?, - }); - } else if let Some(rest) = fname.strip_prefix("pg_xact_") { - parts = rest.split('_'); - rel = RelishTag::Slru { - slru: SlruKind::Clog, - segno: u32::from_str_radix(parts.next()?, 16).ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_multixact_members_") { - parts = rest.split('_'); - rel = RelishTag::Slru { - slru: SlruKind::MultiXactMembers, - segno: u32::from_str_radix(parts.next()?, 16).ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_multixact_offsets_") { - parts = rest.split('_'); - rel = RelishTag::Slru { - slru: SlruKind::MultiXactOffsets, - segno: u32::from_str_radix(parts.next()?, 16).ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_filenodemap_") { - parts = rest.split('_'); - rel = RelishTag::FileNodeMap { - spcnode: parts.next()?.parse::().ok()?, - dbnode: parts.next()?.parse::().ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_twophase_") { - parts = rest.split('_'); - rel = RelishTag::TwoPhase { - xid: parts.next()?.parse::().ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_control_checkpoint_") { - parts = rest.split('_'); - rel = RelishTag::Checkpoint; - } else if let Some(rest) = fname.strip_prefix("pg_control_") { - parts = rest.split('_'); - rel = RelishTag::ControlFile; - } else { + let mut parts = fname.split("__"); + let mut key_parts = parts.next()?.split('-'); + let mut lsn_parts = parts.next()?.split('-'); + + let key_start_str = key_parts.next()?; + let key_end_str = key_parts.next()?; + let lsn_start_str = lsn_parts.next()?; + let lsn_end_str = lsn_parts.next()?; + if parts.next().is_some() || key_parts.next().is_some() || key_parts.next().is_some() { return None; } - let segno = parts.next()?.parse::().ok()?; + let key_start = Key::from_hex(key_start_str).ok()?; + let key_end = Key::from_hex(key_end_str).ok()?; - let seg = SegmentTag { rel, segno }; + let start_lsn = Lsn::from_hex(lsn_start_str).ok()?; + let end_lsn = Lsn::from_hex(lsn_end_str).ok()?; - let start_lsn = Lsn::from_hex(parts.next()?).ok()?; - let end_lsn = Lsn::from_hex(parts.next()?).ok()?; - - let mut dropped = false; - if let Some(suffix) = parts.next() { - if suffix == "DROPPED" { - dropped = true; - } else { - return None; - } - } - if parts.next().is_some() { + if start_lsn >= end_lsn { return None; + // or panic? + } + + if key_start >= key_end { + return None; + // or panic? } Some(DeltaFileName { - seg, - start_lsn, - end_lsn, - dropped, + key_range: key_start..key_end, + lsn_range: start_lsn..end_lsn, }) } } impl fmt::Display for DeltaFileName { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - let basename = match self.seg.rel { - RelishTag::Relation(reltag) => format!( - "rel_{}_{}_{}_{}", - reltag.spcnode, reltag.dbnode, reltag.relnode, reltag.forknum - ), - RelishTag::Slru { - slru: SlruKind::Clog, - segno, - } => format!("pg_xact_{:04X}", segno), - RelishTag::Slru { - slru: SlruKind::MultiXactMembers, - segno, - } => format!("pg_multixact_members_{:04X}", segno), - RelishTag::Slru { - slru: SlruKind::MultiXactOffsets, - segno, - } => format!("pg_multixact_offsets_{:04X}", segno), - RelishTag::FileNodeMap { spcnode, dbnode } => { - format!("pg_filenodemap_{}_{}", spcnode, dbnode) - } - RelishTag::TwoPhase { xid } => format!("pg_twophase_{}", xid), - RelishTag::Checkpoint => "pg_control_checkpoint".to_string(), - RelishTag::ControlFile => "pg_control".to_string(), - }; - write!( f, - "{}_{}_{:016X}_{:016X}{}", - basename, - self.seg.segno, - u64::from(self.start_lsn), - u64::from(self.end_lsn), - if self.dropped { "_DROPPED" } else { "" } + "{}-{}__{:016X}-{:016X}", + self.key_range.start, + self.key_range.end, + u64::from(self.lsn_range.start), + u64::from(self.lsn_range.end), ) } } -#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)] +#[derive(Debug, PartialEq, Eq, Clone)] pub struct ImageFileName { - pub seg: SegmentTag, + pub key_range: Range, pub lsn: Lsn, } +impl PartialOrd for ImageFileName { + fn partial_cmp(&self, other: &Self) -> Option { + Some(self.cmp(other)) + } +} + +impl Ord for ImageFileName { + fn cmp(&self, other: &Self) -> Ordering { + let mut cmp; + + cmp = self.key_range.start.cmp(&other.key_range.start); + if cmp != Ordering::Equal { + return cmp; + } + cmp = self.key_range.end.cmp(&other.key_range.end); + if cmp != Ordering::Equal { + return cmp; + } + cmp = self.lsn.cmp(&other.lsn); + + cmp + } +} + /// /// Represents the filename of an ImageLayer /// -/// _____ -/// +/// -__ impl ImageFileName { /// /// Parse a string as an image file name. Returns None if the filename does not /// match the expected pattern. /// pub fn parse_str(fname: &str) -> Option { - let rel; - let mut parts; - if let Some(rest) = fname.strip_prefix("rel_") { - parts = rest.split('_'); - rel = RelishTag::Relation(RelTag { - spcnode: parts.next()?.parse::().ok()?, - dbnode: parts.next()?.parse::().ok()?, - relnode: parts.next()?.parse::().ok()?, - forknum: parts.next()?.parse::().ok()?, - }); - } else if let Some(rest) = fname.strip_prefix("pg_xact_") { - parts = rest.split('_'); - rel = RelishTag::Slru { - slru: SlruKind::Clog, - segno: u32::from_str_radix(parts.next()?, 16).ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_multixact_members_") { - parts = rest.split('_'); - rel = RelishTag::Slru { - slru: SlruKind::MultiXactMembers, - segno: u32::from_str_radix(parts.next()?, 16).ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_multixact_offsets_") { - parts = rest.split('_'); - rel = RelishTag::Slru { - slru: SlruKind::MultiXactOffsets, - segno: u32::from_str_radix(parts.next()?, 16).ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_filenodemap_") { - parts = rest.split('_'); - rel = RelishTag::FileNodeMap { - spcnode: parts.next()?.parse::().ok()?, - dbnode: parts.next()?.parse::().ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_twophase_") { - parts = rest.split('_'); - rel = RelishTag::TwoPhase { - xid: parts.next()?.parse::().ok()?, - }; - } else if let Some(rest) = fname.strip_prefix("pg_control_checkpoint_") { - parts = rest.split('_'); - rel = RelishTag::Checkpoint; - } else if let Some(rest) = fname.strip_prefix("pg_control_") { - parts = rest.split('_'); - rel = RelishTag::ControlFile; - } else { + let mut parts = fname.split("__"); + let mut key_parts = parts.next()?.split('-'); + + let key_start_str = key_parts.next()?; + let key_end_str = key_parts.next()?; + let lsn_str = parts.next()?; + if parts.next().is_some() || key_parts.next().is_some() { return None; } - let segno = parts.next()?.parse::().ok()?; + let key_start = Key::from_hex(key_start_str).ok()?; + let key_end = Key::from_hex(key_end_str).ok()?; - let seg = SegmentTag { rel, segno }; + let lsn = Lsn::from_hex(lsn_str).ok()?; - let lsn = Lsn::from_hex(parts.next()?).ok()?; - - if parts.next().is_some() { - return None; - } - - Some(ImageFileName { seg, lsn }) + Some(ImageFileName { + key_range: key_start..key_end, + lsn, + }) } } impl fmt::Display for ImageFileName { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - let basename = match self.seg.rel { - RelishTag::Relation(reltag) => format!( - "rel_{}_{}_{}_{}", - reltag.spcnode, reltag.dbnode, reltag.relnode, reltag.forknum - ), - RelishTag::Slru { - slru: SlruKind::Clog, - segno, - } => format!("pg_xact_{:04X}", segno), - RelishTag::Slru { - slru: SlruKind::MultiXactMembers, - segno, - } => format!("pg_multixact_members_{:04X}", segno), - RelishTag::Slru { - slru: SlruKind::MultiXactOffsets, - segno, - } => format!("pg_multixact_offsets_{:04X}", segno), - RelishTag::FileNodeMap { spcnode, dbnode } => { - format!("pg_filenodemap_{}_{}", spcnode, dbnode) - } - RelishTag::TwoPhase { xid } => format!("pg_twophase_{}", xid), - RelishTag::Checkpoint => "pg_control_checkpoint".to_string(), - RelishTag::ControlFile => "pg_control".to_string(), - }; - write!( f, - "{}_{}_{:016X}", - basename, - self.seg.segno, + "{}-{}__{:016X}", + self.key_range.start, + self.key_range.end, u64::from(self.lsn), ) } diff --git a/pageserver/src/layered_repository/global_layer_map.rs b/pageserver/src/layered_repository/global_layer_map.rs deleted file mode 100644 index 169a89650a..0000000000 --- a/pageserver/src/layered_repository/global_layer_map.rs +++ /dev/null @@ -1,142 +0,0 @@ -//! -//! Global registry of open layers. -//! -//! Whenever a new in-memory layer is created to hold incoming WAL, it is registered -//! in [`GLOBAL_LAYER_MAP`], so that we can keep track of the total number of -//! in-memory layers in the system, and know when we need to evict some to release -//! memory. -//! -//! Each layer is assigned a unique ID when it's registered in the global registry. -//! The ID can be used to relocate the layer later, without having to hold locks. -//! - -use std::sync::atomic::{AtomicU8, Ordering}; -use std::sync::{Arc, RwLock}; - -use super::inmemory_layer::InMemoryLayer; - -use lazy_static::lazy_static; - -const MAX_USAGE_COUNT: u8 = 5; - -lazy_static! { - pub static ref GLOBAL_LAYER_MAP: RwLock = - RwLock::new(InMemoryLayers::default()); -} - -// TODO these types can probably be smaller -#[derive(PartialEq, Eq, Clone, Copy)] -pub struct LayerId { - index: usize, - tag: u64, // to avoid ABA problem -} - -enum SlotData { - Occupied(Arc), - /// Vacant slots form a linked list, the value is the index - /// of the next vacant slot in the list. - Vacant(Option), -} - -struct Slot { - tag: u64, - data: SlotData, - usage_count: AtomicU8, // for clock algorithm -} - -#[derive(Default)] -pub struct InMemoryLayers { - slots: Vec, - num_occupied: usize, - - // Head of free-slot list. - next_empty_slot_idx: Option, -} - -impl InMemoryLayers { - pub fn insert(&mut self, layer: Arc) -> LayerId { - let slot_idx = match self.next_empty_slot_idx { - Some(slot_idx) => slot_idx, - None => { - let idx = self.slots.len(); - self.slots.push(Slot { - tag: 0, - data: SlotData::Vacant(None), - usage_count: AtomicU8::new(0), - }); - idx - } - }; - let slots_len = self.slots.len(); - - let slot = &mut self.slots[slot_idx]; - - match slot.data { - SlotData::Occupied(_) => { - panic!("an occupied slot was in the free list"); - } - SlotData::Vacant(next_empty_slot_idx) => { - self.next_empty_slot_idx = next_empty_slot_idx; - } - } - - slot.data = SlotData::Occupied(layer); - slot.usage_count.store(1, Ordering::Relaxed); - - self.num_occupied += 1; - assert!(self.num_occupied <= slots_len); - - LayerId { - index: slot_idx, - tag: slot.tag, - } - } - - pub fn get(&self, layer_id: &LayerId) -> Option> { - let slot = self.slots.get(layer_id.index)?; // TODO should out of bounds indexes just panic? - if slot.tag != layer_id.tag { - return None; - } - - if let SlotData::Occupied(layer) = &slot.data { - let _ = slot.usage_count.fetch_update( - Ordering::Relaxed, - Ordering::Relaxed, - |old_usage_count| { - if old_usage_count < MAX_USAGE_COUNT { - Some(old_usage_count + 1) - } else { - None - } - }, - ); - Some(Arc::clone(layer)) - } else { - None - } - } - - // TODO this won't be a public API in the future - pub fn remove(&mut self, layer_id: &LayerId) { - let slot = &mut self.slots[layer_id.index]; - - if slot.tag != layer_id.tag { - return; - } - - match &slot.data { - SlotData::Occupied(_layer) => { - // TODO evict the layer - } - SlotData::Vacant(_) => unimplemented!(), - } - - slot.data = SlotData::Vacant(self.next_empty_slot_idx); - self.next_empty_slot_idx = Some(layer_id.index); - - assert!(self.num_occupied > 0); - self.num_occupied -= 1; - - slot.tag = slot.tag.wrapping_add(1); - } -} diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs index 5b8ec46452..ab51c36cae 100644 --- a/pageserver/src/layered_repository/image_layer.rs +++ b/pageserver/src/layered_repository/image_layer.rs @@ -1,55 +1,54 @@ -//! An ImageLayer represents an image or a snapshot of a segment at one particular LSN. -//! It is stored in a file on disk. +//! An ImageLayer represents an image or a snapshot of a key-range at +//! one particular LSN. It contains an image of all key-value pairs +//! in its key-range. Any key that falls into the image layer's range +//! but does not exist in the layer, does not exist. //! -//! On disk, the image files are stored in timelines/ directory. -//! Currently, there are no subdirectories, and each image layer file is named like this: +//! An image layer is stored in a file on disk. The file is stored in +//! timelines/ directory. Currently, there are no +//! subdirectories, and each image layer file is named like this: //! -//! Note that segno is -//! _____ +//! -__ //! //! For example: //! -//! 1663_13990_2609_0_5_000000000169C348 +//! 000000067F000032BE0000400000000070B6-000000067F000032BE0000400000000080B6__00000000346BC568 //! //! An image file is constructed using the 'bookfile' crate. //! //! Only metadata is loaded into memory by the load function. //! When images are needed, they are read directly from disk. //! -//! For blocky relishes, the images are stored in BLOCKY_IMAGES_CHAPTER. -//! All the images are required to be BLOCK_SIZE, which allows for random access. -//! -//! For non-blocky relishes, the image can be found in NONBLOCKY_IMAGE_CHAPTER. -//! use crate::config::PageServerConf; use crate::layered_repository::filename::{ImageFileName, PathOrConf}; use crate::layered_repository::storage_layer::{ - Layer, PageReconstructData, PageReconstructResult, SegmentBlk, SegmentTag, + BlobRef, Layer, ValueReconstructResult, ValueReconstructState, }; -use crate::layered_repository::RELISH_SEG_SIZE; +use crate::repository::{Key, Value}; use crate::virtual_file::VirtualFile; +use crate::IMAGE_FILE_MAGIC; use crate::{ZTenantId, ZTimelineId}; -use anyhow::{anyhow, bail, ensure, Context, Result}; +use anyhow::{bail, ensure, Context, Result}; use bytes::Bytes; use log::*; use serde::{Deserialize, Serialize}; -use std::convert::TryInto; +use std::collections::HashMap; use std::fs; use std::io::{BufWriter, Write}; +use std::ops::Range; use std::path::{Path, PathBuf}; -use std::sync::{RwLock, RwLockReadGuard}; +use std::sync::{RwLock, RwLockReadGuard, TryLockError}; use bookfile::{Book, BookWriter, ChapterWriter}; use zenith_utils::bin_ser::BeSer; use zenith_utils::lsn::Lsn; -// Magic constant to identify a Zenith segment image file -pub const IMAGE_FILE_MAGIC: u32 = 0x5A616E01 + 1; +/// Mapping from (key, lsn) -> page/WAL record +/// byte ranges in VALUES_CHAPTER +static INDEX_CHAPTER: u64 = 1; /// Contains each block in block # order -const BLOCKY_IMAGES_CHAPTER: u64 = 1; -const NONBLOCKY_IMAGE_CHAPTER: u64 = 2; +const VALUES_CHAPTER: u64 = 2; /// Contains the [`Summary`] struct const SUMMARY_CHAPTER: u64 = 3; @@ -58,7 +57,7 @@ const SUMMARY_CHAPTER: u64 = 3; struct Summary { tenantid: ZTenantId, timelineid: ZTimelineId, - seg: SegmentTag, + key_range: Range, lsn: Lsn, } @@ -68,19 +67,17 @@ impl From<&ImageLayer> for Summary { Self { tenantid: layer.tenantid, timelineid: layer.timelineid, - seg: layer.seg, + key_range: layer.key_range.clone(), lsn: layer.lsn, } } } -const BLOCK_SIZE: usize = 8192; - /// /// ImageLayer is the in-memory data structure associated with an on-disk image /// file. We keep an ImageLayer in memory for each file, in the LayerMap. If a -/// layer is in "loaded" state, we have a copy of the file in memory, in 'inner'. +/// layer is in "loaded" state, we have a copy of the index in memory, in 'inner'. /// Otherwise the struct is just a placeholder for a file that exists on disk, /// and it needs to be loaded before using it in queries. /// @@ -88,7 +85,7 @@ pub struct ImageLayer { path_or_conf: PathOrConf, pub tenantid: ZTenantId, pub timelineid: ZTimelineId, - pub seg: SegmentTag, + pub key_range: Range, // This entry contains an image of all pages as of this LSN pub lsn: Lsn, @@ -96,18 +93,16 @@ pub struct ImageLayer { inner: RwLock, } -#[derive(Clone)] -enum ImageType { - Blocky { num_blocks: SegmentBlk }, - NonBlocky, -} - pub struct ImageLayerInner { - /// If None, the 'image_type' has not been loaded into memory yet. + /// If false, the 'index' has not been loaded into memory yet. + loaded: bool, + + /// The underlying (virtual) file handle. None if the layer hasn't been loaded + /// yet. book: Option>, - /// Derived from filename and bookfile chapter metadata - image_type: ImageType, + /// offset of each value + index: HashMap, } impl Layer for ImageLayer { @@ -123,98 +118,82 @@ impl Layer for ImageLayer { self.timelineid } - fn get_seg_tag(&self) -> SegmentTag { - self.seg + fn get_key_range(&self) -> Range { + self.key_range.clone() } - fn is_dropped(&self) -> bool { - false - } - - fn get_start_lsn(&self) -> Lsn { - self.lsn - } - - fn get_end_lsn(&self) -> Lsn { + fn get_lsn_range(&self) -> Range { // End-bound is exclusive - self.lsn + 1 + self.lsn..(self.lsn + 1) } /// Look up given page in the file - fn get_page_reconstruct_data( + fn get_value_reconstruct_data( &self, - blknum: SegmentBlk, - lsn: Lsn, - reconstruct_data: &mut PageReconstructData, - ) -> anyhow::Result { - ensure!((0..RELISH_SEG_SIZE).contains(&blknum)); - ensure!(lsn >= self.lsn); - - match reconstruct_data.page_img { - Some((cached_lsn, _)) if self.lsn <= cached_lsn => { - return Ok(PageReconstructResult::Complete) - } - _ => {} - } + key: Key, + lsn_range: Range, + reconstruct_state: &mut ValueReconstructState, + ) -> anyhow::Result { + assert!(self.key_range.contains(&key)); + assert!(lsn_range.end >= self.lsn); let inner = self.load()?; - let buf = match &inner.image_type { - ImageType::Blocky { num_blocks } => { - // Check if the request is beyond EOF - if blknum >= *num_blocks { - return Ok(PageReconstructResult::Missing(lsn)); - } + if let Some(blob_ref) = inner.index.get(&key) { + let chapter = inner + .book + .as_ref() + .unwrap() + .chapter_reader(VALUES_CHAPTER)?; - let mut buf = vec![0u8; BLOCK_SIZE]; - let offset = BLOCK_SIZE as u64 * blknum as u64; - - let chapter = inner - .book - .as_ref() - .unwrap() - .chapter_reader(BLOCKY_IMAGES_CHAPTER)?; - - chapter.read_exact_at(&mut buf, offset).with_context(|| { + let mut blob = vec![0; blob_ref.size()]; + chapter + .read_exact_at(&mut blob, blob_ref.pos()) + .with_context(|| { format!( - "failed to read page from data file {} at offset {}", + "failed to read {} bytes from data file {} at offset {}", + blob_ref.size(), self.filename().display(), - offset + blob_ref.pos() ) })?; + let value = Bytes::from(blob); - buf - } - ImageType::NonBlocky => { - ensure!(blknum == 0); - inner - .book - .as_ref() - .unwrap() - .read_chapter(NONBLOCKY_IMAGE_CHAPTER)? - .into_vec() - } - }; - - reconstruct_data.page_img = Some((self.lsn, Bytes::from(buf))); - Ok(PageReconstructResult::Complete) - } - - /// Get size of the segment - fn get_seg_size(&self, _lsn: Lsn) -> Result { - let inner = self.load()?; - match inner.image_type { - ImageType::Blocky { num_blocks } => Ok(num_blocks), - ImageType::NonBlocky => Err(anyhow!("get_seg_size called for non-blocky segment")), + reconstruct_state.img = Some((self.lsn, value)); + Ok(ValueReconstructResult::Complete) + } else { + Ok(ValueReconstructResult::Missing) } } - /// Does this segment exist at given LSN? - fn get_seg_exists(&self, _lsn: Lsn) -> Result { - Ok(true) + fn iter(&self) -> Box>> { + todo!(); } fn unload(&self) -> Result<()> { + // Unload the index. + // + // TODO: we should access the index directly from pages on the disk, + // using the buffer cache. This load/unload mechanism is really ad hoc. + + // FIXME: In debug mode, loading and unloading the index slows + // things down so much that you get timeout errors. At least + // with the test_parallel_copy test. So as an even more ad hoc + // stopgap fix for that, only unload every on average 10 + // checkpoint cycles. + use rand::RngCore; + if rand::thread_rng().next_u32() > (u32::MAX / 10) { + return Ok(()); + } + + let mut inner = match self.inner.try_write() { + Ok(inner) => inner, + Err(TryLockError::WouldBlock) => return Ok(()), + Err(TryLockError::Poisoned(_)) => panic!("ImageLayer lock was poisoned"), + }; + inner.index = HashMap::default(); + inner.loaded = false; + Ok(()) } @@ -235,22 +214,22 @@ impl Layer for ImageLayer { /// debugging function to print out the contents of the layer fn dump(&self) -> Result<()> { println!( - "----- image layer for ten {} tli {} seg {} at {} ----", - self.tenantid, self.timelineid, self.seg, self.lsn + "----- image layer for ten {} tli {} key {}-{} at {} ----", + self.tenantid, self.timelineid, self.key_range.start, self.key_range.end, self.lsn ); let inner = self.load()?; - match inner.image_type { - ImageType::Blocky { num_blocks } => println!("({}) blocks ", num_blocks), - ImageType::NonBlocky => { - let chapter = inner - .book - .as_ref() - .unwrap() - .read_chapter(NONBLOCKY_IMAGE_CHAPTER)?; - println!("non-blocky ({} bytes)", chapter.len()); - } + let mut index_vec: Vec<(&Key, &BlobRef)> = inner.index.iter().collect(); + index_vec.sort_by_key(|x| x.1.pos()); + + for (key, blob_ref) in index_vec { + println!( + "key: {} size {} offset {}", + key, + blob_ref.size(), + blob_ref.pos() + ); } Ok(()) @@ -280,7 +259,7 @@ impl ImageLayer { loop { // Quick exit if already loaded let inner = self.inner.read().unwrap(); - if inner.book.is_some() { + if inner.loaded { return Ok(inner); } @@ -306,14 +285,16 @@ impl ImageLayer { fn load_inner(&self, inner: &mut ImageLayerInner) -> Result<()> { let path = self.path(); - let file = VirtualFile::open(&path) - .with_context(|| format!("Failed to open virtual file '{}'", path.display()))?; - let book = Book::new(file).with_context(|| { - format!( - "Failed to open virtual file '{}' as a bookfile", - path.display() - ) - })?; + + // Open the file if it's not open already. + if inner.book.is_none() { + let file = VirtualFile::open(&path) + .with_context(|| format!("Failed to open file '{}'", path.display()))?; + inner.book = Some(Book::new(file).with_context(|| { + format!("Failed to open file '{}' as a bookfile", path.display()) + })?); + } + let book = inner.book.as_ref().unwrap(); match &self.path_or_conf { PathOrConf::Conf(_) => { @@ -340,23 +321,13 @@ impl ImageLayer { } } - let image_type = if self.seg.rel.is_blocky() { - let chapter = book.chapter_reader(BLOCKY_IMAGES_CHAPTER)?; - let images_len = chapter.len(); - ensure!(images_len % BLOCK_SIZE as u64 == 0); - let num_blocks: SegmentBlk = (images_len / BLOCK_SIZE as u64).try_into()?; - ImageType::Blocky { num_blocks } - } else { - let _chapter = book.chapter_reader(NONBLOCKY_IMAGE_CHAPTER)?; - ImageType::NonBlocky - }; + let chapter = book.read_chapter(INDEX_CHAPTER)?; + let index = HashMap::des(&chapter)?; - debug!("loaded from {}", &path.display()); + info!("loaded from {}", &path.display()); - *inner = ImageLayerInner { - book: Some(book), - image_type, - }; + inner.index = index; + inner.loaded = true; Ok(()) } @@ -372,11 +343,12 @@ impl ImageLayer { path_or_conf: PathOrConf::Conf(conf), timelineid, tenantid, - seg: filename.seg, + key_range: filename.key_range.clone(), lsn: filename.lsn, inner: RwLock::new(ImageLayerInner { book: None, - image_type: ImageType::Blocky { num_blocks: 0 }, + index: HashMap::new(), + loaded: false, }), } } @@ -395,18 +367,19 @@ impl ImageLayer { path_or_conf: PathOrConf::Path(path.to_path_buf()), timelineid: summary.timelineid, tenantid: summary.tenantid, - seg: summary.seg, + key_range: summary.key_range, lsn: summary.lsn, inner: RwLock::new(ImageLayerInner { book: None, - image_type: ImageType::Blocky { num_blocks: 0 }, + index: HashMap::new(), + loaded: false, }), }) } fn layer_name(&self) -> ImageFileName { ImageFileName { - seg: self.seg, + key_range: self.key_range.clone(), lsn: self.lsn, } } @@ -435,15 +408,18 @@ impl ImageLayer { /// pub struct ImageLayerWriter { conf: &'static PageServerConf, + path: PathBuf, timelineid: ZTimelineId, tenantid: ZTenantId, - seg: SegmentTag, + key_range: Range, lsn: Lsn, - num_blocks: SegmentBlk, + values_writer: Option>>, + end_offset: u64, - page_image_writer: ChapterWriter>, - num_blocks_written: SegmentBlk, + index: HashMap, + + finished: bool, } impl ImageLayerWriter { @@ -451,9 +427,8 @@ impl ImageLayerWriter { conf: &'static PageServerConf, timelineid: ZTimelineId, tenantid: ZTenantId, - seg: SegmentTag, + key_range: &Range, lsn: Lsn, - num_blocks: SegmentBlk, ) -> anyhow::Result { // Create the file // @@ -463,70 +438,75 @@ impl ImageLayerWriter { &PathOrConf::Conf(conf), timelineid, tenantid, - &ImageFileName { seg, lsn }, + &ImageFileName { + key_range: key_range.clone(), + lsn, + }, ); + info!("new image layer {}", path.display()); let file = VirtualFile::create(&path)?; let buf_writer = BufWriter::new(file); let book = BookWriter::new(buf_writer, IMAGE_FILE_MAGIC)?; // Open the page-images chapter for writing. The calls to - // `put_page_image` will use this to write the contents. - let chapter = if seg.rel.is_blocky() { - book.new_chapter(BLOCKY_IMAGES_CHAPTER) - } else { - ensure!(num_blocks == 1); - book.new_chapter(NONBLOCKY_IMAGE_CHAPTER) - }; + // `put_image` will use this to write the contents. + let chapter = book.new_chapter(VALUES_CHAPTER); let writer = ImageLayerWriter { conf, + path, timelineid, tenantid, - seg, + key_range: key_range.clone(), lsn, - num_blocks, - page_image_writer: chapter, - num_blocks_written: 0, + values_writer: Some(chapter), + index: HashMap::new(), + end_offset: 0, + finished: false, }; Ok(writer) } /// - /// Write next page image to the file. + /// Write next value to the file. /// /// The page versions must be appended in blknum order. /// - pub fn put_page_image(&mut self, block_bytes: &[u8]) -> anyhow::Result<()> { - ensure!(self.num_blocks_written < self.num_blocks); - if self.seg.rel.is_blocky() { - ensure!(block_bytes.len() == BLOCK_SIZE); + pub fn put_image(&mut self, key: Key, img: &[u8]) -> Result<()> { + ensure!(self.key_range.contains(&key)); + let off = self.end_offset; + + if let Some(writer) = &mut self.values_writer { + let len = img.len(); + writer.write_all(img)?; + self.end_offset += len as u64; + + let old = self.index.insert(key, BlobRef::new(off, len, true)); + assert!(old.is_none()); + } else { + panic!() } - self.page_image_writer.write_all(block_bytes)?; - self.num_blocks_written += 1; + Ok(()) } - pub fn finish(self) -> anyhow::Result { - // Check that the `put_page_image' was called for every block. - ensure!(self.num_blocks_written == self.num_blocks); + pub fn finish(&mut self) -> anyhow::Result { + // Close the values chapter + let book = self.values_writer.take().unwrap().close()?; - // Close the page-images chapter - let book = self.page_image_writer.close()?; + // Write out the index + let mut chapter = book.new_chapter(INDEX_CHAPTER); + let buf = HashMap::ser(&self.index)?; + chapter.write_all(&buf)?; + let book = chapter.close()?; // Write out the summary chapter - let image_type = if self.seg.rel.is_blocky() { - ImageType::Blocky { - num_blocks: self.num_blocks, - } - } else { - ImageType::NonBlocky - }; let mut chapter = book.new_chapter(SUMMARY_CHAPTER); let summary = Summary { tenantid: self.tenantid, timelineid: self.timelineid, - seg: self.seg, + key_range: self.key_range.clone(), lsn: self.lsn, }; Summary::ser_into(&summary, &mut chapter)?; @@ -542,15 +522,31 @@ impl ImageLayerWriter { path_or_conf: PathOrConf::Conf(self.conf), timelineid: self.timelineid, tenantid: self.tenantid, - seg: self.seg, + key_range: self.key_range.clone(), lsn: self.lsn, inner: RwLock::new(ImageLayerInner { book: None, - image_type, + loaded: false, + index: HashMap::new(), }), }; trace!("created image layer {}", layer.path().display()); + self.finished = true; + Ok(layer) } } + +impl Drop for ImageLayerWriter { + fn drop(&mut self) { + if let Some(page_image_writer) = self.values_writer.take() { + if let Ok(book) = page_image_writer.close() { + let _ = book.close(); + } + } + if !self.finished { + let _ = fs::remove_file(&self.path); + } + } +} diff --git a/pageserver/src/layered_repository/inmemory_layer.rs b/pageserver/src/layered_repository/inmemory_layer.rs index fed1fb6469..b5d98a4ca3 100644 --- a/pageserver/src/layered_repository/inmemory_layer.rs +++ b/pageserver/src/layered_repository/inmemory_layer.rs @@ -1,30 +1,29 @@ -//! An in-memory layer stores recently received PageVersions. -//! The page versions are held in a BTreeMap. To avoid OOM errors, the map size is limited -//! and layers can be spilled to disk into ephemeral files. +//! An in-memory layer stores recently received key-value pairs. //! -//! And there's another BTreeMap to track the size of the relation. +//! The "in-memory" part of the name is a bit misleading: the actual page versions are +//! held in an ephemeral file, not in memory. The metadata for each page version, i.e. +//! its position in the file, is kept in memory, though. //! use crate::config::PageServerConf; use crate::layered_repository::delta_layer::{DeltaLayer, DeltaLayerWriter}; use crate::layered_repository::ephemeral_file::EphemeralFile; -use crate::layered_repository::filename::DeltaFileName; -use crate::layered_repository::image_layer::{ImageLayer, ImageLayerWriter}; use crate::layered_repository::storage_layer::{ - Layer, PageReconstructData, PageReconstructResult, PageVersion, SegmentBlk, SegmentTag, - RELISH_SEG_SIZE, + BlobRef, Layer, ValueReconstructResult, ValueReconstructState, }; -use crate::layered_repository::LayeredTimeline; -use crate::layered_repository::ZERO_PAGE; -use crate::repository::ZenithWalRecord; +use crate::repository::{Key, Value}; +use crate::walrecord; use crate::{ZTenantId, ZTimelineId}; use anyhow::{bail, ensure, Result}; -use bytes::Bytes; use log::*; use std::collections::HashMap; -use std::io::Seek; +// avoid binding to Write (conflicts with std::io::Write) +// while being able to use std::fmt::Write's methods +use std::fmt::Write as _; +use std::io::Write; +use std::ops::Range; use std::os::unix::fs::FileExt; use std::path::PathBuf; -use std::sync::{Arc, RwLock}; +use std::sync::RwLock; use zenith_utils::bin_ser::BeSer; use zenith_utils::lsn::Lsn; use zenith_utils::vec_map::VecMap; @@ -33,7 +32,6 @@ pub struct InMemoryLayer { conf: &'static PageServerConf, tenantid: ZTenantId, timelineid: ZTimelineId, - seg: SegmentTag, /// /// This layer contains all the changes from 'start_lsn'. The @@ -41,27 +39,9 @@ pub struct InMemoryLayer { /// start_lsn: Lsn, - /// - /// LSN of the oldest page version stored in this layer. - /// - /// This is different from 'start_lsn' in that we enforce that the 'start_lsn' - /// of a layer always matches the 'end_lsn' of its predecessor, even if there - /// are no page versions until at a later LSN. That way you can detect any - /// missing layer files more easily. 'oldest_lsn' is the first page version - /// actually stored in this layer. In the range between 'start_lsn' and - /// 'oldest_lsn', there are no changes to the segment. - /// 'oldest_lsn' is used to adjust 'disk_consistent_lsn' and that is why it should - /// point to the beginning of WAL record. This is the other difference with 'start_lsn' - /// which points to end of WAL record. This is why 'oldest_lsn' can be smaller than 'start_lsn'. - /// - oldest_lsn: Lsn, - /// The above fields never change. The parts that do change are in 'inner', /// and protected by mutex. inner: RwLock, - - /// Predecessor layer might be needed? - incremental: bool, } pub struct InMemoryLayerInner { @@ -69,98 +49,25 @@ pub struct InMemoryLayerInner { /// Writes are only allowed when this is None end_lsn: Option, - /// If this relation was dropped, remember when that happened. - /// The drop LSN is recorded in [`end_lsn`]. - dropped: bool, + /// + /// All versions of all pages in the layer are kept here. Indexed + /// by block number and LSN. The value is an offset into the + /// ephemeral file where the page version is stored. + /// + index: HashMap>, - /// The PageVersion structs are stored in a serialized format in this file. - /// Each serialized PageVersion is preceded by a 'u32' length field. - /// 'page_versions' map stores offsets into this file. + /// The values are stored in a serialized format in this file. + /// Each serialized Value is preceded by a 'u32' length field. + /// PerSeg::page_versions map stores offsets into this file. file: EphemeralFile, - /// Metadata about all versions of all pages in the layer is kept - /// here. Indexed by block number and LSN. The value is an offset - /// into the ephemeral file where the page version is stored. - page_versions: HashMap>, - - /// - /// `seg_sizes` tracks the size of the segment at different points in time. - /// - /// For a blocky rel, there is always one entry, at the layer's start_lsn, - /// so that determining the size never depends on the predecessor layer. For - /// a non-blocky rel, 'seg_sizes' is not used and is always empty. - /// - seg_sizes: VecMap, - - /// - /// LSN of the newest page version stored in this layer. - /// - /// The difference between 'end_lsn' and 'latest_lsn' is the same as between - /// 'start_lsn' and 'oldest_lsn'. See comments in 'oldest_lsn'. - /// - latest_lsn: Lsn, + end_offset: u64, } impl InMemoryLayerInner { fn assert_writeable(&self) { assert!(self.end_lsn.is_none()); } - - fn get_seg_size(&self, lsn: Lsn) -> SegmentBlk { - // Scan the BTreeMap backwards, starting from the given entry. - let slice = self.seg_sizes.slice_range(..=lsn); - - // We make sure there is always at least one entry - if let Some((_entry_lsn, entry)) = slice.last() { - *entry - } else { - panic!("could not find seg size in in-memory layer"); - } - } - - /// - /// Read a page version from the ephemeral file. - /// - fn read_pv(&self, off: u64) -> Result { - let mut buf = Vec::new(); - self.read_pv_bytes(off, &mut buf)?; - Ok(PageVersion::des(&buf)?) - } - - /// - /// Read a page version from the ephemeral file, as raw bytes, at - /// the given offset. The bytes are read into 'buf', which is - /// expanded if necessary. Returns the size of the page version. - /// - fn read_pv_bytes(&self, off: u64, buf: &mut Vec) -> Result { - // read length - let mut lenbuf = [0u8; 4]; - self.file.read_exact_at(&mut lenbuf, off)?; - let len = u32::from_ne_bytes(lenbuf) as usize; - - if buf.len() < len { - buf.resize(len, 0); - } - self.file.read_exact_at(&mut buf[0..len], off + 4)?; - Ok(len) - } - - fn write_pv(&mut self, pv: &PageVersion) -> Result { - // remember starting position - let pos = self.file.stream_position()?; - - // make room for the 'length' field by writing zeros as a placeholder. - self.file.seek(std::io::SeekFrom::Start(pos + 4))?; - - pv.ser_into(&mut self.file)?; - - // write the 'length' field. - let len = self.file.stream_position()? - pos - 4; - let lenbuf = u32::to_ne_bytes(len as u32); - self.file.write_all_at(&lenbuf, pos)?; - - Ok(pos) - } } impl Layer for InMemoryLayer { @@ -170,21 +77,12 @@ impl Layer for InMemoryLayer { fn filename(&self) -> PathBuf { let inner = self.inner.read().unwrap(); - let end_lsn = if let Some(drop_lsn) = inner.end_lsn { - drop_lsn - } else { - Lsn(u64::MAX) - }; + let end_lsn = inner.end_lsn.unwrap_or(Lsn(u64::MAX)); - let delta_filename = DeltaFileName { - seg: self.seg, - start_lsn: self.start_lsn, - end_lsn, - dropped: inner.dropped, - } - .to_string(); - - PathBuf::from(format!("inmem-{}", delta_filename)) + PathBuf::from(format!( + "inmem-{:016X}-{:016X}", + self.start_lsn.0, end_lsn.0 + )) } fn get_tenant_id(&self) -> ZTenantId { @@ -195,132 +93,78 @@ impl Layer for InMemoryLayer { self.timelineid } - fn get_seg_tag(&self) -> SegmentTag { - self.seg + fn get_key_range(&self) -> Range { + Key::MIN..Key::MAX } - fn get_start_lsn(&self) -> Lsn { - self.start_lsn - } - - fn get_end_lsn(&self) -> Lsn { + fn get_lsn_range(&self) -> Range { let inner = self.inner.read().unwrap(); - if let Some(end_lsn) = inner.end_lsn { + let end_lsn = if let Some(end_lsn) = inner.end_lsn { end_lsn } else { Lsn(u64::MAX) - } + }; + self.start_lsn..end_lsn } - fn is_dropped(&self) -> bool { - let inner = self.inner.read().unwrap(); - inner.dropped - } - - /// Look up given page in the cache. - fn get_page_reconstruct_data( + /// Look up given value in the layer. + fn get_value_reconstruct_data( &self, - blknum: SegmentBlk, - lsn: Lsn, - reconstruct_data: &mut PageReconstructData, - ) -> anyhow::Result { + key: Key, + lsn_range: Range, + reconstruct_state: &mut ValueReconstructState, + ) -> anyhow::Result { + ensure!(lsn_range.start <= self.start_lsn); let mut need_image = true; - ensure!((0..RELISH_SEG_SIZE).contains(&blknum)); + let inner = self.inner.read().unwrap(); - { - let inner = self.inner.read().unwrap(); - - // Scan the page versions backwards, starting from `lsn`. - if let Some(vec_map) = inner.page_versions.get(&blknum) { - let slice = vec_map.slice_range(..=lsn); - for (entry_lsn, pos) in slice.iter().rev() { - match &reconstruct_data.page_img { - Some((cached_lsn, _)) if entry_lsn <= cached_lsn => { - return Ok(PageReconstructResult::Complete) - } - _ => {} + // Scan the page versions backwards, starting from `lsn`. + if let Some(vec_map) = inner.index.get(&key) { + let slice = vec_map.slice_range(lsn_range); + for (entry_lsn, blob_ref) in slice.iter().rev() { + match &reconstruct_state.img { + Some((cached_lsn, _)) if entry_lsn <= cached_lsn => { + return Ok(ValueReconstructResult::Complete) } + _ => {} + } - let pv = inner.read_pv(*pos)?; - match pv { - PageVersion::Page(img) => { - reconstruct_data.page_img = Some((*entry_lsn, img)); + let mut buf = vec![0u8; blob_ref.size()]; + inner.file.read_exact_at(&mut buf, blob_ref.pos())?; + let value = Value::des(&buf)?; + match value { + Value::Image(img) => { + reconstruct_state.img = Some((*entry_lsn, img)); + return Ok(ValueReconstructResult::Complete); + } + Value::WalRecord(rec) => { + let will_init = rec.will_init(); + reconstruct_state.records.push((*entry_lsn, rec)); + if will_init { + // This WAL record initializes the page, so no need to go further back need_image = false; break; } - PageVersion::Wal(rec) => { - reconstruct_data.records.push((*entry_lsn, rec.clone())); - if rec.will_init() { - // This WAL record initializes the page, so no need to go further back - need_image = false; - break; - } - } } } } - - // If we didn't find any records for this, check if the request is beyond EOF - if need_image - && reconstruct_data.records.is_empty() - && self.seg.rel.is_blocky() - && blknum >= self.get_seg_size(lsn)? - { - return Ok(PageReconstructResult::Missing(self.start_lsn)); - } - - // release lock on 'inner' } + // release lock on 'inner' + // If an older page image is needed to reconstruct the page, let the - // caller know + // caller know. if need_image { - if self.incremental { - Ok(PageReconstructResult::Continue(Lsn(self.start_lsn.0 - 1))) - } else { - Ok(PageReconstructResult::Missing(self.start_lsn)) - } + Ok(ValueReconstructResult::Continue) } else { - Ok(PageReconstructResult::Complete) + Ok(ValueReconstructResult::Complete) } } - /// Get size of the relation at given LSN - fn get_seg_size(&self, lsn: Lsn) -> anyhow::Result { - ensure!(lsn >= self.start_lsn); - ensure!( - self.seg.rel.is_blocky(), - "get_seg_size() called on a non-blocky rel" - ); - - let inner = self.inner.read().unwrap(); - Ok(inner.get_seg_size(lsn)) - } - - /// Does this segment exist at given LSN? - fn get_seg_exists(&self, lsn: Lsn) -> anyhow::Result { - let inner = self.inner.read().unwrap(); - - // If the segment created after requested LSN, - // it doesn't exist in the layer. But we shouldn't - // have requested it in the first place. - ensure!(lsn >= self.start_lsn); - - // Is the requested LSN after the segment was dropped? - if inner.dropped { - if let Some(end_lsn) = inner.end_lsn { - if lsn >= end_lsn { - return Ok(false); - } - } else { - bail!("dropped in-memory layer with no end LSN"); - } - } - - // Otherwise, it exists - Ok(true) + fn iter(&self) -> Box>> { + todo!(); } /// Cannot unload anything in an in-memory layer, since there's no backing @@ -337,7 +181,8 @@ impl Layer for InMemoryLayer { } fn is_incremental(&self) -> bool { - self.incremental + // in-memory layer is always considered incremental. + true } fn is_in_memory(&self) -> bool { @@ -355,29 +200,36 @@ impl Layer for InMemoryLayer { .unwrap_or_default(); println!( - "----- in-memory layer for tli {} seg {} {}-{} {} ----", - self.timelineid, self.seg, self.start_lsn, end_str, inner.dropped, + "----- in-memory layer for tli {} LSNs {}-{} ----", + self.timelineid, self.start_lsn, end_str, ); - for (k, v) in inner.seg_sizes.as_slice() { - println!("seg_sizes {}: {}", k, v); - } - - // List the blocks in order - let mut page_versions: Vec<(&SegmentBlk, &VecMap)> = - inner.page_versions.iter().collect(); - page_versions.sort_by_key(|k| k.0); - - for (blknum, versions) in page_versions { - for (lsn, off) in versions.as_slice() { - let pv = inner.read_pv(*off); - let pv_description = match pv { - Ok(PageVersion::Page(_img)) => "page", - Ok(PageVersion::Wal(_rec)) => "wal", - Err(_err) => "INVALID", - }; - - println!("blk {} at {}: {}\n", blknum, lsn, pv_description); + let mut buf = Vec::new(); + for (key, vec_map) in inner.index.iter() { + for (lsn, blob_ref) in vec_map.as_slice() { + let mut desc = String::new(); + buf.resize(blob_ref.size(), 0); + inner.file.read_exact_at(&mut buf, blob_ref.pos())?; + let val = Value::des(&buf); + match val { + Ok(Value::Image(img)) => { + write!(&mut desc, " img {} bytes", img.len())?; + } + Ok(Value::WalRecord(rec)) => { + let wal_desc = walrecord::describe_wal_record(&rec); + write!( + &mut desc, + " rec {} bytes will_init: {} {}", + buf.len(), + rec.will_init(), + wal_desc + )?; + } + Err(err) => { + write!(&mut desc, " DESERIALIZATION ERROR: {}", err)?; + } + } + println!(" key {} at {}: {}", key, lsn, desc); } } @@ -385,23 +237,7 @@ impl Layer for InMemoryLayer { } } -/// A result of an inmemory layer data being written to disk. -pub struct LayersOnDisk { - pub delta_layers: Vec, - pub image_layers: Vec, -} - impl InMemoryLayer { - /// Return the oldest page version that's stored in this layer - pub fn get_oldest_lsn(&self) -> Lsn { - self.oldest_lsn - } - - pub fn get_latest_lsn(&self) -> Lsn { - let inner = self.inner.read().unwrap(); - inner.latest_lsn - } - /// /// Create a new, empty, in-memory layer /// @@ -409,291 +245,83 @@ impl InMemoryLayer { conf: &'static PageServerConf, timelineid: ZTimelineId, tenantid: ZTenantId, - seg: SegmentTag, start_lsn: Lsn, - oldest_lsn: Lsn, ) -> Result { trace!( - "initializing new empty InMemoryLayer for writing {} on timeline {} at {}", - seg, + "initializing new empty InMemoryLayer for writing on timeline {} at {}", timelineid, start_lsn ); - // The segment is initially empty, so initialize 'seg_sizes' with 0. - let mut seg_sizes = VecMap::default(); - if seg.rel.is_blocky() { - seg_sizes.append(start_lsn, 0).unwrap(); - } - let file = EphemeralFile::create(conf, tenantid, timelineid)?; Ok(InMemoryLayer { conf, timelineid, tenantid, - seg, start_lsn, - oldest_lsn, - incremental: false, inner: RwLock::new(InMemoryLayerInner { end_lsn: None, - dropped: false, + index: HashMap::new(), file, - page_versions: HashMap::new(), - seg_sizes, - latest_lsn: oldest_lsn, + end_offset: 0, }), }) } // Write operations - /// Remember new page version, as a WAL record over previous version - pub fn put_wal_record( - &self, - lsn: Lsn, - blknum: SegmentBlk, - rec: ZenithWalRecord, - ) -> Result { - self.put_page_version(blknum, lsn, PageVersion::Wal(rec)) - } - - /// Remember new page version, as a full page image - pub fn put_page_image(&self, blknum: SegmentBlk, lsn: Lsn, img: Bytes) -> Result { - self.put_page_version(blknum, lsn, PageVersion::Page(img)) - } - /// Common subroutine of the public put_wal_record() and put_page_image() functions. /// Adds the page version to the in-memory tree - pub fn put_page_version( - &self, - blknum: SegmentBlk, - lsn: Lsn, - pv: PageVersion, - ) -> anyhow::Result { - ensure!((0..RELISH_SEG_SIZE).contains(&blknum)); - - trace!( - "put_page_version blk {} of {} at {}/{}", - blknum, - self.seg.rel, - self.timelineid, - lsn - ); + pub fn put_value(&self, key: Key, lsn: Lsn, val: Value) -> Result<()> { + trace!("put_value key {} at {}/{}", key, self.timelineid, lsn); let mut inner = self.inner.write().unwrap(); inner.assert_writeable(); - ensure!(lsn >= inner.latest_lsn); - inner.latest_lsn = lsn; - // Write the page version to the file, and remember its offset in 'page_versions' - { - let off = inner.write_pv(&pv)?; - let vec_map = inner.page_versions.entry(blknum).or_default(); - let old = vec_map.append_or_update_last(lsn, off).unwrap().0; - if old.is_some() { - // We already had an entry for this LSN. That's odd.. - warn!( - "Page version of rel {} blk {} at {} already exists", - self.seg.rel, blknum, lsn - ); - } - } - - // Also update the relation size, if this extended the relation. - if self.seg.rel.is_blocky() { - let newsize = blknum + 1; - - // use inner get_seg_size, since calling self.get_seg_size will try to acquire the lock, - // which we've just acquired above - let oldsize = inner.get_seg_size(lsn); - if newsize > oldsize { - trace!( - "enlarging segment {} from {} to {} blocks at {}", - self.seg, - oldsize, - newsize, - lsn - ); - - // If we are extending the relation by more than one page, initialize the "gap" - // with zeros - // - // XXX: What if the caller initializes the gap with subsequent call with same LSN? - // I don't think that can happen currently, but that is highly dependent on how - // PostgreSQL writes its WAL records and there's no guarantee of it. If it does - // happen, we would hit the "page version already exists" warning above on the - // subsequent call to initialize the gap page. - for gapblknum in oldsize..blknum { - let zeropv = PageVersion::Page(ZERO_PAGE.clone()); - trace!( - "filling gap blk {} with zeros for write of {}", - gapblknum, - blknum - ); - - // Write the page version to the file, and remember its offset in - // 'page_versions' - { - let off = inner.write_pv(&zeropv)?; - let vec_map = inner.page_versions.entry(gapblknum).or_default(); - let old = vec_map.append_or_update_last(lsn, off).unwrap().0; - if old.is_some() { - warn!( - "Page version of seg {} blk {} at {} already exists", - self.seg, gapblknum, lsn - ); - } - } - } - - inner.seg_sizes.append_or_update_last(lsn, newsize).unwrap(); - return Ok(newsize - oldsize); - } - } - - Ok(0) - } - - /// Remember that the relation was truncated at given LSN - pub fn put_truncation(&self, lsn: Lsn, new_size: SegmentBlk) { - assert!( - self.seg.rel.is_blocky(), - "put_truncation() called on a non-blocky rel" - ); - - let mut inner = self.inner.write().unwrap(); - inner.assert_writeable(); - - // check that this we truncate to a smaller size than segment was before the truncation - let old_size = inner.get_seg_size(lsn); - assert!(new_size < old_size); - - let (old, _delta_size) = inner - .seg_sizes - .append_or_update_last(lsn, new_size) - .unwrap(); + let off = inner.end_offset; + let buf = Value::ser(&val)?; + let len = buf.len(); + inner.file.write_all(&buf)?; + inner.end_offset += len as u64; + let vec_map = inner.index.entry(key).or_default(); + let blob_ref = BlobRef::new(off, len, val.will_init()); + let old = vec_map.append_or_update_last(lsn, blob_ref).unwrap().0; if old.is_some() { // We already had an entry for this LSN. That's odd.. - warn!("Inserting truncation, but had an entry for the LSN already"); - } - } - - /// Remember that the segment was dropped at given LSN - pub fn drop_segment(&self, lsn: Lsn) { - let mut inner = self.inner.write().unwrap(); - - assert!(inner.end_lsn.is_none()); - assert!(!inner.dropped); - inner.dropped = true; - assert!(self.start_lsn < lsn); - inner.end_lsn = Some(lsn); - - trace!("dropped segment {} at {}", self.seg, lsn); - } - - /// - /// Initialize a new InMemoryLayer for, by copying the state at the given - /// point in time from given existing layer. - /// - pub fn create_successor_layer( - conf: &'static PageServerConf, - src: Arc, - timelineid: ZTimelineId, - tenantid: ZTenantId, - start_lsn: Lsn, - oldest_lsn: Lsn, - ) -> Result { - let seg = src.get_seg_tag(); - - assert!(oldest_lsn.is_aligned()); - - trace!( - "initializing new InMemoryLayer for writing {} on timeline {} at {}", - seg, - timelineid, - start_lsn, - ); - - // Copy the segment size at the start LSN from the predecessor layer. - let mut seg_sizes = VecMap::default(); - if seg.rel.is_blocky() { - let size = src.get_seg_size(start_lsn)?; - seg_sizes.append(start_lsn, size).unwrap(); + warn!("Key {} at {} already exists", key, lsn); } - let file = EphemeralFile::create(conf, tenantid, timelineid)?; - - Ok(InMemoryLayer { - conf, - timelineid, - tenantid, - seg, - start_lsn, - oldest_lsn, - incremental: true, - inner: RwLock::new(InMemoryLayerInner { - end_lsn: None, - dropped: false, - file, - page_versions: HashMap::new(), - seg_sizes, - latest_lsn: oldest_lsn, - }), - }) + Ok(()) } - pub fn is_writeable(&self) -> bool { - let inner = self.inner.read().unwrap(); - inner.end_lsn.is_none() + pub fn put_tombstone(&self, _key_range: Range, _lsn: Lsn) -> Result<()> { + // TODO: Currently, we just leak the storage for any deleted keys + + Ok(()) } /// Make the layer non-writeable. Only call once. /// Records the end_lsn for non-dropped layers. - /// `end_lsn` is inclusive + /// `end_lsn` is exclusive pub fn freeze(&self, end_lsn: Lsn) { let mut inner = self.inner.write().unwrap(); - if inner.end_lsn.is_some() { - assert!(inner.dropped); - } else { - assert!(!inner.dropped); - assert!(self.start_lsn < end_lsn + 1); - inner.end_lsn = Some(Lsn(end_lsn.0 + 1)); + assert!(self.start_lsn < end_lsn); + inner.end_lsn = Some(end_lsn); - if let Some((lsn, _)) = inner.seg_sizes.as_slice().last() { - assert!(lsn <= &end_lsn, "{:?} {:?}", lsn, end_lsn); - } - - for (_blk, vec_map) in inner.page_versions.iter() { - for (lsn, _pos) in vec_map.as_slice() { - assert!(*lsn <= end_lsn); - } + for vec_map in inner.index.values() { + for (lsn, _pos) in vec_map.as_slice() { + assert!(*lsn < end_lsn); } } } - /// Write the this frozen in-memory layer to disk. + /// Write this frozen in-memory layer to disk. /// - /// Returns new layers that replace this one. - /// If not dropped and reconstruct_pages is true, returns a new image layer containing the page versions - /// at the `end_lsn`. Can also return a DeltaLayer that includes all the - /// WAL records between start and end LSN. (The delta layer is not needed - /// when a new relish is created with a single LSN, so that the start and - /// end LSN are the same.) - pub fn write_to_disk( - &self, - timeline: &LayeredTimeline, - reconstruct_pages: bool, - ) -> Result { - trace!( - "write_to_disk {} get_end_lsn is {}", - self.filename().display(), - self.get_end_lsn() - ); - + /// Returns a new delta layer with all the same data as this in-memory layer + pub fn write_to_disk(&self) -> Result { // Grab the lock in read-mode. We hold it over the I/O, but because this // layer is not writeable anymore, no one should be trying to acquire the // write lock on it, so we shouldn't block anyone. There's one exception @@ -705,105 +333,32 @@ impl InMemoryLayer { // rare though, so we just accept the potential latency hit for now. let inner = self.inner.read().unwrap(); - // Since `end_lsn` is exclusive, subtract 1 to calculate the last LSN - // that is included. - let end_lsn_exclusive = inner.end_lsn.unwrap(); - let end_lsn_inclusive = Lsn(end_lsn_exclusive.0 - 1); + let mut delta_layer_writer = DeltaLayerWriter::new( + self.conf, + self.timelineid, + self.tenantid, + Key::MIN, + self.start_lsn..inner.end_lsn.unwrap(), + )?; - // Figure out if we should create a delta layer, image layer, or both. - let image_lsn: Option; - let delta_end_lsn: Option; - if self.is_dropped() || !reconstruct_pages { - // The segment was dropped. Create just a delta layer containing all the - // changes up to and including the drop. - delta_end_lsn = Some(end_lsn_exclusive); - image_lsn = None; - } else if self.start_lsn == end_lsn_inclusive { - // The layer contains exactly one LSN. It's enough to write an image - // layer at that LSN. - delta_end_lsn = None; - image_lsn = Some(end_lsn_inclusive); - } else { - // Create a delta layer with all the changes up to the end LSN, - // and an image layer at the end LSN. - // - // Note that we the delta layer does *not* include the page versions - // at the end LSN. They are included in the image layer, and there's - // no need to store them twice. - delta_end_lsn = Some(end_lsn_inclusive); - image_lsn = Some(end_lsn_inclusive); - } - - let mut delta_layers = Vec::new(); - let mut image_layers = Vec::new(); - - if let Some(delta_end_lsn) = delta_end_lsn { - let mut delta_layer_writer = DeltaLayerWriter::new( - self.conf, - self.timelineid, - self.tenantid, - self.seg, - self.start_lsn, - delta_end_lsn, - self.is_dropped(), - )?; - - // Write all page versions, in block + LSN order - let mut buf: Vec = Vec::new(); - - let pv_iter = inner.page_versions.iter(); - let mut pages: Vec<(&SegmentBlk, &VecMap)> = pv_iter.collect(); - pages.sort_by_key(|(blknum, _vec_map)| *blknum); - for (blknum, vec_map) in pages { - for (lsn, pos) in vec_map.as_slice() { - if *lsn < delta_end_lsn { - let len = inner.read_pv_bytes(*pos, &mut buf)?; - delta_layer_writer.put_page_version(*blknum, *lsn, &buf[..len])?; - } + let mut do_steps = || -> Result<()> { + for (key, vec_map) in inner.index.iter() { + // Write all page versions + for (lsn, blob_ref) in vec_map.as_slice() { + let mut buf = vec![0u8; blob_ref.size()]; + inner.file.read_exact_at(&mut buf, blob_ref.pos())?; + let val = Value::des(&buf)?; + delta_layer_writer.put_value(*key, *lsn, val)?; } } - - // Create seg_sizes - let seg_sizes = if delta_end_lsn == end_lsn_exclusive { - inner.seg_sizes.clone() - } else { - inner.seg_sizes.split_at(&end_lsn_exclusive).0 - }; - - let delta_layer = delta_layer_writer.finish(seg_sizes)?; - delta_layers.push(delta_layer); + Ok(()) + }; + if let Err(err) = do_steps() { + delta_layer_writer.abort(); + return Err(err); } - drop(inner); - - // Write a new base image layer at the cutoff point - if let Some(image_lsn) = image_lsn { - let size = if self.seg.rel.is_blocky() { - self.get_seg_size(image_lsn)? - } else { - 1 - }; - let mut image_layer_writer = ImageLayerWriter::new( - self.conf, - self.timelineid, - self.tenantid, - self.seg, - image_lsn, - size, - )?; - - for blknum in 0..size { - let img = timeline.materialize_page(self.seg, blknum, image_lsn, &*self)?; - - image_layer_writer.put_page_image(&img)?; - } - let image_layer = image_layer_writer.finish()?; - image_layers.push(image_layer); - } - - Ok(LayersOnDisk { - delta_layers, - image_layers, - }) + let delta_layer = delta_layer_writer.finish(Key::MAX)?; + Ok(delta_layer) } } diff --git a/pageserver/src/layered_repository/interval_tree.rs b/pageserver/src/layered_repository/interval_tree.rs deleted file mode 100644 index 978ecd837e..0000000000 --- a/pageserver/src/layered_repository/interval_tree.rs +++ /dev/null @@ -1,468 +0,0 @@ -/// -/// IntervalTree is data structure for holding intervals. It is generic -/// to make unit testing possible, but the only real user of it is the layer map, -/// -/// It's inspired by the "segment tree" or a "statistic tree" as described in -/// https://en.wikipedia.org/wiki/Segment_tree. However, we use a B-tree to hold -/// the points instead of a binary tree. This is called an "interval tree" instead -/// of "segment tree" because the term "segment" is already using Zenith to mean -/// something else. To add to the confusion, there is another data structure known -/// as "interval tree" out there (see https://en.wikipedia.org/wiki/Interval_tree), -/// for storing intervals, but this isn't that. -/// -/// The basic idea is to have a B-tree of "interesting Points". At each Point, -/// there is a list of intervals that contain the point. The Points are formed -/// from the start bounds of each interval; there is a Point for each distinct -/// start bound. -/// -/// Operations: -/// -/// To find intervals that contain a given point, you search the b-tree to find -/// the nearest Point <= search key. Then you just return the list of intervals. -/// -/// To insert an interval, find the Point with start key equal to the inserted item. -/// If the Point doesn't exist yet, create it, by copying all the items from the -/// previous Point that cover the new Point. Then walk right, inserting the new -/// interval to all the Points that are contained by the new interval (including the -/// newly created Point). -/// -/// To remove an interval, you scan the tree for all the Points that are contained by -/// the removed interval, and remove it from the list in each Point. -/// -/// Requirements and assumptions: -/// -/// - Can store overlapping items -/// - But there are not many overlapping items -/// - The interval bounds don't change after it is added to the tree -/// - Intervals are uniquely identified by pointer equality. You must not be insert the -/// same interval object twice, and `remove` uses pointer equality to remove the right -/// interval. It is OK to have two intervals with the same bounds, however. -/// -use std::collections::BTreeMap; -use std::fmt::Debug; -use std::ops::Range; -use std::sync::Arc; - -pub struct IntervalTree -where - I: IntervalItem, -{ - points: BTreeMap>, -} - -struct Point { - /// All intervals that contain this point, in no particular order. - /// - /// We assume that there aren't a lot of overlappingg intervals, so that this vector - /// never grows very large. If that assumption doesn't hold, we could keep this ordered - /// by the end bound, to speed up `search`. But as long as there are only a few elements, - /// a linear search is OK. - elements: Vec>, -} - -/// Abstraction for an interval that can be stored in the tree -/// -/// The start bound is inclusive and the end bound is exclusive. End must be greater -/// than start. -pub trait IntervalItem { - type Key: Ord + Copy + Debug + Sized; - - fn start_key(&self) -> Self::Key; - fn end_key(&self) -> Self::Key; - - fn bounds(&self) -> Range { - self.start_key()..self.end_key() - } -} - -impl IntervalTree -where - I: IntervalItem, -{ - /// Return an element that contains 'key', or precedes it. - /// - /// If there are multiple candidates, returns the one with the highest 'end' key. - pub fn search(&self, key: I::Key) -> Option> { - // Find the greatest point that precedes or is equal to the search key. If there is - // none, returns None. - let (_, p) = self.points.range(..=key).next_back()?; - - // Find the element with the highest end key at this point - let highest_item = p - .elements - .iter() - .reduce(|a, b| { - // starting with Rust 1.53, could use `std::cmp::min_by_key` here - if a.end_key() > b.end_key() { - a - } else { - b - } - }) - .unwrap(); - Some(Arc::clone(highest_item)) - } - - /// Iterate over all items with start bound >= 'key' - pub fn iter_newer(&self, key: I::Key) -> IntervalIter { - IntervalIter { - point_iter: self.points.range(key..), - elem_iter: None, - } - } - - /// Iterate over all items - pub fn iter(&self) -> IntervalIter { - IntervalIter { - point_iter: self.points.range(..), - elem_iter: None, - } - } - - pub fn insert(&mut self, item: Arc) { - let start_key = item.start_key(); - let end_key = item.end_key(); - assert!(start_key < end_key); - let bounds = start_key..end_key; - - // Find the starting point and walk forward from there - let mut found_start_point = false; - let iter = self.points.range_mut(bounds); - for (point_key, point) in iter { - if *point_key == start_key { - found_start_point = true; - // It is an error to insert the same item to the tree twice. - assert!( - !point.elements.iter().any(|x| Arc::ptr_eq(x, &item)), - "interval is already in the tree" - ); - } - point.elements.push(Arc::clone(&item)); - } - if !found_start_point { - // Create a new Point for the starting point - - // Look at the previous point, and copy over elements that overlap with this - // new point - let mut new_elements: Vec> = Vec::new(); - if let Some((_, prev_point)) = self.points.range(..start_key).next_back() { - let overlapping_prev_elements = prev_point - .elements - .iter() - .filter(|x| x.bounds().contains(&start_key)) - .cloned(); - - new_elements.extend(overlapping_prev_elements); - } - new_elements.push(item); - - let new_point = Point { - elements: new_elements, - }; - self.points.insert(start_key, new_point); - } - } - - pub fn remove(&mut self, item: &Arc) { - // range search points - let start_key = item.start_key(); - let end_key = item.end_key(); - let bounds = start_key..end_key; - - let mut points_to_remove: Vec = Vec::new(); - let mut found_start_point = false; - for (point_key, point) in self.points.range_mut(bounds) { - if *point_key == start_key { - found_start_point = true; - } - let len_before = point.elements.len(); - point.elements.retain(|other| !Arc::ptr_eq(other, item)); - let len_after = point.elements.len(); - assert_eq!(len_after + 1, len_before); - if len_after == 0 { - points_to_remove.push(*point_key); - } - } - assert!(found_start_point); - - for k in points_to_remove { - self.points.remove(&k).unwrap(); - } - } -} - -pub struct IntervalIter<'a, I: ?Sized> -where - I: IntervalItem, -{ - point_iter: std::collections::btree_map::Range<'a, I::Key, Point>, - elem_iter: Option<(I::Key, std::slice::Iter<'a, Arc>)>, -} - -impl<'a, I> Iterator for IntervalIter<'a, I> -where - I: IntervalItem + ?Sized, -{ - type Item = Arc; - - fn next(&mut self) -> Option { - // Iterate over all elements in all the points in 'point_iter'. To avoid - // returning the same element twice, we only return each element at its - // starting point. - loop { - // Return next remaining element from the current point - if let Some((point_key, elem_iter)) = &mut self.elem_iter { - for elem in elem_iter { - if elem.start_key() == *point_key { - return Some(Arc::clone(elem)); - } - } - } - // No more elements at this point. Move to next point. - if let Some((point_key, point)) = self.point_iter.next() { - self.elem_iter = Some((*point_key, point.elements.iter())); - continue; - } else { - // No more points, all done - return None; - } - } - } -} - -impl Default for IntervalTree -where - I: IntervalItem, -{ - fn default() -> Self { - IntervalTree { - points: BTreeMap::new(), - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - use std::fmt; - - #[derive(Debug)] - struct MockItem { - start_key: u32, - end_key: u32, - val: String, - } - impl IntervalItem for MockItem { - type Key = u32; - - fn start_key(&self) -> u32 { - self.start_key - } - fn end_key(&self) -> u32 { - self.end_key - } - } - impl MockItem { - fn new(start_key: u32, end_key: u32) -> Self { - MockItem { - start_key, - end_key, - val: format!("{}-{}", start_key, end_key), - } - } - fn new_str(start_key: u32, end_key: u32, val: &str) -> Self { - MockItem { - start_key, - end_key, - val: format!("{}-{}: {}", start_key, end_key, val), - } - } - } - impl fmt::Display for MockItem { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "{}", self.val) - } - } - #[rustfmt::skip] - fn assert_search( - tree: &IntervalTree, - key: u32, - expected: &[&str], - ) -> Option> { - if let Some(v) = tree.search(key) { - let vstr = v.to_string(); - - assert!(!expected.is_empty(), "search with {} returned {}, expected None", key, v); - assert!( - expected.contains(&vstr.as_str()), - "search with {} returned {}, expected one of: {:?}", - key, v, expected, - ); - - Some(v) - } else { - assert!( - expected.is_empty(), - "search with {} returned None, expected one of {:?}", - key, expected - ); - None - } - } - - fn assert_contents(tree: &IntervalTree, expected: &[&str]) { - let mut contents: Vec = tree.iter().map(|e| e.to_string()).collect(); - contents.sort(); - assert_eq!(contents, expected); - } - - fn dump_tree(tree: &IntervalTree) { - for (point_key, point) in tree.points.iter() { - print!("{}:", point_key); - for e in point.elements.iter() { - print!(" {}", e); - } - println!(); - } - } - - #[test] - fn test_interval_tree_simple() { - let mut tree: IntervalTree = IntervalTree::default(); - - // Simple, non-overlapping ranges. - tree.insert(Arc::new(MockItem::new(10, 11))); - tree.insert(Arc::new(MockItem::new(11, 12))); - tree.insert(Arc::new(MockItem::new(12, 13))); - tree.insert(Arc::new(MockItem::new(18, 19))); - tree.insert(Arc::new(MockItem::new(17, 18))); - tree.insert(Arc::new(MockItem::new(15, 16))); - - assert_search(&tree, 9, &[]); - assert_search(&tree, 10, &["10-11"]); - assert_search(&tree, 11, &["11-12"]); - assert_search(&tree, 12, &["12-13"]); - assert_search(&tree, 13, &["12-13"]); - assert_search(&tree, 14, &["12-13"]); - assert_search(&tree, 15, &["15-16"]); - assert_search(&tree, 16, &["15-16"]); - assert_search(&tree, 17, &["17-18"]); - assert_search(&tree, 18, &["18-19"]); - assert_search(&tree, 19, &["18-19"]); - assert_search(&tree, 20, &["18-19"]); - - // remove a few entries and search around them again - tree.remove(&assert_search(&tree, 10, &["10-11"]).unwrap()); // first entry - tree.remove(&assert_search(&tree, 12, &["12-13"]).unwrap()); // entry in the middle - tree.remove(&assert_search(&tree, 18, &["18-19"]).unwrap()); // last entry - assert_search(&tree, 9, &[]); - assert_search(&tree, 10, &[]); - assert_search(&tree, 11, &["11-12"]); - assert_search(&tree, 12, &["11-12"]); - assert_search(&tree, 14, &["11-12"]); - assert_search(&tree, 15, &["15-16"]); - assert_search(&tree, 17, &["17-18"]); - assert_search(&tree, 18, &["17-18"]); - } - - #[test] - fn test_interval_tree_overlap() { - let mut tree: IntervalTree = IntervalTree::default(); - - // Overlapping items - tree.insert(Arc::new(MockItem::new(22, 24))); - tree.insert(Arc::new(MockItem::new(23, 25))); - let x24_26 = Arc::new(MockItem::new(24, 26)); - tree.insert(Arc::clone(&x24_26)); - let x26_28 = Arc::new(MockItem::new(26, 28)); - tree.insert(Arc::clone(&x26_28)); - tree.insert(Arc::new(MockItem::new(25, 27))); - - assert_search(&tree, 22, &["22-24"]); - assert_search(&tree, 23, &["22-24", "23-25"]); - assert_search(&tree, 24, &["23-25", "24-26"]); - assert_search(&tree, 25, &["24-26", "25-27"]); - assert_search(&tree, 26, &["25-27", "26-28"]); - assert_search(&tree, 27, &["26-28"]); - assert_search(&tree, 28, &["26-28"]); - assert_search(&tree, 29, &["26-28"]); - - tree.remove(&x24_26); - tree.remove(&x26_28); - assert_search(&tree, 23, &["22-24", "23-25"]); - assert_search(&tree, 24, &["23-25"]); - assert_search(&tree, 25, &["25-27"]); - assert_search(&tree, 26, &["25-27"]); - assert_search(&tree, 27, &["25-27"]); - assert_search(&tree, 28, &["25-27"]); - assert_search(&tree, 29, &["25-27"]); - } - - #[test] - fn test_interval_tree_nested() { - let mut tree: IntervalTree = IntervalTree::default(); - - // Items containing other items - tree.insert(Arc::new(MockItem::new(31, 39))); - tree.insert(Arc::new(MockItem::new(32, 34))); - tree.insert(Arc::new(MockItem::new(33, 35))); - tree.insert(Arc::new(MockItem::new(30, 40))); - - assert_search(&tree, 30, &["30-40"]); - assert_search(&tree, 31, &["30-40", "31-39"]); - assert_search(&tree, 32, &["30-40", "32-34", "31-39"]); - assert_search(&tree, 33, &["30-40", "32-34", "33-35", "31-39"]); - assert_search(&tree, 34, &["30-40", "33-35", "31-39"]); - assert_search(&tree, 35, &["30-40", "31-39"]); - assert_search(&tree, 36, &["30-40", "31-39"]); - assert_search(&tree, 37, &["30-40", "31-39"]); - assert_search(&tree, 38, &["30-40", "31-39"]); - assert_search(&tree, 39, &["30-40"]); - assert_search(&tree, 40, &["30-40"]); - assert_search(&tree, 41, &["30-40"]); - } - - #[test] - fn test_interval_tree_duplicates() { - let mut tree: IntervalTree = IntervalTree::default(); - - // Duplicate keys - let item_a = Arc::new(MockItem::new_str(55, 56, "a")); - tree.insert(Arc::clone(&item_a)); - let item_b = Arc::new(MockItem::new_str(55, 56, "b")); - tree.insert(Arc::clone(&item_b)); - let item_c = Arc::new(MockItem::new_str(55, 56, "c")); - tree.insert(Arc::clone(&item_c)); - let item_d = Arc::new(MockItem::new_str(54, 56, "d")); - tree.insert(Arc::clone(&item_d)); - let item_e = Arc::new(MockItem::new_str(55, 57, "e")); - tree.insert(Arc::clone(&item_e)); - - dump_tree(&tree); - - assert_search( - &tree, - 55, - &["55-56: a", "55-56: b", "55-56: c", "54-56: d", "55-57: e"], - ); - tree.remove(&item_b); - dump_tree(&tree); - - assert_contents(&tree, &["54-56: d", "55-56: a", "55-56: c", "55-57: e"]); - - tree.remove(&item_d); - dump_tree(&tree); - assert_contents(&tree, &["55-56: a", "55-56: c", "55-57: e"]); - } - - #[test] - #[should_panic] - fn test_interval_tree_insert_twice() { - let mut tree: IntervalTree = IntervalTree::default(); - - // Inserting the same item twice is not cool - let item = Arc::new(MockItem::new(1, 2)); - tree.insert(Arc::clone(&item)); - tree.insert(Arc::clone(&item)); // fails assertion - } -} diff --git a/pageserver/src/layered_repository/layer_map.rs b/pageserver/src/layered_repository/layer_map.rs index fe82fd491c..c4929a6173 100644 --- a/pageserver/src/layered_repository/layer_map.rs +++ b/pageserver/src/layered_repository/layer_map.rs @@ -1,32 +1,29 @@ //! -//! The layer map tracks what layers exist for all the relishes in a timeline. +//! The layer map tracks what layers exist in a timeline. //! //! When the timeline is first accessed, the server lists of all layer files //! in the timelines/ directory, and populates this map with -//! ImageLayer and DeltaLayer structs corresponding to each file. When new WAL -//! is received, we create InMemoryLayers to hold the incoming records. Now and -//! then, in the checkpoint() function, the in-memory layers are frozen, forming -//! new image and delta layers and corresponding files are written to disk. +//! ImageLayer and DeltaLayer structs corresponding to each file. When the first +//! new WAL record is received, we create an InMemoryLayer to hold the incoming +//! records. Now and then, in the checkpoint() function, the in-memory layer is +//! are frozen, and it is split up into new image and delta layers and the +//! corresponding files are written to disk. //! -use crate::layered_repository::interval_tree::{IntervalItem, IntervalIter, IntervalTree}; -use crate::layered_repository::storage_layer::{Layer, SegmentTag}; +use crate::layered_repository::storage_layer::Layer; +use crate::layered_repository::storage_layer::{range_eq, range_overlaps}; use crate::layered_repository::InMemoryLayer; -use crate::relish::*; +use crate::repository::Key; use anyhow::Result; use lazy_static::lazy_static; -use std::cmp::Ordering; -use std::collections::{BinaryHeap, HashMap}; +use std::collections::VecDeque; +use std::ops::Range; use std::sync::Arc; +use tracing::*; use zenith_metrics::{register_int_gauge, IntGauge}; use zenith_utils::lsn::Lsn; -use super::global_layer_map::{LayerId, GLOBAL_LAYER_MAP}; - lazy_static! { - static ref NUM_INMEMORY_LAYERS: IntGauge = - register_int_gauge!("pageserver_inmemory_layers", "Number of layers in memory") - .expect("failed to define a metric"); static ref NUM_ONDISK_LAYERS: IntGauge = register_int_gauge!("pageserver_ondisk_layers", "Number of layers on-disk") .expect("failed to define a metric"); @@ -37,98 +34,147 @@ lazy_static! { /// #[derive(Default)] pub struct LayerMap { - /// All the layers keyed by segment tag - segs: HashMap, + // + // 'open_layer' holds the current InMemoryLayer that is accepting new + // records. If it is None, 'next_open_layer_at' will be set instead, indicating + // where the start LSN of the next InMemoryLayer that is to be created. + // + pub open_layer: Option>, + pub next_open_layer_at: Option, - /// All in-memory layers, ordered by 'oldest_lsn' and generation - /// of each layer. This allows easy access to the in-memory layer that - /// contains the oldest WAL record. - open_layers: BinaryHeap, + /// + /// The frozen layer, if any, contains WAL older than the current 'open_layer' + /// or 'next_open_layer_at', but newer than any historic layer. The frozen + /// layer is during checkpointing, when an InMemoryLayer is being written out + /// to disk. + /// + pub frozen_layers: VecDeque>, - /// Generation number, used to distinguish newly inserted entries in the - /// binary heap from older entries during checkpoint. - current_generation: u64, + /// All the historic layers are kept here + + /// TODO: This is a placeholder implementation of a data structure + /// to hold information about all the layer files on disk and in + /// S3. Currently, it's just a vector and all operations perform a + /// linear scan over it. That obviously becomes slow as the + /// number of layers grows. I'm imagining that an R-tree or some + /// other 2D data structure would be the long-term solution here. + historic_layers: Vec>, +} + +/// Return value of LayerMap::search +pub struct SearchResult { + pub layer: Arc, + pub lsn_floor: Lsn, } impl LayerMap { /// - /// Look up a layer using the given segment tag and LSN. This differs from a - /// plain key-value lookup in that if there is any layer that covers the - /// given LSN, or precedes the given LSN, it is returned. In other words, - /// you don't need to know the exact start LSN of the layer. + /// Find the latest layer that covers the given 'key', with lsn < + /// 'end_lsn'. /// - pub fn get(&self, tag: &SegmentTag, lsn: Lsn) -> Option> { - let segentry = self.segs.get(tag)?; - - segentry.get(lsn) - } - + /// Returns the layer, if any, and an 'lsn_floor' value that + /// indicates which portion of the layer the caller should + /// check. 'lsn_floor' is normally the start-LSN of the layer, but + /// can be greater if there is an overlapping layer that might + /// contain the version, even if it's missing from the returned + /// layer. /// - /// Get the open layer for given segment for writing. Or None if no open - /// layer exists. - /// - pub fn get_open(&self, tag: &SegmentTag) -> Option> { - let segentry = self.segs.get(tag)?; + pub fn search(&self, key: Key, end_lsn: Lsn) -> Result> { + // linear search + // Find the latest image layer that covers the given key + let mut latest_img: Option> = None; + let mut latest_img_lsn: Option = None; + for l in self.historic_layers.iter() { + if l.is_incremental() { + continue; + } + if !l.get_key_range().contains(&key) { + continue; + } + let img_lsn = l.get_lsn_range().start; - segentry - .open_layer_id - .and_then(|layer_id| GLOBAL_LAYER_MAP.read().unwrap().get(&layer_id)) - } + if img_lsn >= end_lsn { + // too new + continue; + } + if Lsn(img_lsn.0 + 1) == end_lsn { + // found exact match + return Ok(Some(SearchResult { + layer: Arc::clone(l), + lsn_floor: img_lsn, + })); + } + if img_lsn > latest_img_lsn.unwrap_or(Lsn(0)) { + latest_img = Some(Arc::clone(l)); + latest_img_lsn = Some(img_lsn); + } + } - /// - /// Insert an open in-memory layer - /// - pub fn insert_open(&mut self, layer: Arc) { - let segentry = self.segs.entry(layer.get_seg_tag()).or_default(); - - let layer_id = segentry.update_open(Arc::clone(&layer)); - - let oldest_lsn = layer.get_oldest_lsn(); - - // After a crash and restart, 'oldest_lsn' of the oldest in-memory - // layer becomes the WAL streaming starting point, so it better not point - // in the middle of a WAL record. - assert!(oldest_lsn.is_aligned()); - - // Also add it to the binary heap - let open_layer_entry = OpenLayerEntry { - oldest_lsn: layer.get_oldest_lsn(), - layer_id, - generation: self.current_generation, - }; - self.open_layers.push(open_layer_entry); - - NUM_INMEMORY_LAYERS.inc(); - } - - /// Remove an open in-memory layer - pub fn remove_open(&mut self, layer_id: LayerId) { - // Note: we don't try to remove the entry from the binary heap. - // It will be removed lazily by peek_oldest_open() when it's made it to - // the top of the heap. - - let layer_opt = { - let mut global_map = GLOBAL_LAYER_MAP.write().unwrap(); - let layer_opt = global_map.get(&layer_id); - global_map.remove(&layer_id); - // TODO it's bad that a ref can still exist after being evicted from cache - layer_opt - }; - - if let Some(layer) = layer_opt { - let mut segentry = self.segs.get_mut(&layer.get_seg_tag()).unwrap(); - - if segentry.open_layer_id == Some(layer_id) { - // Also remove it from the SegEntry of this segment - segentry.open_layer_id = None; - } else { - // We could have already updated segentry.open for - // dropped (non-writeable) layer. This is fine. - assert!(!layer.is_writeable()); - assert!(layer.is_dropped()); + // Search the delta layers + let mut latest_delta: Option> = None; + for l in self.historic_layers.iter() { + if !l.is_incremental() { + continue; + } + if !l.get_key_range().contains(&key) { + continue; } - NUM_INMEMORY_LAYERS.dec(); + if l.get_lsn_range().start >= end_lsn { + // too new + continue; + } + + if l.get_lsn_range().end >= end_lsn { + // this layer contains the requested point in the key/lsn space. + // No need to search any further + trace!( + "found layer {} for request on {} at {}", + l.filename().display(), + key, + end_lsn + ); + latest_delta.replace(Arc::clone(l)); + break; + } + // this layer's end LSN is smaller than the requested point. If there's + // nothing newer, this is what we need to return. Remember this. + if let Some(ref old_candidate) = latest_delta { + if l.get_lsn_range().end > old_candidate.get_lsn_range().end { + latest_delta.replace(Arc::clone(l)); + } + } else { + latest_delta.replace(Arc::clone(l)); + } + } + if let Some(l) = latest_delta { + trace!( + "found (old) layer {} for request on {} at {}", + l.filename().display(), + key, + end_lsn + ); + let lsn_floor = std::cmp::max( + Lsn(latest_img_lsn.unwrap_or(Lsn(0)).0 + 1), + l.get_lsn_range().start, + ); + Ok(Some(SearchResult { + lsn_floor, + layer: l, + })) + } else if let Some(l) = latest_img { + trace!( + "found img layer and no deltas for request on {} at {}", + key, + end_lsn + ); + Ok(Some(SearchResult { + lsn_floor: latest_img_lsn.unwrap(), + layer: l, + })) + } else { + trace!("no layer found for request on {} at {}", key, end_lsn); + Ok(None) } } @@ -136,9 +182,7 @@ impl LayerMap { /// Insert an on-disk layer /// pub fn insert_historic(&mut self, layer: Arc) { - let segentry = self.segs.entry(layer.get_seg_tag()).or_default(); - segentry.insert_historic(layer); - + self.historic_layers.push(layer); NUM_ONDISK_LAYERS.inc(); } @@ -147,61 +191,62 @@ impl LayerMap { /// /// This should be called when the corresponding file on disk has been deleted. /// + #[allow(dead_code)] pub fn remove_historic(&mut self, layer: Arc) { - let tag = layer.get_seg_tag(); + let len_before = self.historic_layers.len(); - if let Some(segentry) = self.segs.get_mut(&tag) { - segentry.historic.remove(&layer); - } + // FIXME: ptr_eq might fail to return true for 'dyn' + // references. Clippy complains about this. In practice it + // seems to work, the assertion below would be triggered + // otherwise but this ought to be fixed. + #[allow(clippy::vtable_address_comparisons)] + self.historic_layers + .retain(|other| !Arc::ptr_eq(other, &layer)); + + assert_eq!(self.historic_layers.len(), len_before - 1); NUM_ONDISK_LAYERS.dec(); } - // List relations along with a flag that marks if they exist at the given lsn. - // spcnode 0 and dbnode 0 have special meanings and mean all tabespaces/databases. - // Pass Tag if we're only interested in some relations. - pub fn list_relishes(&self, tag: Option, lsn: Lsn) -> Result> { - let mut rels: HashMap = HashMap::new(); - - for (seg, segentry) in self.segs.iter() { - match seg.rel { - RelishTag::Relation(reltag) => { - if let Some(request_rel) = tag { - if (request_rel.spcnode == 0 || reltag.spcnode == request_rel.spcnode) - && (request_rel.dbnode == 0 || reltag.dbnode == request_rel.dbnode) - { - if let Some(exists) = segentry.exists_at_lsn(lsn)? { - rels.insert(seg.rel, exists); - } - } - } - } - _ => { - if tag == None { - if let Some(exists) = segentry.exists_at_lsn(lsn)? { - rels.insert(seg.rel, exists); - } - } - } - } - } - Ok(rels) - } - /// Is there a newer image layer for given segment? /// /// This is used for garbage collection, to determine if an old layer can /// be deleted. /// We ignore segments newer than disk_consistent_lsn because they will be removed at restart + /// We also only look at historic layers + //#[allow(dead_code)] pub fn newer_image_layer_exists( &self, - seg: SegmentTag, + key_range: &Range, lsn: Lsn, disk_consistent_lsn: Lsn, - ) -> bool { - if let Some(segentry) = self.segs.get(&seg) { - segentry.newer_image_layer_exists(lsn, disk_consistent_lsn) - } else { - false + ) -> Result { + let mut range_remain = key_range.clone(); + + loop { + let mut made_progress = false; + for l in self.historic_layers.iter() { + if l.is_incremental() { + continue; + } + let img_lsn = l.get_lsn_range().start; + if !l.is_incremental() + && l.get_key_range().contains(&range_remain.start) + && img_lsn > lsn + && img_lsn < disk_consistent_lsn + { + made_progress = true; + let img_key_end = l.get_key_range().end; + + if img_key_end >= range_remain.end { + return Ok(true); + } + range_remain.start = img_key_end; + } + } + + if !made_progress { + return Ok(false); + } } } @@ -211,284 +256,148 @@ impl LayerMap { /// used for garbage collection, to determine if some alive layer /// exists at the lsn. If so, we shouldn't delete a newer dropped layer /// to avoid incorrectly making it visible. - pub fn layer_exists_at_lsn(&self, seg: SegmentTag, lsn: Lsn) -> Result { - Ok(if let Some(segentry) = self.segs.get(&seg) { - segentry.exists_at_lsn(lsn)?.unwrap_or(false) - } else { - false - }) + /* + pub fn layer_exists_at_lsn(&self, seg: SegmentTag, lsn: Lsn) -> Result { + Ok(if let Some(segentry) = self.historic_layers.get(&seg) { + segentry.exists_at_lsn(seg, lsn)?.unwrap_or(false) + } else { + false + }) + } + */ + + pub fn iter_historic_layers(&self) -> std::slice::Iter> { + self.historic_layers.iter() } - /// Return the oldest in-memory layer, along with its generation number. - pub fn peek_oldest_open(&mut self) -> Option<(LayerId, Arc, u64)> { - let global_map = GLOBAL_LAYER_MAP.read().unwrap(); + /// Find the last image layer that covers 'key', ignoring any image layers + /// newer than 'lsn'. + fn find_latest_image(&self, key: Key, lsn: Lsn) -> Option> { + let mut candidate_lsn = Lsn(0); + let mut candidate = None; + for l in self.historic_layers.iter() { + if l.is_incremental() { + continue; + } - while let Some(oldest_entry) = self.open_layers.peek() { - if let Some(layer) = global_map.get(&oldest_entry.layer_id) { - return Some((oldest_entry.layer_id, layer, oldest_entry.generation)); - } else { - self.open_layers.pop(); + if !l.get_key_range().contains(&key) { + continue; + } + + let this_lsn = l.get_lsn_range().start; + if this_lsn > lsn { + continue; + } + if this_lsn < candidate_lsn { + // our previous candidate was better + continue; + } + candidate_lsn = this_lsn; + candidate = Some(Arc::clone(l)); + } + + candidate + } + + /// + /// Divide the whole given range of keys into sub-ranges based on the latest + /// image layer that covers each range. (This is used when creating new + /// image layers) + /// + // FIXME: clippy complains that the result type is very complex. She's probably + // right... + #[allow(clippy::type_complexity)] + pub fn image_coverage( + &self, + key_range: &Range, + lsn: Lsn, + ) -> Result, Option>)>> { + let mut points: Vec; + + points = vec![key_range.start]; + for l in self.historic_layers.iter() { + if l.get_lsn_range().start > lsn { + continue; + } + let range = l.get_key_range(); + if key_range.contains(&range.start) { + points.push(l.get_key_range().start); + } + if key_range.contains(&range.end) { + points.push(l.get_key_range().end); } } - None - } + points.push(key_range.end); - /// Increment the generation number used to stamp open in-memory layers. Layers - /// added with `insert_open` after this call will be associated with the new - /// generation. Returns the new generation number. - pub fn increment_generation(&mut self) -> u64 { - self.current_generation += 1; - self.current_generation - } + points.sort(); + points.dedup(); - pub fn iter_historic_layers(&self) -> HistoricLayerIter { - HistoricLayerIter { - seg_iter: self.segs.iter(), - iter: None, + // Ok, we now have a list of "interesting" points in the key space + + // For each range between the points, find the latest image + let mut start = *points.first().unwrap(); + let mut ranges = Vec::new(); + for end in points[1..].iter() { + let img = self.find_latest_image(start, lsn); + + ranges.push((start..*end, img)); + + start = *end; } + Ok(ranges) + } + + /// Count how many L1 delta layers there are that overlap with the + /// given key and LSN range. + pub fn count_deltas(&self, key_range: &Range, lsn_range: &Range) -> Result { + let mut result = 0; + for l in self.historic_layers.iter() { + if !l.is_incremental() { + continue; + } + if !range_overlaps(&l.get_lsn_range(), lsn_range) { + continue; + } + if !range_overlaps(&l.get_key_range(), key_range) { + continue; + } + + // We ignore level0 delta layers. Unless the whole keyspace fits + // into one partition + if !range_eq(key_range, &(Key::MIN..Key::MAX)) + && range_eq(&l.get_key_range(), &(Key::MIN..Key::MAX)) + { + continue; + } + + result += 1; + } + Ok(result) + } + + /// Return all L0 delta layers + pub fn get_level0_deltas(&self) -> Result>> { + let mut deltas = Vec::new(); + for l in self.historic_layers.iter() { + if !l.is_incremental() { + continue; + } + if l.get_key_range() != (Key::MIN..Key::MAX) { + continue; + } + deltas.push(Arc::clone(l)); + } + Ok(deltas) } /// debugging function to print out the contents of the layer map #[allow(unused)] pub fn dump(&self) -> Result<()> { println!("Begin dump LayerMap"); - for (seg, segentry) in self.segs.iter() { - if let Some(open) = &segentry.open_layer_id { - if let Some(layer) = GLOBAL_LAYER_MAP.read().unwrap().get(open) { - layer.dump()?; - } else { - println!("layer not found in global map"); - } - } - - for layer in segentry.historic.iter() { - layer.dump()?; - } + for layer in self.historic_layers.iter() { + layer.dump()?; } println!("End dump LayerMap"); Ok(()) } } - -impl IntervalItem for dyn Layer { - type Key = Lsn; - - fn start_key(&self) -> Lsn { - self.get_start_lsn() - } - fn end_key(&self) -> Lsn { - self.get_end_lsn() - } -} - -/// -/// Per-segment entry in the LayerMap::segs hash map. Holds all the layers -/// associated with the segment. -/// -/// The last layer that is open for writes is always an InMemoryLayer, -/// and is kept in a separate field, because there can be only one for -/// each segment. The older layers, stored on disk, are kept in an -/// IntervalTree. -#[derive(Default)] -struct SegEntry { - open_layer_id: Option, - historic: IntervalTree, -} - -impl SegEntry { - /// Does the segment exist at given LSN? - /// Return None if object is not found in this SegEntry. - fn exists_at_lsn(&self, lsn: Lsn) -> Result> { - if let Some(layer) = self.get(lsn) { - Ok(Some(layer.get_seg_exists(lsn)?)) - } else { - Ok(None) - } - } - - pub fn get(&self, lsn: Lsn) -> Option> { - if let Some(open_layer_id) = &self.open_layer_id { - let open_layer = GLOBAL_LAYER_MAP.read().unwrap().get(open_layer_id)?; - if open_layer.get_start_lsn() <= lsn { - return Some(open_layer); - } - } - - self.historic.search(lsn) - } - - pub fn newer_image_layer_exists(&self, lsn: Lsn, disk_consistent_lsn: Lsn) -> bool { - // We only check on-disk layers, because - // in-memory layers are not durable - - // The end-LSN is exclusive, while disk_consistent_lsn is - // inclusive. For example, if disk_consistent_lsn is 100, it is - // OK for a delta layer to have end LSN 101, but if the end LSN - // is 102, then it might not have been fully flushed to disk - // before crash. - self.historic - .iter_newer(lsn) - .any(|layer| !layer.is_incremental() && layer.get_end_lsn() <= disk_consistent_lsn + 1) - } - - // Set new open layer for a SegEntry. - // It's ok to rewrite previous open layer, - // but only if it is not writeable anymore. - pub fn update_open(&mut self, layer: Arc) -> LayerId { - if let Some(prev_open_layer_id) = &self.open_layer_id { - if let Some(prev_open_layer) = GLOBAL_LAYER_MAP.read().unwrap().get(prev_open_layer_id) - { - assert!(!prev_open_layer.is_writeable()); - } - } - let open_layer_id = GLOBAL_LAYER_MAP.write().unwrap().insert(layer); - self.open_layer_id = Some(open_layer_id); - open_layer_id - } - - pub fn insert_historic(&mut self, layer: Arc) { - self.historic.insert(layer); - } -} - -/// Entry held in LayerMap::open_layers, with boilerplate comparison routines -/// to implement a min-heap ordered by 'oldest_lsn' and 'generation' -/// -/// The generation number associated with each entry can be used to distinguish -/// recently-added entries (i.e after last call to increment_generation()) from older -/// entries with the same 'oldest_lsn'. -struct OpenLayerEntry { - oldest_lsn: Lsn, // copy of layer.get_oldest_lsn() - generation: u64, - layer_id: LayerId, -} -impl Ord for OpenLayerEntry { - fn cmp(&self, other: &Self) -> Ordering { - // BinaryHeap is a max-heap, and we want a min-heap. Reverse the ordering here - // to get that. Entries with identical oldest_lsn are ordered by generation - other - .oldest_lsn - .cmp(&self.oldest_lsn) - .then_with(|| other.generation.cmp(&self.generation)) - } -} -impl PartialOrd for OpenLayerEntry { - fn partial_cmp(&self, other: &Self) -> Option { - Some(self.cmp(other)) - } -} -impl PartialEq for OpenLayerEntry { - fn eq(&self, other: &Self) -> bool { - self.cmp(other) == Ordering::Equal - } -} -impl Eq for OpenLayerEntry {} - -/// Iterator returned by LayerMap::iter_historic_layers() -pub struct HistoricLayerIter<'a> { - seg_iter: std::collections::hash_map::Iter<'a, SegmentTag, SegEntry>, - iter: Option>, -} - -impl<'a> Iterator for HistoricLayerIter<'a> { - type Item = Arc; - - fn next(&mut self) -> std::option::Option<::Item> { - loop { - if let Some(x) = &mut self.iter { - if let Some(x) = x.next() { - return Some(Arc::clone(&x)); - } - } - if let Some((_tag, segentry)) = self.seg_iter.next() { - self.iter = Some(segentry.historic.iter()); - continue; - } else { - return None; - } - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - use crate::config::PageServerConf; - use std::str::FromStr; - use zenith_utils::zid::{ZTenantId, ZTimelineId}; - - /// Arbitrary relation tag, for testing. - const TESTREL_A: RelishTag = RelishTag::Relation(RelTag { - spcnode: 0, - dbnode: 111, - relnode: 1000, - forknum: 0, - }); - - lazy_static! { - static ref DUMMY_TIMELINEID: ZTimelineId = - ZTimelineId::from_str("00000000000000000000000000000000").unwrap(); - static ref DUMMY_TENANTID: ZTenantId = - ZTenantId::from_str("00000000000000000000000000000000").unwrap(); - } - - /// Construct a dummy InMemoryLayer for testing - fn dummy_inmem_layer( - conf: &'static PageServerConf, - segno: u32, - start_lsn: Lsn, - oldest_lsn: Lsn, - ) -> Arc { - Arc::new( - InMemoryLayer::create( - conf, - *DUMMY_TIMELINEID, - *DUMMY_TENANTID, - SegmentTag { - rel: TESTREL_A, - segno, - }, - start_lsn, - oldest_lsn, - ) - .unwrap(), - ) - } - - #[test] - fn test_open_layers() -> Result<()> { - let conf = PageServerConf::dummy_conf(PageServerConf::test_repo_dir("dummy_inmem_layer")); - let conf = Box::leak(Box::new(conf)); - std::fs::create_dir_all(conf.timeline_path(&DUMMY_TIMELINEID, &DUMMY_TENANTID))?; - - let mut layers = LayerMap::default(); - - let gen1 = layers.increment_generation(); - layers.insert_open(dummy_inmem_layer(conf, 0, Lsn(0x100), Lsn(0x100))); - layers.insert_open(dummy_inmem_layer(conf, 1, Lsn(0x100), Lsn(0x200))); - layers.insert_open(dummy_inmem_layer(conf, 2, Lsn(0x100), Lsn(0x120))); - layers.insert_open(dummy_inmem_layer(conf, 3, Lsn(0x100), Lsn(0x110))); - - let gen2 = layers.increment_generation(); - layers.insert_open(dummy_inmem_layer(conf, 4, Lsn(0x100), Lsn(0x110))); - layers.insert_open(dummy_inmem_layer(conf, 5, Lsn(0x100), Lsn(0x100))); - - // A helper function (closure) to pop the next oldest open entry from the layer map, - // and assert that it is what we'd expect - let mut assert_pop_layer = |expected_segno: u32, expected_generation: u64| { - let (layer_id, l, generation) = layers.peek_oldest_open().unwrap(); - assert!(l.get_seg_tag().segno == expected_segno); - assert!(generation == expected_generation); - layers.remove_open(layer_id); - }; - - assert_pop_layer(0, gen1); // 0x100 - assert_pop_layer(5, gen2); // 0x100 - assert_pop_layer(3, gen1); // 0x110 - assert_pop_layer(4, gen2); // 0x110 - assert_pop_layer(2, gen1); // 0x120 - assert_pop_layer(1, gen1); // 0x200 - - Ok(()) - } -} diff --git a/pageserver/src/layered_repository/metadata.rs b/pageserver/src/layered_repository/metadata.rs index 17e0485093..7daf899ba2 100644 --- a/pageserver/src/layered_repository/metadata.rs +++ b/pageserver/src/layered_repository/metadata.rs @@ -6,9 +6,10 @@ //! //! The module contains all structs and related helper methods related to timeline metadata. -use std::{convert::TryInto, path::PathBuf}; +use std::path::PathBuf; use anyhow::ensure; +use serde::{Deserialize, Serialize}; use zenith_utils::{ bin_ser::BeSer, lsn::Lsn, @@ -16,11 +17,13 @@ use zenith_utils::{ }; use crate::config::PageServerConf; +use crate::STORAGE_FORMAT_VERSION; -// Taken from PG_CONTROL_MAX_SAFE_SIZE -const METADATA_MAX_SAFE_SIZE: usize = 512; -const METADATA_CHECKSUM_SIZE: usize = std::mem::size_of::(); -const METADATA_MAX_DATA_SIZE: usize = METADATA_MAX_SAFE_SIZE - METADATA_CHECKSUM_SIZE; +/// We assume that a write of up to METADATA_MAX_SIZE bytes is atomic. +/// +/// This is the same assumption that PostgreSQL makes with the control file, +/// see PG_CONTROL_MAX_SAFE_SIZE +const METADATA_MAX_SIZE: usize = 512; /// The name of the metadata file pageserver creates per timeline. pub const METADATA_FILE_NAME: &str = "metadata"; @@ -30,6 +33,20 @@ pub const METADATA_FILE_NAME: &str = "metadata"; /// The fields correspond to the values we hold in memory, in LayeredTimeline. #[derive(Debug, Clone, PartialEq, Eq)] pub struct TimelineMetadata { + hdr: TimelineMetadataHeader, + body: TimelineMetadataBody, +} + +#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)] +struct TimelineMetadataHeader { + checksum: u32, // CRC of serialized metadata body + size: u16, // size of serialized metadata + format_version: u16, // storage format version (used for compatibility checks) +} +const METADATA_HDR_SIZE: usize = std::mem::size_of::(); + +#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)] +struct TimelineMetadataBody { disk_consistent_lsn: Lsn, // This is only set if we know it. We track it in memory when the page // server is running, but we only track the value corresponding to @@ -69,130 +86,90 @@ impl TimelineMetadata { initdb_lsn: Lsn, ) -> Self { Self { - disk_consistent_lsn, - prev_record_lsn, - ancestor_timeline, - ancestor_lsn, - latest_gc_cutoff_lsn, - initdb_lsn, + hdr: TimelineMetadataHeader { + checksum: 0, + size: 0, + format_version: STORAGE_FORMAT_VERSION, + }, + body: TimelineMetadataBody { + disk_consistent_lsn, + prev_record_lsn, + ancestor_timeline, + ancestor_lsn, + latest_gc_cutoff_lsn, + initdb_lsn, + }, } } pub fn from_bytes(metadata_bytes: &[u8]) -> anyhow::Result { ensure!( - metadata_bytes.len() == METADATA_MAX_SAFE_SIZE, + metadata_bytes.len() == METADATA_MAX_SIZE, "metadata bytes size is wrong" ); - - let data = &metadata_bytes[..METADATA_MAX_DATA_SIZE]; - let calculated_checksum = crc32c::crc32c(data); - - let checksum_bytes: &[u8; METADATA_CHECKSUM_SIZE] = - metadata_bytes[METADATA_MAX_DATA_SIZE..].try_into()?; - let expected_checksum = u32::from_le_bytes(*checksum_bytes); + let hdr = TimelineMetadataHeader::des(&metadata_bytes[0..METADATA_HDR_SIZE])?; ensure!( - calculated_checksum == expected_checksum, + hdr.format_version == STORAGE_FORMAT_VERSION, + "format version mismatch" + ); + let metadata_size = hdr.size as usize; + ensure!( + metadata_size <= METADATA_MAX_SIZE, + "corrupted metadata file" + ); + let calculated_checksum = crc32c::crc32c(&metadata_bytes[METADATA_HDR_SIZE..metadata_size]); + ensure!( + hdr.checksum == calculated_checksum, "metadata checksum mismatch" ); + let body = TimelineMetadataBody::des(&metadata_bytes[METADATA_HDR_SIZE..metadata_size])?; + ensure!( + body.disk_consistent_lsn.is_aligned(), + "disk_consistent_lsn is not aligned" + ); - let data = TimelineMetadata::from(serialize::DeTimelineMetadata::des_prefix(data)?); - ensure!(data.disk_consistent_lsn.is_aligned()); - - Ok(data) + Ok(TimelineMetadata { hdr, body }) } pub fn to_bytes(&self) -> anyhow::Result> { - let serializeable_metadata = serialize::SeTimelineMetadata::from(self); - let mut metadata_bytes = serialize::SeTimelineMetadata::ser(&serializeable_metadata)?; - ensure!(metadata_bytes.len() <= METADATA_MAX_DATA_SIZE); - metadata_bytes.resize(METADATA_MAX_SAFE_SIZE, 0u8); - - let checksum = crc32c::crc32c(&metadata_bytes[..METADATA_MAX_DATA_SIZE]); - metadata_bytes[METADATA_MAX_DATA_SIZE..].copy_from_slice(&u32::to_le_bytes(checksum)); + let body_bytes = self.body.ser()?; + let metadata_size = METADATA_HDR_SIZE + body_bytes.len(); + let hdr = TimelineMetadataHeader { + size: metadata_size as u16, + format_version: STORAGE_FORMAT_VERSION, + checksum: crc32c::crc32c(&body_bytes), + }; + let hdr_bytes = hdr.ser()?; + let mut metadata_bytes = vec![0u8; METADATA_MAX_SIZE]; + metadata_bytes[0..METADATA_HDR_SIZE].copy_from_slice(&hdr_bytes); + metadata_bytes[METADATA_HDR_SIZE..metadata_size].copy_from_slice(&body_bytes); Ok(metadata_bytes) } /// [`Lsn`] that corresponds to the corresponding timeline directory /// contents, stored locally in the pageserver workdir. pub fn disk_consistent_lsn(&self) -> Lsn { - self.disk_consistent_lsn + self.body.disk_consistent_lsn } pub fn prev_record_lsn(&self) -> Option { - self.prev_record_lsn + self.body.prev_record_lsn } pub fn ancestor_timeline(&self) -> Option { - self.ancestor_timeline + self.body.ancestor_timeline } pub fn ancestor_lsn(&self) -> Lsn { - self.ancestor_lsn + self.body.ancestor_lsn } pub fn latest_gc_cutoff_lsn(&self) -> Lsn { - self.latest_gc_cutoff_lsn + self.body.latest_gc_cutoff_lsn } pub fn initdb_lsn(&self) -> Lsn { - self.initdb_lsn - } -} - -/// This module is for direct conversion of metadata to bytes and back. -/// For a certain metadata, besides the conversion a few verification steps has to -/// be done, so all serde derives are hidden from the user, to avoid accidental -/// verification-less metadata creation. -mod serialize { - use serde::{Deserialize, Serialize}; - use zenith_utils::{lsn::Lsn, zid::ZTimelineId}; - - use super::TimelineMetadata; - - #[derive(Serialize)] - pub(super) struct SeTimelineMetadata<'a> { - disk_consistent_lsn: &'a Lsn, - prev_record_lsn: &'a Option, - ancestor_timeline: &'a Option, - ancestor_lsn: &'a Lsn, - latest_gc_cutoff_lsn: &'a Lsn, - initdb_lsn: &'a Lsn, - } - - impl<'a> From<&'a TimelineMetadata> for SeTimelineMetadata<'a> { - fn from(other: &'a TimelineMetadata) -> Self { - Self { - disk_consistent_lsn: &other.disk_consistent_lsn, - prev_record_lsn: &other.prev_record_lsn, - ancestor_timeline: &other.ancestor_timeline, - ancestor_lsn: &other.ancestor_lsn, - latest_gc_cutoff_lsn: &other.latest_gc_cutoff_lsn, - initdb_lsn: &other.initdb_lsn, - } - } - } - - #[derive(Deserialize)] - pub(super) struct DeTimelineMetadata { - disk_consistent_lsn: Lsn, - prev_record_lsn: Option, - ancestor_timeline: Option, - ancestor_lsn: Lsn, - latest_gc_cutoff_lsn: Lsn, - initdb_lsn: Lsn, - } - - impl From for TimelineMetadata { - fn from(other: DeTimelineMetadata) -> Self { - Self { - disk_consistent_lsn: other.disk_consistent_lsn, - prev_record_lsn: other.prev_record_lsn, - ancestor_timeline: other.ancestor_timeline, - ancestor_lsn: other.ancestor_lsn, - latest_gc_cutoff_lsn: other.latest_gc_cutoff_lsn, - initdb_lsn: other.initdb_lsn, - } - } + self.body.initdb_lsn } } @@ -204,14 +181,14 @@ mod tests { #[test] fn metadata_serializes_correctly() { - let original_metadata = TimelineMetadata { - disk_consistent_lsn: Lsn(0x200), - prev_record_lsn: Some(Lsn(0x100)), - ancestor_timeline: Some(TIMELINE_ID), - ancestor_lsn: Lsn(0), - latest_gc_cutoff_lsn: Lsn(0), - initdb_lsn: Lsn(0), - }; + let original_metadata = TimelineMetadata::new( + Lsn(0x200), + Some(Lsn(0x100)), + Some(TIMELINE_ID), + Lsn(0), + Lsn(0), + Lsn(0), + ); let metadata_bytes = original_metadata .to_bytes() @@ -221,7 +198,7 @@ mod tests { .expect("Should deserialize its own bytes"); assert_eq!( - deserialized_metadata, original_metadata, + deserialized_metadata.body, original_metadata.body, "Metadata that was serialized to bytes and deserialized back should not change" ); } diff --git a/pageserver/src/layered_repository/storage_layer.rs b/pageserver/src/layered_repository/storage_layer.rs index 8976491fc0..de34545980 100644 --- a/pageserver/src/layered_repository/storage_layer.rs +++ b/pageserver/src/layered_repository/storage_layer.rs @@ -2,139 +2,102 @@ //! Common traits and structs for layers //! -use crate::relish::RelishTag; -use crate::repository::{BlockNumber, ZenithWalRecord}; +use crate::repository::{Key, Value}; +use crate::walrecord::ZenithWalRecord; use crate::{ZTenantId, ZTimelineId}; use anyhow::Result; use bytes::Bytes; use serde::{Deserialize, Serialize}; -use std::fmt; +use std::ops::Range; use std::path::PathBuf; use zenith_utils::lsn::Lsn; -// Size of one segment in pages (10 MB) -pub const RELISH_SEG_SIZE: u32 = 10 * 1024 * 1024 / 8192; - -/// -/// Each relish stored in the repository is divided into fixed-sized "segments", -/// with 10 MB of key-space, or 1280 8k pages each. -/// -#[derive(Debug, PartialEq, Eq, PartialOrd, Hash, Ord, Clone, Copy, Serialize, Deserialize)] -pub struct SegmentTag { - pub rel: RelishTag, - pub segno: u32, -} - -/// SegmentBlk represents a block number within a segment, or the size of segment. -/// -/// This is separate from BlockNumber, which is used for block number within the -/// whole relish. Since this is just a type alias, the compiler will let you mix -/// them freely, but we use the type alias as documentation to make it clear -/// which one we're dealing with. -/// -/// (We could turn this into "struct SegmentBlk(u32)" to forbid accidentally -/// assigning a BlockNumber to SegmentBlk or vice versa, but that makes -/// operations more verbose). -pub type SegmentBlk = u32; - -impl fmt::Display for SegmentTag { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "{}.{}", self.rel, self.segno) +pub fn range_overlaps(a: &Range, b: &Range) -> bool +where + T: PartialOrd, +{ + if a.start < b.start { + a.end > b.start + } else { + b.end > a.start } } -impl SegmentTag { - /// Given a relish and block number, calculate the corresponding segment and - /// block number within the segment. - pub const fn from_blknum(rel: RelishTag, blknum: BlockNumber) -> (SegmentTag, SegmentBlk) { - ( - SegmentTag { - rel, - segno: blknum / RELISH_SEG_SIZE, - }, - blknum % RELISH_SEG_SIZE, - ) - } +pub fn range_eq(a: &Range, b: &Range) -> bool +where + T: PartialEq, +{ + a.start == b.start && a.end == b.end } +/// Struct used to communicate across calls to 'get_value_reconstruct_data'. /// -/// Represents a version of a page at a specific LSN. The LSN is the key of the -/// entry in the 'page_versions' hash, it is not duplicated here. +/// Before first call, you can fill in 'page_img' if you have an older cached +/// version of the page available. That can save work in +/// 'get_value_reconstruct_data', as it can stop searching for page versions +/// when all the WAL records going back to the cached image have been collected. /// -/// A page version can be stored as a full page image, or as WAL record that needs -/// to be applied over the previous page version to reconstruct this version. -#[derive(Debug, Clone, Serialize, Deserialize)] -pub enum PageVersion { - Page(Bytes), - Wal(ZenithWalRecord), -} - -/// -/// Struct used to communicate across calls to 'get_page_reconstruct_data'. -/// -/// Before first call to get_page_reconstruct_data, you can fill in 'page_img' -/// if you have an older cached version of the page available. That can save -/// work in 'get_page_reconstruct_data', as it can stop searching for page -/// versions when all the WAL records going back to the cached image have been -/// collected. -/// -/// When get_page_reconstruct_data returns Complete, 'page_img' is set to an -/// image of the page, or the oldest WAL record in 'records' is a will_init-type +/// When get_value_reconstruct_data returns Complete, 'img' is set to an image +/// of the page, or the oldest WAL record in 'records' is a will_init-type /// record that initializes the page without requiring a previous image. /// /// If 'get_page_reconstruct_data' returns Continue, some 'records' may have /// been collected, but there are more records outside the current layer. Pass -/// the same PageReconstructData struct in the next 'get_page_reconstruct_data' +/// the same ValueReconstructState struct in the next 'get_value_reconstruct_data' /// call, to collect more records. /// -pub struct PageReconstructData { +#[derive(Debug)] +pub struct ValueReconstructState { pub records: Vec<(Lsn, ZenithWalRecord)>, - pub page_img: Option<(Lsn, Bytes)>, + pub img: Option<(Lsn, Bytes)>, } /// Return value from Layer::get_page_reconstruct_data -pub enum PageReconstructResult { +#[derive(Clone, Copy, Debug)] +pub enum ValueReconstructResult { /// Got all the data needed to reconstruct the requested page Complete, /// This layer didn't contain all the required data, the caller should look up /// the predecessor layer at the returned LSN and collect more data from there. - Continue(Lsn), + Continue, + /// This layer didn't contain data needed to reconstruct the page version at /// the returned LSN. This is usually considered an error, but might be OK /// in some circumstances. - Missing(Lsn), + Missing, } +/// A Layer contains all data in a "rectangle" consisting of a range of keys and +/// range of LSNs. /// -/// A Layer corresponds to one RELISH_SEG_SIZE slice of a relish in a range of LSNs. /// There are two kinds of layers, in-memory and on-disk layers. In-memory -/// layers are used to ingest incoming WAL, and provide fast access -/// to the recent page versions. On-disk layers are stored as files on disk, and -/// are immutable. This trait presents the common functionality of -/// in-memory and on-disk layers. +/// layers are used to ingest incoming WAL, and provide fast access to the +/// recent page versions. On-disk layers are stored as files on disk, and are +/// immutable. This trait presents the common functionality of in-memory and +/// on-disk layers. +/// +/// Furthermore, there are two kinds of on-disk layers: delta and image layers. +/// A delta layer contains all modifications within a range of LSNs and keys. +/// An image layer is a snapshot of all the data in a key-range, at a single +/// LSN /// pub trait Layer: Send + Sync { fn get_tenant_id(&self) -> ZTenantId; - /// Identify the timeline this relish belongs to + /// Identify the timeline this layer belongs to fn get_timeline_id(&self) -> ZTimelineId; - /// Identify the relish segment - fn get_seg_tag(&self) -> SegmentTag; + /// Range of segments that this layer covers + fn get_key_range(&self) -> Range; /// Inclusive start bound of the LSN range that this layer holds - fn get_start_lsn(&self) -> Lsn; - /// Exclusive end bound of the LSN range that this layer holds. /// /// - For an open in-memory layer, this is MAX_LSN. /// - For a frozen in-memory layer or a delta layer, this is a valid end bound. /// - An image layer represents snapshot at one LSN, so end_lsn is always the snapshot LSN + 1 - fn get_end_lsn(&self) -> Lsn; - - /// Is the segment represented by this layer dropped by PostgreSQL? - fn is_dropped(&self) -> bool; + fn get_lsn_range(&self) -> Range; /// Filename used to store this layer on disk. (Even in-memory layers /// implement this, to print a handy unique identifier for the layer for @@ -153,18 +116,12 @@ pub trait Layer: Send + Sync { /// is available. If this returns PageReconstructResult::Continue, look up /// the predecessor layer and call again with the same 'reconstruct_data' to /// collect more data. - fn get_page_reconstruct_data( + fn get_value_reconstruct_data( &self, - blknum: SegmentBlk, - lsn: Lsn, - reconstruct_data: &mut PageReconstructData, - ) -> Result; - - /// Return size of the segment at given LSN. (Only for blocky relations.) - fn get_seg_size(&self, lsn: Lsn) -> Result; - - /// Does the segment exist at given LSN? Or was it dropped before it. - fn get_seg_exists(&self, lsn: Lsn) -> Result; + key: Key, + lsn_range: Range, + reconstruct_data: &mut ValueReconstructState, + ) -> Result; /// Does this layer only contain some data for the segment (incremental), /// or does it contain a version of every page? This is important to know @@ -175,6 +132,9 @@ pub trait Layer: Send + Sync { /// Returns true for layers that are represented in memory. fn is_in_memory(&self) -> bool; + /// Iterate through all keys and values stored in the layer + fn iter(&self) -> Box> + '_>; + /// Release memory used by this layer. There is no corresponding 'load' /// function, that's done implicitly when you call one of the get-functions. fn unload(&self) -> Result<()>; @@ -185,3 +145,36 @@ pub trait Layer: Send + Sync { /// Dump summary of the contents of the layer to stdout fn dump(&self) -> Result<()>; } + +// Flag indicating that this version initialize the page +const WILL_INIT: u64 = 1; + +/// +/// Struct representing reference to BLOB in layers. Reference contains BLOB offset and size. +/// For WAL records (delta layer) it also contains `will_init` flag which helps to determine range of records +/// which needs to be applied without reading/deserializing records themselves. +/// +#[derive(Debug, Serialize, Deserialize, Copy, Clone)] +pub struct BlobRef(u64); + +impl BlobRef { + pub fn will_init(&self) -> bool { + (self.0 & WILL_INIT) != 0 + } + + pub fn pos(&self) -> u64 { + self.0 >> 32 + } + + pub fn size(&self) -> usize { + ((self.0 & 0xFFFFFFFF) >> 1) as usize + } + + pub fn new(pos: u64, size: usize, will_init: bool) -> BlobRef { + let mut blob_ref = (pos << 32) | ((size as u64) << 1); + if will_init { + blob_ref |= WILL_INIT; + } + BlobRef(blob_ref) + } +} diff --git a/pageserver/src/lib.rs b/pageserver/src/lib.rs index 060fa54b23..4790ab6652 100644 --- a/pageserver/src/lib.rs +++ b/pageserver/src/lib.rs @@ -2,10 +2,12 @@ pub mod basebackup; pub mod config; pub mod http; pub mod import_datadir; +pub mod keyspace; pub mod layered_repository; pub mod page_cache; pub mod page_service; -pub mod relish; +pub mod pgdatadir_mapping; +pub mod reltag; pub mod remote_storage; pub mod repository; pub mod tenant_mgr; @@ -28,6 +30,20 @@ use zenith_utils::{ use crate::thread_mgr::ThreadKind; +use layered_repository::LayeredRepository; +use pgdatadir_mapping::DatadirTimeline; + +/// Current storage format version +/// +/// This is embedded in the metadata file, and also in the header of all the +/// layer files. If you make any backwards-incompatible changes to the storage +/// format, bump this! +pub const STORAGE_FORMAT_VERSION: u16 = 1; + +// Magic constants used to identify different kinds of files +pub const IMAGE_FILE_MAGIC: u32 = 0x5A60_0000 | STORAGE_FORMAT_VERSION as u32; +pub const DELTA_FILE_MAGIC: u32 = 0x5A61_0000 | STORAGE_FORMAT_VERSION as u32; + lazy_static! { static ref LIVE_CONNECTIONS_COUNT: IntGaugeVec = register_int_gauge_vec!( "pageserver_live_connections_count", @@ -42,14 +58,16 @@ pub const LOG_FILE_NAME: &str = "pageserver.log"; /// Config for the Repository checkpointer #[derive(Debug, Clone, Copy)] pub enum CheckpointConfig { - // Flush in-memory data that is older than this - Distance(u64), // Flush all in-memory data Flush, // Flush all in-memory data and reconstruct all page images Forced, } +pub type RepositoryImpl = LayeredRepository; + +pub type DatadirTimelineImpl = DatadirTimeline; + pub fn shutdown_pageserver() { // Shut down the libpq endpoint thread. This prevents new connections from // being accepted. diff --git a/pageserver/src/page_cache.rs b/pageserver/src/page_cache.rs index ef802ba0e2..299575f792 100644 --- a/pageserver/src/page_cache.rs +++ b/pageserver/src/page_cache.rs @@ -53,7 +53,7 @@ use zenith_utils::{ }; use crate::layered_repository::writeback_ephemeral_file; -use crate::relish::RelTag; +use crate::repository::Key; static PAGE_CACHE: OnceCell = OnceCell::new(); const TEST_PAGE_CACHE_SIZE: usize = 10; @@ -105,8 +105,7 @@ enum CacheKey { struct MaterializedPageHashKey { tenant_id: ZTenantId, timeline_id: ZTimelineId, - rel_tag: RelTag, - blknum: u32, + key: Key, } #[derive(Clone)] @@ -291,16 +290,14 @@ impl PageCache { &self, tenant_id: ZTenantId, timeline_id: ZTimelineId, - rel_tag: RelTag, - blknum: u32, + key: &Key, lsn: Lsn, ) -> Option<(Lsn, PageReadGuard)> { let mut cache_key = CacheKey::MaterializedPage { hash_key: MaterializedPageHashKey { tenant_id, timeline_id, - rel_tag, - blknum, + key: *key, }, lsn, }; @@ -323,8 +320,7 @@ impl PageCache { &self, tenant_id: ZTenantId, timeline_id: ZTimelineId, - rel_tag: RelTag, - blknum: u32, + key: Key, lsn: Lsn, img: &[u8], ) { @@ -332,8 +328,7 @@ impl PageCache { hash_key: MaterializedPageHashKey { tenant_id, timeline_id, - rel_tag, - blknum, + key, }, lsn, }; diff --git a/pageserver/src/page_service.rs b/pageserver/src/page_service.rs index 4744f0fe52..43e1ec275d 100644 --- a/pageserver/src/page_service.rs +++ b/pageserver/src/page_service.rs @@ -32,7 +32,9 @@ use zenith_utils::zid::{ZTenantId, ZTimelineId}; use crate::basebackup; use crate::config::PageServerConf; -use crate::relish::*; +use crate::pgdatadir_mapping::DatadirTimeline; +use crate::reltag::RelTag; +use crate::repository::Repository; use crate::repository::Timeline; use crate::tenant_mgr; use crate::thread_mgr; @@ -398,8 +400,8 @@ impl PageServerHandler { /// In either case, if the page server hasn't received the WAL up to the /// requested LSN yet, we will wait for it to arrive. The return value is /// the LSN that should be used to look up the page versions. - fn wait_or_get_last_lsn( - timeline: &dyn Timeline, + fn wait_or_get_last_lsn( + timeline: &DatadirTimeline, mut lsn: Lsn, latest: bool, latest_gc_cutoff_lsn: &RwLockReadGuard, @@ -426,7 +428,7 @@ impl PageServerHandler { if lsn <= last_record_lsn { lsn = last_record_lsn; } else { - timeline.wait_lsn(lsn)?; + timeline.tline.wait_lsn(lsn)?; // Since we waited for 'lsn' to arrive, that is now the last // record LSN. (Or close enough for our purposes; the // last-record LSN can advance immediately after we return @@ -436,7 +438,7 @@ impl PageServerHandler { if lsn == Lsn(0) { bail!("invalid LSN(0) in request"); } - timeline.wait_lsn(lsn)?; + timeline.tline.wait_lsn(lsn)?; } ensure!( lsn >= **latest_gc_cutoff_lsn, @@ -446,54 +448,47 @@ impl PageServerHandler { Ok(lsn) } - fn handle_get_rel_exists_request( + fn handle_get_rel_exists_request( &self, - timeline: &dyn Timeline, + timeline: &DatadirTimeline, req: &PagestreamExistsRequest, ) -> Result { let _enter = info_span!("get_rel_exists", rel = %req.rel, req_lsn = %req.lsn).entered(); - let tag = RelishTag::Relation(req.rel); - let latest_gc_cutoff_lsn = timeline.get_latest_gc_cutoff_lsn(); + let latest_gc_cutoff_lsn = timeline.tline.get_latest_gc_cutoff_lsn(); let lsn = Self::wait_or_get_last_lsn(timeline, req.lsn, req.latest, &latest_gc_cutoff_lsn)?; - let exists = timeline.get_rel_exists(tag, lsn)?; + let exists = timeline.get_rel_exists(req.rel, lsn)?; Ok(PagestreamBeMessage::Exists(PagestreamExistsResponse { exists, })) } - fn handle_get_nblocks_request( + fn handle_get_nblocks_request( &self, - timeline: &dyn Timeline, + timeline: &DatadirTimeline, req: &PagestreamNblocksRequest, ) -> Result { let _enter = info_span!("get_nblocks", rel = %req.rel, req_lsn = %req.lsn).entered(); - let tag = RelishTag::Relation(req.rel); - let latest_gc_cutoff_lsn = timeline.get_latest_gc_cutoff_lsn(); + let latest_gc_cutoff_lsn = timeline.tline.get_latest_gc_cutoff_lsn(); let lsn = Self::wait_or_get_last_lsn(timeline, req.lsn, req.latest, &latest_gc_cutoff_lsn)?; - let n_blocks = timeline.get_relish_size(tag, lsn)?; - - // Return 0 if relation is not found. - // This is what postgres smgr expects. - let n_blocks = n_blocks.unwrap_or(0); + let n_blocks = timeline.get_rel_size(req.rel, lsn)?; Ok(PagestreamBeMessage::Nblocks(PagestreamNblocksResponse { n_blocks, })) } - fn handle_get_page_at_lsn_request( + fn handle_get_page_at_lsn_request( &self, - timeline: &dyn Timeline, + timeline: &DatadirTimeline, req: &PagestreamGetPageRequest, ) -> Result { let _enter = info_span!("get_page", rel = %req.rel, blkno = &req.blkno, req_lsn = %req.lsn) .entered(); - let tag = RelishTag::Relation(req.rel); - let latest_gc_cutoff_lsn = timeline.get_latest_gc_cutoff_lsn(); + let latest_gc_cutoff_lsn = timeline.tline.get_latest_gc_cutoff_lsn(); let lsn = Self::wait_or_get_last_lsn(timeline, req.lsn, req.latest, &latest_gc_cutoff_lsn)?; /* // Add a 1s delay to some requests. The delayed causes the requests to @@ -503,7 +498,7 @@ impl PageServerHandler { std::thread::sleep(std::time::Duration::from_millis(1000)); } */ - let page = timeline.get_page_at_lsn(tag, req.blkno, lsn)?; + let page = timeline.get_rel_page_at_lsn(req.rel, req.blkno, lsn)?; Ok(PagestreamBeMessage::GetPage(PagestreamGetPageResponse { page, @@ -523,7 +518,7 @@ impl PageServerHandler { // check that the timeline exists let timeline = tenant_mgr::get_timeline_for_tenant_load(tenantid, timelineid) .context("Cannot load local timeline")?; - let latest_gc_cutoff_lsn = timeline.get_latest_gc_cutoff_lsn(); + let latest_gc_cutoff_lsn = timeline.tline.get_latest_gc_cutoff_lsn(); if let Some(lsn) = lsn { timeline .check_lsn_is_in_scope(lsn, &latest_gc_cutoff_lsn) @@ -701,67 +696,19 @@ impl postgres_backend::Handler for PageServerHandler { let repo = tenant_mgr::get_repository_for_tenant(tenantid)?; let result = repo.gc_iteration(Some(timelineid), gc_horizon, true)?; pgb.write_message_noflush(&BeMessage::RowDescription(&[ - RowDescriptor::int8_col(b"layer_relfiles_total"), - RowDescriptor::int8_col(b"layer_relfiles_needed_by_cutoff"), - RowDescriptor::int8_col(b"layer_relfiles_needed_by_branches"), - RowDescriptor::int8_col(b"layer_relfiles_not_updated"), - RowDescriptor::int8_col(b"layer_relfiles_needed_as_tombstone"), - RowDescriptor::int8_col(b"layer_relfiles_removed"), - RowDescriptor::int8_col(b"layer_relfiles_dropped"), - RowDescriptor::int8_col(b"layer_nonrelfiles_total"), - RowDescriptor::int8_col(b"layer_nonrelfiles_needed_by_cutoff"), - RowDescriptor::int8_col(b"layer_nonrelfiles_needed_by_branches"), - RowDescriptor::int8_col(b"layer_nonrelfiles_not_updated"), - RowDescriptor::int8_col(b"layer_nonrelfiles_needed_as_tombstone"), - RowDescriptor::int8_col(b"layer_nonrelfiles_removed"), - RowDescriptor::int8_col(b"layer_nonrelfiles_dropped"), + RowDescriptor::int8_col(b"layers_total"), + RowDescriptor::int8_col(b"layers_needed_by_cutoff"), + RowDescriptor::int8_col(b"layers_needed_by_branches"), + RowDescriptor::int8_col(b"layers_not_updated"), + RowDescriptor::int8_col(b"layers_removed"), RowDescriptor::int8_col(b"elapsed"), ]))? .write_message_noflush(&BeMessage::DataRow(&[ - Some(result.ondisk_relfiles_total.to_string().as_bytes()), - Some( - result - .ondisk_relfiles_needed_by_cutoff - .to_string() - .as_bytes(), - ), - Some( - result - .ondisk_relfiles_needed_by_branches - .to_string() - .as_bytes(), - ), - Some(result.ondisk_relfiles_not_updated.to_string().as_bytes()), - Some( - result - .ondisk_relfiles_needed_as_tombstone - .to_string() - .as_bytes(), - ), - Some(result.ondisk_relfiles_removed.to_string().as_bytes()), - Some(result.ondisk_relfiles_dropped.to_string().as_bytes()), - Some(result.ondisk_nonrelfiles_total.to_string().as_bytes()), - Some( - result - .ondisk_nonrelfiles_needed_by_cutoff - .to_string() - .as_bytes(), - ), - Some( - result - .ondisk_nonrelfiles_needed_by_branches - .to_string() - .as_bytes(), - ), - Some(result.ondisk_nonrelfiles_not_updated.to_string().as_bytes()), - Some( - result - .ondisk_nonrelfiles_needed_as_tombstone - .to_string() - .as_bytes(), - ), - Some(result.ondisk_nonrelfiles_removed.to_string().as_bytes()), - Some(result.ondisk_nonrelfiles_dropped.to_string().as_bytes()), + Some(result.layers_total.to_string().as_bytes()), + Some(result.layers_needed_by_cutoff.to_string().as_bytes()), + Some(result.layers_needed_by_branches.to_string().as_bytes()), + Some(result.layers_not_updated.to_string().as_bytes()), + Some(result.layers_removed.to_string().as_bytes()), Some(result.elapsed.as_millis().to_string().as_bytes()), ]))? .write_message(&BeMessage::CommandComplete(b"SELECT 1"))?; @@ -781,7 +728,14 @@ impl postgres_backend::Handler for PageServerHandler { let timeline = tenant_mgr::get_timeline_for_tenant_load(tenantid, timelineid) .context("Cannot load local timeline")?; - timeline.checkpoint(CheckpointConfig::Forced)?; + timeline.tline.checkpoint(CheckpointConfig::Forced)?; + + // Also compact it. + // + // FIXME: This probably shouldn't be part of a "checkpoint" command, but a + // separate operation. Update the tests if you change this. + timeline.tline.compact()?; + pgb.write_message_noflush(&SINGLE_COL_ROWDESC)? .write_message_noflush(&BeMessage::CommandComplete(b"SELECT 1"))?; } else { diff --git a/pageserver/src/pgdatadir_mapping.rs b/pageserver/src/pgdatadir_mapping.rs new file mode 100644 index 0000000000..7b0fc606de --- /dev/null +++ b/pageserver/src/pgdatadir_mapping.rs @@ -0,0 +1,1350 @@ +//! +//! This provides an abstraction to store PostgreSQL relations and other files +//! in the key-value store that implements the Repository interface. +//! +//! (TODO: The line between PUT-functions here and walingest.rs is a bit blurry, as +//! walingest.rs handles a few things like implicit relation creation and extension. +//! Clarify that) +//! +use crate::keyspace::{KeySpace, KeySpaceAccum, TARGET_FILE_SIZE_BYTES}; +use crate::reltag::{RelTag, SlruKind}; +use crate::repository::*; +use crate::repository::{Repository, Timeline}; +use crate::walrecord::ZenithWalRecord; +use anyhow::{bail, ensure, Result}; +use bytes::{Buf, Bytes}; +use postgres_ffi::{pg_constants, Oid, TransactionId}; +use serde::{Deserialize, Serialize}; +use std::collections::{HashMap, HashSet}; +use std::ops::Range; +use std::sync::atomic::{AtomicIsize, Ordering}; +use std::sync::{Arc, RwLockReadGuard}; +use tracing::{debug, error, trace, warn}; +use zenith_utils::bin_ser::BeSer; +use zenith_utils::lsn::AtomicLsn; +use zenith_utils::lsn::Lsn; + +/// Block number within a relation or SLRU. This matches PostgreSQL's BlockNumber type. +pub type BlockNumber = u32; + +pub struct DatadirTimeline +where + R: Repository, +{ + /// The underlying key-value store. Callers should not read or modify the + /// data in the underlying store directly. However, it is exposed to have + /// access to information like last-LSN, ancestor, and operations like + /// compaction. + pub tline: Arc, + + /// When did we last calculate the partitioning? + last_partitioning: AtomicLsn, + + /// Configuration: how often should the partitioning be recalculated. + repartition_threshold: u64, + + /// Current logical size of the "datadir", at the last LSN. + current_logical_size: AtomicIsize, +} + +impl DatadirTimeline { + pub fn new(tline: Arc, repartition_threshold: u64) -> Self { + DatadirTimeline { + tline, + last_partitioning: AtomicLsn::new(0), + current_logical_size: AtomicIsize::new(0), + repartition_threshold, + } + } + + /// (Re-)calculate the logical size of the database at the latest LSN. + /// + /// This can be a slow operation. + pub fn init_logical_size(&self) -> Result<()> { + let last_lsn = self.tline.get_last_record_lsn(); + self.current_logical_size.store( + self.get_current_logical_size_non_incremental(last_lsn)? as isize, + Ordering::SeqCst, + ); + Ok(()) + } + + /// Start ingesting a WAL record, or other atomic modification of + /// the timeline. + /// + /// This provides a transaction-like interface to perform a bunch + /// of modifications atomically, all stamped with one LSN. + /// + /// To ingest a WAL record, call begin_modification(lsn) to get a + /// DatadirModification object. Use the functions in the object to + /// modify the repository state, updating all the pages and metadata + /// that the WAL record affects. When you're done, call commit() to + /// commit the changes. + /// + /// Note that any pending modifications you make through the + /// modification object won't be visible to calls to the 'get' and list + /// functions of the timeline until you finish! And if you update the + /// same page twice, the last update wins. + /// + pub fn begin_modification(&self, lsn: Lsn) -> DatadirModification { + DatadirModification { + tline: self, + lsn, + pending_updates: HashMap::new(), + pending_deletions: Vec::new(), + pending_nblocks: 0, + } + } + + //------------------------------------------------------------------------------ + // Public GET functions + //------------------------------------------------------------------------------ + + /// Look up given page version. + pub fn get_rel_page_at_lsn(&self, tag: RelTag, blknum: BlockNumber, lsn: Lsn) -> Result { + ensure!(tag.relnode != 0, "invalid relnode"); + + let nblocks = self.get_rel_size(tag, lsn)?; + if blknum >= nblocks { + debug!( + "read beyond EOF at {} blk {} at {}, size is {}: returning all-zeros page", + tag, blknum, lsn, nblocks + ); + return Ok(ZERO_PAGE.clone()); + } + + let key = rel_block_to_key(tag, blknum); + self.tline.get(key, lsn) + } + + /// Get size of a relation file + pub fn get_rel_size(&self, tag: RelTag, lsn: Lsn) -> Result { + ensure!(tag.relnode != 0, "invalid relnode"); + + if (tag.forknum == pg_constants::FSM_FORKNUM + || tag.forknum == pg_constants::VISIBILITYMAP_FORKNUM) + && !self.get_rel_exists(tag, lsn)? + { + // FIXME: Postgres sometimes calls smgrcreate() to create + // FSM, and smgrnblocks() on it immediately afterwards, + // without extending it. Tolerate that by claiming that + // any non-existent FSM fork has size 0. + return Ok(0); + } + + let key = rel_size_to_key(tag); + let mut buf = self.tline.get(key, lsn)?; + Ok(buf.get_u32_le()) + } + + /// Does relation exist? + pub fn get_rel_exists(&self, tag: RelTag, lsn: Lsn) -> Result { + ensure!(tag.relnode != 0, "invalid relnode"); + + // fetch directory listing + let key = rel_dir_to_key(tag.spcnode, tag.dbnode); + let buf = self.tline.get(key, lsn)?; + let dir = RelDirectory::des(&buf)?; + + let exists = dir.rels.get(&(tag.relnode, tag.forknum)).is_some(); + + Ok(exists) + } + + /// Get a list of all existing relations in given tablespace and database. + pub fn list_rels(&self, spcnode: Oid, dbnode: Oid, lsn: Lsn) -> Result> { + // fetch directory listing + let key = rel_dir_to_key(spcnode, dbnode); + let buf = self.tline.get(key, lsn)?; + let dir = RelDirectory::des(&buf)?; + + let rels: HashSet = + HashSet::from_iter(dir.rels.iter().map(|(relnode, forknum)| RelTag { + spcnode, + dbnode, + relnode: *relnode, + forknum: *forknum, + })); + + Ok(rels) + } + + /// Look up given SLRU page version. + pub fn get_slru_page_at_lsn( + &self, + kind: SlruKind, + segno: u32, + blknum: BlockNumber, + lsn: Lsn, + ) -> Result { + let key = slru_block_to_key(kind, segno, blknum); + self.tline.get(key, lsn) + } + + /// Get size of an SLRU segment + pub fn get_slru_segment_size( + &self, + kind: SlruKind, + segno: u32, + lsn: Lsn, + ) -> Result { + let key = slru_segment_size_to_key(kind, segno); + let mut buf = self.tline.get(key, lsn)?; + Ok(buf.get_u32_le()) + } + + /// Get size of an SLRU segment + pub fn get_slru_segment_exists(&self, kind: SlruKind, segno: u32, lsn: Lsn) -> Result { + // fetch directory listing + let key = slru_dir_to_key(kind); + let buf = self.tline.get(key, lsn)?; + let dir = SlruSegmentDirectory::des(&buf)?; + + let exists = dir.segments.get(&segno).is_some(); + Ok(exists) + } + + /// Get a list of SLRU segments + pub fn list_slru_segments(&self, kind: SlruKind, lsn: Lsn) -> Result> { + // fetch directory entry + let key = slru_dir_to_key(kind); + + let buf = self.tline.get(key, lsn)?; + let dir = SlruSegmentDirectory::des(&buf)?; + + Ok(dir.segments) + } + + pub fn get_relmap_file(&self, spcnode: Oid, dbnode: Oid, lsn: Lsn) -> Result { + let key = relmap_file_key(spcnode, dbnode); + + let buf = self.tline.get(key, lsn)?; + Ok(buf) + } + + pub fn list_dbdirs(&self, lsn: Lsn) -> Result> { + // fetch directory entry + let buf = self.tline.get(DBDIR_KEY, lsn)?; + let dir = DbDirectory::des(&buf)?; + + Ok(dir.dbdirs) + } + + pub fn get_twophase_file(&self, xid: TransactionId, lsn: Lsn) -> Result { + let key = twophase_file_key(xid); + let buf = self.tline.get(key, lsn)?; + Ok(buf) + } + + pub fn list_twophase_files(&self, lsn: Lsn) -> Result> { + // fetch directory entry + let buf = self.tline.get(TWOPHASEDIR_KEY, lsn)?; + let dir = TwoPhaseDirectory::des(&buf)?; + + Ok(dir.xids) + } + + pub fn get_control_file(&self, lsn: Lsn) -> Result { + self.tline.get(CONTROLFILE_KEY, lsn) + } + + pub fn get_checkpoint(&self, lsn: Lsn) -> Result { + self.tline.get(CHECKPOINT_KEY, lsn) + } + + /// Get the LSN of the last ingested WAL record. + /// + /// This is just a convenience wrapper that calls through to the underlying + /// repository. + pub fn get_last_record_lsn(&self) -> Lsn { + self.tline.get_last_record_lsn() + } + + /// Check that it is valid to request operations with that lsn. + /// + /// This is just a convenience wrapper that calls through to the underlying + /// repository. + pub fn check_lsn_is_in_scope( + &self, + lsn: Lsn, + latest_gc_cutoff_lsn: &RwLockReadGuard, + ) -> Result<()> { + self.tline.check_lsn_is_in_scope(lsn, latest_gc_cutoff_lsn) + } + + /// Retrieve current logical size of the timeline + /// + /// NOTE: counted incrementally, includes ancestors, + pub fn get_current_logical_size(&self) -> usize { + let current_logical_size = self.current_logical_size.load(Ordering::Acquire); + match usize::try_from(current_logical_size) { + Ok(sz) => sz, + Err(_) => { + error!( + "current_logical_size is out of range: {}", + current_logical_size + ); + 0 + } + } + } + + /// Does the same as get_current_logical_size but counted on demand. + /// Used to initialize the logical size tracking on startup. + /// + /// Only relation blocks are counted currently. That excludes metadata, + /// SLRUs, twophase files etc. + pub fn get_current_logical_size_non_incremental(&self, lsn: Lsn) -> Result { + // Fetch list of database dirs and iterate them + let buf = self.tline.get(DBDIR_KEY, lsn)?; + let dbdir = DbDirectory::des(&buf)?; + + let mut total_size: usize = 0; + for (spcnode, dbnode) in dbdir.dbdirs.keys() { + for rel in self.list_rels(*spcnode, *dbnode, lsn)? { + let relsize_key = rel_size_to_key(rel); + let mut buf = self.tline.get(relsize_key, lsn)?; + let relsize = buf.get_u32_le(); + + total_size += relsize as usize; + } + } + Ok(total_size * pg_constants::BLCKSZ as usize) + } + + /// + /// Get a KeySpace that covers all the Keys that are in use at the given LSN. + /// Anything that's not listed maybe removed from the underlying storage (from + /// that LSN forwards). + fn collect_keyspace(&self, lsn: Lsn) -> Result { + // Iterate through key ranges, greedily packing them into partitions + let mut result = KeySpaceAccum::new(); + + // The dbdir metadata always exists + result.add_key(DBDIR_KEY); + + // Fetch list of database dirs and iterate them + let buf = self.tline.get(DBDIR_KEY, lsn)?; + let dbdir = DbDirectory::des(&buf)?; + + let mut dbs: Vec<(Oid, Oid)> = dbdir.dbdirs.keys().cloned().collect(); + dbs.sort_unstable(); + for (spcnode, dbnode) in dbs { + result.add_key(relmap_file_key(spcnode, dbnode)); + result.add_key(rel_dir_to_key(spcnode, dbnode)); + + let mut rels: Vec = self + .list_rels(spcnode, dbnode, lsn)? + .iter() + .cloned() + .collect(); + rels.sort_unstable(); + for rel in rels { + let relsize_key = rel_size_to_key(rel); + let mut buf = self.tline.get(relsize_key, lsn)?; + let relsize = buf.get_u32_le(); + + result.add_range(rel_block_to_key(rel, 0)..rel_block_to_key(rel, relsize)); + result.add_key(relsize_key); + } + } + + // Iterate SLRUs next + for kind in [ + SlruKind::Clog, + SlruKind::MultiXactMembers, + SlruKind::MultiXactOffsets, + ] { + let slrudir_key = slru_dir_to_key(kind); + result.add_key(slrudir_key); + let buf = self.tline.get(slrudir_key, lsn)?; + let dir = SlruSegmentDirectory::des(&buf)?; + let mut segments: Vec = dir.segments.iter().cloned().collect(); + segments.sort_unstable(); + for segno in segments { + let segsize_key = slru_segment_size_to_key(kind, segno); + let mut buf = self.tline.get(segsize_key, lsn)?; + let segsize = buf.get_u32_le(); + + result.add_range( + slru_block_to_key(kind, segno, 0)..slru_block_to_key(kind, segno, segsize), + ); + result.add_key(segsize_key); + } + } + + // Then pg_twophase + result.add_key(TWOPHASEDIR_KEY); + let buf = self.tline.get(TWOPHASEDIR_KEY, lsn)?; + let twophase_dir = TwoPhaseDirectory::des(&buf)?; + let mut xids: Vec = twophase_dir.xids.iter().cloned().collect(); + xids.sort_unstable(); + for xid in xids { + result.add_key(twophase_file_key(xid)); + } + + result.add_key(CONTROLFILE_KEY); + result.add_key(CHECKPOINT_KEY); + + Ok(result.to_keyspace()) + } +} + +/// DatadirModification represents an operation to ingest an atomic set of +/// updates to the repository. It is created by the 'begin_record' +/// function. It is called for each WAL record, so that all the modifications +/// by a one WAL record appear atomic. +pub struct DatadirModification<'a, R: Repository> { + /// The timeline this modification applies to. You can access this to + /// read the state, but note that any pending updates are *not* reflected + /// in the state in 'tline' yet. + pub tline: &'a DatadirTimeline, + + lsn: Lsn, + + // The modifications are not applied directly to the underyling key-value store. + // The put-functions add the modifications here, and they are flushed to the + // underlying key-value store by the 'finish' function. + pending_updates: HashMap, + pending_deletions: Vec>, + pending_nblocks: isize, +} + +impl<'a, R: Repository> DatadirModification<'a, R> { + /// Initialize a completely new repository. + /// + /// This inserts the directory metadata entries that are assumed to + /// always exist. + pub fn init_empty(&mut self) -> Result<()> { + let buf = DbDirectory::ser(&DbDirectory { + dbdirs: HashMap::new(), + })?; + self.put(DBDIR_KEY, Value::Image(buf.into())); + + let buf = TwoPhaseDirectory::ser(&TwoPhaseDirectory { + xids: HashSet::new(), + })?; + self.put(TWOPHASEDIR_KEY, Value::Image(buf.into())); + + let buf: Bytes = SlruSegmentDirectory::ser(&SlruSegmentDirectory::default())?.into(); + let empty_dir = Value::Image(buf); + self.put(slru_dir_to_key(SlruKind::Clog), empty_dir.clone()); + self.put( + slru_dir_to_key(SlruKind::MultiXactMembers), + empty_dir.clone(), + ); + self.put(slru_dir_to_key(SlruKind::MultiXactOffsets), empty_dir); + + Ok(()) + } + + /// Put a new page version that can be constructed from a WAL record + /// + /// NOTE: this will *not* implicitly extend the relation, if the page is beyond the + /// current end-of-file. It's up to the caller to check that the relation size + /// matches the blocks inserted! + pub fn put_rel_wal_record( + &mut self, + rel: RelTag, + blknum: BlockNumber, + rec: ZenithWalRecord, + ) -> Result<()> { + ensure!(rel.relnode != 0, "invalid relnode"); + self.put(rel_block_to_key(rel, blknum), Value::WalRecord(rec)); + Ok(()) + } + + // Same, but for an SLRU. + pub fn put_slru_wal_record( + &mut self, + kind: SlruKind, + segno: u32, + blknum: BlockNumber, + rec: ZenithWalRecord, + ) -> Result<()> { + self.put( + slru_block_to_key(kind, segno, blknum), + Value::WalRecord(rec), + ); + Ok(()) + } + + /// Like put_wal_record, but with ready-made image of the page. + pub fn put_rel_page_image( + &mut self, + rel: RelTag, + blknum: BlockNumber, + img: Bytes, + ) -> Result<()> { + ensure!(rel.relnode != 0, "invalid relnode"); + self.put(rel_block_to_key(rel, blknum), Value::Image(img)); + Ok(()) + } + + pub fn put_slru_page_image( + &mut self, + kind: SlruKind, + segno: u32, + blknum: BlockNumber, + img: Bytes, + ) -> Result<()> { + self.put(slru_block_to_key(kind, segno, blknum), Value::Image(img)); + Ok(()) + } + + /// Store a relmapper file (pg_filenode.map) in the repository + pub fn put_relmap_file(&mut self, spcnode: Oid, dbnode: Oid, img: Bytes) -> Result<()> { + // Add it to the directory (if it doesn't exist already) + let buf = self.get(DBDIR_KEY)?; + let mut dbdir = DbDirectory::des(&buf)?; + + let r = dbdir.dbdirs.insert((spcnode, dbnode), true); + if r == None || r == Some(false) { + // The dbdir entry didn't exist, or it contained a + // 'false'. The 'insert' call already updated it with + // 'true', now write the updated 'dbdirs' map back. + let buf = DbDirectory::ser(&dbdir)?; + self.put(DBDIR_KEY, Value::Image(buf.into())); + } + if r == None { + // Create RelDirectory + let buf = RelDirectory::ser(&RelDirectory { + rels: HashSet::new(), + })?; + self.put( + rel_dir_to_key(spcnode, dbnode), + Value::Image(Bytes::from(buf)), + ); + } + + self.put(relmap_file_key(spcnode, dbnode), Value::Image(img)); + Ok(()) + } + + pub fn put_twophase_file(&mut self, xid: TransactionId, img: Bytes) -> Result<()> { + // Add it to the directory entry + let buf = self.get(TWOPHASEDIR_KEY)?; + let mut dir = TwoPhaseDirectory::des(&buf)?; + if !dir.xids.insert(xid) { + bail!("twophase file for xid {} already exists", xid); + } + self.put( + TWOPHASEDIR_KEY, + Value::Image(Bytes::from(TwoPhaseDirectory::ser(&dir)?)), + ); + + self.put(twophase_file_key(xid), Value::Image(img)); + Ok(()) + } + + pub fn put_control_file(&mut self, img: Bytes) -> Result<()> { + self.put(CONTROLFILE_KEY, Value::Image(img)); + Ok(()) + } + + pub fn put_checkpoint(&mut self, img: Bytes) -> Result<()> { + self.put(CHECKPOINT_KEY, Value::Image(img)); + Ok(()) + } + + pub fn drop_dbdir(&mut self, spcnode: Oid, dbnode: Oid) -> Result<()> { + // Remove entry from dbdir + let buf = self.get(DBDIR_KEY)?; + let mut dir = DbDirectory::des(&buf)?; + if dir.dbdirs.remove(&(spcnode, dbnode)).is_some() { + let buf = DbDirectory::ser(&dir)?; + self.put(DBDIR_KEY, Value::Image(buf.into())); + } else { + warn!( + "dropped dbdir for spcnode {} dbnode {} did not exist in db directory", + spcnode, dbnode + ); + } + + // FIXME: update pending_nblocks + + // Delete all relations and metadata files for the spcnode/dnode + self.delete(dbdir_key_range(spcnode, dbnode)); + Ok(()) + } + + /// Create a relation fork. + /// + /// 'nblocks' is the initial size. + pub fn put_rel_creation(&mut self, rel: RelTag, nblocks: BlockNumber) -> Result<()> { + ensure!(rel.relnode != 0, "invalid relnode"); + // It's possible that this is the first rel for this db in this + // tablespace. Create the reldir entry for it if so. + let mut dbdir = DbDirectory::des(&self.get(DBDIR_KEY)?)?; + let rel_dir_key = rel_dir_to_key(rel.spcnode, rel.dbnode); + let mut rel_dir = if dbdir.dbdirs.get(&(rel.spcnode, rel.dbnode)).is_none() { + // Didn't exist. Update dbdir + dbdir.dbdirs.insert((rel.spcnode, rel.dbnode), false); + let buf = DbDirectory::ser(&dbdir)?; + self.put(DBDIR_KEY, Value::Image(buf.into())); + + // and create the RelDirectory + RelDirectory::default() + } else { + // reldir already exists, fetch it + RelDirectory::des(&self.get(rel_dir_key)?)? + }; + + // Add the new relation to the rel directory entry, and write it back + if !rel_dir.rels.insert((rel.relnode, rel.forknum)) { + bail!("rel {} already exists", rel); + } + self.put( + rel_dir_key, + Value::Image(Bytes::from(RelDirectory::ser(&rel_dir)?)), + ); + + // Put size + let size_key = rel_size_to_key(rel); + let buf = nblocks.to_le_bytes(); + self.put(size_key, Value::Image(Bytes::from(buf.to_vec()))); + + self.pending_nblocks += nblocks as isize; + + // Even if nblocks > 0, we don't insert any actual blocks here. That's up to the + // caller. + + Ok(()) + } + + /// Truncate relation + pub fn put_rel_truncation(&mut self, rel: RelTag, nblocks: BlockNumber) -> Result<()> { + ensure!(rel.relnode != 0, "invalid relnode"); + let size_key = rel_size_to_key(rel); + + // Fetch the old size first + let old_size = self.get(size_key)?.get_u32_le(); + + // Update the entry with the new size. + let buf = nblocks.to_le_bytes(); + self.put(size_key, Value::Image(Bytes::from(buf.to_vec()))); + + // Update logical database size. + self.pending_nblocks -= old_size as isize - nblocks as isize; + Ok(()) + } + + /// Extend relation + pub fn put_rel_extend(&mut self, rel: RelTag, nblocks: BlockNumber) -> Result<()> { + ensure!(rel.relnode != 0, "invalid relnode"); + + // Put size + let size_key = rel_size_to_key(rel); + let old_size = self.get(size_key)?.get_u32_le(); + + let buf = nblocks.to_le_bytes(); + self.put(size_key, Value::Image(Bytes::from(buf.to_vec()))); + + self.pending_nblocks += nblocks as isize - old_size as isize; + Ok(()) + } + + /// Drop a relation. + pub fn put_rel_drop(&mut self, rel: RelTag) -> Result<()> { + ensure!(rel.relnode != 0, "invalid relnode"); + + // Remove it from the directory entry + let dir_key = rel_dir_to_key(rel.spcnode, rel.dbnode); + let buf = self.get(dir_key)?; + let mut dir = RelDirectory::des(&buf)?; + + if dir.rels.remove(&(rel.relnode, rel.forknum)) { + self.put(dir_key, Value::Image(Bytes::from(RelDirectory::ser(&dir)?))); + } else { + warn!("dropped rel {} did not exist in rel directory", rel); + } + + // update logical size + let size_key = rel_size_to_key(rel); + let old_size = self.get(size_key)?.get_u32_le(); + self.pending_nblocks -= old_size as isize; + + // Delete size entry, as well as all blocks + self.delete(rel_key_range(rel)); + + Ok(()) + } + + pub fn put_slru_segment_creation( + &mut self, + kind: SlruKind, + segno: u32, + nblocks: BlockNumber, + ) -> Result<()> { + // Add it to the directory entry + let dir_key = slru_dir_to_key(kind); + let buf = self.get(dir_key)?; + let mut dir = SlruSegmentDirectory::des(&buf)?; + + if !dir.segments.insert(segno) { + bail!("slru segment {:?}/{} already exists", kind, segno); + } + self.put( + dir_key, + Value::Image(Bytes::from(SlruSegmentDirectory::ser(&dir)?)), + ); + + // Put size + let size_key = slru_segment_size_to_key(kind, segno); + let buf = nblocks.to_le_bytes(); + self.put(size_key, Value::Image(Bytes::from(buf.to_vec()))); + + // even if nblocks > 0, we don't insert any actual blocks here + + Ok(()) + } + + /// Extend SLRU segment + pub fn put_slru_extend( + &mut self, + kind: SlruKind, + segno: u32, + nblocks: BlockNumber, + ) -> Result<()> { + // Put size + let size_key = slru_segment_size_to_key(kind, segno); + let buf = nblocks.to_le_bytes(); + self.put(size_key, Value::Image(Bytes::from(buf.to_vec()))); + Ok(()) + } + + /// This method is used for marking truncated SLRU files + pub fn drop_slru_segment(&mut self, kind: SlruKind, segno: u32) -> Result<()> { + // Remove it from the directory entry + let dir_key = slru_dir_to_key(kind); + let buf = self.get(dir_key)?; + let mut dir = SlruSegmentDirectory::des(&buf)?; + + if !dir.segments.remove(&segno) { + warn!("slru segment {:?}/{} does not exist", kind, segno); + } + self.put( + dir_key, + Value::Image(Bytes::from(SlruSegmentDirectory::ser(&dir)?)), + ); + + // Delete size entry, as well as all blocks + self.delete(slru_segment_key_range(kind, segno)); + + Ok(()) + } + + /// Drop a relmapper file (pg_filenode.map) + pub fn drop_relmap_file(&mut self, _spcnode: Oid, _dbnode: Oid) -> Result<()> { + // TODO + Ok(()) + } + + /// This method is used for marking truncated SLRU files + pub fn drop_twophase_file(&mut self, xid: TransactionId) -> Result<()> { + // Remove it from the directory entry + let buf = self.get(TWOPHASEDIR_KEY)?; + let mut dir = TwoPhaseDirectory::des(&buf)?; + + if !dir.xids.remove(&xid) { + warn!("twophase file for xid {} does not exist", xid); + } + self.put( + TWOPHASEDIR_KEY, + Value::Image(Bytes::from(TwoPhaseDirectory::ser(&dir)?)), + ); + + // Delete it + self.delete(twophase_key_range(xid)); + + Ok(()) + } + + /// + /// Finish this atomic update, writing all the updated keys to the + /// underlying timeline. + /// + pub fn commit(self) -> Result<()> { + let writer = self.tline.tline.writer(); + + let last_partitioning = self.tline.last_partitioning.load(); + let pending_nblocks = self.pending_nblocks; + + for (key, value) in self.pending_updates { + writer.put(key, self.lsn, value)?; + } + for key_range in self.pending_deletions { + writer.delete(key_range.clone(), self.lsn)?; + } + + writer.finish_write(self.lsn); + + if last_partitioning == Lsn(0) + || self.lsn.0 - last_partitioning.0 > self.tline.repartition_threshold + { + let keyspace = self.tline.collect_keyspace(self.lsn)?; + let partitioning = keyspace.partition(TARGET_FILE_SIZE_BYTES); + self.tline.tline.hint_partitioning(partitioning, self.lsn)?; + self.tline.last_partitioning.store(self.lsn); + } + + if pending_nblocks != 0 { + self.tline.current_logical_size.fetch_add( + pending_nblocks * pg_constants::BLCKSZ as isize, + Ordering::SeqCst, + ); + } + + Ok(()) + } + + // Internal helper functions to batch the modifications + + fn get(&self, key: Key) -> Result { + // Have we already updated the same key? Read the pending updated + // version in that case. + // + // Note: we don't check pending_deletions. It is an error to request a + // value that has been removed, deletion only avoids leaking storage. + if let Some(value) = self.pending_updates.get(&key) { + if let Value::Image(img) = value { + Ok(img.clone()) + } else { + // Currently, we never need to read back a WAL record that we + // inserted in the same "transaction". All the metadata updates + // work directly with Images, and we never need to read actual + // data pages. We could handle this if we had to, by calling + // the walredo manager, but let's keep it simple for now. + bail!("unexpected pending WAL record"); + } + } else { + let last_lsn = self.tline.get_last_record_lsn(); + self.tline.tline.get(key, last_lsn) + } + } + + fn put(&mut self, key: Key, val: Value) { + self.pending_updates.insert(key, val); + } + + fn delete(&mut self, key_range: Range) { + trace!("DELETE {}-{}", key_range.start, key_range.end); + self.pending_deletions.push(key_range); + } +} + +//--- Metadata structs stored in key-value pairs in the repository. + +#[derive(Debug, Serialize, Deserialize)] +struct DbDirectory { + // (spcnode, dbnode) -> (do relmapper and PG_VERSION files exist) + dbdirs: HashMap<(Oid, Oid), bool>, +} + +#[derive(Debug, Serialize, Deserialize)] +struct TwoPhaseDirectory { + xids: HashSet, +} + +#[derive(Debug, Serialize, Deserialize, Default)] +struct RelDirectory { + // Set of relations that exist. (relfilenode, forknum) + // + // TODO: Store it as a btree or radix tree or something else that spans multiple + // key-value pairs, if you have a lot of relations + rels: HashSet<(Oid, u8)>, +} + +#[derive(Debug, Serialize, Deserialize)] +struct RelSizeEntry { + nblocks: u32, +} + +#[derive(Debug, Serialize, Deserialize, Default)] +struct SlruSegmentDirectory { + // Set of SLRU segments that exist. + segments: HashSet, +} + +static ZERO_PAGE: Bytes = Bytes::from_static(&[0u8; pg_constants::BLCKSZ as usize]); + +// Layout of the Key address space +// +// The Key struct, used to address the underlying key-value store, consists of +// 18 bytes, split into six fields. See 'Key' in repository.rs. We need to map +// all the data and metadata keys into those 18 bytes. +// +// Principles for the mapping: +// +// - Things that are often accessed or modified together, should be close to +// each other in the key space. For example, if a relation is extended by one +// block, we create a new key-value pair for the block data, and update the +// relation size entry. Because of that, the RelSize key comes after all the +// RelBlocks of a relation: the RelSize and the last RelBlock are always next +// to each other. +// +// The key space is divided into four major sections, identified by the first +// byte, and the form a hierarchy: +// +// 00 Relation data and metadata +// +// DbDir () -> (dbnode, spcnode) +// Filenodemap +// RelDir -> relnode forknum +// RelBlocks +// RelSize +// +// 01 SLRUs +// +// SlruDir kind +// SlruSegBlocks segno +// SlruSegSize +// +// 02 pg_twophase +// +// 03 misc +// controlfile +// checkpoint +// +// Below is a full list of the keyspace allocation: +// +// DbDir: +// 00 00000000 00000000 00000000 00 00000000 +// +// Filenodemap: +// 00 SPCNODE DBNODE 00000000 00 00000000 +// +// RelDir: +// 00 SPCNODE DBNODE 00000000 00 00000001 (Postgres never uses relfilenode 0) +// +// RelBlock: +// 00 SPCNODE DBNODE RELNODE FORK BLKNUM +// +// RelSize: +// 00 SPCNODE DBNODE RELNODE FORK FFFFFFFF +// +// SlruDir: +// 01 kind 00000000 00000000 00 00000000 +// +// SlruSegBlock: +// 01 kind 00000001 SEGNO 00 BLKNUM +// +// SlruSegSize: +// 01 kind 00000001 SEGNO 00 FFFFFFFF +// +// TwoPhaseDir: +// 02 00000000 00000000 00000000 00 00000000 +// +// TwoPhaseFile: +// 02 00000000 00000000 00000000 00 XID +// +// ControlFile: +// 03 00000000 00000000 00000000 00 00000000 +// +// Checkpoint: +// 03 00000000 00000000 00000000 00 00000001 + +//-- Section 01: relation data and metadata + +const DBDIR_KEY: Key = Key { + field1: 0x00, + field2: 0, + field3: 0, + field4: 0, + field5: 0, + field6: 0, +}; + +fn dbdir_key_range(spcnode: Oid, dbnode: Oid) -> Range { + Key { + field1: 0x00, + field2: spcnode, + field3: dbnode, + field4: 0, + field5: 0, + field6: 0, + }..Key { + field1: 0x00, + field2: spcnode, + field3: dbnode, + field4: 0xffffffff, + field5: 0xff, + field6: 0xffffffff, + } +} + +fn relmap_file_key(spcnode: Oid, dbnode: Oid) -> Key { + Key { + field1: 0x00, + field2: spcnode, + field3: dbnode, + field4: 0, + field5: 0, + field6: 0, + } +} + +fn rel_dir_to_key(spcnode: Oid, dbnode: Oid) -> Key { + Key { + field1: 0x00, + field2: spcnode, + field3: dbnode, + field4: 0, + field5: 0, + field6: 1, + } +} + +fn rel_block_to_key(rel: RelTag, blknum: BlockNumber) -> Key { + Key { + field1: 0x00, + field2: rel.spcnode, + field3: rel.dbnode, + field4: rel.relnode, + field5: rel.forknum, + field6: blknum, + } +} + +fn rel_size_to_key(rel: RelTag) -> Key { + Key { + field1: 0x00, + field2: rel.spcnode, + field3: rel.dbnode, + field4: rel.relnode, + field5: rel.forknum, + field6: 0xffffffff, + } +} + +fn rel_key_range(rel: RelTag) -> Range { + Key { + field1: 0x00, + field2: rel.spcnode, + field3: rel.dbnode, + field4: rel.relnode, + field5: rel.forknum, + field6: 0, + }..Key { + field1: 0x00, + field2: rel.spcnode, + field3: rel.dbnode, + field4: rel.relnode, + field5: rel.forknum + 1, + field6: 0, + } +} + +//-- Section 02: SLRUs + +fn slru_dir_to_key(kind: SlruKind) -> Key { + Key { + field1: 0x01, + field2: match kind { + SlruKind::Clog => 0x00, + SlruKind::MultiXactMembers => 0x01, + SlruKind::MultiXactOffsets => 0x02, + }, + field3: 0, + field4: 0, + field5: 0, + field6: 0, + } +} + +fn slru_block_to_key(kind: SlruKind, segno: u32, blknum: BlockNumber) -> Key { + Key { + field1: 0x01, + field2: match kind { + SlruKind::Clog => 0x00, + SlruKind::MultiXactMembers => 0x01, + SlruKind::MultiXactOffsets => 0x02, + }, + field3: 1, + field4: segno, + field5: 0, + field6: blknum, + } +} + +fn slru_segment_size_to_key(kind: SlruKind, segno: u32) -> Key { + Key { + field1: 0x01, + field2: match kind { + SlruKind::Clog => 0x00, + SlruKind::MultiXactMembers => 0x01, + SlruKind::MultiXactOffsets => 0x02, + }, + field3: 1, + field4: segno, + field5: 0, + field6: 0xffffffff, + } +} + +fn slru_segment_key_range(kind: SlruKind, segno: u32) -> Range { + let field2 = match kind { + SlruKind::Clog => 0x00, + SlruKind::MultiXactMembers => 0x01, + SlruKind::MultiXactOffsets => 0x02, + }; + + Key { + field1: 0x01, + field2, + field3: segno, + field4: 0, + field5: 0, + field6: 0, + }..Key { + field1: 0x01, + field2, + field3: segno, + field4: 0, + field5: 1, + field6: 0, + } +} + +//-- Section 03: pg_twophase + +const TWOPHASEDIR_KEY: Key = Key { + field1: 0x02, + field2: 0, + field3: 0, + field4: 0, + field5: 0, + field6: 0, +}; + +fn twophase_file_key(xid: TransactionId) -> Key { + Key { + field1: 0x02, + field2: 0, + field3: 0, + field4: 0, + field5: 0, + field6: xid, + } +} + +fn twophase_key_range(xid: TransactionId) -> Range { + let (next_xid, overflowed) = xid.overflowing_add(1); + + Key { + field1: 0x02, + field2: 0, + field3: 0, + field4: 0, + field5: 0, + field6: xid, + }..Key { + field1: 0x02, + field2: 0, + field3: 0, + field4: 0, + field5: if overflowed { 1 } else { 0 }, + field6: next_xid, + } +} + +//-- Section 03: Control file +const CONTROLFILE_KEY: Key = Key { + field1: 0x03, + field2: 0, + field3: 0, + field4: 0, + field5: 0, + field6: 0, +}; + +const CHECKPOINT_KEY: Key = Key { + field1: 0x03, + field2: 0, + field3: 0, + field4: 0, + field5: 0, + field6: 1, +}; + +// Reverse mappings for a few Keys. +// These are needed by WAL redo manager. + +pub fn key_to_rel_block(key: Key) -> Result<(RelTag, BlockNumber)> { + Ok(match key.field1 { + 0x00 => ( + RelTag { + spcnode: key.field2, + dbnode: key.field3, + relnode: key.field4, + forknum: key.field5, + }, + key.field6, + ), + _ => bail!("unexpected value kind 0x{:02x}", key.field1), + }) +} + +pub fn key_to_slru_block(key: Key) -> Result<(SlruKind, u32, BlockNumber)> { + Ok(match key.field1 { + 0x01 => { + let kind = match key.field2 { + 0x00 => SlruKind::Clog, + 0x01 => SlruKind::MultiXactMembers, + 0x02 => SlruKind::MultiXactOffsets, + _ => bail!("unrecognized slru kind 0x{:02x}", key.field2), + }; + let segno = key.field4; + let blknum = key.field6; + + (kind, segno, blknum) + } + _ => bail!("unexpected value kind 0x{:02x}", key.field1), + }) +} + +// +//-- Tests that should work the same with any Repository/Timeline implementation. +// + +#[cfg(test)] +pub fn create_test_timeline( + repo: R, + timeline_id: zenith_utils::zid::ZTimelineId, +) -> Result>> { + let tline = repo.create_empty_timeline(timeline_id, Lsn(8))?; + let tline = DatadirTimeline::new(tline, crate::layered_repository::tests::TEST_FILE_SIZE / 10); + let mut m = tline.begin_modification(Lsn(8)); + m.init_empty()?; + m.commit()?; + Ok(Arc::new(tline)) +} + +#[allow(clippy::bool_assert_comparison)] +#[cfg(test)] +mod tests { + //use super::repo_harness::*; + //use super::*; + + /* + fn assert_current_logical_size(timeline: &DatadirTimeline, lsn: Lsn) { + let incremental = timeline.get_current_logical_size(); + let non_incremental = timeline + .get_current_logical_size_non_incremental(lsn) + .unwrap(); + assert_eq!(incremental, non_incremental); + } + */ + + /* + /// + /// Test list_rels() function, with branches and dropped relations + /// + #[test] + fn test_list_rels_drop() -> Result<()> { + let repo = RepoHarness::create("test_list_rels_drop")?.load(); + let tline = create_empty_timeline(repo, TIMELINE_ID)?; + const TESTDB: u32 = 111; + + // Import initial dummy checkpoint record, otherwise the get_timeline() call + // after branching fails below + let mut writer = tline.begin_record(Lsn(0x10)); + writer.put_checkpoint(ZERO_CHECKPOINT.clone())?; + writer.finish()?; + + // Create a relation on the timeline + let mut writer = tline.begin_record(Lsn(0x20)); + writer.put_rel_page_image(TESTREL_A, 0, TEST_IMG("foo blk 0 at 2"))?; + writer.finish()?; + + let writer = tline.begin_record(Lsn(0x00)); + writer.finish()?; + + // Check that list_rels() lists it after LSN 2, but no before it + assert!(!tline.list_rels(0, TESTDB, Lsn(0x10))?.contains(&TESTREL_A)); + assert!(tline.list_rels(0, TESTDB, Lsn(0x20))?.contains(&TESTREL_A)); + assert!(tline.list_rels(0, TESTDB, Lsn(0x30))?.contains(&TESTREL_A)); + + // Create a branch, check that the relation is visible there + repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x30))?; + let newtline = match repo.get_timeline(NEW_TIMELINE_ID)?.local_timeline() { + Some(timeline) => timeline, + None => panic!("Should have a local timeline"), + }; + let newtline = DatadirTimelineImpl::new(newtline); + assert!(newtline + .list_rels(0, TESTDB, Lsn(0x30))? + .contains(&TESTREL_A)); + + // Drop it on the branch + let mut new_writer = newtline.begin_record(Lsn(0x40)); + new_writer.drop_relation(TESTREL_A)?; + new_writer.finish()?; + + // Check that it's no longer listed on the branch after the point where it was dropped + assert!(newtline + .list_rels(0, TESTDB, Lsn(0x30))? + .contains(&TESTREL_A)); + assert!(!newtline + .list_rels(0, TESTDB, Lsn(0x40))? + .contains(&TESTREL_A)); + + // Run checkpoint and garbage collection and check that it's still not visible + newtline.tline.checkpoint(CheckpointConfig::Forced)?; + repo.gc_iteration(Some(NEW_TIMELINE_ID), 0, true)?; + + assert!(!newtline + .list_rels(0, TESTDB, Lsn(0x40))? + .contains(&TESTREL_A)); + + Ok(()) + } + */ + + /* + #[test] + fn test_read_beyond_eof() -> Result<()> { + let repo = RepoHarness::create("test_read_beyond_eof")?.load(); + let tline = create_test_timeline(repo, TIMELINE_ID)?; + + make_some_layers(&tline, Lsn(0x20))?; + let mut writer = tline.begin_record(Lsn(0x60)); + walingest.put_rel_page_image( + &mut writer, + TESTREL_A, + 0, + TEST_IMG(&format!("foo blk 0 at {}", Lsn(0x60))), + )?; + writer.finish()?; + + // Test read before rel creation. Should error out. + assert!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x10)).is_err()); + + // Read block beyond end of relation at different points in time. + // These reads should fall into different delta, image, and in-memory layers. + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x20))?, ZERO_PAGE); + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x25))?, ZERO_PAGE); + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x30))?, ZERO_PAGE); + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x35))?, ZERO_PAGE); + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x40))?, ZERO_PAGE); + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x45))?, ZERO_PAGE); + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x50))?, ZERO_PAGE); + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x55))?, ZERO_PAGE); + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x60))?, ZERO_PAGE); + + // Test on an in-memory layer with no preceding layer + let mut writer = tline.begin_record(Lsn(0x70)); + walingest.put_rel_page_image( + &mut writer, + TESTREL_B, + 0, + TEST_IMG(&format!("foo blk 0 at {}", Lsn(0x70))), + )?; + writer.finish()?; + + assert_eq!(tline.get_rel_page_at_lsn(TESTREL_B, 1, Lsn(0x70))?, ZERO_PAGE); + + Ok(()) + } + */ +} diff --git a/pageserver/src/relish.rs b/pageserver/src/relish.rs deleted file mode 100644 index 9228829aef..0000000000 --- a/pageserver/src/relish.rs +++ /dev/null @@ -1,226 +0,0 @@ -//! -//! Zenith stores PostgreSQL relations, and some other files, in the -//! repository. The relations (i.e. tables and indexes) take up most -//! of the space in a typical installation, while the other files are -//! small. We call each relation and other file that is stored in the -//! repository a "relish". It comes from "rel"-ish, as in "kind of a -//! rel", because it covers relations as well as other things that are -//! not relations, but are treated similarly for the purposes of the -//! storage layer. -//! -//! This source file contains the definition of the RelishTag struct, -//! which uniquely identifies a relish. -//! -//! Relishes come in two flavors: blocky and non-blocky. Relations and -//! SLRUs are blocky, that is, they are divided into 8k blocks, and -//! the repository tracks their size. Other relishes are non-blocky: -//! the content of the whole relish is stored as one blob. Block -//! number must be passed as 0 for all operations on a non-blocky -//! relish. The one "block" that you store in a non-blocky relish can -//! have arbitrary size, but they are expected to be small, or you -//! will have performance issues. -//! -//! All relishes are versioned by LSN in the repository. -//! - -use serde::{Deserialize, Serialize}; -use std::fmt; - -use postgres_ffi::relfile_utils::forknumber_to_name; -use postgres_ffi::{Oid, TransactionId}; - -/// -/// RelishTag identifies one relish. -/// -#[derive(Debug, Clone, Copy, Hash, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)] -pub enum RelishTag { - // Relations correspond to PostgreSQL relation forks. Each - // PostgreSQL relation fork is considered a separate relish. - Relation(RelTag), - - // SLRUs include pg_clog, pg_multixact/members, and - // pg_multixact/offsets. There are other SLRUs in PostgreSQL, but - // they don't need to be stored permanently (e.g. pg_subtrans), - // or we do not support them in zenith yet (pg_commit_ts). - // - // These are currently never requested directly by the compute - // nodes, although in principle that would be possible. However, - // when a new compute node is created, these are included in the - // tarball that we send to the compute node to initialize the - // PostgreSQL data directory. - // - // Each SLRU segment in PostgreSQL is considered a separate - // relish. For example, pg_clog/0000, pg_clog/0001, and so forth. - // - // SLRU segments are divided into blocks, like relations. - Slru { slru: SlruKind, segno: u32 }, - - // Miscellaneous other files that need to be included in the - // tarball at compute node creation. These are non-blocky, and are - // expected to be small. - - // - // FileNodeMap represents PostgreSQL's 'pg_filenode.map' - // files. They are needed to map catalog table OIDs to filenode - // numbers. Usually the mapping is done by looking up a relation's - // 'relfilenode' field in the 'pg_class' system table, but that - // doesn't work for 'pg_class' itself and a few other such system - // relations. See PostgreSQL relmapper.c for details. - // - // Each database has a map file for its local mapped catalogs, - // and there is a separate map file for shared catalogs. - // - // These files are always 512 bytes long (although we don't check - // or care about that in the page server). - // - FileNodeMap { spcnode: Oid, dbnode: Oid }, - - // - // State files for prepared transactions (e.g pg_twophase/1234) - // - TwoPhase { xid: TransactionId }, - - // The control file, stored in global/pg_control - ControlFile, - - // Special entry that represents PostgreSQL checkpoint. It doesn't - // correspond to to any physical file in PostgreSQL, but we use it - // to track fields needed to restore the checkpoint data in the - // control file, when a compute node is created. - Checkpoint, -} - -impl RelishTag { - pub const fn is_blocky(&self) -> bool { - match self { - // These relishes work with blocks - RelishTag::Relation(_) | RelishTag::Slru { slru: _, segno: _ } => true, - - // and these don't - RelishTag::FileNodeMap { - spcnode: _, - dbnode: _, - } - | RelishTag::TwoPhase { xid: _ } - | RelishTag::ControlFile - | RelishTag::Checkpoint => false, - } - } - - // Physical relishes represent files and use - // RelationSizeEntry to track existing and dropped files. - // They can be both blocky and non-blocky. - pub const fn is_physical(&self) -> bool { - match self { - // These relishes represent physical files - RelishTag::Relation(_) - | RelishTag::Slru { .. } - | RelishTag::FileNodeMap { .. } - | RelishTag::TwoPhase { .. } => true, - - // and these don't - RelishTag::ControlFile | RelishTag::Checkpoint => false, - } - } - - // convenience function to check if this relish is a normal relation. - pub const fn is_relation(&self) -> bool { - matches!(self, RelishTag::Relation(_)) - } -} - -/// -/// Relation data file segment id throughout the Postgres cluster. -/// -/// Every data file in Postgres is uniquely identified by 4 numbers: -/// - relation id / node (`relnode`) -/// - database id (`dbnode`) -/// - tablespace id (`spcnode`), in short this is a unique id of a separate -/// directory to store data files. -/// - forknumber (`forknum`) is used to split different kinds of data of the same relation -/// between some set of files (`relnode`, `relnode_fsm`, `relnode_vm`). -/// -/// In native Postgres code `RelFileNode` structure and individual `ForkNumber` value -/// are used for the same purpose. -/// [See more related comments here](https:///github.com/postgres/postgres/blob/99c5852e20a0987eca1c38ba0c09329d4076b6a0/src/include/storage/relfilenode.h#L57). -/// -#[derive(Debug, PartialEq, Eq, PartialOrd, Hash, Ord, Clone, Copy, Serialize, Deserialize)] -pub struct RelTag { - pub forknum: u8, - pub spcnode: Oid, - pub dbnode: Oid, - pub relnode: Oid, -} - -/// Display RelTag in the same format that's used in most PostgreSQL debug messages: -/// -/// //[_fsm|_vm|_init] -/// -impl fmt::Display for RelTag { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - if let Some(forkname) = forknumber_to_name(self.forknum) { - write!( - f, - "{}/{}/{}_{}", - self.spcnode, self.dbnode, self.relnode, forkname - ) - } else { - write!(f, "{}/{}/{}", self.spcnode, self.dbnode, self.relnode) - } - } -} - -/// Display RelTag in the same format that's used in most PostgreSQL debug messages: -/// -/// //[_fsm|_vm|_init] -/// -impl fmt::Display for RelishTag { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - RelishTag::Relation(rel) => rel.fmt(f), - RelishTag::Slru { slru, segno } => { - // e.g. pg_clog/0001 - write!(f, "{}/{:04X}", slru.to_str(), segno) - } - RelishTag::FileNodeMap { spcnode, dbnode } => { - write!(f, "relmapper file for spc {} db {}", spcnode, dbnode) - } - RelishTag::TwoPhase { xid } => { - write!(f, "pg_twophase/{:08X}", xid) - } - RelishTag::ControlFile => { - write!(f, "control file") - } - RelishTag::Checkpoint => { - write!(f, "checkpoint") - } - } - } -} - -/// -/// Non-relation transaction status files (clog (a.k.a. pg_xact) and -/// pg_multixact) in Postgres are handled by SLRU (Simple LRU) buffer, -/// hence the name. -/// -/// These files are global for a postgres instance. -/// -/// These files are divided into segments, which are divided into -/// pages of the same BLCKSZ as used for relation files. -/// -#[derive(Debug, Clone, Copy, Hash, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)] -pub enum SlruKind { - Clog, - MultiXactMembers, - MultiXactOffsets, -} - -impl SlruKind { - pub fn to_str(&self) -> &'static str { - match self { - Self::Clog => "pg_xact", - Self::MultiXactMembers => "pg_multixact/members", - Self::MultiXactOffsets => "pg_multixact/offsets", - } - } -} diff --git a/pageserver/src/reltag.rs b/pageserver/src/reltag.rs new file mode 100644 index 0000000000..46ff468f2f --- /dev/null +++ b/pageserver/src/reltag.rs @@ -0,0 +1,105 @@ +use serde::{Deserialize, Serialize}; +use std::cmp::Ordering; +use std::fmt; + +use postgres_ffi::relfile_utils::forknumber_to_name; +use postgres_ffi::Oid; + +/// +/// Relation data file segment id throughout the Postgres cluster. +/// +/// Every data file in Postgres is uniquely identified by 4 numbers: +/// - relation id / node (`relnode`) +/// - database id (`dbnode`) +/// - tablespace id (`spcnode`), in short this is a unique id of a separate +/// directory to store data files. +/// - forknumber (`forknum`) is used to split different kinds of data of the same relation +/// between some set of files (`relnode`, `relnode_fsm`, `relnode_vm`). +/// +/// In native Postgres code `RelFileNode` structure and individual `ForkNumber` value +/// are used for the same purpose. +/// [See more related comments here](https:///github.com/postgres/postgres/blob/99c5852e20a0987eca1c38ba0c09329d4076b6a0/src/include/storage/relfilenode.h#L57). +/// +// FIXME: should move 'forknum' as last field to keep this consistent with Postgres. +// Then we could replace the custo Ord and PartialOrd implementations below with +// deriving them. +#[derive(Debug, PartialEq, Eq, Hash, Clone, Copy, Serialize, Deserialize)] +pub struct RelTag { + pub forknum: u8, + pub spcnode: Oid, + pub dbnode: Oid, + pub relnode: Oid, +} + +impl PartialOrd for RelTag { + fn partial_cmp(&self, other: &Self) -> Option { + Some(self.cmp(other)) + } +} + +impl Ord for RelTag { + fn cmp(&self, other: &Self) -> Ordering { + let mut cmp; + + cmp = self.spcnode.cmp(&other.spcnode); + if cmp != Ordering::Equal { + return cmp; + } + cmp = self.dbnode.cmp(&other.dbnode); + if cmp != Ordering::Equal { + return cmp; + } + cmp = self.relnode.cmp(&other.relnode); + if cmp != Ordering::Equal { + return cmp; + } + cmp = self.forknum.cmp(&other.forknum); + + cmp + } +} + +/// Display RelTag in the same format that's used in most PostgreSQL debug messages: +/// +/// //[_fsm|_vm|_init] +/// +impl fmt::Display for RelTag { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + if let Some(forkname) = forknumber_to_name(self.forknum) { + write!( + f, + "{}/{}/{}_{}", + self.spcnode, self.dbnode, self.relnode, forkname + ) + } else { + write!(f, "{}/{}/{}", self.spcnode, self.dbnode, self.relnode) + } + } +} + +/// +/// Non-relation transaction status files (clog (a.k.a. pg_xact) and +/// pg_multixact) in Postgres are handled by SLRU (Simple LRU) buffer, +/// hence the name. +/// +/// These files are global for a postgres instance. +/// +/// These files are divided into segments, which are divided into +/// pages of the same BLCKSZ as used for relation files. +/// +#[derive(Debug, Clone, Copy, Hash, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)] +pub enum SlruKind { + Clog, + MultiXactMembers, + MultiXactOffsets, +} + +impl SlruKind { + pub fn to_str(&self) -> &'static str { + match self { + Self::Clog => "pg_xact", + Self::MultiXactMembers => "pg_multixact/members", + Self::MultiXactOffsets => "pg_multixact/offsets", + } + } +} diff --git a/pageserver/src/remote_storage/README.md b/pageserver/src/remote_storage/README.md index 3c77275da8..339ddce866 100644 --- a/pageserver/src/remote_storage/README.md +++ b/pageserver/src/remote_storage/README.md @@ -17,7 +17,7 @@ This way, the backups are managed in background, not affecting directly other pa Current implementation * provides remote storage wrappers for AWS S3 and local FS * synchronizes the differences with local timelines and remote states as fast as possible -* uploads new relishes, frozen by pageserver checkpoint thread +* uploads new layer files * downloads and registers timelines, found on the remote storage, but missing locally, if those are requested somehow via pageserver (e.g. http api, gc) * uses compression when deals with files, for better S3 usage * maintains an index of what's stored remotely diff --git a/pageserver/src/remote_storage/local_fs.rs b/pageserver/src/remote_storage/local_fs.rs index 6cce127a7c..bac693c8d0 100644 --- a/pageserver/src/remote_storage/local_fs.rs +++ b/pageserver/src/remote_storage/local_fs.rs @@ -662,7 +662,7 @@ mod fs_tests { } async fn upload_dummy_file( - harness: &RepoHarness, + harness: &RepoHarness<'_>, storage: &LocalFs, name: &str, ) -> anyhow::Result { diff --git a/pageserver/src/remote_storage/storage_sync.rs b/pageserver/src/remote_storage/storage_sync.rs index 9fe2ab2847..ddd47ea981 100644 --- a/pageserver/src/remote_storage/storage_sync.rs +++ b/pageserver/src/remote_storage/storage_sync.rs @@ -27,7 +27,7 @@ //! it may schedule the download on such occasions. //! Then, the index is shared across pageserver under [`RemoteIndex`] guard to ensure proper synchronization. //! -//! The synchronization unit is an archive: a set of timeline files (or relishes) and a special metadata file, all compressed into a blob. +//! The synchronization unit is an archive: a set of layer files and a special metadata file, all compressed into a blob. //! Currently, there's no way to process an archive partially, if the archive processing fails, it has to be started from zero next time again. //! An archive contains set of files of a certain timeline, added during checkpoint(s) and the timeline metadata at that moment. //! The archive contains that metadata's `disk_consistent_lsn` in its name, to be able to restore partial index information from just a remote storage file list. @@ -281,7 +281,7 @@ impl SyncKind { /// Current checkpoint design assumes new files are added only, no deletions or amendment happens. #[derive(Debug, Clone)] pub struct NewCheckpoint { - /// Relish file paths in the pageserver workdir, that were added for the corresponding checkpoint. + /// layer file paths in the pageserver workdir, that were added for the corresponding checkpoint. layers: Vec, metadata: TimelineMetadata, } @@ -854,7 +854,7 @@ mod test_utils { #[track_caller] pub async fn ensure_correct_timeline_upload( - harness: &RepoHarness, + harness: &RepoHarness<'_>, remote_assets: Arc<(LocalFs, RemoteIndex)>, timeline_id: ZTimelineId, new_upload: NewCheckpoint, diff --git a/pageserver/src/remote_storage/storage_sync/compression.rs b/pageserver/src/remote_storage/storage_sync/compression.rs index ca245359bf..c5b041349a 100644 --- a/pageserver/src/remote_storage/storage_sync/compression.rs +++ b/pageserver/src/remote_storage/storage_sync/compression.rs @@ -10,7 +10,7 @@ //! Archiving is almost agnostic to timeline file types, with an exception of the metadata file, that's currently distinguished in the [un]compression code. //! The metadata file is treated separately when [de]compression is involved, to reduce the risk of corrupting the metadata file. //! When compressed, the metadata file is always required and stored as the last file in the archive stream. -//! When uncompressed, the metadata file gets naturally uncompressed last, to ensure that all other relishes are decompressed successfully first. +//! When uncompressed, the metadata file gets naturally uncompressed last, to ensure that all other layer files are decompressed successfully first. //! //! Archive structure: //! +----------------------------------------+ diff --git a/pageserver/src/remote_storage/storage_sync/index.rs b/pageserver/src/remote_storage/storage_sync/index.rs index d7bd1f1657..861b78fa3b 100644 --- a/pageserver/src/remote_storage/storage_sync/index.rs +++ b/pageserver/src/remote_storage/storage_sync/index.rs @@ -277,7 +277,7 @@ impl RemoteTimeline { .map(CheckpointArchive::disk_consistent_lsn) } - /// Lists all relish files in the given remote timeline. Omits the metadata file. + /// Lists all layer files in the given remote timeline. Omits the metadata file. pub fn stored_files(&self, timeline_dir: &Path) -> BTreeSet { self.timeline_files .values() diff --git a/pageserver/src/repository.rs b/pageserver/src/repository.rs index 36273e6d6c..b960e037be 100644 --- a/pageserver/src/repository.rs +++ b/pageserver/src/repository.rs @@ -1,22 +1,173 @@ +use crate::keyspace::KeyPartitioning; use crate::layered_repository::metadata::TimelineMetadata; -use crate::relish::*; use crate::remote_storage::RemoteIndex; -use crate::walrecord::MultiXactMember; +use crate::walrecord::ZenithWalRecord; use crate::CheckpointConfig; -use anyhow::Result; +use anyhow::{bail, Result}; use bytes::Bytes; -use postgres_ffi::{MultiXactId, MultiXactOffset, TransactionId}; use serde::{Deserialize, Serialize}; -use std::collections::HashSet; +use std::fmt; use std::fmt::Display; -use std::ops::{AddAssign, Deref}; +use std::ops::{AddAssign, Range}; use std::sync::{Arc, RwLockReadGuard}; use std::time::Duration; use zenith_utils::lsn::{Lsn, RecordLsn}; use zenith_utils::zid::ZTimelineId; -/// Block number within a relish. This matches PostgreSQL's BlockNumber type. -pub type BlockNumber = u32; +#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq, Ord, PartialOrd, Serialize, Deserialize)] +/// Key used in the Repository kv-store. +/// +/// The Repository treates this as an opaque struct, but see the code in pgdatadir_mapping.rs +/// for what we actually store in these fields. +pub struct Key { + pub field1: u8, + pub field2: u32, + pub field3: u32, + pub field4: u32, + pub field5: u8, + pub field6: u32, +} + +impl Key { + pub fn next(&self) -> Key { + self.add(1) + } + + pub fn add(&self, x: u32) -> Key { + let mut key = *self; + + let r = key.field6.overflowing_add(x); + key.field6 = r.0; + if r.1 { + let r = key.field5.overflowing_add(1); + key.field5 = r.0; + if r.1 { + let r = key.field4.overflowing_add(1); + key.field4 = r.0; + if r.1 { + let r = key.field3.overflowing_add(1); + key.field3 = r.0; + if r.1 { + let r = key.field2.overflowing_add(1); + key.field2 = r.0; + if r.1 { + let r = key.field1.overflowing_add(1); + key.field1 = r.0; + assert!(!r.1); + } + } + } + } + } + key + } + + pub fn from_array(b: [u8; 18]) -> Self { + Key { + field1: b[0], + field2: u32::from_be_bytes(b[1..5].try_into().unwrap()), + field3: u32::from_be_bytes(b[5..9].try_into().unwrap()), + field4: u32::from_be_bytes(b[9..13].try_into().unwrap()), + field5: b[13], + field6: u32::from_be_bytes(b[14..18].try_into().unwrap()), + } + } +} + +pub fn key_range_size(key_range: &Range) -> u32 { + let start = key_range.start; + let end = key_range.end; + + if end.field1 != start.field1 + || end.field2 != start.field2 + || end.field3 != start.field3 + || end.field4 != start.field4 + { + return u32::MAX; + } + + let start = (start.field5 as u64) << 32 | start.field6 as u64; + let end = (end.field5 as u64) << 32 | end.field6 as u64; + + let diff = end - start; + if diff > u32::MAX as u64 { + u32::MAX + } else { + diff as u32 + } +} + +pub fn singleton_range(key: Key) -> Range { + key..key.next() +} + +impl fmt::Display for Key { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!( + f, + "{:02X}{:08X}{:08X}{:08X}{:02X}{:08X}", + self.field1, self.field2, self.field3, self.field4, self.field5, self.field6 + ) + } +} + +impl Key { + pub const MIN: Key = Key { + field1: u8::MIN, + field2: u32::MIN, + field3: u32::MIN, + field4: u32::MIN, + field5: u8::MIN, + field6: u32::MIN, + }; + pub const MAX: Key = Key { + field1: u8::MAX, + field2: u32::MAX, + field3: u32::MAX, + field4: u32::MAX, + field5: u8::MAX, + field6: u32::MAX, + }; + + pub fn from_hex(s: &str) -> Result { + if s.len() != 36 { + bail!("parse error"); + } + Ok(Key { + field1: u8::from_str_radix(&s[0..2], 16)?, + field2: u32::from_str_radix(&s[2..10], 16)?, + field3: u32::from_str_radix(&s[10..18], 16)?, + field4: u32::from_str_radix(&s[18..26], 16)?, + field5: u8::from_str_radix(&s[26..28], 16)?, + field6: u32::from_str_radix(&s[28..36], 16)?, + }) + } +} + +/// A 'value' stored for a one Key. +#[derive(Debug, Clone, Serialize, Deserialize)] +pub enum Value { + /// An Image value contains a full copy of the value + Image(Bytes), + /// A WalRecord value contains a WAL record that needs to be + /// replayed get the full value. Replaying the WAL record + /// might need a previous version of the value (if will_init() + /// returns false), or it may be replayed stand-alone (true). + WalRecord(ZenithWalRecord), +} + +impl Value { + pub fn is_image(&self) -> bool { + matches!(self, Value::Image(_)) + } + + pub fn will_init(&self) -> bool { + match self { + Value::Image(_) => true, + Value::WalRecord(rec) => rec.will_init(), + } + } +} #[derive(Clone, Copy, Debug)] pub enum TimelineSyncStatusUpdate { @@ -37,6 +188,8 @@ impl Display for TimelineSyncStatusUpdate { /// A repository corresponds to one .zenith directory. One repository holds multiple /// timelines, forked off from the same initial call to 'initdb'. pub trait Repository: Send + Sync { + type Timeline: Timeline; + /// Updates timeline based on the `TimelineSyncStatusUpdate`, received from the remote storage synchronization. /// See [`crate::remote_storage`] for more details about the synchronization. fn apply_timeline_remote_sync_status_update( @@ -47,14 +200,14 @@ pub trait Repository: Send + Sync { /// Get Timeline handle for given zenith timeline ID. /// This function is idempotent. It doesnt change internal state in any way. - fn get_timeline(&self, timelineid: ZTimelineId) -> Option; + fn get_timeline(&self, timelineid: ZTimelineId) -> Option>; /// Get Timeline handle for locally available timeline. Load it into memory if it is not loaded. - fn get_timeline_load(&self, timelineid: ZTimelineId) -> Result>; + fn get_timeline_load(&self, timelineid: ZTimelineId) -> Result>; /// Lists timelines the repository contains. /// Up to repository's implementation to omit certain timelines that ar not considered ready for use. - fn list_timelines(&self) -> Vec<(ZTimelineId, RepositoryTimeline)>; + fn list_timelines(&self) -> Vec<(ZTimelineId, RepositoryTimeline)>; /// Create a new, empty timeline. The caller is responsible for loading data into it /// Initdb lsn is provided for timeline impl to be able to perform checks for some operations against it. @@ -62,11 +215,16 @@ pub trait Repository: Send + Sync { &self, timelineid: ZTimelineId, initdb_lsn: Lsn, - ) -> Result>; + ) -> Result>; /// Branch a timeline fn branch_timeline(&self, src: ZTimelineId, dst: ZTimelineId, start_lsn: Lsn) -> Result<()>; + /// Flush all data to disk. + /// + /// this is used at graceful shutdown. + fn checkpoint(&self) -> Result<()>; + /// perform one garbage collection iteration, removing old data files from disk. /// this function is periodically called by gc thread. /// also it can be explicitly requested through page server api 'do_gc' command. @@ -83,9 +241,9 @@ pub trait Repository: Send + Sync { checkpoint_before_gc: bool, ) -> Result; - /// perform one checkpoint iteration, flushing in-memory data on disk. - /// this function is periodically called by checkponter thread. - fn checkpoint_iteration(&self, cconf: CheckpointConfig) -> Result<()>; + /// perform one compaction iteration. + /// this function is periodically called by compactor thread. + fn compaction_iteration(&self) -> Result<()>; /// detaches locally available timeline by stopping all threads and removing all the data. fn detach_timeline(&self, timeline_id: ZTimelineId) -> Result<()>; @@ -95,10 +253,10 @@ pub trait Repository: Send + Sync { } /// A timeline, that belongs to the current repository. -pub enum RepositoryTimeline { +pub enum RepositoryTimeline { /// Timeline, with its files present locally in pageserver's working directory. /// Loaded into pageserver's memory and ready to be used. - Loaded(Arc), + Loaded(Arc), /// All the data is available locally, but not loaded into memory, so loading have to be done before actually using the timeline Unloaded { @@ -118,8 +276,8 @@ pub enum LocalTimelineState { Unloaded, } -impl<'a> From<&'a RepositoryTimeline> for LocalTimelineState { - fn from(local_timeline_entry: &'a RepositoryTimeline) -> Self { +impl<'a, T> From<&'a RepositoryTimeline> for LocalTimelineState { + fn from(local_timeline_entry: &'a RepositoryTimeline) -> Self { match local_timeline_entry { RepositoryTimeline::Loaded(_) => LocalTimelineState::Loaded, RepositoryTimeline::Unloaded { .. } => LocalTimelineState::Unloaded, @@ -132,42 +290,22 @@ impl<'a> From<&'a RepositoryTimeline> for LocalTimelineState { /// #[derive(Default)] pub struct GcResult { - pub ondisk_relfiles_total: u64, - pub ondisk_relfiles_needed_by_cutoff: u64, - pub ondisk_relfiles_needed_by_branches: u64, - pub ondisk_relfiles_not_updated: u64, - pub ondisk_relfiles_needed_as_tombstone: u64, - pub ondisk_relfiles_removed: u64, // # of layer files removed because they have been made obsolete by newer ondisk files. - pub ondisk_relfiles_dropped: u64, // # of layer files removed because the relation was dropped - - pub ondisk_nonrelfiles_total: u64, - pub ondisk_nonrelfiles_needed_by_cutoff: u64, - pub ondisk_nonrelfiles_needed_by_branches: u64, - pub ondisk_nonrelfiles_not_updated: u64, - pub ondisk_nonrelfiles_needed_as_tombstone: u64, - pub ondisk_nonrelfiles_removed: u64, // # of layer files removed because they have been made obsolete by newer ondisk files. - pub ondisk_nonrelfiles_dropped: u64, // # of layer files removed because the relation was dropped + pub layers_total: u64, + pub layers_needed_by_cutoff: u64, + pub layers_needed_by_branches: u64, + pub layers_not_updated: u64, + pub layers_removed: u64, // # of layer files removed because they have been made obsolete by newer ondisk files. pub elapsed: Duration, } impl AddAssign for GcResult { fn add_assign(&mut self, other: Self) { - self.ondisk_relfiles_total += other.ondisk_relfiles_total; - self.ondisk_relfiles_needed_by_cutoff += other.ondisk_relfiles_needed_by_cutoff; - self.ondisk_relfiles_needed_by_branches += other.ondisk_relfiles_needed_by_branches; - self.ondisk_relfiles_not_updated += other.ondisk_relfiles_not_updated; - self.ondisk_relfiles_needed_as_tombstone += other.ondisk_relfiles_needed_as_tombstone; - self.ondisk_relfiles_removed += other.ondisk_relfiles_removed; - self.ondisk_relfiles_dropped += other.ondisk_relfiles_dropped; - - self.ondisk_nonrelfiles_total += other.ondisk_nonrelfiles_total; - self.ondisk_nonrelfiles_needed_by_cutoff += other.ondisk_nonrelfiles_needed_by_cutoff; - self.ondisk_nonrelfiles_needed_by_branches += other.ondisk_nonrelfiles_needed_by_branches; - self.ondisk_nonrelfiles_not_updated += other.ondisk_nonrelfiles_not_updated; - self.ondisk_nonrelfiles_needed_as_tombstone += other.ondisk_nonrelfiles_needed_as_tombstone; - self.ondisk_nonrelfiles_removed += other.ondisk_nonrelfiles_removed; - self.ondisk_nonrelfiles_dropped += other.ondisk_nonrelfiles_dropped; + self.layers_total += other.layers_total; + self.layers_needed_by_cutoff += other.layers_needed_by_cutoff; + self.layers_needed_by_branches += other.layers_needed_by_branches; + self.layers_not_updated += other.layers_not_updated; + self.layers_removed += other.layers_removed; self.elapsed += other.elapsed; } @@ -190,23 +328,14 @@ pub trait Timeline: Send + Sync { fn get_latest_gc_cutoff_lsn(&self) -> RwLockReadGuard; /// Look up given page version. - fn get_page_at_lsn(&self, tag: RelishTag, blknum: BlockNumber, lsn: Lsn) -> Result; - - /// Get size of a relish - fn get_relish_size(&self, tag: RelishTag, lsn: Lsn) -> Result>; - - /// Does relation exist? - fn get_rel_exists(&self, tag: RelishTag, lsn: Lsn) -> Result; - - /// Get a list of all existing relations - /// Pass RelTag to get relation objects or None to get nonrels. - fn list_relishes(&self, tag: Option, lsn: Lsn) -> Result>; - - /// Get a list of all existing relations in given tablespace and database. - fn list_rels(&self, spcnode: u32, dbnode: u32, lsn: Lsn) -> Result>; - - /// Get a list of all existing non-relational objects - fn list_nonrels(&self, lsn: Lsn) -> Result>; + /// + /// NOTE: It is considerd an error to 'get' a key that doesn't exist. The abstraction + /// above this needs to store suitable metadata to track what data exists with + /// what keys, in separate metadata entries. If a non-existent key is requested, + /// the Repository implementation may incorrectly return a value from an ancestore + /// branch, for exampel, or waste a lot of cycles chasing the non-existing key. + /// + fn get(&self, key: Key, lsn: Lsn) -> Result; /// Get the ancestor's timeline id fn get_ancestor_timeline_id(&self) -> Option; @@ -219,7 +348,6 @@ pub trait Timeline: Send + Sync { // // These are called by the WAL receiver to digest WAL records. //------------------------------------------------------------------------------ - /// Atomically get both last and prev. fn get_last_record_rlsn(&self) -> RecordLsn; @@ -231,6 +359,10 @@ pub trait Timeline: Send + Sync { fn get_disk_consistent_lsn(&self) -> Lsn; /// Mutate the timeline with a [`TimelineWriter`]. + /// + /// FIXME: This ought to return &'a TimelineWriter, where TimelineWriter + /// is a generic type in this trait. But that doesn't currently work in + /// Rust: https://rust-lang.github.io/rfcs/1598-generic_associated_types.html fn writer<'a>(&'a self) -> Box; /// @@ -240,6 +372,19 @@ pub trait Timeline: Send + Sync { /// know anything about them here in the repository. fn checkpoint(&self, cconf: CheckpointConfig) -> Result<()>; + /// + /// Tell the implementation how the keyspace should be partitioned. + /// + /// FIXME: This is quite a hack. The code in pgdatadir_mapping.rs knows + /// which keys exist and what is the logical grouping of them. That's why + /// the code there (and in keyspace.rs) decides the partitioning, not the + /// layered_repository.rs implementation. That's a layering violation: + /// the Repository implementation ought to be responsible for the physical + /// layout, but currently it's more convenient to do it in pgdatadir_mapping.rs + /// rather than in layered_repository.rs. + /// + fn hint_partitioning(&self, partitioning: KeyPartitioning, lsn: Lsn) -> Result<()>; + /// /// Check that it is valid to request operations with that lsn. fn check_lsn_is_in_scope( @@ -247,107 +392,39 @@ pub trait Timeline: Send + Sync { lsn: Lsn, latest_gc_cutoff_lsn: &RwLockReadGuard, ) -> Result<()>; - - /// Retrieve current logical size of the timeline - /// - /// NOTE: counted incrementally, includes ancestors, - /// doesnt support TwoPhase relishes yet - fn get_current_logical_size(&self) -> usize; - - /// Does the same as get_current_logical_size but counted on demand. - /// Used in tests to ensure that incremental and non incremental variants match. - fn get_current_logical_size_non_incremental(&self, lsn: Lsn) -> Result; - - /// An escape hatch to allow "casting" a generic Timeline to LayeredTimeline. - fn upgrade_to_layered_timeline(&self) -> &crate::layered_repository::LayeredTimeline; } /// Various functions to mutate the timeline. // TODO Currently, Deref is used to allow easy access to read methods from this trait. // This is probably considered a bad practice in Rust and should be fixed eventually, // but will cause large code changes. -pub trait TimelineWriter: Deref { +pub trait TimelineWriter<'a> { /// Put a new page version that can be constructed from a WAL record /// /// This will implicitly extend the relation, if the page is beyond the /// current end-of-file. - fn put_wal_record( - &self, - lsn: Lsn, - tag: RelishTag, - blknum: BlockNumber, - rec: ZenithWalRecord, - ) -> Result<()>; + fn put(&self, key: Key, lsn: Lsn, value: Value) -> Result<()>; - /// Like put_wal_record, but with ready-made image of the page. - fn put_page_image( - &self, - tag: RelishTag, - blknum: BlockNumber, - lsn: Lsn, - img: Bytes, - ) -> Result<()>; + fn delete(&self, key_range: Range, lsn: Lsn) -> Result<()>; - /// Truncate relation - fn put_truncation(&self, rel: RelishTag, lsn: Lsn, nblocks: BlockNumber) -> Result<()>; - - /// This method is used for marking dropped relations and truncated SLRU files and aborted two phase records - fn drop_relish(&self, tag: RelishTag, lsn: Lsn) -> Result<()>; - - /// Track end of the latest digested WAL record. + /// Track the end of the latest digested WAL record. /// - /// Advance requires aligned LSN as an argument and would wake wait_lsn() callers. - /// Previous last record LSN is stored alongside the latest and can be read. - fn advance_last_record_lsn(&self, lsn: Lsn); -} - -/// Each update to a page is represented by a ZenithWalRecord. It can be a wrapper -/// around a PostgreSQL WAL record, or a custom zenith-specific "record". -#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)] -pub enum ZenithWalRecord { - /// Native PostgreSQL WAL record - Postgres { will_init: bool, rec: Bytes }, - - /// Clear bits in heap visibility map. ('flags' is bitmap of bits to clear) - ClearVisibilityMapFlags { - new_heap_blkno: Option, - old_heap_blkno: Option, - flags: u8, - }, - /// Mark transaction IDs as committed on a CLOG page - ClogSetCommitted { xids: Vec }, - /// Mark transaction IDs as aborted on a CLOG page - ClogSetAborted { xids: Vec }, - /// Extend multixact offsets SLRU - MultixactOffsetCreate { - mid: MultiXactId, - moff: MultiXactOffset, - }, - /// Extend multixact members SLRU. - MultixactMembersCreate { - moff: MultiXactOffset, - members: Vec, - }, -} - -impl ZenithWalRecord { - /// Does replaying this WAL record initialize the page from scratch, or does - /// it need to be applied over the previous image of the page? - pub fn will_init(&self) -> bool { - match self { - ZenithWalRecord::Postgres { will_init, rec: _ } => *will_init, - - // None of the special zenith record types currently initialize the page - _ => false, - } - } + /// Call this after you have finished writing all the WAL up to 'lsn'. + /// + /// 'lsn' must be aligned. This wakes up any wait_lsn() callers waiting for + /// the 'lsn' or anything older. The previous last record LSN is stored alongside + /// the latest and can be read. + fn finish_write(&self, lsn: Lsn); } #[cfg(test)] pub mod repo_harness { use bytes::BytesMut; + use lazy_static::lazy_static; + use std::sync::{Arc, RwLock, RwLockReadGuard, RwLockWriteGuard}; use std::{fs, path::PathBuf}; + use crate::RepositoryImpl; use crate::{ config::PageServerConf, layered_repository::LayeredRepository, @@ -368,18 +445,39 @@ pub mod repo_harness { pub fn TEST_IMG(s: &str) -> Bytes { let mut buf = BytesMut::new(); buf.extend_from_slice(s.as_bytes()); - buf.resize(8192, 0); + buf.resize(64, 0); buf.freeze() } - pub struct RepoHarness { - pub conf: &'static PageServerConf, - pub tenant_id: ZTenantId, + lazy_static! { + static ref LOCK: RwLock<()> = RwLock::new(()); } - impl RepoHarness { + pub struct RepoHarness<'a> { + pub conf: &'static PageServerConf, + pub tenant_id: ZTenantId, + + pub lock_guard: ( + Option>, + Option>, + ), + } + + impl<'a> RepoHarness<'a> { pub fn create(test_name: &'static str) -> Result { + Self::create_internal(test_name, false) + } + pub fn create_exclusive(test_name: &'static str) -> Result { + Self::create_internal(test_name, true) + } + fn create_internal(test_name: &'static str, exclusive: bool) -> Result { + let lock_guard = if exclusive { + (None, Some(LOCK.write().unwrap())) + } else { + (Some(LOCK.read().unwrap()), None) + }; + let repo_dir = PageServerConf::test_repo_dir(test_name); let _ = fs::remove_dir_all(&repo_dir); fs::create_dir_all(&repo_dir)?; @@ -393,23 +491,27 @@ pub mod repo_harness { fs::create_dir_all(conf.tenant_path(&tenant_id))?; fs::create_dir_all(conf.timelines_path(&tenant_id))?; - Ok(Self { conf, tenant_id }) + Ok(Self { + conf, + tenant_id, + lock_guard, + }) } - pub fn load(&self) -> Box { + pub fn load(&self) -> RepositoryImpl { self.try_load().expect("failed to load test repo") } - pub fn try_load(&self) -> Result> { + pub fn try_load(&self) -> Result { let walredo_mgr = Arc::new(TestRedoManager); - let repo = Box::new(LayeredRepository::new( + let repo = LayeredRepository::new( self.conf, walredo_mgr, self.tenant_id, RemoteIndex::empty(), false, - )); + ); // populate repo with locally available timelines for timeline_dir_entry in fs::read_dir(self.conf.timelines_path(&self.tenant_id)) .expect("should be able to read timelines dir") @@ -438,21 +540,19 @@ pub mod repo_harness { } // Mock WAL redo manager that doesn't do much - struct TestRedoManager; + pub struct TestRedoManager; impl WalRedoManager for TestRedoManager { fn request_redo( &self, - rel: RelishTag, - blknum: BlockNumber, + key: Key, lsn: Lsn, base_img: Option, records: Vec<(Lsn, ZenithWalRecord)>, ) -> Result { let s = format!( - "redo for {} blk {} to get to {}, with {} and {} records", - rel, - blknum, + "redo for {} to get to {}, with {} and {} records", + key, lsn, if base_img.is_some() { "base image" @@ -462,6 +562,7 @@ pub mod repo_harness { records.len() ); println!("{}", s); + Ok(TEST_IMG(&s)) } } @@ -475,411 +576,43 @@ pub mod repo_harness { mod tests { use super::repo_harness::*; use super::*; - use postgres_ffi::{pg_constants, xlog_utils::SIZEOF_CHECKPOINT}; - use std::fs; + //use postgres_ffi::{pg_constants, xlog_utils::SIZEOF_CHECKPOINT}; + //use std::sync::Arc; + use bytes::BytesMut; + use hex_literal::hex; + use lazy_static::lazy_static; - /// Arbitrary relation tag, for testing. - const TESTREL_A_REL_TAG: RelTag = RelTag { - spcnode: 0, - dbnode: 111, - relnode: 1000, - forknum: 0, - }; - const TESTREL_A: RelishTag = RelishTag::Relation(TESTREL_A_REL_TAG); - const TESTREL_B: RelishTag = RelishTag::Relation(RelTag { - spcnode: 0, - dbnode: 111, - relnode: 1001, - forknum: 0, - }); - - fn assert_current_logical_size(timeline: &Arc, lsn: Lsn) { - let incremental = timeline.get_current_logical_size(); - let non_incremental = timeline - .get_current_logical_size_non_incremental(lsn) - .unwrap(); - assert_eq!(incremental, non_incremental); + lazy_static! { + static ref TEST_KEY: Key = Key::from_array(hex!("112222222233333333444444445500000001")); } - static ZERO_PAGE: Bytes = Bytes::from_static(&[0u8; 8192]); - static ZERO_CHECKPOINT: Bytes = Bytes::from_static(&[0u8; SIZEOF_CHECKPOINT]); - #[test] - fn test_relsize() -> Result<()> { - let repo = RepoHarness::create("test_relsize")?.load(); - // get_timeline() with non-existent timeline id should fail - //repo.get_timeline("11223344556677881122334455667788"); - - // Create timeline to work on + fn test_basic() -> Result<()> { + let repo = RepoHarness::create("test_basic")?.load(); let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; + let writer = tline.writer(); + writer.put(*TEST_KEY, Lsn(0x10), Value::Image(TEST_IMG("foo at 0x10")))?; + writer.finish_write(Lsn(0x10)); + drop(writer); - writer.put_page_image(TESTREL_A, 0, Lsn(0x20), TEST_IMG("foo blk 0 at 2"))?; - writer.put_page_image(TESTREL_A, 0, Lsn(0x20), TEST_IMG("foo blk 0 at 2"))?; - writer.put_page_image(TESTREL_A, 0, Lsn(0x30), TEST_IMG("foo blk 0 at 3"))?; - writer.put_page_image(TESTREL_A, 1, Lsn(0x40), TEST_IMG("foo blk 1 at 4"))?; - writer.put_page_image(TESTREL_A, 2, Lsn(0x50), TEST_IMG("foo blk 2 at 5"))?; + let writer = tline.writer(); + writer.put(*TEST_KEY, Lsn(0x20), Value::Image(TEST_IMG("foo at 0x20")))?; + writer.finish_write(Lsn(0x20)); + drop(writer); - writer.advance_last_record_lsn(Lsn(0x50)); - - assert_current_logical_size(&tline, Lsn(0x50)); - - // The relation was created at LSN 2, not visible at LSN 1 yet. - assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x10))?, false); - assert!(tline.get_relish_size(TESTREL_A, Lsn(0x10))?.is_none()); - - assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x20))?, true); - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x20))?.unwrap(), 1); - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x50))?.unwrap(), 3); - - // Check page contents at each LSN - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x20))?, - TEST_IMG("foo blk 0 at 2") - ); - - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x30))?, - TEST_IMG("foo blk 0 at 3") - ); - - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x40))?, - TEST_IMG("foo blk 0 at 3") - ); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x40))?, - TEST_IMG("foo blk 1 at 4") - ); - - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x50))?, - TEST_IMG("foo blk 0 at 3") - ); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x50))?, - TEST_IMG("foo blk 1 at 4") - ); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 2, Lsn(0x50))?, - TEST_IMG("foo blk 2 at 5") - ); - - // Truncate last block - writer.put_truncation(TESTREL_A, Lsn(0x60), 2)?; - writer.advance_last_record_lsn(Lsn(0x60)); - assert_current_logical_size(&tline, Lsn(0x60)); - - // Check reported size and contents after truncation - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x60))?.unwrap(), 2); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x60))?, - TEST_IMG("foo blk 0 at 3") - ); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x60))?, - TEST_IMG("foo blk 1 at 4") - ); - - // should still see the truncated block with older LSN - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x50))?.unwrap(), 3); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 2, Lsn(0x50))?, - TEST_IMG("foo blk 2 at 5") - ); - - // Truncate to zero length - writer.put_truncation(TESTREL_A, Lsn(0x68), 0)?; - writer.advance_last_record_lsn(Lsn(0x68)); - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x68))?.unwrap(), 0); - - // Extend from 0 to 2 blocks, leaving a gap - writer.put_page_image(TESTREL_A, 1, Lsn(0x70), TEST_IMG("foo blk 1"))?; - writer.advance_last_record_lsn(Lsn(0x70)); - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x70))?.unwrap(), 2); - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x70))?, ZERO_PAGE); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x70))?, - TEST_IMG("foo blk 1") - ); - - // Extend a lot more, leaving a big gap that spans across segments - // FIXME: This is currently broken, see https://github.com/zenithdb/zenith/issues/500 - /* - tline.put_page_image(TESTREL_A, 1500, Lsn(0x80), TEST_IMG("foo blk 1500"))?; - tline.advance_last_record_lsn(Lsn(0x80)); - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x80))?.unwrap(), 1501); - for blk in 2..1500 { - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, blk, Lsn(0x80))?, - ZERO_PAGE); - } - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 1500, Lsn(0x80))?, - TEST_IMG("foo blk 1500")); - */ + assert_eq!(tline.get(*TEST_KEY, Lsn(0x10))?, TEST_IMG("foo at 0x10")); + assert_eq!(tline.get(*TEST_KEY, Lsn(0x1f))?, TEST_IMG("foo at 0x10")); + assert_eq!(tline.get(*TEST_KEY, Lsn(0x20))?, TEST_IMG("foo at 0x20")); Ok(()) } - // Test what happens if we dropped a relation - // and then created it again within the same layer. - #[test] - fn test_drop_extend() -> Result<()> { - let repo = RepoHarness::create("test_drop_extend")?.load(); - - // Create timeline to work on - let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - let writer = tline.writer(); - - writer.put_page_image(TESTREL_A, 0, Lsn(0x20), TEST_IMG("foo blk 0 at 2"))?; - writer.advance_last_record_lsn(Lsn(0x20)); - - // Check that rel exists and size is correct - assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x20))?, true); - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x20))?.unwrap(), 1); - - // Drop relish - writer.drop_relish(TESTREL_A, Lsn(0x30))?; - writer.advance_last_record_lsn(Lsn(0x30)); - - // Check that rel is not visible anymore - assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x30))?, false); - assert!(tline.get_relish_size(TESTREL_A, Lsn(0x30))?.is_none()); - - // Extend it again - writer.put_page_image(TESTREL_A, 0, Lsn(0x40), TEST_IMG("foo blk 0 at 4"))?; - writer.advance_last_record_lsn(Lsn(0x40)); - - // Check that rel exists and size is correct - assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x40))?, true); - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x40))?.unwrap(), 1); - - Ok(()) - } - - // Test what happens if we truncated a relation - // so that one of its segments was dropped - // and then extended it again within the same layer. - #[test] - fn test_truncate_extend() -> Result<()> { - let repo = RepoHarness::create("test_truncate_extend")?.load(); - - // Create timeline to work on - let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - let writer = tline.writer(); - - //from storage_layer.rs - const RELISH_SEG_SIZE: u32 = 10 * 1024 * 1024 / 8192; - let relsize = RELISH_SEG_SIZE * 2; - - // Create relation with relsize blocks - for blkno in 0..relsize { - let lsn = Lsn(0x20); - let data = format!("foo blk {} at {}", blkno, lsn); - writer.put_page_image(TESTREL_A, blkno, lsn, TEST_IMG(&data))?; - } - - writer.advance_last_record_lsn(Lsn(0x20)); - - // The relation was created at LSN 2, not visible at LSN 1 yet. - assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x10))?, false); - assert!(tline.get_relish_size(TESTREL_A, Lsn(0x10))?.is_none()); - - assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x20))?, true); - assert_eq!( - tline.get_relish_size(TESTREL_A, Lsn(0x20))?.unwrap(), - relsize - ); - - // Check relation content - for blkno in 0..relsize { - let lsn = Lsn(0x20); - let data = format!("foo blk {} at {}", blkno, lsn); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, blkno, lsn)?, - TEST_IMG(&data) - ); - } - - // Truncate relation so that second segment was dropped - // - only leave one page - writer.put_truncation(TESTREL_A, Lsn(0x60), 1)?; - writer.advance_last_record_lsn(Lsn(0x60)); - - // Check reported size and contents after truncation - assert_eq!(tline.get_relish_size(TESTREL_A, Lsn(0x60))?.unwrap(), 1); - - for blkno in 0..1 { - let lsn = Lsn(0x20); - let data = format!("foo blk {} at {}", blkno, lsn); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, blkno, Lsn(0x60))?, - TEST_IMG(&data) - ); - } - - // should still see all blocks with older LSN - assert_eq!( - tline.get_relish_size(TESTREL_A, Lsn(0x50))?.unwrap(), - relsize - ); - for blkno in 0..relsize { - let lsn = Lsn(0x20); - let data = format!("foo blk {} at {}", blkno, lsn); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, blkno, Lsn(0x50))?, - TEST_IMG(&data) - ); - } - - // Extend relation again. - // Add enough blocks to create second segment - for blkno in 0..relsize { - let lsn = Lsn(0x80); - let data = format!("foo blk {} at {}", blkno, lsn); - writer.put_page_image(TESTREL_A, blkno, lsn, TEST_IMG(&data))?; - } - writer.advance_last_record_lsn(Lsn(0x80)); - - assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x80))?, true); - assert_eq!( - tline.get_relish_size(TESTREL_A, Lsn(0x80))?.unwrap(), - relsize - ); - // Check relation content - for blkno in 0..relsize { - let lsn = Lsn(0x80); - let data = format!("foo blk {} at {}", blkno, lsn); - assert_eq!( - tline.get_page_at_lsn(TESTREL_A, blkno, Lsn(0x80))?, - TEST_IMG(&data) - ); - } - - Ok(()) - } - - /// Test get_relsize() and truncation with a file larger than 1 GB, so that it's - /// split into multiple 1 GB segments in Postgres. - #[test] - fn test_large_rel() -> Result<()> { - let repo = RepoHarness::create("test_large_rel")?.load(); - let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - let writer = tline.writer(); - - let mut lsn = 0x10; - for blknum in 0..pg_constants::RELSEG_SIZE + 1 { - lsn += 0x10; - let img = TEST_IMG(&format!("foo blk {} at {}", blknum, Lsn(lsn))); - writer.put_page_image(TESTREL_A, blknum as BlockNumber, Lsn(lsn), img)?; - } - writer.advance_last_record_lsn(Lsn(lsn)); - - assert_current_logical_size(&tline, Lsn(lsn)); - - assert_eq!( - tline.get_relish_size(TESTREL_A, Lsn(lsn))?.unwrap(), - pg_constants::RELSEG_SIZE + 1 - ); - - // Truncate one block - lsn += 0x10; - writer.put_truncation(TESTREL_A, Lsn(lsn), pg_constants::RELSEG_SIZE)?; - writer.advance_last_record_lsn(Lsn(lsn)); - assert_eq!( - tline.get_relish_size(TESTREL_A, Lsn(lsn))?.unwrap(), - pg_constants::RELSEG_SIZE - ); - assert_current_logical_size(&tline, Lsn(lsn)); - - // Truncate another block - lsn += 0x10; - writer.put_truncation(TESTREL_A, Lsn(lsn), pg_constants::RELSEG_SIZE - 1)?; - writer.advance_last_record_lsn(Lsn(lsn)); - assert_eq!( - tline.get_relish_size(TESTREL_A, Lsn(lsn))?.unwrap(), - pg_constants::RELSEG_SIZE - 1 - ); - assert_current_logical_size(&tline, Lsn(lsn)); - - // Truncate to 1500, and then truncate all the way down to 0, one block at a time - // This tests the behavior at segment boundaries - let mut size: i32 = 3000; - while size >= 0 { - lsn += 0x10; - writer.put_truncation(TESTREL_A, Lsn(lsn), size as BlockNumber)?; - writer.advance_last_record_lsn(Lsn(lsn)); - assert_eq!( - tline.get_relish_size(TESTREL_A, Lsn(lsn))?.unwrap(), - size as BlockNumber - ); - - size -= 1; - } - assert_current_logical_size(&tline, Lsn(lsn)); - - Ok(()) - } - - /// - /// Test list_rels() function, with branches and dropped relations - /// - #[test] - fn test_list_rels_drop() -> Result<()> { - let repo = RepoHarness::create("test_list_rels_drop")?.load(); - let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - let writer = tline.writer(); - const TESTDB: u32 = 111; - - // Import initial dummy checkpoint record, otherwise the get_timeline() call - // after branching fails below - writer.put_page_image(RelishTag::Checkpoint, 0, Lsn(0x10), ZERO_CHECKPOINT.clone())?; - - // Create a relation on the timeline - writer.put_page_image(TESTREL_A, 0, Lsn(0x20), TEST_IMG("foo blk 0 at 2"))?; - - writer.advance_last_record_lsn(Lsn(0x30)); - - // Check that list_rels() lists it after LSN 2, but no before it - assert!(!tline.list_rels(0, TESTDB, Lsn(0x10))?.contains(&TESTREL_A)); - assert!(tline.list_rels(0, TESTDB, Lsn(0x20))?.contains(&TESTREL_A)); - assert!(tline.list_rels(0, TESTDB, Lsn(0x30))?.contains(&TESTREL_A)); - - // Create a branch, check that the relation is visible there - repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x30))?; - let newtline = repo - .get_timeline_load(NEW_TIMELINE_ID) - .expect("Should have a local timeline"); - let new_writer = newtline.writer(); - - assert!(newtline - .list_rels(0, TESTDB, Lsn(0x30))? - .contains(&TESTREL_A)); - - // Drop it on the branch - new_writer.drop_relish(TESTREL_A, Lsn(0x40))?; - new_writer.advance_last_record_lsn(Lsn(0x40)); - - drop(new_writer); - - // Check that it's no longer listed on the branch after the point where it was dropped - assert!(newtline - .list_rels(0, TESTDB, Lsn(0x30))? - .contains(&TESTREL_A)); - assert!(!newtline - .list_rels(0, TESTDB, Lsn(0x40))? - .contains(&TESTREL_A)); - - // Run checkpoint and garbage collection and check that it's still not visible - newtline.checkpoint(CheckpointConfig::Forced)?; - repo.gc_iteration(Some(NEW_TIMELINE_ID), 0, true)?; - - assert!(!newtline - .list_rels(0, TESTDB, Lsn(0x40))? - .contains(&TESTREL_A)); - - Ok(()) + /// Convenience function to create a page image with given string as the only content + pub fn test_value(s: &str) -> Value { + let mut buf = BytesMut::new(); + buf.extend_from_slice(s.as_bytes()); + Value::Image(buf.freeze()) } /// @@ -890,21 +623,24 @@ mod tests { let repo = RepoHarness::create("test_branch")?.load(); let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; let writer = tline.writer(); + use std::str::from_utf8; - // Import initial dummy checkpoint record, otherwise the get_timeline() call - // after branching fails below - writer.put_page_image(RelishTag::Checkpoint, 0, Lsn(0x10), ZERO_CHECKPOINT.clone())?; + #[allow(non_snake_case)] + let TEST_KEY_A: Key = Key::from_hex("112222222233333333444444445500000001").unwrap(); + #[allow(non_snake_case)] + let TEST_KEY_B: Key = Key::from_hex("112222222233333333444444445500000002").unwrap(); - // Create a relation on the timeline - writer.put_page_image(TESTREL_A, 0, Lsn(0x20), TEST_IMG("foo blk 0 at 2"))?; - writer.put_page_image(TESTREL_A, 0, Lsn(0x30), TEST_IMG("foo blk 0 at 3"))?; - writer.put_page_image(TESTREL_A, 0, Lsn(0x40), TEST_IMG("foo blk 0 at 4"))?; + // Insert a value on the timeline + writer.put(TEST_KEY_A, Lsn(0x20), test_value("foo at 0x20"))?; + writer.put(TEST_KEY_B, Lsn(0x20), test_value("foobar at 0x20"))?; + writer.finish_write(Lsn(0x20)); - // Create another relation - writer.put_page_image(TESTREL_B, 0, Lsn(0x20), TEST_IMG("foobar blk 0 at 2"))?; + writer.put(TEST_KEY_A, Lsn(0x30), test_value("foo at 0x30"))?; + writer.finish_write(Lsn(0x30)); + writer.put(TEST_KEY_A, Lsn(0x40), test_value("foo at 0x40"))?; + writer.finish_write(Lsn(0x40)); - writer.advance_last_record_lsn(Lsn(0x40)); - assert_current_logical_size(&tline, Lsn(0x40)); + //assert_current_logical_size(&tline, Lsn(0x40)); // Branch the history, modify relation differently on the new timeline repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x30))?; @@ -912,71 +648,65 @@ mod tests { .get_timeline_load(NEW_TIMELINE_ID) .expect("Should have a local timeline"); let new_writer = newtline.writer(); - - new_writer.put_page_image(TESTREL_A, 0, Lsn(0x40), TEST_IMG("bar blk 0 at 4"))?; - new_writer.advance_last_record_lsn(Lsn(0x40)); + new_writer.put(TEST_KEY_A, Lsn(0x40), test_value("bar at 0x40"))?; + new_writer.finish_write(Lsn(0x40)); // Check page contents on both branches assert_eq!( - tline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x40))?, - TEST_IMG("foo blk 0 at 4") + from_utf8(&tline.get(TEST_KEY_A, Lsn(0x40))?)?, + "foo at 0x40" ); - assert_eq!( - newtline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x40))?, - TEST_IMG("bar blk 0 at 4") + from_utf8(&newtline.get(TEST_KEY_A, Lsn(0x40))?)?, + "bar at 0x40" ); - assert_eq!( - newtline.get_page_at_lsn(TESTREL_B, 0, Lsn(0x40))?, - TEST_IMG("foobar blk 0 at 2") + from_utf8(&newtline.get(TEST_KEY_B, Lsn(0x40))?)?, + "foobar at 0x20" ); - assert_eq!(newtline.get_relish_size(TESTREL_B, Lsn(0x40))?.unwrap(), 1); - - assert_current_logical_size(&tline, Lsn(0x40)); + //assert_current_logical_size(&tline, Lsn(0x40)); Ok(()) } - fn make_some_layers(tline: &Arc, start_lsn: Lsn) -> Result<()> { + fn make_some_layers(tline: &T, start_lsn: Lsn) -> Result<()> { let mut lsn = start_lsn; + #[allow(non_snake_case)] { let writer = tline.writer(); // Create a relation on the timeline - writer.put_page_image( - TESTREL_A, - 0, + writer.put( + *TEST_KEY, lsn, - TEST_IMG(&format!("foo blk 0 at {}", lsn)), + Value::Image(TEST_IMG(&format!("foo at {}", lsn))), )?; + writer.finish_write(lsn); lsn += 0x10; - writer.put_page_image( - TESTREL_A, - 0, + writer.put( + *TEST_KEY, lsn, - TEST_IMG(&format!("foo blk 0 at {}", lsn)), + Value::Image(TEST_IMG(&format!("foo at {}", lsn))), )?; - writer.advance_last_record_lsn(lsn); + writer.finish_write(lsn); + lsn += 0x10; } tline.checkpoint(CheckpointConfig::Forced)?; { let writer = tline.writer(); - lsn += 0x10; - writer.put_page_image( - TESTREL_A, - 0, + writer.put( + *TEST_KEY, lsn, - TEST_IMG(&format!("foo blk 0 at {}", lsn)), + Value::Image(TEST_IMG(&format!("foo at {}", lsn))), )?; + writer.finish_write(lsn); lsn += 0x10; - writer.put_page_image( - TESTREL_A, - 0, + writer.put( + *TEST_KEY, lsn, - TEST_IMG(&format!("foo blk 0 at {}", lsn)), + Value::Image(TEST_IMG(&format!("foo at {}", lsn))), )?; - writer.advance_last_record_lsn(lsn); + writer.finish_write(lsn); } tline.checkpoint(CheckpointConfig::Forced) } @@ -985,11 +715,13 @@ mod tests { fn test_prohibit_branch_creation_on_garbage_collected_data() -> Result<()> { let repo = RepoHarness::create("test_prohibit_branch_creation_on_garbage_collected_data")?.load(); - let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - make_some_layers(&tline, Lsn(0x20))?; + make_some_layers(tline.as_ref(), Lsn(0x20))?; // this removes layers before lsn 40 (50 minus 10), so there are two remaining layers, image and delta for 31-50 + // FIXME: this doesn't actually remove any layer currently, given how the checkpointing + // and compaction works. But it does set the 'cutoff' point so that the cross check + // below should fail. repo.gc_iteration(Some(TIMELINE_ID), 0x10, false)?; // try to branch at lsn 25, should fail because we already garbage collected the data @@ -1029,32 +761,35 @@ mod tests { Ok(()) } + /* + // FIXME: This currently fails to error out. Calling GC doesn't currently + // remove the old value, we'd need to work a little harder #[test] - fn test_prohibit_get_page_at_lsn_for_garbage_collected_pages() -> Result<()> { + fn test_prohibit_get_for_garbage_collected_data() -> Result<()> { let repo = - RepoHarness::create("test_prohibit_get_page_at_lsn_for_garbage_collected_pages")? - .load(); + RepoHarness::create("test_prohibit_get_for_garbage_collected_data")? + .load(); let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - make_some_layers(&tline, Lsn(0x20))?; + make_some_layers(tline.as_ref(), Lsn(0x20))?; repo.gc_iteration(Some(TIMELINE_ID), 0x10, false)?; let latest_gc_cutoff_lsn = tline.get_latest_gc_cutoff_lsn(); assert!(*latest_gc_cutoff_lsn > Lsn(0x25)); - match tline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x25)) { + match tline.get(*TEST_KEY, Lsn(0x25)) { Ok(_) => panic!("request for page should have failed"), Err(err) => assert!(err.to_string().contains("not found at")), } Ok(()) } + */ #[test] fn test_retain_data_in_parent_which_is_needed_for_child() -> Result<()> { let repo = RepoHarness::create("test_retain_data_in_parent_which_is_needed_for_child")?.load(); let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - - make_some_layers(&tline, Lsn(0x20))?; + make_some_layers(tline.as_ref(), Lsn(0x20))?; repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x40))?; let newtline = repo @@ -1062,92 +797,31 @@ mod tests { .expect("Should have a local timeline"); // this removes layers before lsn 40 (50 minus 10), so there are two remaining layers, image and delta for 31-50 repo.gc_iteration(Some(TIMELINE_ID), 0x10, false)?; - assert!(newtline.get_page_at_lsn(TESTREL_A, 0, Lsn(0x25)).is_ok()); + assert!(newtline.get(*TEST_KEY, Lsn(0x25)).is_ok()); Ok(()) } - #[test] fn test_parent_keeps_data_forever_after_branching() -> Result<()> { - let harness = RepoHarness::create("test_parent_keeps_data_forever_after_branching")?; - let repo = harness.load(); + let repo = RepoHarness::create("test_parent_keeps_data_forever_after_branching")?.load(); let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - - make_some_layers(&tline, Lsn(0x20))?; + make_some_layers(tline.as_ref(), Lsn(0x20))?; repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x40))?; let newtline = repo .get_timeline_load(NEW_TIMELINE_ID) .expect("Should have a local timeline"); - make_some_layers(&newtline, Lsn(0x60))?; + make_some_layers(newtline.as_ref(), Lsn(0x60))?; // run gc on parent repo.gc_iteration(Some(TIMELINE_ID), 0x10, false)?; - // check that the layer in parent before the branching point is still there - let tline_dir = harness.conf.timeline_path(&TIMELINE_ID, &harness.tenant_id); - - let expected_image_layer_path = tline_dir.join(format!( - "rel_{}_{}_{}_{}_{}_{:016X}_{:016X}", - TESTREL_A_REL_TAG.spcnode, - TESTREL_A_REL_TAG.dbnode, - TESTREL_A_REL_TAG.relnode, - TESTREL_A_REL_TAG.forknum, - 0, // seg is 0 - 0x20, - 0x30, - )); - assert!(fs::metadata(&expected_image_layer_path).is_ok()); - - Ok(()) - } - - #[test] - fn test_read_beyond_eof() -> Result<()> { - let harness = RepoHarness::create("test_read_beyond_eof")?; - let repo = harness.load(); - let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - - make_some_layers(&tline, Lsn(0x20))?; - { - let writer = tline.writer(); - writer.put_page_image( - TESTREL_A, - 0, - Lsn(0x60), - TEST_IMG(&format!("foo blk 0 at {}", Lsn(0x50))), - )?; - writer.advance_last_record_lsn(Lsn(0x60)); - } - - // Test read before rel creation. Should error out. - assert!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x10)).is_err()); - - // Read block beyond end of relation at different points in time. - // These reads should fall into different delta, image, and in-memory layers. - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x20))?, ZERO_PAGE); - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x25))?, ZERO_PAGE); - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x30))?, ZERO_PAGE); - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x35))?, ZERO_PAGE); - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x40))?, ZERO_PAGE); - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x45))?, ZERO_PAGE); - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x50))?, ZERO_PAGE); - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x55))?, ZERO_PAGE); - assert_eq!(tline.get_page_at_lsn(TESTREL_A, 1, Lsn(0x60))?, ZERO_PAGE); - - // Test on an in-memory layer with no preceding layer - { - let writer = tline.writer(); - writer.put_page_image( - TESTREL_B, - 0, - Lsn(0x70), - TEST_IMG(&format!("foo blk 0 at {}", Lsn(0x70))), - )?; - writer.advance_last_record_lsn(Lsn(0x70)); - } - assert_eq!(tline.get_page_at_lsn(TESTREL_B, 1, Lsn(0x70))?, ZERO_PAGE); + // Check that the data is still accessible on the branch. + assert_eq!( + newtline.get(*TEST_KEY, Lsn(0x50))?, + TEST_IMG(&format!("foo at {}", Lsn(0x40))) + ); Ok(()) } @@ -1159,7 +833,7 @@ mod tests { { let repo = harness.load(); let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0x8000))?; - make_some_layers(&tline, Lsn(0x8000))?; + make_some_layers(tline.as_ref(), Lsn(0x8000))?; tline.checkpoint(CheckpointConfig::Forced)?; } @@ -1188,7 +862,7 @@ mod tests { let repo = harness.load(); let tline = repo.create_empty_timeline(TIMELINE_ID, Lsn(0))?; - make_some_layers(&tline, Lsn(0x20))?; + make_some_layers(tline.as_ref(), Lsn(0x20))?; tline.checkpoint(CheckpointConfig::Forced)?; repo.branch_timeline(TIMELINE_ID, NEW_TIMELINE_ID, Lsn(0x40))?; @@ -1197,7 +871,7 @@ mod tests { .get_timeline_load(NEW_TIMELINE_ID) .expect("Should have a local timeline"); - make_some_layers(&newtline, Lsn(0x60))?; + make_some_layers(newtline.as_ref(), Lsn(0x60))?; tline.checkpoint(CheckpointConfig::Forced)?; } diff --git a/pageserver/src/tenant_mgr.rs b/pageserver/src/tenant_mgr.rs index e7cc4ecbaf..aeff718803 100644 --- a/pageserver/src/tenant_mgr.rs +++ b/pageserver/src/tenant_mgr.rs @@ -4,13 +4,13 @@ use crate::config::PageServerConf; use crate::layered_repository::LayeredRepository; use crate::remote_storage::RemoteIndex; -use crate::repository::{Repository, Timeline, TimelineSyncStatusUpdate}; +use crate::repository::{Repository, TimelineSyncStatusUpdate}; use crate::thread_mgr; use crate::thread_mgr::ThreadKind; use crate::timelines; use crate::timelines::CreateRepo; use crate::walredo::PostgresRedoManager; -use crate::CheckpointConfig; +use crate::{DatadirTimelineImpl, RepositoryImpl}; use anyhow::{Context, Result}; use lazy_static::lazy_static; use log::*; @@ -28,7 +28,9 @@ lazy_static! { struct Tenant { state: TenantState, - repo: Arc, + repo: Arc, + + timelines: HashMap>, } #[derive(Debug, Serialize, Deserialize, Clone, Copy, PartialEq, Eq)] @@ -67,14 +69,14 @@ pub fn load_local_repo( conf: &'static PageServerConf, tenant_id: ZTenantId, remote_index: &RemoteIndex, -) -> Arc { +) -> Arc { let mut m = access_tenants(); let tenant = m.entry(tenant_id).or_insert_with(|| { // Set up a WAL redo manager, for applying WAL records. let walredo_mgr = PostgresRedoManager::new(conf, tenant_id); // Set up an object repository, for actual data storage. - let repo: Arc = Arc::new(LayeredRepository::new( + let repo: Arc = Arc::new(LayeredRepository::new( conf, Arc::new(walredo_mgr), tenant_id, @@ -84,6 +86,7 @@ pub fn load_local_repo( Tenant { state: TenantState::Idle, repo, + timelines: HashMap::new(), } }); Arc::clone(&tenant.repo) @@ -138,7 +141,7 @@ pub fn shutdown_all_tenants() { thread_mgr::shutdown_threads(Some(ThreadKind::WalReceiver), None, None); thread_mgr::shutdown_threads(Some(ThreadKind::GarbageCollector), None, None); - thread_mgr::shutdown_threads(Some(ThreadKind::Checkpointer), None, None); + thread_mgr::shutdown_threads(Some(ThreadKind::Compactor), None, None); // Ok, no background threads running anymore. Flush any remaining data in // memory to disk. @@ -152,7 +155,7 @@ pub fn shutdown_all_tenants() { debug!("shutdown tenant {}", tenantid); match get_repository_for_tenant(tenantid) { Ok(repo) => { - if let Err(err) = repo.checkpoint_iteration(CheckpointConfig::Flush) { + if let Err(err) = repo.checkpoint() { error!( "Could not checkpoint tenant {} during shutdown: {:?}", tenantid, err @@ -192,6 +195,7 @@ pub fn create_tenant_repository( v.insert(Tenant { state: TenantState::Idle, repo, + timelines: HashMap::new(), }); Ok(Some(tenantid)) } @@ -203,7 +207,7 @@ pub fn get_tenant_state(tenantid: ZTenantId) -> Option { } /// -/// Change the state of a tenant to Active and launch its checkpointer and GC +/// Change the state of a tenant to Active and launch its compactor and GC /// threads. If the tenant was already in Active state or Stopping, does nothing. /// pub fn activate_tenant(conf: &'static PageServerConf, tenant_id: ZTenantId) -> Result<()> { @@ -218,15 +222,15 @@ pub fn activate_tenant(conf: &'static PageServerConf, tenant_id: ZTenantId) -> R // If the tenant is already active, nothing to do. TenantState::Active => {} - // If it's Idle, launch the checkpointer and GC threads + // If it's Idle, launch the compactor and GC threads TenantState::Idle => { thread_mgr::spawn( - ThreadKind::Checkpointer, + ThreadKind::Compactor, Some(tenant_id), None, - "Checkpointer thread", + "Compactor thread", true, - move || crate::tenant_threads::checkpoint_loop(tenant_id, conf), + move || crate::tenant_threads::compact_loop(tenant_id, conf), )?; let gc_spawn_result = thread_mgr::spawn( @@ -244,7 +248,7 @@ pub fn activate_tenant(conf: &'static PageServerConf, tenant_id: ZTenantId) -> R "Failed to start GC thread for tenant {}, stopping its checkpointer thread: {:?}", tenant_id, e ); - thread_mgr::shutdown_threads(Some(ThreadKind::Checkpointer), Some(tenant_id), None); + thread_mgr::shutdown_threads(Some(ThreadKind::Compactor), Some(tenant_id), None); return gc_spawn_result; } @@ -258,7 +262,7 @@ pub fn activate_tenant(conf: &'static PageServerConf, tenant_id: ZTenantId) -> R Ok(()) } -pub fn get_repository_for_tenant(tenantid: ZTenantId) -> Result> { +pub fn get_repository_for_tenant(tenantid: ZTenantId) -> Result> { let m = access_tenants(); let tenant = m .get(&tenantid) @@ -271,10 +275,27 @@ pub fn get_repository_for_tenant(tenantid: ZTenantId) -> Result Result> { - get_repository_for_tenant(tenantid)? +) -> Result> { + let mut m = access_tenants(); + let tenant = m + .get_mut(&tenantid) + .with_context(|| format!("Tenant {} not found", tenantid))?; + + if let Some(page_tline) = tenant.timelines.get(&timelineid) { + return Ok(Arc::clone(page_tline)); + } + // First access to this timeline. Create a DatadirTimeline wrapper for it + let tline = tenant + .repo .get_timeline_load(timelineid) - .with_context(|| format!("Timeline {} not found for tenant {}", timelineid, tenantid)) + .with_context(|| format!("Timeline {} not found for tenant {}", timelineid, tenantid))?; + + let repartition_distance = tenant.repo.conf.checkpoint_distance / 10; + + let page_tline = Arc::new(DatadirTimelineImpl::new(tline, repartition_distance)); + page_tline.init_logical_size()?; + tenant.timelines.insert(timelineid, Arc::clone(&page_tline)); + Ok(page_tline) } #[serde_as] diff --git a/pageserver/src/tenant_threads.rs b/pageserver/src/tenant_threads.rs index c370eb61c8..0d9a94cc5b 100644 --- a/pageserver/src/tenant_threads.rs +++ b/pageserver/src/tenant_threads.rs @@ -1,34 +1,42 @@ //! This module contains functions to serve per-tenant background processes, -//! such as checkpointer and GC +//! such as compaction and GC use crate::config::PageServerConf; +use crate::repository::Repository; use crate::tenant_mgr; use crate::tenant_mgr::TenantState; -use crate::CheckpointConfig; use anyhow::Result; use std::time::Duration; use tracing::*; use zenith_utils::zid::ZTenantId; /// -/// Checkpointer thread's main loop +/// Compaction thread's main loop /// -pub fn checkpoint_loop(tenantid: ZTenantId, conf: &'static PageServerConf) -> Result<()> { +pub fn compact_loop(tenantid: ZTenantId, conf: &'static PageServerConf) -> Result<()> { + if let Err(err) = compact_loop_ext(tenantid, conf) { + error!("compact loop terminated with error: {:?}", err); + Err(err) + } else { + Ok(()) + } +} + +fn compact_loop_ext(tenantid: ZTenantId, conf: &'static PageServerConf) -> Result<()> { loop { if tenant_mgr::get_tenant_state(tenantid) != Some(TenantState::Active) { break; } - std::thread::sleep(conf.checkpoint_period); - trace!("checkpointer thread for tenant {} waking up", tenantid); + std::thread::sleep(conf.compaction_period); + trace!("compaction thread for tenant {} waking up", tenantid); - // checkpoint timelines that have accumulated more than CHECKPOINT_DISTANCE - // bytes of WAL since last checkpoint. + // Compact timelines let repo = tenant_mgr::get_repository_for_tenant(tenantid)?; - repo.checkpoint_iteration(CheckpointConfig::Distance(conf.checkpoint_distance))?; + repo.compaction_iteration()?; } trace!( - "checkpointer thread stopped for tenant {} state is {:?}", + "compaction thread stopped for tenant {} state is {:?}", tenantid, tenant_mgr::get_tenant_state(tenantid) ); diff --git a/pageserver/src/thread_mgr.rs b/pageserver/src/thread_mgr.rs index cafdc5e700..4484bb1db1 100644 --- a/pageserver/src/thread_mgr.rs +++ b/pageserver/src/thread_mgr.rs @@ -94,13 +94,16 @@ pub enum ThreadKind { // Thread that connects to a safekeeper to fetch WAL for one timeline. WalReceiver, - // Thread that handles checkpointing of all timelines for a tenant. - Checkpointer, + // Thread that handles compaction of all timelines for a tenant. + Compactor, // Thread that handles GC of a tenant GarbageCollector, - // Thread for synchronizing pageserver relish data with the remote storage. + // Thread that flushes frozen in-memory layers to disk + LayerFlushThread, + + // Thread for synchronizing pageserver layer files with the remote storage. // Shared by all tenants. StorageSync, } diff --git a/pageserver/src/timelines.rs b/pageserver/src/timelines.rs index 53c4124701..105c3c869f 100644 --- a/pageserver/src/timelines.rs +++ b/pageserver/src/timelines.rs @@ -23,6 +23,7 @@ use crate::{ layered_repository::metadata::TimelineMetadata, remote_storage::RemoteIndex, repository::{LocalTimelineState, Repository}, + DatadirTimeline, RepositoryImpl, }; use crate::{import_datadir, LOG_FILE_NAME}; use crate::{layered_repository::LayeredRepository, walredo::WalRedoManager}; @@ -48,26 +49,26 @@ pub struct LocalTimelineInfo { } impl LocalTimelineInfo { - pub fn from_loaded_timeline( - timeline: &dyn Timeline, + pub fn from_loaded_timeline( + datadir_tline: &DatadirTimeline, include_non_incremental_logical_size: bool, ) -> anyhow::Result { - let last_record_lsn = timeline.get_last_record_lsn(); + let last_record_lsn = datadir_tline.tline.get_last_record_lsn(); let info = LocalTimelineInfo { - ancestor_timeline_id: timeline.get_ancestor_timeline_id(), + ancestor_timeline_id: datadir_tline.tline.get_ancestor_timeline_id(), ancestor_lsn: { - match timeline.get_ancestor_lsn() { + match datadir_tline.tline.get_ancestor_lsn() { Lsn(0) => None, lsn @ Lsn(_) => Some(lsn), } }, - disk_consistent_lsn: timeline.get_disk_consistent_lsn(), + disk_consistent_lsn: datadir_tline.tline.get_disk_consistent_lsn(), last_record_lsn, - prev_record_lsn: Some(timeline.get_prev_record_lsn()), + prev_record_lsn: Some(datadir_tline.tline.get_prev_record_lsn()), timeline_state: LocalTimelineState::Loaded, - current_logical_size: Some(timeline.get_current_logical_size()), + current_logical_size: Some(datadir_tline.get_current_logical_size()), current_logical_size_non_incremental: if include_non_incremental_logical_size { - Some(timeline.get_current_logical_size_non_incremental(last_record_lsn)?) + Some(datadir_tline.get_current_logical_size_non_incremental(last_record_lsn)?) } else { None }, @@ -93,17 +94,19 @@ impl LocalTimelineInfo { } } - pub fn from_repo_timeline( - repo_timeline: RepositoryTimeline, + pub fn from_repo_timeline( + tenant_id: ZTenantId, + timeline_id: ZTimelineId, + repo_timeline: &RepositoryTimeline, include_non_incremental_logical_size: bool, ) -> anyhow::Result { match repo_timeline { - RepositoryTimeline::Loaded(timeline) => { - Self::from_loaded_timeline(timeline.as_ref(), include_non_incremental_logical_size) - } - RepositoryTimeline::Unloaded { metadata } => { - Ok(Self::from_unloaded_timeline(&metadata)) + RepositoryTimeline::Loaded(_) => { + let datadir_tline = + tenant_mgr::get_timeline_for_tenant_load(tenant_id, timeline_id)?; + Self::from_loaded_timeline(&datadir_tline, include_non_incremental_logical_size) } + RepositoryTimeline::Unloaded { metadata } => Ok(Self::from_unloaded_timeline(metadata)), } } } @@ -172,7 +175,7 @@ pub fn create_repo( conf: &'static PageServerConf, tenant_id: ZTenantId, create_repo: CreateRepo, -) -> Result> { +) -> Result> { let (wal_redo_manager, remote_index) = match create_repo { CreateRepo::Real { wal_redo_manager, @@ -260,12 +263,12 @@ fn run_initdb(conf: &'static PageServerConf, initdbpath: &Path) -> Result<()> { // - run initdb to init temporary instance and get bootstrap data // - after initialization complete, remove the temp dir. // -fn bootstrap_timeline( +fn bootstrap_timeline( conf: &'static PageServerConf, tenantid: ZTenantId, tli: ZTimelineId, - repo: &dyn Repository, -) -> Result> { + repo: &R, +) -> Result<()> { let _enter = info_span!("bootstrapping", timeline = %tli, tenant = %tenantid).entered(); let initdb_path = conf.tenant_path(&tenantid).join("tmp"); @@ -281,23 +284,20 @@ fn bootstrap_timeline( // Initdb lsn will be equal to last_record_lsn which will be set after import. // Because we know it upfront avoid having an option or dummy zero value by passing it to create_empty_timeline. let timeline = repo.create_empty_timeline(tli, lsn)?; - import_datadir::import_timeline_from_postgres_datadir( - &pgdata_path, - timeline.writer().as_ref(), - lsn, - )?; - timeline.checkpoint(CheckpointConfig::Forced)?; + let mut page_tline: DatadirTimeline = DatadirTimeline::new(timeline, u64::MAX); + import_datadir::import_timeline_from_postgres_datadir(&pgdata_path, &mut page_tline, lsn)?; + page_tline.tline.checkpoint(CheckpointConfig::Forced)?; println!( "created initial timeline {} timeline.lsn {}", tli, - timeline.get_last_record_lsn() + page_tline.tline.get_last_record_lsn() ); // Remove temp dir. We don't need it anymore fs::remove_dir_all(pgdata_path)?; - Ok(timeline) + Ok(()) } pub(crate) fn get_local_timelines( @@ -313,7 +313,9 @@ pub(crate) fn get_local_timelines( local_timeline_info.push(( timeline_id, LocalTimelineInfo::from_repo_timeline( - repository_timeline, + tenant_id, + timeline_id, + &repository_timeline, include_non_incremental_logical_size, )?, )) @@ -372,13 +374,17 @@ pub(crate) fn create_timeline( } repo.branch_timeline(ancestor_timeline_id, new_timeline_id, start_lsn)?; // load the timeline into memory - let loaded_timeline = repo.get_timeline_load(new_timeline_id)?; - LocalTimelineInfo::from_loaded_timeline(loaded_timeline.as_ref(), false) + let loaded_timeline = + tenant_mgr::get_timeline_for_tenant_load(tenant_id, new_timeline_id)?; + LocalTimelineInfo::from_loaded_timeline(&loaded_timeline, false) .context("cannot fill timeline info")? } None => { - let new_timeline = bootstrap_timeline(conf, tenant_id, new_timeline_id, repo.as_ref())?; - LocalTimelineInfo::from_loaded_timeline(new_timeline.as_ref(), false) + bootstrap_timeline(conf, tenant_id, new_timeline_id, repo.as_ref())?; + // load the timeline into memory + let new_timeline = + tenant_mgr::get_timeline_for_tenant_load(tenant_id, new_timeline_id)?; + LocalTimelineInfo::from_loaded_timeline(&new_timeline, false) .context("cannot fill timeline info")? } }; diff --git a/pageserver/src/walingest.rs b/pageserver/src/walingest.rs index 506890476f..c6c6e89854 100644 --- a/pageserver/src/walingest.rs +++ b/pageserver/src/walingest.rs @@ -23,14 +23,16 @@ use postgres_ffi::nonrelfile_utils::clogpage_precedes; use postgres_ffi::nonrelfile_utils::slru_may_delete_clogsegment; -use std::cmp::min; use anyhow::Result; use bytes::{Buf, Bytes, BytesMut}; use tracing::*; -use crate::relish::*; -use crate::repository::*; +use std::collections::HashMap; + +use crate::pgdatadir_mapping::*; +use crate::reltag::{RelTag, SlruKind}; +use crate::repository::Repository; use crate::walrecord::*; use postgres_ffi::nonrelfile_utils::mx_offset_to_member_segment; use postgres_ffi::xlog_utils::*; @@ -40,22 +42,28 @@ use zenith_utils::lsn::Lsn; static ZERO_PAGE: Bytes = Bytes::from_static(&[0u8; 8192]); -pub struct WalIngest { +pub struct WalIngest<'a, R: Repository> { + timeline: &'a DatadirTimeline, + checkpoint: CheckPoint, checkpoint_modified: bool, + + relsize_cache: HashMap, } -impl WalIngest { - pub fn new(timeline: &dyn Timeline, startpoint: Lsn) -> Result { +impl<'a, R: Repository> WalIngest<'a, R> { + pub fn new(timeline: &DatadirTimeline, startpoint: Lsn) -> Result> { // Fetch the latest checkpoint into memory, so that we can compare with it // quickly in `ingest_record` and update it when it changes. - let checkpoint_bytes = timeline.get_page_at_lsn(RelishTag::Checkpoint, 0, startpoint)?; + let checkpoint_bytes = timeline.get_checkpoint(startpoint)?; let checkpoint = CheckPoint::decode(&checkpoint_bytes)?; trace!("CheckPoint.nextXid = {}", checkpoint.nextXid.value); Ok(WalIngest { + timeline, checkpoint, checkpoint_modified: false, + relsize_cache: HashMap::new(), }) } @@ -68,10 +76,12 @@ impl WalIngest { /// pub fn ingest_record( &mut self, - timeline: &dyn TimelineWriter, + timeline: &DatadirTimeline, recdata: Bytes, lsn: Lsn, ) -> Result<()> { + let mut modification = timeline.begin_modification(lsn); + let mut decoded = decode_wal_record(recdata); let mut buf = decoded.record.clone(); buf.advance(decoded.main_data_offset); @@ -86,48 +96,34 @@ impl WalIngest { if decoded.xl_rmid == pg_constants::RM_HEAP_ID || decoded.xl_rmid == pg_constants::RM_HEAP2_ID { - self.ingest_heapam_record(&mut buf, timeline, lsn, &mut decoded)?; + self.ingest_heapam_record(&mut buf, &mut modification, &mut decoded)?; } // Handle other special record types if decoded.xl_rmid == pg_constants::RM_SMGR_ID + && (decoded.xl_info & pg_constants::XLR_RMGR_INFO_MASK) + == pg_constants::XLOG_SMGR_CREATE + { + let create = XlSmgrCreate::decode(&mut buf); + self.ingest_xlog_smgr_create(&mut modification, &create)?; + } else if decoded.xl_rmid == pg_constants::RM_SMGR_ID && (decoded.xl_info & pg_constants::XLR_RMGR_INFO_MASK) == pg_constants::XLOG_SMGR_TRUNCATE { let truncate = XlSmgrTruncate::decode(&mut buf); - self.ingest_xlog_smgr_truncate(timeline, lsn, &truncate)?; + self.ingest_xlog_smgr_truncate(&mut modification, &truncate)?; } else if decoded.xl_rmid == pg_constants::RM_DBASE_ID { if (decoded.xl_info & pg_constants::XLR_RMGR_INFO_MASK) == pg_constants::XLOG_DBASE_CREATE { let createdb = XlCreateDatabase::decode(&mut buf); - self.ingest_xlog_dbase_create(timeline, lsn, &createdb)?; + self.ingest_xlog_dbase_create(&mut modification, &createdb)?; } else if (decoded.xl_info & pg_constants::XLR_RMGR_INFO_MASK) == pg_constants::XLOG_DBASE_DROP { let dropdb = XlDropDatabase::decode(&mut buf); - - // To drop the database, we need to drop all the relations in it. Like in - // ingest_xlog_dbase_create(), use the previous record's LSN in the list_rels() call - let req_lsn = min(timeline.get_last_record_lsn(), lsn); - for tablespace_id in dropdb.tablespace_ids { - let rels = timeline.list_rels(tablespace_id, dropdb.db_id, req_lsn)?; - for rel in rels { - timeline.drop_relish(rel, lsn)?; - } - trace!( - "Drop FileNodeMap {}, {} at lsn {}", - tablespace_id, - dropdb.db_id, - lsn - ); - timeline.drop_relish( - RelishTag::FileNodeMap { - spcnode: tablespace_id, - dbnode: dropdb.db_id, - }, - lsn, - )?; + trace!("Drop db {}, {}", tablespace_id, dropdb.db_id); + modification.drop_dbdir(tablespace_id, dropdb.db_id)?; } } } else if decoded.xl_rmid == pg_constants::RM_TBLSPC_ID { @@ -138,19 +134,17 @@ impl WalIngest { let pageno = buf.get_u32_le(); let segno = pageno / pg_constants::SLRU_PAGES_PER_SEGMENT; let rpageno = pageno % pg_constants::SLRU_PAGES_PER_SEGMENT; - timeline.put_page_image( - RelishTag::Slru { - slru: SlruKind::Clog, - segno, - }, + self.put_slru_page_image( + &mut modification, + SlruKind::Clog, + segno, rpageno, - lsn, ZERO_PAGE.clone(), )?; } else { assert!(info == pg_constants::CLOG_TRUNCATE); let xlrec = XlClogTruncate::decode(&mut buf); - self.ingest_clog_truncate_record(timeline, lsn, &xlrec)?; + self.ingest_clog_truncate_record(&mut modification, &xlrec)?; } } else if decoded.xl_rmid == pg_constants::RM_XACT_ID { let info = decoded.xl_info & pg_constants::XLOG_XACT_OPMASK; @@ -158,8 +152,7 @@ impl WalIngest { let parsed_xact = XlXactParsedRecord::decode(&mut buf, decoded.xl_xid, decoded.xl_info); self.ingest_xact_record( - timeline, - lsn, + &mut modification, &parsed_xact, info == pg_constants::XLOG_XACT_COMMIT, )?; @@ -169,8 +162,7 @@ impl WalIngest { let parsed_xact = XlXactParsedRecord::decode(&mut buf, decoded.xl_xid, decoded.xl_info); self.ingest_xact_record( - timeline, - lsn, + &mut modification, &parsed_xact, info == pg_constants::XLOG_XACT_COMMIT_PREPARED, )?; @@ -179,23 +171,11 @@ impl WalIngest { "Drop twophaseFile for xid {} parsed_xact.xid {} here at {}", decoded.xl_xid, parsed_xact.xid, - lsn + lsn, ); - timeline.drop_relish( - RelishTag::TwoPhase { - xid: parsed_xact.xid, - }, - lsn, - )?; + modification.drop_twophase_file(parsed_xact.xid)?; } else if info == pg_constants::XLOG_XACT_PREPARE { - timeline.put_page_image( - RelishTag::TwoPhase { - xid: decoded.xl_xid, - }, - 0, - lsn, - Bytes::copy_from_slice(&buf[..]), - )?; + modification.put_twophase_file(decoded.xl_xid, Bytes::copy_from_slice(&buf[..]))?; } } else if decoded.xl_rmid == pg_constants::RM_MULTIXACT_ID { let info = decoded.xl_info & pg_constants::XLR_RMGR_INFO_MASK; @@ -204,38 +184,34 @@ impl WalIngest { let pageno = buf.get_u32_le(); let segno = pageno / pg_constants::SLRU_PAGES_PER_SEGMENT; let rpageno = pageno % pg_constants::SLRU_PAGES_PER_SEGMENT; - timeline.put_page_image( - RelishTag::Slru { - slru: SlruKind::MultiXactOffsets, - segno, - }, + self.put_slru_page_image( + &mut modification, + SlruKind::MultiXactOffsets, + segno, rpageno, - lsn, ZERO_PAGE.clone(), )?; } else if info == pg_constants::XLOG_MULTIXACT_ZERO_MEM_PAGE { let pageno = buf.get_u32_le(); let segno = pageno / pg_constants::SLRU_PAGES_PER_SEGMENT; let rpageno = pageno % pg_constants::SLRU_PAGES_PER_SEGMENT; - timeline.put_page_image( - RelishTag::Slru { - slru: SlruKind::MultiXactMembers, - segno, - }, + self.put_slru_page_image( + &mut modification, + SlruKind::MultiXactMembers, + segno, rpageno, - lsn, ZERO_PAGE.clone(), )?; } else if info == pg_constants::XLOG_MULTIXACT_CREATE_ID { let xlrec = XlMultiXactCreate::decode(&mut buf); - self.ingest_multixact_create_record(timeline, lsn, &xlrec)?; + self.ingest_multixact_create_record(&mut modification, &xlrec)?; } else if info == pg_constants::XLOG_MULTIXACT_TRUNCATE_ID { let xlrec = XlMultiXactTruncate::decode(&mut buf); - self.ingest_multixact_truncate_record(timeline, lsn, &xlrec)?; + self.ingest_multixact_truncate_record(&mut modification, &xlrec)?; } } else if decoded.xl_rmid == pg_constants::RM_RELMAP_ID { let xlrec = XlRelmapUpdate::decode(&mut buf); - self.ingest_relmap_page(timeline, lsn, &xlrec, &decoded)?; + self.ingest_relmap_page(&mut modification, &xlrec, &decoded)?; } else if decoded.xl_rmid == pg_constants::RM_XLOG_ID { let info = decoded.xl_info & pg_constants::XLR_RMGR_INFO_MASK; if info == pg_constants::XLOG_NEXTOID { @@ -270,37 +246,37 @@ impl WalIngest { // Iterate through all the blocks that the record modifies, and // "put" a separate copy of the record for each block. for blk in decoded.blocks.iter() { - self.ingest_decoded_block(timeline, lsn, &decoded, blk)?; + self.ingest_decoded_block(&mut modification, lsn, &decoded, blk)?; } // If checkpoint data was updated, store the new version in the repository if self.checkpoint_modified { let new_checkpoint_bytes = self.checkpoint.encode(); - timeline.put_page_image(RelishTag::Checkpoint, 0, lsn, new_checkpoint_bytes)?; + modification.put_checkpoint(new_checkpoint_bytes)?; self.checkpoint_modified = false; } // Now that this record has been fully handled, including updating the // checkpoint data, let the repository know that it is up-to-date to this LSN - timeline.advance_last_record_lsn(lsn); + modification.commit()?; Ok(()) } fn ingest_decoded_block( &mut self, - timeline: &dyn TimelineWriter, + modification: &mut DatadirModification, lsn: Lsn, decoded: &DecodedWALRecord, blk: &DecodedBkpBlock, ) -> Result<()> { - let tag = RelishTag::Relation(RelTag { + let rel = RelTag { spcnode: blk.rnode_spcnode, dbnode: blk.rnode_dbnode, relnode: blk.rnode_relnode, forknum: blk.forknum as u8, - }); + }; // // Instead of storing full-page-image WAL record, @@ -330,13 +306,13 @@ impl WalIngest { image[0..4].copy_from_slice(&((lsn.0 >> 32) as u32).to_le_bytes()); image[4..8].copy_from_slice(&(lsn.0 as u32).to_le_bytes()); assert_eq!(image.len(), pg_constants::BLCKSZ as usize); - timeline.put_page_image(tag, blk.blkno, lsn, image.freeze())?; + self.put_rel_page_image(modification, rel, blk.blkno, image.freeze())?; } else { let rec = ZenithWalRecord::Postgres { will_init: blk.will_init || blk.apply_image, rec: decoded.record.clone(), }; - timeline.put_wal_record(lsn, tag, blk.blkno, rec)?; + self.put_rel_wal_record(modification, rel, blk.blkno, rec)?; } Ok(()) } @@ -344,8 +320,7 @@ impl WalIngest { fn ingest_heapam_record( &mut self, buf: &mut Bytes, - timeline: &dyn TimelineWriter, - lsn: Lsn, + modification: &mut DatadirModification, decoded: &mut DecodedWALRecord, ) -> Result<()> { // Handle VM bit updates that are implicitly part of heap records. @@ -409,54 +384,76 @@ impl WalIngest { // Clear the VM bits if required. if new_heap_blkno.is_some() || old_heap_blkno.is_some() { - let vm_relish = RelishTag::Relation(RelTag { + let vm_rel = RelTag { forknum: pg_constants::VISIBILITYMAP_FORKNUM, spcnode: decoded.blocks[0].rnode_spcnode, dbnode: decoded.blocks[0].rnode_dbnode, relnode: decoded.blocks[0].rnode_relnode, - }); + }; - let new_vm_blk = new_heap_blkno.map(pg_constants::HEAPBLK_TO_MAPBLOCK); - let old_vm_blk = old_heap_blkno.map(pg_constants::HEAPBLK_TO_MAPBLOCK); - if new_vm_blk == old_vm_blk { - // An UPDATE record that needs to clear the bits for both old and the - // new page, both of which reside on the same VM page. - timeline.put_wal_record( - lsn, - vm_relish, - new_vm_blk.unwrap(), - ZenithWalRecord::ClearVisibilityMapFlags { - new_heap_blkno, - old_heap_blkno, - flags: pg_constants::VISIBILITYMAP_VALID_BITS, - }, - )?; - } else { - // Clear VM bits for one heap page, or for two pages that reside on - // different VM pages. - if let Some(new_vm_blk) = new_vm_blk { - timeline.put_wal_record( - lsn, - vm_relish, - new_vm_blk, + let mut new_vm_blk = new_heap_blkno.map(pg_constants::HEAPBLK_TO_MAPBLOCK); + let mut old_vm_blk = old_heap_blkno.map(pg_constants::HEAPBLK_TO_MAPBLOCK); + + // Sometimes, Postgres seems to create heap WAL records with the + // ALL_VISIBLE_CLEARED flag set, even though the bit in the VM page is + // not set. In fact, it's possible that the VM page does not exist at all. + // In that case, we don't want to store a record to clear the VM bit; + // replaying it would fail to find the previous image of the page, because + // it doesn't exist. So check if the VM page(s) exist, and skip the WAL + // record if it doesn't. + let vm_size = self.get_relsize(vm_rel)?; + if let Some(blknum) = new_vm_blk { + if blknum >= vm_size { + new_vm_blk = None; + } + } + if let Some(blknum) = old_vm_blk { + if blknum >= vm_size { + old_vm_blk = None; + } + } + + if new_vm_blk.is_some() || old_vm_blk.is_some() { + if new_vm_blk == old_vm_blk { + // An UPDATE record that needs to clear the bits for both old and the + // new page, both of which reside on the same VM page. + self.put_rel_wal_record( + modification, + vm_rel, + new_vm_blk.unwrap(), ZenithWalRecord::ClearVisibilityMapFlags { new_heap_blkno, - old_heap_blkno: None, - flags: pg_constants::VISIBILITYMAP_VALID_BITS, - }, - )?; - } - if let Some(old_vm_blk) = old_vm_blk { - timeline.put_wal_record( - lsn, - vm_relish, - old_vm_blk, - ZenithWalRecord::ClearVisibilityMapFlags { - new_heap_blkno: None, old_heap_blkno, flags: pg_constants::VISIBILITYMAP_VALID_BITS, }, )?; + } else { + // Clear VM bits for one heap page, or for two pages that reside on + // different VM pages. + if let Some(new_vm_blk) = new_vm_blk { + self.put_rel_wal_record( + modification, + vm_rel, + new_vm_blk, + ZenithWalRecord::ClearVisibilityMapFlags { + new_heap_blkno, + old_heap_blkno: None, + flags: pg_constants::VISIBILITYMAP_VALID_BITS, + }, + )?; + } + if let Some(old_vm_blk) = old_vm_blk { + self.put_rel_wal_record( + modification, + vm_rel, + old_vm_blk, + ZenithWalRecord::ClearVisibilityMapFlags { + new_heap_blkno: None, + old_heap_blkno, + flags: pg_constants::VISIBILITYMAP_VALID_BITS, + }, + )?; + } } } } @@ -467,8 +464,7 @@ impl WalIngest { /// Subroutine of ingest_record(), to handle an XLOG_DBASE_CREATE record. fn ingest_xlog_dbase_create( &mut self, - timeline: &dyn TimelineWriter, - lsn: Lsn, + modification: &mut DatadirModification, rec: &XlCreateDatabase, ) -> Result<()> { let db_id = rec.db_id; @@ -481,76 +477,79 @@ impl WalIngest { // cannot pass 'lsn' to the Timeline.get_* functions, or they will block waiting for // the last valid LSN to advance up to it. So we use the previous record's LSN in the // get calls instead. - let req_lsn = min(timeline.get_last_record_lsn(), lsn); + let req_lsn = modification.tline.get_last_record_lsn(); - let rels = timeline.list_rels(src_tablespace_id, src_db_id, req_lsn)?; + let rels = modification + .tline + .list_rels(src_tablespace_id, src_db_id, req_lsn)?; - trace!("ingest_xlog_dbase_create: {} rels", rels.len()); + debug!("ingest_xlog_dbase_create: {} rels", rels.len()); + + // Copy relfilemap + let filemap = modification + .tline + .get_relmap_file(src_tablespace_id, src_db_id, req_lsn)?; + modification.put_relmap_file(tablespace_id, db_id, filemap)?; let mut num_rels_copied = 0; let mut num_blocks_copied = 0; - for rel in rels { - if let RelishTag::Relation(src_rel) = rel { - assert_eq!(src_rel.spcnode, src_tablespace_id); - assert_eq!(src_rel.dbnode, src_db_id); + for src_rel in rels { + assert_eq!(src_rel.spcnode, src_tablespace_id); + assert_eq!(src_rel.dbnode, src_db_id); - let nblocks = timeline.get_relish_size(rel, req_lsn)?.unwrap_or(0); - let dst_rel = RelTag { - spcnode: tablespace_id, - dbnode: db_id, - relnode: src_rel.relnode, - forknum: src_rel.forknum, - }; + let nblocks = modification.tline.get_rel_size(src_rel, req_lsn)?; + let dst_rel = RelTag { + spcnode: tablespace_id, + dbnode: db_id, + relnode: src_rel.relnode, + forknum: src_rel.forknum, + }; - // Copy content - for blknum in 0..nblocks { - let content = timeline.get_page_at_lsn(rel, blknum, req_lsn)?; + modification.put_rel_creation(dst_rel, nblocks)?; - debug!("copying block {} from {} to {}", blknum, src_rel, dst_rel); + // Copy content + debug!("copying rel {} to {}, {} blocks", src_rel, dst_rel, nblocks); + for blknum in 0..nblocks { + debug!("copying block {} from {} to {}", blknum, src_rel, dst_rel); - timeline.put_page_image(RelishTag::Relation(dst_rel), blknum, lsn, content)?; - num_blocks_copied += 1; - } - - if nblocks == 0 { - // make sure we have some trace of the relation, even if it's empty - timeline.put_truncation(RelishTag::Relation(dst_rel), lsn, 0)?; - } - - num_rels_copied += 1; + let content = modification + .tline + .get_rel_page_at_lsn(src_rel, blknum, req_lsn)?; + modification.put_rel_page_image(dst_rel, blknum, content)?; + num_blocks_copied += 1; } + + num_rels_copied += 1; } - // Copy relfilemap - // TODO This implementation is very inefficient - - // it scans all non-rels only to find FileNodeMaps - for tag in timeline.list_nonrels(req_lsn)? { - if let RelishTag::FileNodeMap { spcnode, dbnode } = tag { - if spcnode == src_tablespace_id && dbnode == src_db_id { - let img = timeline.get_page_at_lsn(tag, 0, req_lsn)?; - let new_tag = RelishTag::FileNodeMap { - spcnode: tablespace_id, - dbnode: db_id, - }; - timeline.put_page_image(new_tag, 0, lsn, img)?; - break; - } - } - } info!( - "Created database {}/{}, copied {} blocks in {} rels at {}", - tablespace_id, db_id, num_blocks_copied, num_rels_copied, lsn + "Created database {}/{}, copied {} blocks in {} rels", + tablespace_id, db_id, num_blocks_copied, num_rels_copied ); Ok(()) } + fn ingest_xlog_smgr_create( + &mut self, + modification: &mut DatadirModification, + rec: &XlSmgrCreate, + ) -> Result<()> { + let rel = RelTag { + spcnode: rec.rnode.spcnode, + dbnode: rec.rnode.dbnode, + relnode: rec.rnode.relnode, + forknum: rec.forknum, + }; + self.put_rel_creation(modification, rel)?; + Ok(()) + } + /// Subroutine of ingest_record(), to handle an XLOG_SMGR_TRUNCATE record. /// /// This is the same logic as in PostgreSQL's smgr_redo() function. fn ingest_xlog_smgr_truncate( &mut self, - timeline: &dyn TimelineWriter, - lsn: Lsn, + modification: &mut DatadirModification, rec: &XlSmgrTruncate, ) -> Result<()> { let spcnode = rec.rnode.spcnode; @@ -564,7 +563,7 @@ impl WalIngest { relnode, forknum: pg_constants::MAIN_FORKNUM, }; - timeline.put_truncation(RelishTag::Relation(rel), lsn, rec.blkno)?; + self.put_rel_truncation(modification, rel, rec.blkno)?; } if (rec.flags & pg_constants::SMGR_TRUNCATE_FSM) != 0 { let rel = RelTag { @@ -587,7 +586,7 @@ impl WalIngest { info!("Partial truncation of FSM is not supported"); } let num_fsm_blocks = 0; - timeline.put_truncation(RelishTag::Relation(rel), lsn, num_fsm_blocks)?; + self.put_rel_truncation(modification, rel, num_fsm_blocks)?; } if (rec.flags & pg_constants::SMGR_TRUNCATE_VM) != 0 { let rel = RelTag { @@ -606,7 +605,7 @@ impl WalIngest { info!("Partial truncation of VM is not supported"); } let num_vm_blocks = 0; - timeline.put_truncation(RelishTag::Relation(rel), lsn, num_vm_blocks)?; + self.put_rel_truncation(modification, rel, num_vm_blocks)?; } Ok(()) } @@ -615,8 +614,7 @@ impl WalIngest { /// fn ingest_xact_record( &mut self, - timeline: &dyn TimelineWriter, - lsn: Lsn, + modification: &mut DatadirModification, parsed: &XlXactParsedRecord, is_commit: bool, ) -> Result<()> { @@ -632,12 +630,9 @@ impl WalIngest { // This subxact goes to different page. Write the record // for all the XIDs on the previous page, and continue // accumulating XIDs on this new page. - timeline.put_wal_record( - lsn, - RelishTag::Slru { - slru: SlruKind::Clog, - segno, - }, + modification.put_slru_wal_record( + SlruKind::Clog, + segno, rpageno, if is_commit { ZenithWalRecord::ClogSetCommitted { xids: page_xids } @@ -652,12 +647,9 @@ impl WalIngest { rpageno = pageno % pg_constants::SLRU_PAGES_PER_SEGMENT; page_xids.push(*subxact); } - timeline.put_wal_record( - lsn, - RelishTag::Slru { - slru: SlruKind::Clog, - segno, - }, + modification.put_slru_wal_record( + SlruKind::Clog, + segno, rpageno, if is_commit { ZenithWalRecord::ClogSetCommitted { xids: page_xids } @@ -674,7 +666,10 @@ impl WalIngest { dbnode: xnode.dbnode, relnode: xnode.relnode, }; - timeline.drop_relish(RelishTag::Relation(rel), lsn)?; + let last_lsn = self.timeline.get_last_record_lsn(); + if modification.tline.get_rel_exists(rel, last_lsn)? { + self.put_rel_drop(modification, rel)?; + } } } Ok(()) @@ -682,13 +677,12 @@ impl WalIngest { fn ingest_clog_truncate_record( &mut self, - timeline: &dyn TimelineWriter, - lsn: Lsn, + modification: &mut DatadirModification, xlrec: &XlClogTruncate, ) -> Result<()> { info!( - "RM_CLOG_ID truncate pageno {} oldestXid {} oldestXidDB {} lsn {}", - xlrec.pageno, xlrec.oldest_xid, xlrec.oldest_xid_db, lsn + "RM_CLOG_ID truncate pageno {} oldestXid {} oldestXidDB {}", + xlrec.pageno, xlrec.oldest_xid, xlrec.oldest_xid_db ); // Here we treat oldestXid and oldestXidDB @@ -719,23 +713,20 @@ impl WalIngest { } // Iterate via SLRU CLOG segments and drop segments that we're ready to truncate - // TODO This implementation is very inefficient - - // it scans all non-rels only to find Clog // // We cannot pass 'lsn' to the Timeline.list_nonrels(), or it // will block waiting for the last valid LSN to advance up to // it. So we use the previous record's LSN in the get calls // instead. - let req_lsn = min(timeline.get_last_record_lsn(), lsn); - for obj in timeline.list_nonrels(req_lsn)? { - if let RelishTag::Slru { slru, segno } = obj { - if slru == SlruKind::Clog { - let segpage = segno * pg_constants::SLRU_PAGES_PER_SEGMENT; - if slru_may_delete_clogsegment(segpage, xlrec.pageno) { - timeline.drop_relish(RelishTag::Slru { slru, segno }, lsn)?; - trace!("Drop CLOG segment {:>04X} at lsn {}", segno, lsn); - } - } + let req_lsn = modification.tline.get_last_record_lsn(); + for segno in modification + .tline + .list_slru_segments(SlruKind::Clog, req_lsn)? + { + let segpage = segno * pg_constants::SLRU_PAGES_PER_SEGMENT; + if slru_may_delete_clogsegment(segpage, xlrec.pageno) { + modification.drop_slru_segment(SlruKind::Clog, segno)?; + trace!("Drop CLOG segment {:>04X}", segno); } } @@ -744,8 +735,7 @@ impl WalIngest { fn ingest_multixact_create_record( &mut self, - timeline: &dyn TimelineWriter, - lsn: Lsn, + modification: &mut DatadirModification, xlrec: &XlMultiXactCreate, ) -> Result<()> { // Create WAL record for updating the multixact-offsets page @@ -753,12 +743,9 @@ impl WalIngest { let segno = pageno / pg_constants::SLRU_PAGES_PER_SEGMENT; let rpageno = pageno % pg_constants::SLRU_PAGES_PER_SEGMENT; - timeline.put_wal_record( - lsn, - RelishTag::Slru { - slru: SlruKind::MultiXactOffsets, - segno, - }, + modification.put_slru_wal_record( + SlruKind::MultiXactOffsets, + segno, rpageno, ZenithWalRecord::MultixactOffsetCreate { mid: xlrec.mid, @@ -790,12 +777,9 @@ impl WalIngest { } let n_this_page = this_page_members.len(); - timeline.put_wal_record( - lsn, - RelishTag::Slru { - slru: SlruKind::MultiXactMembers, - segno: pageno / pg_constants::SLRU_PAGES_PER_SEGMENT, - }, + modification.put_slru_wal_record( + SlruKind::MultiXactMembers, + pageno / pg_constants::SLRU_PAGES_PER_SEGMENT, pageno % pg_constants::SLRU_PAGES_PER_SEGMENT, ZenithWalRecord::MultixactMembersCreate { moff: offset, @@ -830,8 +814,7 @@ impl WalIngest { fn ingest_multixact_truncate_record( &mut self, - timeline: &dyn TimelineWriter, - lsn: Lsn, + modification: &mut DatadirModification, xlrec: &XlMultiXactTruncate, ) -> Result<()> { self.checkpoint.oldestMulti = xlrec.end_trunc_off; @@ -847,13 +830,7 @@ impl WalIngest { // Delete all the segments except the last one. The last segment can still // contain, possibly partially, valid data. while segment != endsegment { - timeline.drop_relish( - RelishTag::Slru { - slru: SlruKind::MultiXactMembers, - segno: segment as u32, - }, - lsn, - )?; + modification.drop_slru_segment(SlruKind::MultiXactMembers, segment as u32)?; /* move to next segment, handling wraparound correctly */ if segment == maxsegment { @@ -871,22 +848,538 @@ impl WalIngest { fn ingest_relmap_page( &mut self, - timeline: &dyn TimelineWriter, - lsn: Lsn, + modification: &mut DatadirModification, xlrec: &XlRelmapUpdate, decoded: &DecodedWALRecord, ) -> Result<()> { - let tag = RelishTag::FileNodeMap { - spcnode: xlrec.tsid, - dbnode: xlrec.dbid, - }; - let mut buf = decoded.record.clone(); buf.advance(decoded.main_data_offset); // skip xl_relmap_update buf.advance(12); - timeline.put_page_image(tag, 0, lsn, Bytes::copy_from_slice(&buf[..]))?; + modification.put_relmap_file(xlrec.tsid, xlrec.dbid, Bytes::copy_from_slice(&buf[..]))?; + + Ok(()) + } + + fn put_rel_creation( + &mut self, + modification: &mut DatadirModification, + rel: RelTag, + ) -> Result<()> { + self.relsize_cache.insert(rel, 0); + modification.put_rel_creation(rel, 0)?; + Ok(()) + } + + fn put_rel_page_image( + &mut self, + modification: &mut DatadirModification, + rel: RelTag, + blknum: BlockNumber, + img: Bytes, + ) -> Result<()> { + self.handle_rel_extend(modification, rel, blknum)?; + modification.put_rel_page_image(rel, blknum, img)?; + Ok(()) + } + + fn put_rel_wal_record( + &mut self, + modification: &mut DatadirModification, + rel: RelTag, + blknum: BlockNumber, + rec: ZenithWalRecord, + ) -> Result<()> { + self.handle_rel_extend(modification, rel, blknum)?; + modification.put_rel_wal_record(rel, blknum, rec)?; + Ok(()) + } + + fn put_rel_truncation( + &mut self, + modification: &mut DatadirModification, + rel: RelTag, + nblocks: BlockNumber, + ) -> Result<()> { + modification.put_rel_truncation(rel, nblocks)?; + self.relsize_cache.insert(rel, nblocks); + Ok(()) + } + + fn put_rel_drop( + &mut self, + modification: &mut DatadirModification, + rel: RelTag, + ) -> Result<()> { + modification.put_rel_drop(rel)?; + self.relsize_cache.remove(&rel); + Ok(()) + } + + fn get_relsize(&mut self, rel: RelTag) -> Result { + if let Some(nblocks) = self.relsize_cache.get(&rel) { + Ok(*nblocks) + } else { + let last_lsn = self.timeline.get_last_record_lsn(); + let nblocks = if !self.timeline.get_rel_exists(rel, last_lsn)? { + 0 + } else { + self.timeline.get_rel_size(rel, last_lsn)? + }; + self.relsize_cache.insert(rel, nblocks); + Ok(nblocks) + } + } + + fn handle_rel_extend( + &mut self, + modification: &mut DatadirModification, + rel: RelTag, + blknum: BlockNumber, + ) -> Result<()> { + let new_nblocks = blknum + 1; + let old_nblocks = if let Some(nblocks) = self.relsize_cache.get(&rel) { + *nblocks + } else { + // Check if the relation exists. We implicitly create relations on first + // record. + // TODO: would be nice if to be more explicit about it + let last_lsn = self.timeline.get_last_record_lsn(); + let nblocks = if !self.timeline.get_rel_exists(rel, last_lsn)? { + // create it with 0 size initially, the logic below will extend it + modification.put_rel_creation(rel, 0)?; + 0 + } else { + self.timeline.get_rel_size(rel, last_lsn)? + }; + self.relsize_cache.insert(rel, nblocks); + nblocks + }; + + if new_nblocks > old_nblocks { + //info!("extending {} {} to {}", rel, old_nblocks, new_nblocks); + modification.put_rel_extend(rel, new_nblocks)?; + + // fill the gap with zeros + for gap_blknum in old_nblocks..blknum { + modification.put_rel_page_image(rel, gap_blknum, ZERO_PAGE.clone())?; + } + self.relsize_cache.insert(rel, new_nblocks); + } + Ok(()) + } + + fn put_slru_page_image( + &mut self, + modification: &mut DatadirModification, + kind: SlruKind, + segno: u32, + blknum: BlockNumber, + img: Bytes, + ) -> Result<()> { + self.handle_slru_extend(modification, kind, segno, blknum)?; + modification.put_slru_page_image(kind, segno, blknum, img)?; + Ok(()) + } + + fn handle_slru_extend( + &mut self, + modification: &mut DatadirModification, + kind: SlruKind, + segno: u32, + blknum: BlockNumber, + ) -> Result<()> { + // we don't use a cache for this like we do for relations. SLRUS are explcitly + // extended with ZEROPAGE records, not with commit records, so it happens + // a lot less frequently. + + let new_nblocks = blknum + 1; + // Check if the relation exists. We implicitly create relations on first + // record. + // TODO: would be nice if to be more explicit about it + let last_lsn = self.timeline.get_last_record_lsn(); + let old_nblocks = if !self + .timeline + .get_slru_segment_exists(kind, segno, last_lsn)? + { + // create it with 0 size initially, the logic below will extend it + modification.put_slru_segment_creation(kind, segno, 0)?; + 0 + } else { + self.timeline.get_slru_segment_size(kind, segno, last_lsn)? + }; + + if new_nblocks > old_nblocks { + trace!( + "extending SLRU {:?} seg {} from {} to {} blocks", + kind, + segno, + old_nblocks, + new_nblocks + ); + modification.put_slru_extend(kind, segno, new_nblocks)?; + + // fill the gap with zeros + for gap_blknum in old_nblocks..blknum { + modification.put_slru_page_image(kind, segno, gap_blknum, ZERO_PAGE.clone())?; + } + } + Ok(()) + } +} + +/// +/// Tests that should work the same with any Repository/Timeline implementation. +/// +#[allow(clippy::bool_assert_comparison)] +#[cfg(test)] +mod tests { + use super::*; + use crate::pgdatadir_mapping::create_test_timeline; + use crate::repository::repo_harness::*; + use postgres_ffi::pg_constants; + + /// Arbitrary relation tag, for testing. + const TESTREL_A: RelTag = RelTag { + spcnode: 0, + dbnode: 111, + relnode: 1000, + forknum: 0, + }; + + fn assert_current_logical_size(_timeline: &DatadirTimeline, _lsn: Lsn) { + // TODO + } + + static ZERO_CHECKPOINT: Bytes = Bytes::from_static(&[0u8; SIZEOF_CHECKPOINT]); + + fn init_walingest_test(tline: &DatadirTimeline) -> Result> { + let mut m = tline.begin_modification(Lsn(0x10)); + m.put_checkpoint(ZERO_CHECKPOINT.clone())?; + m.put_relmap_file(0, 111, Bytes::from(""))?; // dummy relmapper file + m.commit()?; + let walingest = WalIngest::new(tline, Lsn(0x10))?; + + Ok(walingest) + } + + #[test] + fn test_relsize() -> Result<()> { + let repo = RepoHarness::create("test_relsize")?.load(); + let tline = create_test_timeline(repo, TIMELINE_ID)?; + let mut walingest = init_walingest_test(&tline)?; + + let mut m = tline.begin_modification(Lsn(0x20)); + walingest.put_rel_creation(&mut m, TESTREL_A)?; + walingest.put_rel_page_image(&mut m, TESTREL_A, 0, TEST_IMG("foo blk 0 at 2"))?; + m.commit()?; + let mut m = tline.begin_modification(Lsn(0x30)); + walingest.put_rel_page_image(&mut m, TESTREL_A, 0, TEST_IMG("foo blk 0 at 3"))?; + m.commit()?; + let mut m = tline.begin_modification(Lsn(0x40)); + walingest.put_rel_page_image(&mut m, TESTREL_A, 1, TEST_IMG("foo blk 1 at 4"))?; + m.commit()?; + let mut m = tline.begin_modification(Lsn(0x50)); + walingest.put_rel_page_image(&mut m, TESTREL_A, 2, TEST_IMG("foo blk 2 at 5"))?; + m.commit()?; + + assert_current_logical_size(&tline, Lsn(0x50)); + + // The relation was created at LSN 2, not visible at LSN 1 yet. + assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x10))?, false); + assert!(tline.get_rel_size(TESTREL_A, Lsn(0x10)).is_err()); + + assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x20))?, true); + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x20))?, 1); + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x50))?, 3); + + // Check page contents at each LSN + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 0, Lsn(0x20))?, + TEST_IMG("foo blk 0 at 2") + ); + + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 0, Lsn(0x30))?, + TEST_IMG("foo blk 0 at 3") + ); + + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 0, Lsn(0x40))?, + TEST_IMG("foo blk 0 at 3") + ); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x40))?, + TEST_IMG("foo blk 1 at 4") + ); + + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 0, Lsn(0x50))?, + TEST_IMG("foo blk 0 at 3") + ); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x50))?, + TEST_IMG("foo blk 1 at 4") + ); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 2, Lsn(0x50))?, + TEST_IMG("foo blk 2 at 5") + ); + + // Truncate last block + let mut m = tline.begin_modification(Lsn(0x60)); + walingest.put_rel_truncation(&mut m, TESTREL_A, 2)?; + m.commit()?; + assert_current_logical_size(&tline, Lsn(0x60)); + + // Check reported size and contents after truncation + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x60))?, 2); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 0, Lsn(0x60))?, + TEST_IMG("foo blk 0 at 3") + ); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x60))?, + TEST_IMG("foo blk 1 at 4") + ); + + // should still see the truncated block with older LSN + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x50))?, 3); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 2, Lsn(0x50))?, + TEST_IMG("foo blk 2 at 5") + ); + + // Truncate to zero length + let mut m = tline.begin_modification(Lsn(0x68)); + walingest.put_rel_truncation(&mut m, TESTREL_A, 0)?; + m.commit()?; + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x68))?, 0); + + // Extend from 0 to 2 blocks, leaving a gap + let mut m = tline.begin_modification(Lsn(0x70)); + walingest.put_rel_page_image(&mut m, TESTREL_A, 1, TEST_IMG("foo blk 1"))?; + m.commit()?; + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x70))?, 2); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 0, Lsn(0x70))?, + ZERO_PAGE + ); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 1, Lsn(0x70))?, + TEST_IMG("foo blk 1") + ); + + // Extend a lot more, leaving a big gap that spans across segments + let mut m = tline.begin_modification(Lsn(0x80)); + walingest.put_rel_page_image(&mut m, TESTREL_A, 1500, TEST_IMG("foo blk 1500"))?; + m.commit()?; + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x80))?, 1501); + for blk in 2..1500 { + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, blk, Lsn(0x80))?, + ZERO_PAGE + ); + } + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, 1500, Lsn(0x80))?, + TEST_IMG("foo blk 1500") + ); + + Ok(()) + } + + // Test what happens if we dropped a relation + // and then created it again within the same layer. + #[test] + fn test_drop_extend() -> Result<()> { + let repo = RepoHarness::create("test_drop_extend")?.load(); + let tline = create_test_timeline(repo, TIMELINE_ID)?; + let mut walingest = init_walingest_test(&tline)?; + + let mut m = tline.begin_modification(Lsn(0x20)); + walingest.put_rel_page_image(&mut m, TESTREL_A, 0, TEST_IMG("foo blk 0 at 2"))?; + m.commit()?; + + // Check that rel exists and size is correct + assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x20))?, true); + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x20))?, 1); + + // Drop rel + let mut m = tline.begin_modification(Lsn(0x30)); + walingest.put_rel_drop(&mut m, TESTREL_A)?; + m.commit()?; + + // Check that rel is not visible anymore + assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x30))?, false); + + // FIXME: should fail + //assert!(tline.get_rel_size(TESTREL_A, Lsn(0x30))?.is_none()); + + // Re-create it + let mut m = tline.begin_modification(Lsn(0x40)); + walingest.put_rel_page_image(&mut m, TESTREL_A, 0, TEST_IMG("foo blk 0 at 4"))?; + m.commit()?; + + // Check that rel exists and size is correct + assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x40))?, true); + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x40))?, 1); + + Ok(()) + } + + // Test what happens if we truncated a relation + // so that one of its segments was dropped + // and then extended it again within the same layer. + #[test] + fn test_truncate_extend() -> Result<()> { + let repo = RepoHarness::create("test_truncate_extend")?.load(); + let tline = create_test_timeline(repo, TIMELINE_ID)?; + let mut walingest = init_walingest_test(&tline)?; + + // Create a 20 MB relation (the size is arbitrary) + let relsize = 20 * 1024 * 1024 / 8192; + let mut m = tline.begin_modification(Lsn(0x20)); + for blkno in 0..relsize { + let data = format!("foo blk {} at {}", blkno, Lsn(0x20)); + walingest.put_rel_page_image(&mut m, TESTREL_A, blkno, TEST_IMG(&data))?; + } + m.commit()?; + + // The relation was created at LSN 20, not visible at LSN 1 yet. + assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x10))?, false); + assert!(tline.get_rel_size(TESTREL_A, Lsn(0x10)).is_err()); + + assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x20))?, true); + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x20))?, relsize); + + // Check relation content + for blkno in 0..relsize { + let lsn = Lsn(0x20); + let data = format!("foo blk {} at {}", blkno, lsn); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, blkno, lsn)?, + TEST_IMG(&data) + ); + } + + // Truncate relation so that second segment was dropped + // - only leave one page + let mut m = tline.begin_modification(Lsn(0x60)); + walingest.put_rel_truncation(&mut m, TESTREL_A, 1)?; + m.commit()?; + + // Check reported size and contents after truncation + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x60))?, 1); + + for blkno in 0..1 { + let lsn = Lsn(0x20); + let data = format!("foo blk {} at {}", blkno, lsn); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, blkno, Lsn(0x60))?, + TEST_IMG(&data) + ); + } + + // should still see all blocks with older LSN + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x50))?, relsize); + for blkno in 0..relsize { + let lsn = Lsn(0x20); + let data = format!("foo blk {} at {}", blkno, lsn); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, blkno, Lsn(0x50))?, + TEST_IMG(&data) + ); + } + + // Extend relation again. + // Add enough blocks to create second segment + let lsn = Lsn(0x80); + let mut m = tline.begin_modification(lsn); + for blkno in 0..relsize { + let data = format!("foo blk {} at {}", blkno, lsn); + walingest.put_rel_page_image(&mut m, TESTREL_A, blkno, TEST_IMG(&data))?; + } + m.commit()?; + + assert_eq!(tline.get_rel_exists(TESTREL_A, Lsn(0x80))?, true); + assert_eq!(tline.get_rel_size(TESTREL_A, Lsn(0x80))?, relsize); + // Check relation content + for blkno in 0..relsize { + let lsn = Lsn(0x80); + let data = format!("foo blk {} at {}", blkno, lsn); + assert_eq!( + tline.get_rel_page_at_lsn(TESTREL_A, blkno, Lsn(0x80))?, + TEST_IMG(&data) + ); + } + + Ok(()) + } + + /// Test get_relsize() and truncation with a file larger than 1 GB, so that it's + /// split into multiple 1 GB segments in Postgres. + #[test] + fn test_large_rel() -> Result<()> { + let repo = RepoHarness::create("test_large_rel")?.load(); + let tline = create_test_timeline(repo, TIMELINE_ID)?; + let mut walingest = init_walingest_test(&tline)?; + + let mut lsn = 0x10; + for blknum in 0..pg_constants::RELSEG_SIZE + 1 { + lsn += 0x10; + let mut m = tline.begin_modification(Lsn(lsn)); + let img = TEST_IMG(&format!("foo blk {} at {}", blknum, Lsn(lsn))); + walingest.put_rel_page_image(&mut m, TESTREL_A, blknum as BlockNumber, img)?; + m.commit()?; + } + + assert_current_logical_size(&tline, Lsn(lsn)); + + assert_eq!( + tline.get_rel_size(TESTREL_A, Lsn(lsn))?, + pg_constants::RELSEG_SIZE + 1 + ); + + // Truncate one block + lsn += 0x10; + let mut m = tline.begin_modification(Lsn(lsn)); + walingest.put_rel_truncation(&mut m, TESTREL_A, pg_constants::RELSEG_SIZE)?; + m.commit()?; + assert_eq!( + tline.get_rel_size(TESTREL_A, Lsn(lsn))?, + pg_constants::RELSEG_SIZE + ); + assert_current_logical_size(&tline, Lsn(lsn)); + + // Truncate another block + lsn += 0x10; + let mut m = tline.begin_modification(Lsn(lsn)); + walingest.put_rel_truncation(&mut m, TESTREL_A, pg_constants::RELSEG_SIZE - 1)?; + m.commit()?; + assert_eq!( + tline.get_rel_size(TESTREL_A, Lsn(lsn))?, + pg_constants::RELSEG_SIZE - 1 + ); + assert_current_logical_size(&tline, Lsn(lsn)); + + // Truncate to 1500, and then truncate all the way down to 0, one block at a time + // This tests the behavior at segment boundaries + let mut size: i32 = 3000; + while size >= 0 { + lsn += 0x10; + let mut m = tline.begin_modification(Lsn(lsn)); + walingest.put_rel_truncation(&mut m, TESTREL_A, size as BlockNumber)?; + m.commit()?; + assert_eq!( + tline.get_rel_size(TESTREL_A, Lsn(lsn))?, + size as BlockNumber + ); + + size -= 1; + } + assert_current_logical_size(&tline, Lsn(lsn)); Ok(()) } diff --git a/pageserver/src/walreceiver.rs b/pageserver/src/walreceiver.rs index 2c10ad315b..e382475627 100644 --- a/pageserver/src/walreceiver.rs +++ b/pageserver/src/walreceiver.rs @@ -6,6 +6,7 @@ //! We keep one WAL receiver active per timeline. use crate::config::PageServerConf; +use crate::repository::{Repository, Timeline}; use crate::tenant_mgr; use crate::thread_mgr; use crate::thread_mgr::ThreadKind; @@ -182,13 +183,13 @@ fn walreceiver_main( let repo = tenant_mgr::get_repository_for_tenant(tenant_id) .with_context(|| format!("no repository found for tenant {}", tenant_id))?; - let timeline = repo.get_timeline_load(timeline_id).with_context(|| { - format!( - "local timeline {} not found for tenant {}", - timeline_id, tenant_id - ) - })?; - + let timeline = + tenant_mgr::get_timeline_for_tenant_load(tenant_id, timeline_id).with_context(|| { + format!( + "local timeline {} not found for tenant {}", + timeline_id, tenant_id + ) + })?; let remote_index = repo.get_remote_index(); // @@ -251,11 +252,10 @@ fn walreceiver_main( // It is important to deal with the aligned records as lsn in getPage@LSN is // aligned and can be several bytes bigger. Without this alignment we are - // at risk of hittind a deadlock. + // at risk of hitting a deadlock. anyhow::ensure!(lsn.is_aligned()); - let writer = timeline.writer(); - walingest.ingest_record(writer.as_ref(), recdata, lsn)?; + walingest.ingest_record(&timeline, recdata, lsn)?; fail_point!("walreceiver-after-ingest"); @@ -267,6 +267,8 @@ fn walreceiver_main( caught_up = true; } + timeline.tline.check_checkpoint_distance()?; + Some(endlsn) } @@ -310,7 +312,7 @@ fn walreceiver_main( // The last LSN we processed. It is not guaranteed to survive pageserver crash. let write_lsn = u64::from(last_lsn); // `disk_consistent_lsn` is the LSN at which page server guarantees local persistence of all received data - let flush_lsn = u64::from(timeline.get_disk_consistent_lsn()); + let flush_lsn = u64::from(timeline.tline.get_disk_consistent_lsn()); // The last LSN that is synced to remote storage and is guaranteed to survive pageserver crash // Used by safekeepers to remove WAL preceding `remote_consistent_lsn`. let apply_lsn = u64::from(timeline_remote_consistent_lsn); diff --git a/pageserver/src/walrecord.rs b/pageserver/src/walrecord.rs index ca9107cdbf..5947a0c147 100644 --- a/pageserver/src/walrecord.rs +++ b/pageserver/src/walrecord.rs @@ -10,7 +10,47 @@ use postgres_ffi::{MultiXactId, MultiXactOffset, MultiXactStatus, Oid, Transacti use serde::{Deserialize, Serialize}; use tracing::*; -use crate::repository::ZenithWalRecord; +/// Each update to a page is represented by a ZenithWalRecord. It can be a wrapper +/// around a PostgreSQL WAL record, or a custom zenith-specific "record". +#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)] +pub enum ZenithWalRecord { + /// Native PostgreSQL WAL record + Postgres { will_init: bool, rec: Bytes }, + + /// Clear bits in heap visibility map. ('flags' is bitmap of bits to clear) + ClearVisibilityMapFlags { + new_heap_blkno: Option, + old_heap_blkno: Option, + flags: u8, + }, + /// Mark transaction IDs as committed on a CLOG page + ClogSetCommitted { xids: Vec }, + /// Mark transaction IDs as aborted on a CLOG page + ClogSetAborted { xids: Vec }, + /// Extend multixact offsets SLRU + MultixactOffsetCreate { + mid: MultiXactId, + moff: MultiXactOffset, + }, + /// Extend multixact members SLRU. + MultixactMembersCreate { + moff: MultiXactOffset, + members: Vec, + }, +} + +impl ZenithWalRecord { + /// Does replaying this WAL record initialize the page from scratch, or does + /// it need to be applied over the previous image of the page? + pub fn will_init(&self) -> bool { + match self { + ZenithWalRecord::Postgres { will_init, rec: _ } => *will_init, + + // None of the special zenith record types currently initialize the page + _ => false, + } + } +} /// DecodedBkpBlock represents per-page data contained in a WAL record. #[derive(Default)] @@ -87,6 +127,28 @@ impl XlRelmapUpdate { } } +#[repr(C)] +#[derive(Debug)] +pub struct XlSmgrCreate { + pub rnode: RelFileNode, + // FIXME: This is ForkNumber in storage_xlog.h. That's an enum. Does it have + // well-defined size? + pub forknum: u8, +} + +impl XlSmgrCreate { + pub fn decode(buf: &mut Bytes) -> XlSmgrCreate { + XlSmgrCreate { + rnode: RelFileNode { + spcnode: buf.get_u32_le(), /* tablespace */ + dbnode: buf.get_u32_le(), /* database */ + relnode: buf.get_u32_le(), /* relation */ + }, + forknum: buf.get_u32_le() as u8, + } + } +} + #[repr(C)] #[derive(Debug)] pub struct XlSmgrTruncate { diff --git a/pageserver/src/walredo.rs b/pageserver/src/walredo.rs index 704b8f2583..ae22f1eead 100644 --- a/pageserver/src/walredo.rs +++ b/pageserver/src/walredo.rs @@ -42,8 +42,10 @@ use zenith_utils::nonblock::set_nonblock; use zenith_utils::zid::ZTenantId; use crate::config::PageServerConf; -use crate::relish::*; -use crate::repository::ZenithWalRecord; +use crate::pgdatadir_mapping::{key_to_rel_block, key_to_slru_block}; +use crate::reltag::{RelTag, SlruKind}; +use crate::repository::Key; +use crate::walrecord::ZenithWalRecord; use postgres_ffi::nonrelfile_utils::mx_offset_to_flags_bitshift; use postgres_ffi::nonrelfile_utils::mx_offset_to_flags_offset; use postgres_ffi::nonrelfile_utils::mx_offset_to_member_offset; @@ -75,8 +77,7 @@ pub trait WalRedoManager: Send + Sync { /// the reords. fn request_redo( &self, - rel: RelishTag, - blknum: u32, + key: Key, lsn: Lsn, base_img: Option, records: Vec<(Lsn, ZenithWalRecord)>, @@ -92,8 +93,7 @@ pub struct DummyRedoManager {} impl crate::walredo::WalRedoManager for DummyRedoManager { fn request_redo( &self, - _rel: RelishTag, - _blknum: u32, + _key: Key, _lsn: Lsn, _base_img: Option, _records: Vec<(Lsn, ZenithWalRecord)>, @@ -152,28 +152,6 @@ fn can_apply_in_zenith(rec: &ZenithWalRecord) -> bool { } } -fn check_forknum(rel: &RelishTag, expected_forknum: u8) -> bool { - if let RelishTag::Relation(RelTag { - forknum, - spcnode: _, - dbnode: _, - relnode: _, - }) = rel - { - *forknum == expected_forknum - } else { - false - } -} - -fn check_slru_segno(rel: &RelishTag, expected_slru: SlruKind, expected_segno: u32) -> bool { - if let RelishTag::Slru { slru, segno } = rel { - *slru == expected_slru && *segno == expected_segno - } else { - false - } -} - /// An error happened in WAL redo #[derive(Debug, thiserror::Error)] pub enum WalRedoError { @@ -184,6 +162,8 @@ pub enum WalRedoError { InvalidState, #[error("cannot perform WAL redo for this request")] InvalidRequest, + #[error("cannot perform WAL redo for this record")] + InvalidRecord, } /// @@ -198,8 +178,7 @@ impl WalRedoManager for PostgresRedoManager { /// fn request_redo( &self, - rel: RelishTag, - blknum: u32, + key: Key, lsn: Lsn, base_img: Option, records: Vec<(Lsn, ZenithWalRecord)>, @@ -217,11 +196,10 @@ impl WalRedoManager for PostgresRedoManager { if rec_zenith != batch_zenith { let result = if batch_zenith { - self.apply_batch_zenith(rel, blknum, lsn, img, &records[batch_start..i]) + self.apply_batch_zenith(key, lsn, img, &records[batch_start..i]) } else { self.apply_batch_postgres( - rel, - blknum, + key, lsn, img, &records[batch_start..i], @@ -236,11 +214,10 @@ impl WalRedoManager for PostgresRedoManager { } // last batch if batch_zenith { - self.apply_batch_zenith(rel, blknum, lsn, img, &records[batch_start..]) + self.apply_batch_zenith(key, lsn, img, &records[batch_start..]) } else { self.apply_batch_postgres( - rel, - blknum, + key, lsn, img, &records[batch_start..], @@ -268,16 +245,15 @@ impl PostgresRedoManager { /// fn apply_batch_postgres( &self, - rel: RelishTag, - blknum: u32, + key: Key, lsn: Lsn, base_img: Option, records: &[(Lsn, ZenithWalRecord)], wal_redo_timeout: Duration, ) -> Result { - let start_time = Instant::now(); + let (rel, blknum) = key_to_rel_block(key).or(Err(WalRedoError::InvalidRecord))?; - let apply_result: Result; + let start_time = Instant::now(); let mut process_guard = self.process.lock().unwrap(); let lock_time = Instant::now(); @@ -291,16 +267,11 @@ impl PostgresRedoManager { WAL_REDO_WAIT_TIME.observe(lock_time.duration_since(start_time).as_secs_f64()); - let result = if let RelishTag::Relation(rel) = rel { - // Relational WAL records are applied using wal-redo-postgres - let buf_tag = BufferTag { rel, blknum }; - apply_result = process.apply_wal_records(buf_tag, base_img, records, wal_redo_timeout); - - apply_result.map_err(WalRedoError::IoError) - } else { - error!("unexpected non-relation relish: {:?}", rel); - Err(WalRedoError::InvalidRequest) - }; + // Relational WAL records are applied using wal-redo-postgres + let buf_tag = BufferTag { rel, blknum }; + let result = process + .apply_wal_records(buf_tag, base_img, records, wal_redo_timeout) + .map_err(WalRedoError::IoError); let end_time = Instant::now(); let duration = end_time.duration_since(lock_time); @@ -326,8 +297,7 @@ impl PostgresRedoManager { /// fn apply_batch_zenith( &self, - rel: RelishTag, - blknum: u32, + key: Key, lsn: Lsn, base_img: Option, records: &[(Lsn, ZenithWalRecord)], @@ -346,7 +316,7 @@ impl PostgresRedoManager { // Apply all the WAL records in the batch for (record_lsn, record) in records.iter() { - self.apply_record_zenith(rel, blknum, &mut page, *record_lsn, record)?; + self.apply_record_zenith(key, &mut page, *record_lsn, record)?; } // Success! let end_time = Instant::now(); @@ -365,8 +335,7 @@ impl PostgresRedoManager { fn apply_record_zenith( &self, - rel: RelishTag, - blknum: u32, + key: Key, page: &mut BytesMut, _record_lsn: Lsn, record: &ZenithWalRecord, @@ -384,10 +353,11 @@ impl PostgresRedoManager { old_heap_blkno, flags, } => { - // sanity check that this is modifying the correct relish + // sanity check that this is modifying the correct relation + let (rel, blknum) = key_to_rel_block(key).or(Err(WalRedoError::InvalidRecord))?; assert!( - check_forknum(&rel, pg_constants::VISIBILITYMAP_FORKNUM), - "ClearVisibilityMapFlags record on unexpected rel {:?}", + rel.forknum == pg_constants::VISIBILITYMAP_FORKNUM, + "ClearVisibilityMapFlags record on unexpected rel {}", rel ); if let Some(heap_blkno) = *new_heap_blkno { @@ -421,6 +391,14 @@ impl PostgresRedoManager { // Non-relational WAL records are handled here, with custom code that has the // same effects as the corresponding Postgres WAL redo function. ZenithWalRecord::ClogSetCommitted { xids } => { + let (slru_kind, segno, blknum) = + key_to_slru_block(key).or(Err(WalRedoError::InvalidRecord))?; + assert_eq!( + slru_kind, + SlruKind::Clog, + "ClogSetCommitted record with unexpected key {}", + key + ); for &xid in xids { let pageno = xid as u32 / pg_constants::CLOG_XACTS_PER_PAGE; let expected_segno = pageno / pg_constants::SLRU_PAGES_PER_SEGMENT; @@ -428,12 +406,17 @@ impl PostgresRedoManager { // Check that we're modifying the correct CLOG block. assert!( - check_slru_segno(&rel, SlruKind::Clog, expected_segno), - "ClogSetCommitted record for XID {} with unexpected rel {:?}", + segno == expected_segno, + "ClogSetCommitted record for XID {} with unexpected key {}", xid, - rel + key + ); + assert!( + blknum == expected_blknum, + "ClogSetCommitted record for XID {} with unexpected key {}", + xid, + key ); - assert!(blknum == expected_blknum); transaction_id_set_status( xid, @@ -443,6 +426,14 @@ impl PostgresRedoManager { } } ZenithWalRecord::ClogSetAborted { xids } => { + let (slru_kind, segno, blknum) = + key_to_slru_block(key).or(Err(WalRedoError::InvalidRecord))?; + assert_eq!( + slru_kind, + SlruKind::Clog, + "ClogSetAborted record with unexpected key {}", + key + ); for &xid in xids { let pageno = xid as u32 / pg_constants::CLOG_XACTS_PER_PAGE; let expected_segno = pageno / pg_constants::SLRU_PAGES_PER_SEGMENT; @@ -450,17 +441,30 @@ impl PostgresRedoManager { // Check that we're modifying the correct CLOG block. assert!( - check_slru_segno(&rel, SlruKind::Clog, expected_segno), - "ClogSetCommitted record for XID {} with unexpected rel {:?}", + segno == expected_segno, + "ClogSetAborted record for XID {} with unexpected key {}", xid, - rel + key + ); + assert!( + blknum == expected_blknum, + "ClogSetAborted record for XID {} with unexpected key {}", + xid, + key ); - assert!(blknum == expected_blknum); transaction_id_set_status(xid, pg_constants::TRANSACTION_STATUS_ABORTED, page); } } ZenithWalRecord::MultixactOffsetCreate { mid, moff } => { + let (slru_kind, segno, blknum) = + key_to_slru_block(key).or(Err(WalRedoError::InvalidRecord))?; + assert_eq!( + slru_kind, + SlruKind::MultiXactOffsets, + "MultixactOffsetCreate record with unexpected key {}", + key + ); // Compute the block and offset to modify. // See RecordNewMultiXact in PostgreSQL sources. let pageno = mid / pg_constants::MULTIXACT_OFFSETS_PER_PAGE as u32; @@ -471,16 +475,29 @@ impl PostgresRedoManager { let expected_segno = pageno / pg_constants::SLRU_PAGES_PER_SEGMENT; let expected_blknum = pageno % pg_constants::SLRU_PAGES_PER_SEGMENT; assert!( - check_slru_segno(&rel, SlruKind::MultiXactOffsets, expected_segno), - "MultiXactOffsetsCreate record for multi-xid {} with unexpected rel {:?}", + segno == expected_segno, + "MultiXactOffsetsCreate record for multi-xid {} with unexpected key {}", mid, - rel + key + ); + assert!( + blknum == expected_blknum, + "MultiXactOffsetsCreate record for multi-xid {} with unexpected key {}", + mid, + key ); - assert!(blknum == expected_blknum); LittleEndian::write_u32(&mut page[offset..offset + 4], *moff); } ZenithWalRecord::MultixactMembersCreate { moff, members } => { + let (slru_kind, segno, blknum) = + key_to_slru_block(key).or(Err(WalRedoError::InvalidRecord))?; + assert_eq!( + slru_kind, + SlruKind::MultiXactMembers, + "MultixactMembersCreate record with unexpected key {}", + key + ); for (i, member) in members.iter().enumerate() { let offset = moff + i as u32; @@ -495,12 +512,17 @@ impl PostgresRedoManager { let expected_segno = pageno / pg_constants::SLRU_PAGES_PER_SEGMENT; let expected_blknum = pageno % pg_constants::SLRU_PAGES_PER_SEGMENT; assert!( - check_slru_segno(&rel, SlruKind::MultiXactMembers, expected_segno), - "MultiXactMembersCreate record at offset {} with unexpected rel {:?}", + segno == expected_segno, + "MultiXactMembersCreate record for offset {} with unexpected key {}", moff, - rel + key + ); + assert!( + blknum == expected_blknum, + "MultiXactMembersCreate record for offset {} with unexpected key {}", + moff, + key ); - assert!(blknum == expected_blknum); let mut flagsval = LittleEndian::read_u32(&page[flagsoff..flagsoff + 4]); flagsval &= !(((1 << pg_constants::MXACT_MEMBER_BITS_PER_XACT) - 1) << bshift); diff --git a/postgres_ffi/src/pg_constants.rs b/postgres_ffi/src/pg_constants.rs index 76f837cefc..7230b841f5 100644 --- a/postgres_ffi/src/pg_constants.rs +++ b/postgres_ffi/src/pg_constants.rs @@ -24,6 +24,9 @@ pub const VISIBILITYMAP_FORKNUM: u8 = 2; pub const INIT_FORKNUM: u8 = 3; // From storage_xlog.h +pub const XLOG_SMGR_CREATE: u8 = 0x10; +pub const XLOG_SMGR_TRUNCATE: u8 = 0x20; + pub const SMGR_TRUNCATE_HEAP: u32 = 0x0001; pub const SMGR_TRUNCATE_VM: u32 = 0x0002; pub const SMGR_TRUNCATE_FSM: u32 = 0x0004; @@ -113,7 +116,6 @@ pub const XACT_XINFO_HAS_TWOPHASE: u32 = 1u32 << 4; // From pg_control.h and rmgrlist.h pub const XLOG_NEXTOID: u8 = 0x30; pub const XLOG_SWITCH: u8 = 0x40; -pub const XLOG_SMGR_TRUNCATE: u8 = 0x20; pub const XLOG_FPI_FOR_HINT: u8 = 0xA0; pub const XLOG_FPI: u8 = 0xB0; pub const DB_SHUTDOWNED: u32 = 1; diff --git a/test_runner/batch_others/test_snapfiles_gc.py b/test_runner/batch_others/test_snapfiles_gc.py deleted file mode 100644 index d00af53864..0000000000 --- a/test_runner/batch_others/test_snapfiles_gc.py +++ /dev/null @@ -1,130 +0,0 @@ -from contextlib import closing -import psycopg2.extras -from fixtures.utils import print_gc_result -from fixtures.zenith_fixtures import ZenithEnv -from fixtures.log_helper import log - - -# -# Test Garbage Collection of old layer files -# -# This test is pretty tightly coupled with the current implementation of layered -# storage, in layered_repository.rs. -# -def test_layerfiles_gc(zenith_simple_env: ZenithEnv): - env = zenith_simple_env - env.zenith_cli.create_branch("test_layerfiles_gc", "empty") - pg = env.postgres.create_start('test_layerfiles_gc') - - with closing(pg.connect()) as conn: - with conn.cursor() as cur: - with closing(env.pageserver.connect()) as psconn: - with psconn.cursor(cursor_factory=psycopg2.extras.DictCursor) as pscur: - - # Get the timeline ID of our branch. We need it for the 'do_gc' command - cur.execute("SHOW zenith.zenith_timeline") - timeline = cur.fetchone()[0] - - # Create a test table - cur.execute("CREATE TABLE foo(x integer)") - cur.execute("INSERT INTO foo VALUES (1)") - - cur.execute("select relfilenode from pg_class where oid = 'foo'::regclass") - row = cur.fetchone() - log.info(f"relfilenode is {row[0]}") - - # Run GC, to clear out any garbage left behind in the catalogs by - # the CREATE TABLE command. We want to have a clean slate with no garbage - # before running the actual tests below, otherwise the counts won't match - # what we expect. - # - # Also run vacuum first to make it less likely that autovacuum or pruning - # kicks in and confuses our numbers. - cur.execute("VACUUM") - - # delete the row, to update the Visibility Map. We don't want the VM - # update to confuse our numbers either. - cur.execute("DELETE FROM foo") - - log.info("Running GC before test") - pscur.execute(f"do_gc {env.initial_tenant.hex} {timeline} 0") - row = pscur.fetchone() - print_gc_result(row) - # remember the number of files - layer_relfiles_remain = (row['layer_relfiles_total'] - - row['layer_relfiles_removed']) - assert layer_relfiles_remain > 0 - - # Insert a row and run GC. Checkpoint should freeze the layer - # so that there is only the most recent image layer left for the rel, - # removing the old image and delta layer. - log.info("Inserting one row and running GC") - cur.execute("INSERT INTO foo VALUES (1)") - pscur.execute(f"do_gc {env.initial_tenant.hex} {timeline} 0") - row = pscur.fetchone() - print_gc_result(row) - assert row['layer_relfiles_total'] == layer_relfiles_remain + 2 - assert row['layer_relfiles_removed'] == 2 - assert row['layer_relfiles_dropped'] == 0 - - # Insert two more rows and run GC. - # This should create new image and delta layer file with the new contents, and - # then remove the old one image and the just-created delta layer. - log.info("Inserting two more rows and running GC") - cur.execute("INSERT INTO foo VALUES (2)") - cur.execute("INSERT INTO foo VALUES (3)") - - pscur.execute(f"do_gc {env.initial_tenant.hex} {timeline} 0") - row = pscur.fetchone() - print_gc_result(row) - assert row['layer_relfiles_total'] == layer_relfiles_remain + 2 - assert row['layer_relfiles_removed'] == 2 - assert row['layer_relfiles_dropped'] == 0 - - # Do it again. Should again create two new layer files and remove old ones. - log.info("Inserting two more rows and running GC") - cur.execute("INSERT INTO foo VALUES (2)") - cur.execute("INSERT INTO foo VALUES (3)") - - pscur.execute(f"do_gc {env.initial_tenant.hex} {timeline} 0") - row = pscur.fetchone() - print_gc_result(row) - assert row['layer_relfiles_total'] == layer_relfiles_remain + 2 - assert row['layer_relfiles_removed'] == 2 - assert row['layer_relfiles_dropped'] == 0 - - # Run GC again, with no changes in the database. Should not remove anything. - log.info("Run GC again, with nothing to do") - pscur.execute(f"do_gc {env.initial_tenant.hex} {timeline} 0") - row = pscur.fetchone() - print_gc_result(row) - assert row['layer_relfiles_total'] == layer_relfiles_remain - assert row['layer_relfiles_removed'] == 0 - assert row['layer_relfiles_dropped'] == 0 - - # - # Test DROP TABLE checks that relation data and metadata was deleted by GC from object storage - # - log.info("Drop table and run GC again") - cur.execute("DROP TABLE foo") - - pscur.execute(f"do_gc {env.initial_tenant.hex} {timeline} 0") - row = pscur.fetchone() - print_gc_result(row) - - # We still cannot remove the latest layers - # because they serve as tombstones for earlier layers. - assert row['layer_relfiles_dropped'] == 0 - # Each relation fork is counted separately, hence 3. - assert row['layer_relfiles_needed_as_tombstone'] == 3 - - # The catalog updates also create new layer files of the catalogs, which - # are counted as 'removed' - assert row['layer_relfiles_removed'] > 0 - - # TODO Change the test to check actual CG of dropped layers. - # Each relation fork is counted separately, hence 3. - #assert row['layer_relfiles_dropped'] == 3 - - # TODO: perhaps we should count catalog and user relations separately, - # to make this kind of testing more robust diff --git a/test_runner/fixtures/utils.py b/test_runner/fixtures/utils.py index 236c225bfb..58f7294eb5 100644 --- a/test_runner/fixtures/utils.py +++ b/test_runner/fixtures/utils.py @@ -74,8 +74,5 @@ def lsn_from_hex(lsn_hex: str) -> int: def print_gc_result(row): log.info("GC duration {elapsed} ms".format_map(row)) log.info( - " REL total: {layer_relfiles_total}, needed_by_cutoff {layer_relfiles_needed_by_cutoff}, needed_by_branches: {layer_relfiles_needed_by_branches}, not_updated: {layer_relfiles_not_updated}, needed_as_tombstone {layer_relfiles_needed_as_tombstone}, removed: {layer_relfiles_removed}, dropped: {layer_relfiles_dropped}" - .format_map(row)) - log.info( - " NONREL total: {layer_nonrelfiles_total}, needed_by_cutoff {layer_nonrelfiles_needed_by_cutoff}, needed_by_branches: {layer_nonrelfiles_needed_by_branches}, not_updated: {layer_nonrelfiles_not_updated}, needed_as_tombstone {layer_nonrelfiles_needed_as_tombstone}, removed: {layer_nonrelfiles_removed}, dropped: {layer_nonrelfiles_dropped}" + " total: {layers_total}, needed_by_cutoff {layers_needed_by_cutoff}, needed_by_branches: {layers_needed_by_branches}, not_updated: {layers_not_updated}, removed: {layers_removed}" .format_map(row)) diff --git a/vendor/postgres b/vendor/postgres index 093aa160e5..756a01aade 160000 --- a/vendor/postgres +++ b/vendor/postgres @@ -1 +1 @@ -Subproject commit 093aa160e5df19814ff19b995d36dd5ee03c7f8b +Subproject commit 756a01aade765d1d2ac115e7e189865ff697222b From 75002adc14b93a0c80b124f3677c04ae072dd739 Mon Sep 17 00:00:00 2001 From: Arseny Sher Date: Mon, 28 Mar 2022 18:27:28 +0400 Subject: [PATCH 34/83] Make shared_buffers large in test_pageserver_catchup. We intentionally write while pageserver is down, so we shouldn't query it. Noticed by @petuhovskiy at https://github.com/zenithdb/postgres/pull/141#issuecomment-1080261700 --- test_runner/batch_others/test_pageserver_catchup.py | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/test_runner/batch_others/test_pageserver_catchup.py b/test_runner/batch_others/test_pageserver_catchup.py index 3c4b7f9569..758b018046 100644 --- a/test_runner/batch_others/test_pageserver_catchup.py +++ b/test_runner/batch_others/test_pageserver_catchup.py @@ -10,7 +10,9 @@ def test_pageserver_catchup_while_compute_down(zenith_env_builder: ZenithEnvBuil env = zenith_env_builder.init_start() env.zenith_cli.create_branch('test_pageserver_catchup_while_compute_down') - pg = env.postgres.create_start('test_pageserver_catchup_while_compute_down') + # Make shared_buffers large to ensure we won't query pageserver while it is down. + pg = env.postgres.create_start('test_pageserver_catchup_while_compute_down', + config_lines=['shared_buffers=512MB']) pg_conn = pg.connect() cur = pg_conn.cursor() From 780b46ad270c66960f3f4de8468891b4b030507e Mon Sep 17 00:00:00 2001 From: Arseny Sher Date: Mon, 28 Mar 2022 18:11:48 +0400 Subject: [PATCH 35/83] Bump vendor/postgres to fix commit_lsn going backwards. --- vendor/postgres | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/vendor/postgres b/vendor/postgres index 756a01aade..19164aeacf 160000 --- a/vendor/postgres +++ b/vendor/postgres @@ -1 +1 @@ -Subproject commit 756a01aade765d1d2ac115e7e189865ff697222b +Subproject commit 19164aeacfd877ef75d67e70a71647f5d4c0cd2f From a8832024953d3bb6da5da76f8dd2007433119b87 Mon Sep 17 00:00:00 2001 From: Alexey Kondratov Date: Mon, 28 Mar 2022 18:56:36 +0300 Subject: [PATCH 36/83] Enable S3 for pageserver on staging Follow-up for #1417. Previously we had a problem uploading to S3 due to huge ammount of existing not yet uploaded data. Now we have a fresh pageserver with LSM storage on staging, so we can try enabling it once again. --- .circleci/ansible/deploy.yaml | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) diff --git a/.circleci/ansible/deploy.yaml b/.circleci/ansible/deploy.yaml index 020a852a00..09aca8539e 100644 --- a/.circleci/ansible/deploy.yaml +++ b/.circleci/ansible/deploy.yaml @@ -63,20 +63,19 @@ tags: - pageserver - # Temporary disabled until LSM storage rewrite lands - # - name: update config - # when: current_version > remote_version or force_deploy - # lineinfile: - # path: /storage/pageserver/data/pageserver.toml - # line: "{{ item }}" - # loop: - # - "[remote_storage]" - # - "bucket_name = '{{ bucket_name }}'" - # - "bucket_region = '{{ bucket_region }}'" - # - "prefix_in_bucket = '{{ inventory_hostname }}'" - # become: true - # tags: - # - pageserver + - name: update remote storage (s3) config + when: current_version > remote_version or force_deploy + lineinfile: + path: /storage/pageserver/data/pageserver.toml + line: "{{ item }}" + loop: + - "[remote_storage]" + - "bucket_name = '{{ bucket_name }}'" + - "bucket_region = '{{ bucket_region }}'" + - "prefix_in_bucket = '{{ inventory_hostname }}'" + become: true + tags: + - pageserver - name: upload systemd service definition ansible.builtin.template: From 8a901de52a270b8bf8a97a256527037fb0031276 Mon Sep 17 00:00:00 2001 From: Arthur Petukhovsky Date: Sat, 12 Mar 2022 20:28:44 +0000 Subject: [PATCH 37/83] Refactor control file update at safekeeper. Record global_commit_lsn, have common routine for control file update, add SafekeeperMemstate. --- walkeeper/src/safekeeper.rs | 133 +++++++++++++++++++++++------------- walkeeper/src/timeline.rs | 4 +- 2 files changed, 87 insertions(+), 50 deletions(-) diff --git a/walkeeper/src/safekeeper.rs b/walkeeper/src/safekeeper.rs index 53fd6f5588..8300b32b42 100644 --- a/walkeeper/src/safekeeper.rs +++ b/walkeeper/src/safekeeper.rs @@ -202,6 +202,14 @@ pub struct SafeKeeperState { pub peers: Peers, } +#[derive(Debug, Clone)] +// In memory safekeeper state. Fields mirror ones in `SafeKeeperState`; they are +// not flushed yet. +pub struct SafekeeperMemState { + pub commit_lsn: Lsn, + pub peer_horizon_lsn: Lsn, +} + impl SafeKeeperState { pub fn new(zttid: &ZTenantTimelineId, peers: Vec) -> SafeKeeperState { SafeKeeperState { @@ -470,14 +478,12 @@ struct SafeKeeperMetrics { } impl SafeKeeperMetrics { - fn new(tenant_id: ZTenantId, timeline_id: ZTimelineId, commit_lsn: Lsn) -> Self { + fn new(tenant_id: ZTenantId, timeline_id: ZTimelineId) -> Self { let tenant_id = tenant_id.to_string(); let timeline_id = timeline_id.to_string(); - let m = Self { + Self { commit_lsn: COMMIT_LSN_GAUGE.with_label_values(&[&tenant_id, &timeline_id]), - }; - m.commit_lsn.set(u64::from(commit_lsn) as f64); - m + } } } @@ -487,9 +493,14 @@ pub struct SafeKeeper { // Cached metrics so we don't have to recompute labels on each update. metrics: SafeKeeperMetrics, - /// not-yet-flushed pairs of same named fields in s.* - pub commit_lsn: Lsn, - pub peer_horizon_lsn: Lsn, + /// Maximum commit_lsn between all nodes, can be ahead of local flush_lsn. + global_commit_lsn: Lsn, + /// LSN since the proposer safekeeper currently talking to appends WAL; + /// determines epoch switch point. + epoch_start_lsn: Lsn, + + pub inmem: SafekeeperMemState, // in memory part + pub s: SafeKeeperState, // persistent part pub control_store: CTRL, @@ -513,9 +524,13 @@ where } SafeKeeper { - metrics: SafeKeeperMetrics::new(state.tenant_id, ztli, state.commit_lsn), - commit_lsn: state.commit_lsn, - peer_horizon_lsn: state.peer_horizon_lsn, + metrics: SafeKeeperMetrics::new(state.tenant_id, ztli), + global_commit_lsn: state.commit_lsn, + epoch_start_lsn: Lsn(0), + inmem: SafekeeperMemState { + commit_lsn: state.commit_lsn, + peer_horizon_lsn: state.peer_horizon_lsn, + }, s: state, control_store, wal_store, @@ -602,9 +617,6 @@ where // pass wal_seg_size to read WAL and find flush_lsn self.wal_store.init_storage(&self.s)?; - // update tenant_id/timeline_id in metrics - self.metrics = SafeKeeperMetrics::new(msg.tenant_id, msg.ztli, self.commit_lsn); - info!( "processed greeting from proposer {:?}, sending term {:?}", msg.proposer_id, self.s.acceptor_state.term @@ -684,12 +696,49 @@ where Ok(None) } + /// Advance commit_lsn taking into account what we have locally + fn update_commit_lsn(&mut self) -> Result<()> { + let commit_lsn = min(self.global_commit_lsn, self.wal_store.flush_lsn()); + assert!(commit_lsn >= self.inmem.commit_lsn); + + self.inmem.commit_lsn = commit_lsn; + self.metrics.commit_lsn.set(self.inmem.commit_lsn.0 as f64); + + // If new commit_lsn reached epoch switch, force sync of control + // file: walproposer in sync mode is very interested when this + // happens. Note: this is for sync-safekeepers mode only, as + // otherwise commit_lsn might jump over epoch_start_lsn. + // Also note that commit_lsn can reach epoch_start_lsn earlier + // that we receive new epoch_start_lsn, and we still need to sync + // control file in this case. + if commit_lsn == self.epoch_start_lsn && self.s.commit_lsn != commit_lsn { + self.persist_control_file()?; + } + + // We got our first commit_lsn, which means we should sync + // everything to disk, to initialize the state. + if self.s.commit_lsn == Lsn(0) && commit_lsn > Lsn(0) { + self.wal_store.flush_wal()?; + self.persist_control_file()?; + } + + Ok(()) + } + + /// Persist in-memory state to the disk. + fn persist_control_file(&mut self) -> Result<()> { + self.s.commit_lsn = self.inmem.commit_lsn; + self.s.peer_horizon_lsn = self.inmem.peer_horizon_lsn; + + self.control_store.persist(&self.s) + } + /// Handle request to append WAL. #[allow(clippy::comparison_chain)] fn handle_append_request( &mut self, msg: &AppendRequest, - mut require_flush: bool, + require_flush: bool, ) -> Result> { if self.s.acceptor_state.term < msg.h.term { bail!("got AppendRequest before ProposerElected"); @@ -701,25 +750,22 @@ where return Ok(Some(AcceptorProposerMessage::AppendResponse(resp))); } - // After ProposerElected, which performs truncation, we should get only - // indeed append requests (but flush_lsn is advanced only on record - // boundary, so might be less). - assert!(self.wal_store.flush_lsn() <= msg.h.begin_lsn); + // Now we know that we are in the same term as the proposer, + // processing the message. + self.epoch_start_lsn = msg.h.epoch_start_lsn; + // TODO: don't update state without persisting to disk self.s.proposer_uuid = msg.h.proposer_uuid; - let mut sync_control_file = false; // do the job if !msg.wal_data.is_empty() { self.wal_store.write_wal(msg.h.begin_lsn, &msg.wal_data)?; - // If this was the first record we ever receieved, initialize + // If this was the first record we ever received, initialize // commit_lsn to help find_end_of_wal skip the hole in the // beginning. - if self.s.commit_lsn == Lsn(0) { - self.s.commit_lsn = msg.h.begin_lsn; - sync_control_file = true; - require_flush = true; + if self.global_commit_lsn == Lsn(0) { + self.global_commit_lsn = msg.h.begin_lsn; } } @@ -728,35 +774,22 @@ where self.wal_store.flush_wal()?; } - // Advance commit_lsn taking into account what we have locally. - // commit_lsn can be 0, being unknown to new walproposer while he hasn't - // collected majority of its epoch acks yet, ignore it in this case. + // Update global_commit_lsn, verifying that it cannot decrease. if msg.h.commit_lsn != Lsn(0) { - let commit_lsn = min(msg.h.commit_lsn, self.wal_store.flush_lsn()); - // If new commit_lsn reached epoch switch, force sync of control - // file: walproposer in sync mode is very interested when this - // happens. Note: this is for sync-safekeepers mode only, as - // otherwise commit_lsn might jump over epoch_start_lsn. - sync_control_file |= commit_lsn == msg.h.epoch_start_lsn; - self.commit_lsn = commit_lsn; - self.metrics - .commit_lsn - .set(u64::from(self.commit_lsn) as f64); + assert!(msg.h.commit_lsn >= self.global_commit_lsn); + self.global_commit_lsn = msg.h.commit_lsn; } - self.peer_horizon_lsn = msg.h.truncate_lsn; + self.inmem.peer_horizon_lsn = msg.h.truncate_lsn; + self.update_commit_lsn()?; + // Update truncate and commit LSN in control file. // To avoid negative impact on performance of extra fsync, do it only // when truncate_lsn delta exceeds WAL segment size. - sync_control_file |= - self.s.peer_horizon_lsn + (self.s.server.wal_seg_size as u64) < self.peer_horizon_lsn; - if sync_control_file { - self.s.commit_lsn = self.commit_lsn; - self.s.peer_horizon_lsn = self.peer_horizon_lsn; - } - - if sync_control_file { - self.control_store.persist(&self.s)?; + if self.s.peer_horizon_lsn + (self.s.server.wal_seg_size as u64) + < self.inmem.peer_horizon_lsn + { + self.persist_control_file()?; } trace!( @@ -780,6 +813,10 @@ where /// Flush WAL to disk. Return AppendResponse with latest LSNs. fn handle_flush(&mut self) -> Result> { self.wal_store.flush_wal()?; + + // commit_lsn can be updated because we have new flushed data locally. + self.update_commit_lsn()?; + Ok(Some(AcceptorProposerMessage::AppendResponse( self.append_response(), ))) diff --git a/walkeeper/src/timeline.rs b/walkeeper/src/timeline.rs index ea8308b95e..b53f2e086b 100644 --- a/walkeeper/src/timeline.rs +++ b/walkeeper/src/timeline.rs @@ -340,7 +340,7 @@ impl Timeline { let replica_state = shared_state.replicas[replica_id].unwrap(); let deactivate = shared_state.notified_commit_lsn == Lsn(0) || // no data at all yet (replica_state.last_received_lsn != Lsn::MAX && // Lsn::MAX means that we don't know the latest LSN yet. - replica_state.last_received_lsn >= shared_state.sk.commit_lsn); + replica_state.last_received_lsn >= shared_state.sk.inmem.commit_lsn); if deactivate { shared_state.deactivate(&self.zttid, callmemaybe_tx)?; return Ok(true); @@ -394,7 +394,7 @@ impl Timeline { rmsg = shared_state.sk.process_msg(msg)?; // locally available commit lsn. flush_lsn can be smaller than // commit_lsn if we are catching up safekeeper. - commit_lsn = shared_state.sk.commit_lsn; + commit_lsn = shared_state.sk.inmem.commit_lsn; // if this is AppendResponse, fill in proper hot standby feedback and disk consistent lsn if let Some(AcceptorProposerMessage::AppendResponse(ref mut resp)) = rmsg { From d88f8b4a7e0b8251db36b7ed1dad4888765e3b83 Mon Sep 17 00:00:00 2001 From: Alexey Kondratov Date: Mon, 28 Mar 2022 20:47:55 +0300 Subject: [PATCH 38/83] Fix storage deploy condition in ansible playbook --- .circleci/ansible/deploy.yaml | 1 - 1 file changed, 1 deletion(-) diff --git a/.circleci/ansible/deploy.yaml b/.circleci/ansible/deploy.yaml index 09aca8539e..3540f01fcb 100644 --- a/.circleci/ansible/deploy.yaml +++ b/.circleci/ansible/deploy.yaml @@ -64,7 +64,6 @@ - pageserver - name: update remote storage (s3) config - when: current_version > remote_version or force_deploy lineinfile: path: /storage/pageserver/data/pageserver.toml line: "{{ item }}" From 9a4f0930c02906bdce0806db6dceed44c48e0c66 Mon Sep 17 00:00:00 2001 From: Alexey Kondratov Date: Mon, 28 Mar 2022 22:10:15 +0300 Subject: [PATCH 39/83] Turn off S3 for pageserver on staging --- .circleci/ansible/deploy.yaml | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/.circleci/ansible/deploy.yaml b/.circleci/ansible/deploy.yaml index 3540f01fcb..b7ffd075a0 100644 --- a/.circleci/ansible/deploy.yaml +++ b/.circleci/ansible/deploy.yaml @@ -63,18 +63,21 @@ tags: - pageserver - - name: update remote storage (s3) config - lineinfile: - path: /storage/pageserver/data/pageserver.toml - line: "{{ item }}" - loop: - - "[remote_storage]" - - "bucket_name = '{{ bucket_name }}'" - - "bucket_region = '{{ bucket_region }}'" - - "prefix_in_bucket = '{{ inventory_hostname }}'" - become: true - tags: - - pageserver + # It seems that currently S3 integration does not play well + # even with fresh pageserver without a burden of old data. + # TODO: turn this back on once the issue is solved. + # - name: update remote storage (s3) config + # lineinfile: + # path: /storage/pageserver/data/pageserver.toml + # line: "{{ item }}" + # loop: + # - "[remote_storage]" + # - "bucket_name = '{{ bucket_name }}'" + # - "bucket_region = '{{ bucket_region }}'" + # - "prefix_in_bucket = '{{ inventory_hostname }}'" + # become: true + # tags: + # - pageserver - name: upload systemd service definition ansible.builtin.template: From 1aa57fc262bebb52b78dfa4054bdf9e8bd9cb48c Mon Sep 17 00:00:00 2001 From: Dhammika Pathirana Date: Mon, 28 Mar 2022 12:07:23 -0700 Subject: [PATCH 40/83] Fix tone down compact log chatter Signed-off-by: Dhammika Pathirana --- pageserver/src/layered_repository.rs | 3 +++ 1 file changed, 3 insertions(+) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 837298a10e..a0f1f2d830 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -1628,6 +1628,9 @@ impl LayeredTimeline { }; let num_deltas = layers.count_deltas(&img_range, &(img_lsn..lsn))?; + if num_deltas == 0 { + continue; + } info!( "range {}-{}, has {} deltas on this timeline", From 0e44887929daa9851fb0c6239d1011c41cde04b8 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Mon, 28 Mar 2022 22:33:05 +0300 Subject: [PATCH 41/83] Show more S3 logs and less verbove WAL logs --- pageserver/src/config.rs | 2 +- pageserver/src/layered_repository.rs | 2 +- pageserver/src/remote_storage/storage_sync.rs | 47 ++++++++++++------- pageserver/src/walreceiver.rs | 2 +- 4 files changed, 33 insertions(+), 20 deletions(-) diff --git a/pageserver/src/config.rs b/pageserver/src/config.rs index 0fdfb4ceed..9f7cd34a7a 100644 --- a/pageserver/src/config.rs +++ b/pageserver/src/config.rs @@ -41,7 +41,7 @@ pub mod defaults { pub const DEFAULT_WAL_REDO_TIMEOUT: &str = "60 s"; pub const DEFAULT_SUPERUSER: &str = "zenith_admin"; - pub const DEFAULT_REMOTE_STORAGE_MAX_CONCURRENT_SYNC: usize = 100; + pub const DEFAULT_REMOTE_STORAGE_MAX_CONCURRENT_SYNC: usize = 10; pub const DEFAULT_REMOTE_STORAGE_MAX_SYNC_ERRORS: u32 = 10; pub const DEFAULT_PAGE_CACHE_SIZE: usize = 8192; diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index a0f1f2d830..56d14fd4e9 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -1594,7 +1594,7 @@ impl LayeredTimeline { self.compact_level0(target_file_size)?; timer.stop_and_record(); } else { - info!("Could not compact because no partitioning specified yet"); + debug!("Could not compact because no partitioning specified yet"); } // Call unload() on all frozen layers, to release memory. diff --git a/pageserver/src/remote_storage/storage_sync.rs b/pageserver/src/remote_storage/storage_sync.rs index ddd47ea981..cd6c40b46f 100644 --- a/pageserver/src/remote_storage/storage_sync.rs +++ b/pageserver/src/remote_storage/storage_sync.rs @@ -443,30 +443,38 @@ fn storage_sync_loop< max_sync_errors: NonZeroU32, ) { let remote_assets = Arc::new((storage, index.clone())); + info!("Starting remote storage sync loop"); loop { let index = index.clone(); let loop_step = runtime.block_on(async { tokio::select! { - new_timeline_states = loop_step( + step = loop_step( conf, &mut receiver, Arc::clone(&remote_assets), max_concurrent_sync, max_sync_errors, ) - .instrument(debug_span!("storage_sync_loop_step")) => LoopStep::SyncStatusUpdates(new_timeline_states), + .instrument(debug_span!("storage_sync_loop_step")) => step, _ = thread_mgr::shutdown_watcher() => LoopStep::Shutdown, } }); match loop_step { LoopStep::SyncStatusUpdates(new_timeline_states) => { - // Batch timeline download registration to ensure that the external registration code won't block any running tasks before. - apply_timeline_sync_status_updates(conf, index, new_timeline_states); - debug!("Sync loop step completed"); + if new_timeline_states.is_empty() { + debug!("Sync loop step completed, no new timeline states"); + } else { + info!( + "Sync loop step completed, {} new timeline state update(s)", + new_timeline_states.len() + ); + // Batch timeline download registration to ensure that the external registration code won't block any running tasks before. + apply_timeline_sync_status_updates(conf, index, new_timeline_states); + } } LoopStep::Shutdown => { - debug!("Shutdown requested, stopping"); + info!("Shutdown requested, stopping"); break; } } @@ -482,7 +490,7 @@ async fn loop_step< remote_assets: Arc<(S, RemoteIndex)>, max_concurrent_sync: NonZeroUsize, max_sync_errors: NonZeroU32, -) -> HashMap> { +) -> LoopStep { let max_concurrent_sync = max_concurrent_sync.get(); let mut next_tasks = Vec::new(); @@ -490,8 +498,7 @@ async fn loop_step< if let Some(first_task) = sync_queue::next_task(receiver).await { next_tasks.push(first_task); } else { - debug!("Shutdown requested, stopping"); - return HashMap::new(); + return LoopStep::Shutdown; }; next_tasks.extend( sync_queue::next_task_batch(receiver, max_concurrent_sync - 1) @@ -500,12 +507,17 @@ async fn loop_step< ); let remaining_queue_length = sync_queue::len(); - debug!( - "Processing {} tasks in batch, more tasks left to process: {}", - next_tasks.len(), - remaining_queue_length - ); REMAINING_SYNC_ITEMS.set(remaining_queue_length as i64); + if remaining_queue_length > 0 || !next_tasks.is_empty() { + info!( + "Processing {} tasks in batch, more tasks left to process: {}", + next_tasks.len(), + remaining_queue_length + ); + } else { + debug!("No tasks to process"); + return LoopStep::SyncStatusUpdates(HashMap::new()); + } let mut task_batch = next_tasks .into_iter() @@ -515,8 +527,9 @@ async fn loop_step< let sync_name = task.kind.sync_name(); let extra_step = match tokio::spawn( - process_task(conf, Arc::clone(&remote_assets), task, max_sync_errors) - .instrument(debug_span!("", sync_id = %sync_id, attempt, sync_name)), + process_task(conf, Arc::clone(&remote_assets), task, max_sync_errors).instrument( + debug_span!("process_sync_task", sync_id = %sync_id, attempt, sync_name), + ), ) .await { @@ -551,7 +564,7 @@ async fn loop_step< } } - new_timeline_states + LoopStep::SyncStatusUpdates(new_timeline_states) } async fn process_task< diff --git a/pageserver/src/walreceiver.rs b/pageserver/src/walreceiver.rs index e382475627..6de0b87478 100644 --- a/pageserver/src/walreceiver.rs +++ b/pageserver/src/walreceiver.rs @@ -70,7 +70,7 @@ pub fn launch_wal_receiver( match receivers.get_mut(&(tenantid, timelineid)) { Some(receiver) => { - info!("wal receiver already running, updating connection string"); + debug!("wal receiver already running, updating connection string"); receiver.wal_producer_connstr = wal_producer_connstr.into(); } None => { From be6a6958e26b2eae54fe00fd282772222d44b728 Mon Sep 17 00:00:00 2001 From: Anton Shyrabokau <97127717+antons-antons@users.noreply.github.com> Date: Mon, 28 Mar 2022 18:19:20 -0700 Subject: [PATCH 42/83] CI: rebuild postgres when Makefile changes (#1429) --- .circleci/config.yml | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/.circleci/config.yml b/.circleci/config.yml index 8faa69d64e..4a03cbf3b5 100644 --- a/.circleci/config.yml +++ b/.circleci/config.yml @@ -34,10 +34,13 @@ jobs: - checkout # Grab the postgres git revision to build a cache key. + # Append makefile as it could change the way postgres is built. # Note this works even though the submodule hasn't been checkout out yet. - run: name: Get postgres cache key - command: git rev-parse HEAD:vendor/postgres > /tmp/cache-key-postgres + command: | + git rev-parse HEAD:vendor/postgres > /tmp/cache-key-postgres + cat Makefile >> /tmp/cache-key-postgres - restore_cache: name: Restore postgres cache @@ -78,11 +81,14 @@ jobs: - checkout # Grab the postgres git revision to build a cache key. + # Append makefile as it could change the way postgres is built. # Note this works even though the submodule hasn't been checkout out yet. - run: name: Get postgres cache key command: | git rev-parse HEAD:vendor/postgres > /tmp/cache-key-postgres + cat Makefile >> /tmp/cache-key-postgres + - restore_cache: name: Restore postgres cache From fd78110c2bd22fa2fdb4a3191df542b697858528 Mon Sep 17 00:00:00 2001 From: Arthur Petukhovsky Date: Tue, 29 Mar 2022 09:57:00 +0300 Subject: [PATCH 43/83] Add default statement_timeout for tests (#1423) --- test_runner/fixtures/zenith_fixtures.py | 36 +++++++++++++++---------- 1 file changed, 22 insertions(+), 14 deletions(-) diff --git a/test_runner/fixtures/zenith_fixtures.py b/test_runner/fixtures/zenith_fixtures.py index 08ac09ee4c..2da021a49c 100644 --- a/test_runner/fixtures/zenith_fixtures.py +++ b/test_runner/fixtures/zenith_fixtures.py @@ -257,7 +257,8 @@ class PgProtocol: dbname: Optional[str] = None, schema: Optional[str] = None, username: Optional[str] = None, - password: Optional[str] = None) -> str: + password: Optional[str] = None, + statement_timeout_ms: Optional[int] = None) -> str: """ Build a libpq connection string for the Postgres instance. """ @@ -277,16 +278,23 @@ class PgProtocol: if schema: res = f"{res} options='-c search_path={schema}'" + if statement_timeout_ms: + res = f"{res} options='-c statement_timeout={statement_timeout_ms}'" + return res # autocommit=True here by default because that's what we need most of the time - def connect(self, - *, - autocommit=True, - dbname: Optional[str] = None, - schema: Optional[str] = None, - username: Optional[str] = None, - password: Optional[str] = None) -> PgConnection: + def connect( + self, + *, + autocommit=True, + dbname: Optional[str] = None, + schema: Optional[str] = None, + username: Optional[str] = None, + password: Optional[str] = None, + # individual statement timeout in seconds, 2 minutes should be enough for our tests + statement_timeout: Optional[int] = 120 + ) -> PgConnection: """ Connect to the node. Returns psycopg2's connection object. @@ -294,12 +302,12 @@ class PgProtocol: """ conn = psycopg2.connect( - self.connstr( - dbname=dbname, - schema=schema, - username=username, - password=password, - )) + self.connstr(dbname=dbname, + schema=schema, + username=username, + password=password, + statement_timeout_ms=statement_timeout * + 1000 if statement_timeout else None)) # WARNING: this setting affects *all* tests! conn.autocommit = autocommit return conn From eee0f51e0c3ea2d52269741124b68b8dac0e051c Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Mon, 28 Mar 2022 11:39:15 +0300 Subject: [PATCH 44/83] use cargo-hakari to manage workspace_hack crate workspace_hack is needed to avoid recompilation when different crates inside the workspace depend on the same packages but with different features being enabled. Problem occurs when you build crates separately one by one. So this is irrelevant to our CI setup because there we build all binaries at once, but it may be relevant for local development. this also changes cargo's resolver version to 2 --- .config/hakari.toml | 24 ++++++++++++++++ Cargo.lock | 15 ++++++++++ Cargo.toml | 1 + compute_tools/Cargo.toml | 1 + control_plane/Cargo.toml | 2 +- docs/sourcetree.md | 2 ++ pageserver/Cargo.toml | 2 +- postgres_ffi/Cargo.toml | 2 +- proxy/Cargo.toml | 1 + walkeeper/Cargo.toml | 2 +- workspace_hack/Cargo.toml | 60 ++++++++++++++++++++++++++++----------- workspace_hack/src/lib.rs | 24 +--------------- zenith/Cargo.toml | 2 +- zenith_metrics/Cargo.toml | 1 + zenith_utils/Cargo.toml | 2 +- 15 files changed, 96 insertions(+), 45 deletions(-) create mode 100644 .config/hakari.toml diff --git a/.config/hakari.toml b/.config/hakari.toml new file mode 100644 index 0000000000..7bccc6c4a3 --- /dev/null +++ b/.config/hakari.toml @@ -0,0 +1,24 @@ +# This file contains settings for `cargo hakari`. +# See https://docs.rs/cargo-hakari/latest/cargo_hakari/config for a full list of options. + +hakari-package = "workspace_hack" + +# Format for `workspace-hack = ...` lines in other Cargo.tomls. Requires cargo-hakari 0.9.8 or above. +dep-format-version = "2" + +# Setting workspace.resolver = "2" in the root Cargo.toml is HIGHLY recommended. +# Hakari works much better with the new feature resolver. +# For more about the new feature resolver, see: +# https://blog.rust-lang.org/2021/03/25/Rust-1.51.0.html#cargos-new-feature-resolver +resolver = "2" + +# Add triples corresponding to platforms commonly used by developers here. +# https://doc.rust-lang.org/rustc/platform-support.html +platforms = [ + # "x86_64-unknown-linux-gnu", + # "x86_64-apple-darwin", + # "x86_64-pc-windows-msvc", +] + +# Write out exact versions rather than a semver range. (Defaults to false.) +# exact-versions = true diff --git a/Cargo.lock b/Cargo.lock index 290d715f2c..40f4358d98 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -407,6 +407,7 @@ dependencies = [ "serde_json", "tar", "tokio", + "workspace_hack", ] [[package]] @@ -1803,6 +1804,7 @@ dependencies = [ "tokio-postgres 0.7.1 (git+https://github.com/zenithdb/rust-postgres.git?rev=2949d98df52587d562986aad155dd4e889e408b7)", "tokio-postgres-rustls", "tokio-rustls 0.22.0", + "workspace_hack", "zenith_metrics", "zenith_utils", ] @@ -3041,7 +3043,14 @@ dependencies = [ name = "workspace_hack" version = "0.1.0" dependencies = [ + "anyhow", + "bytes", + "cc", + "clap 2.34.0", + "either", + "hashbrown 0.11.2", "libc", + "log", "memchr", "num-integer", "num-traits", @@ -3049,8 +3058,13 @@ dependencies = [ "quote", "regex", "regex-syntax", + "reqwest", + "scopeguard", "serde", "syn", + "tokio", + "tracing", + "tracing-core", ] [[package]] @@ -3101,6 +3115,7 @@ dependencies = [ "libc", "once_cell", "prometheus", + "workspace_hack", ] [[package]] diff --git a/Cargo.toml b/Cargo.toml index b20e64a06f..f3ac36dcb2 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -11,6 +11,7 @@ members = [ "zenith_metrics", "zenith_utils", ] +resolver = "2" [profile.release] # This is useful for profiling and, to some extent, debug. diff --git a/compute_tools/Cargo.toml b/compute_tools/Cargo.toml index 3adf762dcb..4ecf7f6499 100644 --- a/compute_tools/Cargo.toml +++ b/compute_tools/Cargo.toml @@ -17,3 +17,4 @@ serde = { version = "1.0", features = ["derive"] } serde_json = "1" tar = "0.4" tokio = { version = "1", features = ["macros", "rt", "rt-multi-thread"] } +workspace_hack = { version = "0.1", path = "../workspace_hack" } diff --git a/control_plane/Cargo.toml b/control_plane/Cargo.toml index b52c7ad5a9..e118ea4793 100644 --- a/control_plane/Cargo.toml +++ b/control_plane/Cargo.toml @@ -20,4 +20,4 @@ reqwest = { version = "0.11", default-features = false, features = ["blocking", pageserver = { path = "../pageserver" } walkeeper = { path = "../walkeeper" } zenith_utils = { path = "../zenith_utils" } -workspace_hack = { path = "../workspace_hack" } +workspace_hack = { version = "0.1", path = "../workspace_hack" } diff --git a/docs/sourcetree.md b/docs/sourcetree.md index 8d35d35f2f..89b07de8d2 100644 --- a/docs/sourcetree.md +++ b/docs/sourcetree.md @@ -67,6 +67,8 @@ For more detailed info, see `/walkeeper/README` `/workspace_hack`: The workspace_hack crate exists only to pin down some dependencies. +We use [cargo-hakari](https://crates.io/crates/cargo-hakari) for automation. + `/zenith` Main entry point for the 'zenith' CLI utility. diff --git a/pageserver/Cargo.toml b/pageserver/Cargo.toml index de22d0dd77..14eae31da8 100644 --- a/pageserver/Cargo.toml +++ b/pageserver/Cargo.toml @@ -51,7 +51,7 @@ async-compression = {version = "0.3", features = ["zstd", "tokio"]} postgres_ffi = { path = "../postgres_ffi" } zenith_metrics = { path = "../zenith_metrics" } zenith_utils = { path = "../zenith_utils" } -workspace_hack = { path = "../workspace_hack" } +workspace_hack = { version = "0.1", path = "../workspace_hack" } [dev-dependencies] hex-literal = "0.3" diff --git a/postgres_ffi/Cargo.toml b/postgres_ffi/Cargo.toml index 17f1ecd666..e8d471cb12 100644 --- a/postgres_ffi/Cargo.toml +++ b/postgres_ffi/Cargo.toml @@ -17,8 +17,8 @@ log = "0.4.14" memoffset = "0.6.2" thiserror = "1.0" serde = { version = "1.0", features = ["derive"] } -workspace_hack = { path = "../workspace_hack" } zenith_utils = { path = "../zenith_utils" } +workspace_hack = { version = "0.1", path = "../workspace_hack" } [build-dependencies] bindgen = "0.59.1" diff --git a/proxy/Cargo.toml b/proxy/Cargo.toml index dda018a1d8..72c394dad4 100644 --- a/proxy/Cargo.toml +++ b/proxy/Cargo.toml @@ -29,6 +29,7 @@ tokio-rustls = "0.22.0" zenith_utils = { path = "../zenith_utils" } zenith_metrics = { path = "../zenith_metrics" } +workspace_hack = { version = "0.1", path = "../workspace_hack" } [dev-dependencies] tokio-postgres-rustls = "0.8.0" diff --git a/walkeeper/Cargo.toml b/walkeeper/Cargo.toml index 193fc4acf6..f59c24816d 100644 --- a/walkeeper/Cargo.toml +++ b/walkeeper/Cargo.toml @@ -29,9 +29,9 @@ const_format = "0.2.21" tokio-postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } postgres_ffi = { path = "../postgres_ffi" } -workspace_hack = { path = "../workspace_hack" } zenith_metrics = { path = "../zenith_metrics" } zenith_utils = { path = "../zenith_utils" } +workspace_hack = { version = "0.1", path = "../workspace_hack" } [dev-dependencies] tempfile = "3.2" diff --git a/workspace_hack/Cargo.toml b/workspace_hack/Cargo.toml index 48d81bbc07..6e6a0e09d7 100644 --- a/workspace_hack/Cargo.toml +++ b/workspace_hack/Cargo.toml @@ -1,22 +1,50 @@ +# This file is generated by `cargo hakari`. +# To regenerate, run: +# cargo hakari generate + [package] name = "workspace_hack" version = "0.1.0" -edition = "2021" +description = "workspace-hack package, managed by hakari" +# You can choose to publish this crate: see https://docs.rs/cargo-hakari/latest/cargo_hakari/publishing. +publish = false -[target.'cfg(all())'.dependencies] -libc = { version = "0.2", features = ["default", "extra_traits", "std"] } -memchr = { version = "2", features = ["default", "std", "use_std"] } +# The parts of the file between the BEGIN HAKARI SECTION and END HAKARI SECTION comments +# are managed by hakari. + +### BEGIN HAKARI SECTION +[dependencies] +anyhow = { version = "1", features = ["backtrace", "std"] } +bytes = { version = "1", features = ["serde", "std"] } +clap = { version = "2", features = ["ansi_term", "atty", "color", "strsim", "suggestions", "vec_map"] } +either = { version = "1", features = ["use_std"] } +hashbrown = { version = "0.11", features = ["ahash", "inline-more", "raw"] } +libc = { version = "0.2", features = ["extra_traits", "std"] } +log = { version = "0.4", default-features = false, features = ["serde", "std"] } +memchr = { version = "2", features = ["std", "use_std"] } num-integer = { version = "0.1", default-features = false, features = ["std"] } -num-traits = { version = "0.2", default-features = false, features = ["std"] } -regex = { version = "1", features = ["aho-corasick", "default", "memchr", "perf", "perf-cache", "perf-dfa", "perf-inline", "perf-literal", "std", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"] } -regex-syntax = { version = "0.6", features = ["default", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"] } -serde = { version = "1", features = ["default", "derive", "serde_derive", "std"] } +num-traits = { version = "0.2", features = ["std"] } +regex = { version = "1", features = ["aho-corasick", "memchr", "perf", "perf-cache", "perf-dfa", "perf-inline", "perf-literal", "std", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"] } +regex-syntax = { version = "0.6", features = ["unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"] } +reqwest = { version = "0.11", default-features = false, features = ["__rustls", "__tls", "blocking", "hyper-rustls", "json", "rustls", "rustls-pemfile", "rustls-tls", "rustls-tls-webpki-roots", "serde_json", "stream", "tokio-rustls", "tokio-util", "webpki-roots"] } +scopeguard = { version = "1", features = ["use_std"] } +serde = { version = "1", features = ["alloc", "derive", "serde_derive", "std"] } +tokio = { version = "1", features = ["bytes", "fs", "io-util", "libc", "macros", "memchr", "mio", "net", "num_cpus", "once_cell", "process", "rt", "rt-multi-thread", "signal-hook-registry", "sync", "time", "tokio-macros"] } +tracing = { version = "0.1", features = ["attributes", "std", "tracing-attributes"] } +tracing-core = { version = "0.1", features = ["lazy_static", "std"] } -[target.'cfg(all())'.build-dependencies] -libc = { version = "0.2", features = ["default", "extra_traits", "std"] } -memchr = { version = "2", features = ["default", "std", "use_std"] } -proc-macro2 = { version = "1", features = ["default", "proc-macro"] } -quote = { version = "1", features = ["default", "proc-macro"] } -regex = { version = "1", features = ["aho-corasick", "default", "memchr", "perf", "perf-cache", "perf-dfa", "perf-inline", "perf-literal", "std", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"] } -regex-syntax = { version = "0.6", features = ["default", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"] } -syn = { version = "1", features = ["clone-impls", "default", "derive", "full", "parsing", "printing", "proc-macro", "quote", "visit", "visit-mut"] } +[build-dependencies] +cc = { version = "1", default-features = false, features = ["jobserver", "parallel"] } +clap = { version = "2", features = ["ansi_term", "atty", "color", "strsim", "suggestions", "vec_map"] } +either = { version = "1", features = ["use_std"] } +libc = { version = "0.2", features = ["extra_traits", "std"] } +log = { version = "0.4", default-features = false, features = ["serde", "std"] } +memchr = { version = "2", features = ["std", "use_std"] } +proc-macro2 = { version = "1", features = ["proc-macro"] } +quote = { version = "1", features = ["proc-macro"] } +regex = { version = "1", features = ["aho-corasick", "memchr", "perf", "perf-cache", "perf-dfa", "perf-inline", "perf-literal", "std", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"] } +regex-syntax = { version = "0.6", features = ["unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment"] } +serde = { version = "1", features = ["alloc", "derive", "serde_derive", "std"] } +syn = { version = "1", features = ["clone-impls", "derive", "extra-traits", "full", "parsing", "printing", "proc-macro", "quote", "visit", "visit-mut"] } + +### END HAKARI SECTION diff --git a/workspace_hack/src/lib.rs b/workspace_hack/src/lib.rs index ceba3d145d..22489f632b 100644 --- a/workspace_hack/src/lib.rs +++ b/workspace_hack/src/lib.rs @@ -1,23 +1 @@ -//! This crate contains no code. -//! -//! The workspace_hack crate exists only to pin down some dependencies, -//! so that those dependencies always build with the same features, -//! under a few different cases that can be problematic: -//! - Running `cargo check` or `cargo build` from a crate sub-directory -//! instead of the workspace root. -//! - Running `cargo install`, which can only be done per-crate -//! -//! The dependency lists in Cargo.toml were automatically generated by -//! a tool called -//! [Hakari](https://github.com/facebookincubator/cargo-guppy/tree/main/tools/hakari). -//! -//! Hakari doesn't have a CLI yet; in the meantime the example code in -//! their `README` file is enough to regenerate the dependencies. -//! Hakari's output was pasted into Cargo.toml, except for the -//! following manual edits: -//! - `winapi` dependency was removed. This is probably just due to the -//! fact that Hakari's target analysis is incomplete. -//! -//! There isn't any penalty to this data falling out of date; it just -//! means that under the conditions above Cargo will rebuild more -//! packages than strictly necessary. +// This is a stub lib.rs. diff --git a/zenith/Cargo.toml b/zenith/Cargo.toml index 8adbda0723..74aeffb51c 100644 --- a/zenith/Cargo.toml +++ b/zenith/Cargo.toml @@ -15,4 +15,4 @@ control_plane = { path = "../control_plane" } walkeeper = { path = "../walkeeper" } postgres_ffi = { path = "../postgres_ffi" } zenith_utils = { path = "../zenith_utils" } -workspace_hack = { path = "../workspace_hack" } +workspace_hack = { version = "0.1", path = "../workspace_hack" } diff --git a/zenith_metrics/Cargo.toml b/zenith_metrics/Cargo.toml index 0c921ede0b..906c5a1d64 100644 --- a/zenith_metrics/Cargo.toml +++ b/zenith_metrics/Cargo.toml @@ -8,3 +8,4 @@ prometheus = {version = "0.13", default_features=false} # removes protobuf depen libc = "0.2" lazy_static = "1.4" once_cell = "1.8.0" +workspace_hack = { version = "0.1", path = "../workspace_hack" } diff --git a/zenith_utils/Cargo.toml b/zenith_utils/Cargo.toml index 8e7f5f233c..e8ad0e627f 100644 --- a/zenith_utils/Cargo.toml +++ b/zenith_utils/Cargo.toml @@ -30,7 +30,7 @@ git-version = "0.3.5" serde_with = "1.12.0" zenith_metrics = { path = "../zenith_metrics" } -workspace_hack = { path = "../workspace_hack" } +workspace_hack = { version = "0.1", path = "../workspace_hack" } [dev-dependencies] byteorder = "1.4.3" From 9594362f74c2ea66a495da8d50c3cb25de67d62c Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Mon, 28 Mar 2022 17:34:13 +0300 Subject: [PATCH 45/83] change python cache version to 2 (fixes python cache in circle CI) --- .circleci/config.yml | 8 ++++---- scripts/pysync | 8 +++++++- 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/.circleci/config.yml b/.circleci/config.yml index 4a03cbf3b5..e96964558b 100644 --- a/.circleci/config.yml +++ b/.circleci/config.yml @@ -228,12 +228,12 @@ jobs: - checkout - restore_cache: keys: - - v1-python-deps-{{ checksum "poetry.lock" }} + - v2-python-deps-{{ checksum "poetry.lock" }} - run: name: Install deps command: ./scripts/pysync - save_cache: - key: v1-python-deps-{{ checksum "poetry.lock" }} + key: v2-python-deps-{{ checksum "poetry.lock" }} paths: - /home/circleci/.cache/pypoetry/virtualenvs - run: @@ -287,12 +287,12 @@ jobs: - run: git submodule update --init --depth 1 - restore_cache: keys: - - v1-python-deps-{{ checksum "poetry.lock" }} + - v2-python-deps-{{ checksum "poetry.lock" }} - run: name: Install deps command: ./scripts/pysync - save_cache: - key: v1-python-deps-{{ checksum "poetry.lock" }} + key: v2-python-deps-{{ checksum "poetry.lock" }} paths: - /home/circleci/.cache/pypoetry/virtualenvs - run: diff --git a/scripts/pysync b/scripts/pysync index e548973dea..12fa08beca 100755 --- a/scripts/pysync +++ b/scripts/pysync @@ -4,4 +4,10 @@ # It is intended to be a primary endpoint for all the people who want to # just setup test environment without going into details of python package management -poetry install --no-root # this installs dev dependencies by default +poetry config --list + +if [ -z "${CI}" ]; then + poetry install --no-root --no-interaction --ansi +else + poetry install --no-root +fi From ec3bc741653d8c14f99a27c58ff74f4046ba7969 Mon Sep 17 00:00:00 2001 From: Arseny Sher Date: Thu, 17 Mar 2022 15:14:16 +0300 Subject: [PATCH 46/83] Add safekeeper information exchange through etcd. Safekeers now publish to and pull from etcd per-timeline data. Immediate goal is WAL truncation, for which every safekeeper must know remote_consistent_lsn; the next would be callmemaybe replacement. Adds corresponding '--broker' argument to safekeeper and ability to run etcd in tests. Adds test checking remote_consistent_lsn is indeed communicated. --- Cargo.lock | 252 +++++++++++++++++- control_plane/src/local_env.rs | 4 + control_plane/src/safekeeper.rs | 6 + test_runner/README.md | 2 + test_runner/batch_others/test_wal_acceptor.py | 46 +++- test_runner/fixtures/utils.py | 6 + test_runner/fixtures/zenith_fixtures.py | 75 +++++- walkeeper/Cargo.toml | 3 + walkeeper/src/bin/safekeeper.rs | 27 +- walkeeper/src/broker.rs | 211 +++++++++++++++ walkeeper/src/handler.rs | 9 +- walkeeper/src/http/routes.rs | 17 +- walkeeper/src/json_ctrl.rs | 6 +- walkeeper/src/lib.rs | 4 + walkeeper/src/safekeeper.rs | 20 +- walkeeper/src/send_wal.rs | 2 +- walkeeper/src/timeline.rs | 76 +++++- 17 files changed, 726 insertions(+), 40 deletions(-) create mode 100644 walkeeper/src/broker.rs diff --git a/Cargo.lock b/Cargo.lock index 40f4358d98..c770f576c9 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -75,6 +75,27 @@ dependencies = [ "zstd-safe", ] +[[package]] +name = "async-stream" +version = "0.3.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "171374e7e3b2504e0e5236e3b59260560f9fe94bfe9ac39ba5e4e929c5590625" +dependencies = [ + "async-stream-impl", + "futures-core", +] + +[[package]] +name = "async-stream-impl" +version = "0.3.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "648ed8c8d2ce5409ccd57453d9d1b214b342a0d69376a6feda1fd6cae3299308" +dependencies = [ + "proc-macro2", + "quote", + "syn", +] + [[package]] name = "async-trait" version = "0.1.52" @@ -703,6 +724,21 @@ dependencies = [ "termcolor", ] +[[package]] +name = "etcd-client" +version = "0.8.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "585de5039d1ecce74773db49ba4e8107e42be7c2cd0b1a9e7fce27181db7b118" +dependencies = [ + "http", + "prost", + "tokio", + "tokio-stream", + "tonic", + "tonic-build", + "tower-service", +] + [[package]] name = "fail" version = "0.5.0" @@ -741,6 +777,12 @@ dependencies = [ "winapi", ] +[[package]] +name = "fixedbitset" +version = "0.4.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "279fb028e20b3c4c320317955b77c5e0c9701f05a1d309905d6fc702cdc5053e" + [[package]] name = "fnv" version = "1.0.7" @@ -926,7 +968,7 @@ dependencies = [ "indexmap", "slab", "tokio", - "tokio-util", + "tokio-util 0.6.9", "tracing", ] @@ -954,6 +996,15 @@ dependencies = [ "ahash 0.7.6", ] +[[package]] +name = "heck" +version = "0.3.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "6d621efb26863f0e9924c6ac577e8275e5e6b77455db64ffa6c65c904e9e132c" +dependencies = [ + "unicode-segmentation", +] + [[package]] name = "hermit-abi" version = "0.1.19" @@ -1075,6 +1126,18 @@ dependencies = [ "tokio-rustls 0.23.2", ] +[[package]] +name = "hyper-timeout" +version = "0.4.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "bbb958482e8c7be4bc3cf272a766a2b0bf1a6755e7a6ae777f017a31d11b13b1" +dependencies = [ + "hyper", + "pin-project-lite", + "tokio", + "tokio-io-timeout", +] + [[package]] name = "ident_case" version = "1.0.1" @@ -1308,9 +1371,9 @@ dependencies = [ [[package]] name = "mio" -version = "0.7.14" +version = "0.8.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "8067b404fe97c70829f082dec8bcf4f71225d7eaea1d8645349cb76fa06205cc" +checksum = "ba272f85fa0b41fc91872be579b3bbe0f56b792aa361a380eb669469f68dafb2" dependencies = [ "libc", "log", @@ -1328,6 +1391,12 @@ dependencies = [ "winapi", ] +[[package]] +name = "multimap" +version = "0.8.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "e5ce46fe64a9d73be07dcbe690a38ce1b293be448fd8ce1e6c1b8062c9f72c6a" + [[package]] name = "nix" version = "0.23.1" @@ -1557,6 +1626,16 @@ version = "2.1.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e" +[[package]] +name = "petgraph" +version = "0.6.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "4a13a2fa9d0b63e5f22328828741e523766fff0ee9e779316902290dff3f824f" +dependencies = [ + "fixedbitset", + "indexmap", +] + [[package]] name = "phf" version = "0.8.0" @@ -1776,6 +1855,59 @@ dependencies = [ "thiserror", ] +[[package]] +name = "prost" +version = "0.9.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "444879275cb4fd84958b1a1d5420d15e6fcf7c235fe47f053c9c2a80aceb6001" +dependencies = [ + "bytes", + "prost-derive", +] + +[[package]] +name = "prost-build" +version = "0.9.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "62941722fb675d463659e49c4f3fe1fe792ff24fe5bbaa9c08cd3b98a1c354f5" +dependencies = [ + "bytes", + "heck", + "itertools", + "lazy_static", + "log", + "multimap", + "petgraph", + "prost", + "prost-types", + "regex", + "tempfile", + "which", +] + +[[package]] +name = "prost-derive" +version = "0.9.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f9cc1a3263e07e0bf68e96268f37665207b49560d98739662cdfaae215c720fe" +dependencies = [ + "anyhow", + "itertools", + "proc-macro2", + "quote", + "syn", +] + +[[package]] +name = "prost-types" +version = "0.9.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "534b7a0e836e3c482d2693070f982e39e7611da9695d4d1f5a4b186b51faef0a" +dependencies = [ + "bytes", + "prost", +] + [[package]] name = "proxy" version = "0.1.0" @@ -1979,7 +2111,7 @@ dependencies = [ "serde_urlencoded", "tokio", "tokio-rustls 0.23.2", - "tokio-util", + "tokio-util 0.6.9", "url", "wasm-bindgen", "wasm-bindgen-futures", @@ -2508,9 +2640,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c" [[package]] name = "tokio" -version = "1.16.1" +version = "1.17.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "0c27a64b625de6d309e8c57716ba93021dccf1b3b5c97edd6d3dd2d2135afc0a" +checksum = "2af73ac49756f3f7c01172e34a23e5d0216f6c32333757c2c61feb2bbff5a5ee" dependencies = [ "bytes", "libc", @@ -2520,10 +2652,21 @@ dependencies = [ "once_cell", "pin-project-lite", "signal-hook-registry", + "socket2", "tokio-macros", "winapi", ] +[[package]] +name = "tokio-io-timeout" +version = "1.2.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "30b74022ada614a1b4834de765f9bb43877f910cc8ce4be40e89042c9223a8bf" +dependencies = [ + "pin-project-lite", + "tokio", +] + [[package]] name = "tokio-macros" version = "1.7.0" @@ -2554,7 +2697,7 @@ dependencies = [ "postgres-types 0.2.1 (git+https://github.com/zenithdb/rust-postgres.git?rev=2949d98df52587d562986aad155dd4e889e408b7)", "socket2", "tokio", - "tokio-util", + "tokio-util 0.6.9", ] [[package]] @@ -2576,7 +2719,7 @@ dependencies = [ "postgres-types 0.2.1 (git+https://github.com/zenithdb/rust-postgres.git?rev=9eb0dbfbeb6a6c1b79099b9f7ae4a8c021877858)", "socket2", "tokio", - "tokio-util", + "tokio-util 0.6.9", ] [[package]] @@ -2641,6 +2784,20 @@ dependencies = [ "tokio", ] +[[package]] +name = "tokio-util" +version = "0.7.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "64910e1b9c1901aaf5375561e35b9c057d95ff41a44ede043a03e09279eabaf1" +dependencies = [ + "bytes", + "futures-core", + "futures-sink", + "log", + "pin-project-lite", + "tokio", +] + [[package]] name = "toml" version = "0.5.8" @@ -2663,6 +2820,75 @@ dependencies = [ "serde", ] +[[package]] +name = "tonic" +version = "0.6.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ff08f4649d10a70ffa3522ca559031285d8e421d727ac85c60825761818f5d0a" +dependencies = [ + "async-stream", + "async-trait", + "base64 0.13.0", + "bytes", + "futures-core", + "futures-util", + "h2", + "http", + "http-body", + "hyper", + "hyper-timeout", + "percent-encoding", + "pin-project", + "prost", + "prost-derive", + "tokio", + "tokio-stream", + "tokio-util 0.6.9", + "tower", + "tower-layer", + "tower-service", + "tracing", + "tracing-futures", +] + +[[package]] +name = "tonic-build" +version = "0.6.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "9403f1bafde247186684b230dc6f38b5cd514584e8bec1dd32514be4745fa757" +dependencies = [ + "proc-macro2", + "prost-build", + "quote", + "syn", +] + +[[package]] +name = "tower" +version = "0.4.12" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "9a89fd63ad6adf737582df5db40d286574513c69a11dac5214dc3b5603d6713e" +dependencies = [ + "futures-core", + "futures-util", + "indexmap", + "pin-project", + "pin-project-lite", + "rand", + "slab", + "tokio", + "tokio-util 0.7.0", + "tower-layer", + "tower-service", + "tracing", +] + +[[package]] +name = "tower-layer" +version = "0.3.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "343bc9466d3fe6b0f960ef45960509f84480bf4fd96f92901afe7ff3df9d3a62" + [[package]] name = "tower-service" version = "0.3.1" @@ -2676,6 +2902,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "2d8d93354fe2a8e50d5953f5ae2e47a3fc2ef03292e7ea46e3cc38f549525fb9" dependencies = [ "cfg-if", + "log", "pin-project-lite", "tracing-attributes", "tracing-core", @@ -2768,6 +2995,12 @@ dependencies = [ "tinyvec", ] +[[package]] +name = "unicode-segmentation" +version = "1.9.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "7e8820f5d777f6224dc4be3632222971ac30164d4a258d595640799554ebfd99" + [[package]] name = "unicode-width" version = "0.1.9" @@ -2838,6 +3071,7 @@ dependencies = [ "const_format", "crc32c", "daemonize", + "etcd-client", "fs2", "hex", "humantime", @@ -2850,11 +3084,13 @@ dependencies = [ "rust-s3", "serde", "serde_json", + "serde_with", "signal-hook", "tempfile", "tokio", "tokio-postgres 0.7.1 (git+https://github.com/zenithdb/rust-postgres.git?rev=2949d98df52587d562986aad155dd4e889e408b7)", "tracing", + "url", "walkdir", "workspace_hack", "zenith_metrics", diff --git a/control_plane/src/local_env.rs b/control_plane/src/local_env.rs index 00ace431e6..2bdc76e876 100644 --- a/control_plane/src/local_env.rs +++ b/control_plane/src/local_env.rs @@ -57,6 +57,10 @@ pub struct LocalEnv { #[serde(default)] pub private_key_path: PathBuf, + // A comma separated broker (etcd) endpoints for storage nodes coordination, e.g. 'http://127.0.0.1:2379'. + #[serde(default)] + pub broker_endpoints: Option, + pub pageserver: PageServerConf, #[serde(default)] diff --git a/control_plane/src/safekeeper.rs b/control_plane/src/safekeeper.rs index 969e2cd531..89ab0a31ee 100644 --- a/control_plane/src/safekeeper.rs +++ b/control_plane/src/safekeeper.rs @@ -73,6 +73,8 @@ pub struct SafekeeperNode { pub http_base_url: String, pub pageserver: Arc, + + broker_endpoints: Option, } impl SafekeeperNode { @@ -89,6 +91,7 @@ impl SafekeeperNode { http_client: Client::new(), http_base_url: format!("http://127.0.0.1:{}/v1", conf.http_port), pageserver, + broker_endpoints: env.broker_endpoints.clone(), } } @@ -135,6 +138,9 @@ impl SafekeeperNode { if !self.conf.sync { cmd.arg("--no-sync"); } + if let Some(ref ep) = self.broker_endpoints { + cmd.args(&["--broker-endpoints", ep]); + } if !cmd.status()?.success() { bail!( diff --git a/test_runner/README.md b/test_runner/README.md index a56c2df2c0..ee171ae6a0 100644 --- a/test_runner/README.md +++ b/test_runner/README.md @@ -10,6 +10,8 @@ Prerequisites: below to run from other directories. - The zenith git repo, including the postgres submodule (for some tests, e.g. `pg_regress`) +- Some tests (involving storage nodes coordination) require etcd installed. Follow + [`the guide`](https://etcd.io/docs/v3.5/install/) to obtain it. ### Test Organization diff --git a/test_runner/batch_others/test_wal_acceptor.py b/test_runner/batch_others/test_wal_acceptor.py index 37ce1a8bca..bdc526a125 100644 --- a/test_runner/batch_others/test_wal_acceptor.py +++ b/test_runner/batch_others/test_wal_acceptor.py @@ -13,7 +13,7 @@ from dataclasses import dataclass, field from multiprocessing import Process, Value from pathlib import Path from fixtures.zenith_fixtures import PgBin, Postgres, Safekeeper, ZenithEnv, ZenithEnvBuilder, PortDistributor, SafekeeperPort, zenith_binpath, PgProtocol -from fixtures.utils import lsn_to_hex, mkdir_if_needed, lsn_from_hex +from fixtures.utils import etcd_path, lsn_to_hex, mkdir_if_needed, lsn_from_hex from fixtures.log_helper import log from typing import List, Optional, Any @@ -22,6 +22,7 @@ from typing import List, Optional, Any # succeed and data is written def test_normal_work(zenith_env_builder: ZenithEnvBuilder): zenith_env_builder.num_safekeepers = 3 + zenith_env_builder.broker = True env = zenith_env_builder.init_start() env.zenith_cli.create_branch('test_wal_acceptors_normal_work') @@ -326,6 +327,49 @@ def test_race_conditions(zenith_env_builder: ZenithEnvBuilder, stop_value): proc.join() +# Test that safekeepers push their info to the broker and learn peer status from it +@pytest.mark.skipif(etcd_path() is None, reason="requires etcd which is not present in PATH") +def test_broker(zenith_env_builder: ZenithEnvBuilder): + zenith_env_builder.num_safekeepers = 3 + zenith_env_builder.broker = True + zenith_env_builder.enable_local_fs_remote_storage() + env = zenith_env_builder.init_start() + + env.zenith_cli.create_branch("test_broker", "main") + pg = env.postgres.create_start('test_broker') + pg.safe_psql("CREATE TABLE t(key int primary key, value text)") + + # learn zenith timeline from compute + tenant_id = pg.safe_psql("show zenith.zenith_tenant")[0][0] + timeline_id = pg.safe_psql("show zenith.zenith_timeline")[0][0] + + # wait until remote_consistent_lsn gets advanced on all safekeepers + clients = [sk.http_client() for sk in env.safekeepers] + stat_before = [cli.timeline_status(tenant_id, timeline_id) for cli in clients] + log.info(f"statuses is {stat_before}") + + pg.safe_psql("INSERT INTO t SELECT generate_series(1,100), 'payload'") + # force checkpoint to advance remote_consistent_lsn + with closing(env.pageserver.connect()) as psconn: + with psconn.cursor() as pscur: + pscur.execute(f"checkpoint {tenant_id} {timeline_id}") + # and wait till remote_consistent_lsn propagates to all safekeepers + started_at = time.time() + while True: + stat_after = [cli.timeline_status(tenant_id, timeline_id) for cli in clients] + if all( + lsn_from_hex(s_after.remote_consistent_lsn) > lsn_from_hex( + s_before.remote_consistent_lsn) for s_after, + s_before in zip(stat_after, stat_before)): + break + elapsed = time.time() - started_at + if elapsed > 20: + raise RuntimeError( + f"timed out waiting {elapsed:.0f}s for remote_consistent_lsn propagation: status before {stat_before}, status current {stat_after}" + ) + time.sleep(0.5) + + class ProposerPostgres(PgProtocol): """Object for running postgres without ZenithEnv""" def __init__(self, diff --git a/test_runner/fixtures/utils.py b/test_runner/fixtures/utils.py index 58f7294eb5..f16fe1d9cf 100644 --- a/test_runner/fixtures/utils.py +++ b/test_runner/fixtures/utils.py @@ -1,4 +1,5 @@ import os +import shutil import subprocess from typing import Any, List @@ -76,3 +77,8 @@ def print_gc_result(row): log.info( " total: {layers_total}, needed_by_cutoff {layers_needed_by_cutoff}, needed_by_branches: {layers_needed_by_branches}, not_updated: {layers_not_updated}, removed: {layers_removed}" .format_map(row)) + + +# path to etcd binary or None if not present. +def etcd_path(): + return shutil.which("etcd") diff --git a/test_runner/fixtures/zenith_fixtures.py b/test_runner/fixtures/zenith_fixtures.py index 2da021a49c..a95809687a 100644 --- a/test_runner/fixtures/zenith_fixtures.py +++ b/test_runner/fixtures/zenith_fixtures.py @@ -33,7 +33,7 @@ from typing_extensions import Literal import requests import backoff # type: ignore -from .utils import (get_self_dir, lsn_from_hex, mkdir_if_needed, subprocess_capture) +from .utils import (etcd_path, get_self_dir, mkdir_if_needed, subprocess_capture, lsn_from_hex) from fixtures.log_helper import log """ This file contains pytest fixtures. A fixture is a test resource that can be @@ -433,7 +433,8 @@ class ZenithEnvBuilder: num_safekeepers: int = 0, pageserver_auth_enabled: bool = False, rust_log_override: Optional[str] = None, - default_branch_name=DEFAULT_BRANCH_NAME): + default_branch_name=DEFAULT_BRANCH_NAME, + broker: bool = False): self.repo_dir = repo_dir self.rust_log_override = rust_log_override self.port_distributor = port_distributor @@ -442,6 +443,7 @@ class ZenithEnvBuilder: self.num_safekeepers = num_safekeepers self.pageserver_auth_enabled = pageserver_auth_enabled self.default_branch_name = default_branch_name + self.broker = broker self.env: Optional[ZenithEnv] = None self.s3_mock_server: Optional[MockS3Server] = None @@ -517,6 +519,8 @@ class ZenithEnvBuilder: self.env.pageserver.stop(immediate=True) if self.s3_mock_server: self.s3_mock_server.kill() + if self.env.broker is not None: + self.env.broker.stop() class ZenithEnv: @@ -569,6 +573,16 @@ class ZenithEnv: default_tenant_id = '{self.initial_tenant.hex}' """) + self.broker = None + if config.broker: + # keep etcd datadir inside 'repo' + self.broker = Etcd(datadir=os.path.join(self.repo_dir, "etcd"), + port=self.port_distributor.get_port(), + peer_port=self.port_distributor.get_port()) + toml += textwrap.dedent(f""" + broker_endpoints = 'http://127.0.0.1:{self.broker.port}' + """) + # Create config for pageserver pageserver_port = PageserverPort( pg=self.port_distributor.get_port(), @@ -611,12 +625,15 @@ class ZenithEnv: self.zenith_cli.init(toml) def start(self): - # Start up the page server and all the safekeepers + # Start up the page server, all the safekeepers and the broker self.pageserver.start() for safekeeper in self.safekeepers: safekeeper.start() + if self.broker is not None: + self.broker.start() + def get_safekeeper_connstrs(self) -> str: """ Get list of safekeeper endpoints suitable for wal_acceptors GUC """ return ','.join([f'localhost:{wa.port.pg}' for wa in self.safekeepers]) @@ -1674,6 +1691,7 @@ class Safekeeper: class SafekeeperTimelineStatus: acceptor_epoch: int flush_lsn: str + remote_consistent_lsn: str @dataclass @@ -1697,7 +1715,8 @@ class SafekeeperHttpClient(requests.Session): res.raise_for_status() resj = res.json() return SafekeeperTimelineStatus(acceptor_epoch=resj['acceptor_state']['epoch'], - flush_lsn=resj['flush_lsn']) + flush_lsn=resj['flush_lsn'], + remote_consistent_lsn=resj['remote_consistent_lsn']) def get_metrics(self) -> SafekeeperMetrics: request_result = self.get(f"http://localhost:{self.port}/metrics") @@ -1718,6 +1737,54 @@ class SafekeeperHttpClient(requests.Session): return metrics +@dataclass +class Etcd: + """ An object managing etcd instance """ + datadir: str + port: int + peer_port: int + handle: Optional[subprocess.Popen[Any]] = None # handle of running daemon + + def check_status(self): + s = requests.Session() + s.mount('http://', requests.adapters.HTTPAdapter(max_retries=1)) # do not retry + s.get(f"http://localhost:{self.port}/health").raise_for_status() + + def start(self): + pathlib.Path(self.datadir).mkdir(exist_ok=True) + etcd_full_path = etcd_path() + if etcd_full_path is None: + raise Exception('etcd not found') + + with open(os.path.join(self.datadir, "etcd.log"), "wb") as log_file: + args = [ + etcd_full_path, + f"--data-dir={self.datadir}", + f"--listen-client-urls=http://localhost:{self.port}", + f"--advertise-client-urls=http://localhost:{self.port}", + f"--listen-peer-urls=http://localhost:{self.peer_port}" + ] + self.handle = subprocess.Popen(args, stdout=log_file, stderr=log_file) + + # wait for start + started_at = time.time() + while True: + try: + self.check_status() + except Exception as e: + elapsed = time.time() - started_at + if elapsed > 5: + raise RuntimeError(f"timed out waiting {elapsed:.0f}s for etcd start: {e}") + time.sleep(0.5) + else: + break # success + + def stop(self): + if self.handle is not None: + self.handle.terminate() + self.handle.wait() + + def get_test_output_dir(request: Any) -> str: """ Compute the working directory for an individual test. """ test_name = request.node.name diff --git a/walkeeper/Cargo.toml b/walkeeper/Cargo.toml index f59c24816d..e8523d27d1 100644 --- a/walkeeper/Cargo.toml +++ b/walkeeper/Cargo.toml @@ -22,11 +22,14 @@ anyhow = "1.0" crc32c = "0.6.0" humantime = "2.1.0" walkdir = "2" +url = "2.2.2" signal-hook = "0.3.10" serde = { version = "1.0", features = ["derive"] } +serde_with = {version = "1.12.0"} hex = "0.4.3" const_format = "0.2.21" tokio-postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } +etcd-client = "0.8.3" postgres_ffi = { path = "../postgres_ffi" } zenith_metrics = { path = "../zenith_metrics" } diff --git a/walkeeper/src/bin/safekeeper.rs b/walkeeper/src/bin/safekeeper.rs index 6c45115e5f..b3087a1004 100644 --- a/walkeeper/src/bin/safekeeper.rs +++ b/walkeeper/src/bin/safekeeper.rs @@ -11,18 +11,19 @@ use std::io::{ErrorKind, Write}; use std::path::{Path, PathBuf}; use std::thread; use tracing::*; +use url::{ParseError, Url}; use walkeeper::control_file::{self}; use zenith_utils::http::endpoint; use zenith_utils::zid::ZNodeId; use zenith_utils::{logging, tcp_listener, GIT_VERSION}; use tokio::sync::mpsc; -use walkeeper::callmemaybe; use walkeeper::defaults::{DEFAULT_HTTP_LISTEN_ADDR, DEFAULT_PG_LISTEN_ADDR}; use walkeeper::http; use walkeeper::s3_offload; use walkeeper::wal_service; use walkeeper::SafeKeeperConf; +use walkeeper::{broker, callmemaybe}; use zenith_utils::shutdown::exit_now; use zenith_utils::signals; @@ -104,6 +105,11 @@ fn main() -> Result<()> { ) .arg( Arg::new("id").long("id").takes_value(true).help("safekeeper node id: integer") + ).arg( + Arg::new("broker-endpoints") + .long("broker-endpoints") + .takes_value(true) + .help("a comma separated broker (etcd) endpoints for storage nodes coordination, e.g. 'http://127.0.0.1:2379'"), ) .get_matches(); @@ -154,6 +160,11 @@ fn main() -> Result<()> { )); } + if let Some(addr) = arg_matches.value_of("broker-endpoints") { + let collected_ep: Result, ParseError> = addr.split(',').map(Url::parse).collect(); + conf.broker_endpoints = Some(collected_ep?); + } + start_safekeeper(conf, given_id, arg_matches.is_present("init")) } @@ -259,11 +270,12 @@ fn start_safekeeper(mut conf: SafeKeeperConf, given_id: Option, init: b threads.push(wal_acceptor_thread); + let conf_cloned = conf.clone(); let callmemaybe_thread = thread::Builder::new() .name("callmemaybe thread".into()) .spawn(|| { // thread code - let thread_result = callmemaybe::thread_main(conf, rx); + let thread_result = callmemaybe::thread_main(conf_cloned, rx); if let Err(e) = thread_result { error!("callmemaybe thread terminated: {}", e); } @@ -271,6 +283,17 @@ fn start_safekeeper(mut conf: SafeKeeperConf, given_id: Option, init: b .unwrap(); threads.push(callmemaybe_thread); + if conf.broker_endpoints.is_some() { + let conf_ = conf.clone(); + threads.push( + thread::Builder::new() + .name("broker thread".into()) + .spawn(|| { + broker::thread_main(conf_); + })?, + ); + } + // TODO: put more thoughts into handling of failed threads // We probably should restart them. diff --git a/walkeeper/src/broker.rs b/walkeeper/src/broker.rs new file mode 100644 index 0000000000..147497d673 --- /dev/null +++ b/walkeeper/src/broker.rs @@ -0,0 +1,211 @@ +//! Communication with etcd, providing safekeeper peers and pageserver coordination. + +use anyhow::bail; +use anyhow::Context; +use anyhow::Error; +use anyhow::Result; +use etcd_client::Client; +use etcd_client::EventType; +use etcd_client::PutOptions; +use etcd_client::WatchOptions; +use lazy_static::lazy_static; +use regex::Regex; +use serde::{Deserialize, Serialize}; +use serde_with::{serde_as, DisplayFromStr}; +use std::str::FromStr; +use std::time::Duration; +use tokio::task::JoinHandle; +use tokio::{runtime, time::sleep}; +use tracing::*; +use zenith_utils::zid::ZTenantId; +use zenith_utils::zid::ZTimelineId; +use zenith_utils::{ + lsn::Lsn, + zid::{ZNodeId, ZTenantTimelineId}, +}; + +use crate::{safekeeper::Term, timeline::GlobalTimelines, SafeKeeperConf}; + +const RETRY_INTERVAL_MSEC: u64 = 1000; +const PUSH_INTERVAL_MSEC: u64 = 1000; +const LEASE_TTL_SEC: i64 = 5; +// TODO: add global zenith installation ID. +const ZENITH_PREFIX: &str = "zenith"; + +/// Published data about safekeeper. Fields made optional for easy migrations. +#[serde_as] +#[derive(Deserialize, Serialize)] +pub struct SafekeeperInfo { + /// Term of the last entry. + pub last_log_term: Option, + /// LSN of the last record. + #[serde_as(as = "Option")] + pub flush_lsn: Option, + /// Up to which LSN safekeeper regards its WAL as committed. + #[serde_as(as = "Option")] + pub commit_lsn: Option, + /// LSN up to which safekeeper offloaded WAL to s3. + #[serde_as(as = "Option")] + pub s3_wal_lsn: Option, + /// LSN of last checkpoint uploaded by pageserver. + #[serde_as(as = "Option")] + pub remote_consistent_lsn: Option, + #[serde_as(as = "Option")] + pub peer_horizon_lsn: Option, +} + +pub fn thread_main(conf: SafeKeeperConf) { + let runtime = runtime::Builder::new_current_thread() + .enable_all() + .build() + .unwrap(); + + let _enter = info_span!("broker").entered(); + info!("started, broker endpoints {:?}", conf.broker_endpoints); + + runtime.block_on(async { + main_loop(conf).await; + }); +} + +/// Prefix to timeline related data. +fn timeline_path(zttid: &ZTenantTimelineId) -> String { + format!( + "{}/{}/{}", + ZENITH_PREFIX, zttid.tenant_id, zttid.timeline_id + ) +} + +/// Key to per timeline per safekeeper data. +fn timeline_safekeeper_path(zttid: &ZTenantTimelineId, sk_id: ZNodeId) -> String { + format!("{}/safekeeper/{}", timeline_path(zttid), sk_id) +} + +/// Push once in a while data about all active timelines to the broker. +async fn push_loop(conf: SafeKeeperConf) -> Result<()> { + let mut client = Client::connect(conf.broker_endpoints.as_ref().unwrap(), None).await?; + + // Get and maintain lease to automatically delete obsolete data + let lease = client.lease_grant(LEASE_TTL_SEC, None).await?; + let (mut keeper, mut ka_stream) = client.lease_keep_alive(lease.id()).await?; + + let push_interval = Duration::from_millis(PUSH_INTERVAL_MSEC); + loop { + // Note: we lock runtime here and in timeline methods as GlobalTimelines + // is under plain mutex. That's ok, all this code is not performance + // sensitive and there is no risk of deadlock as we don't await while + // lock is held. + let active_tlis = GlobalTimelines::get_active_timelines(); + for zttid in &active_tlis { + if let Ok(tli) = GlobalTimelines::get(&conf, *zttid, false) { + let sk_info = tli.get_public_info(); + let put_opts = PutOptions::new().with_lease(lease.id()); + client + .put( + timeline_safekeeper_path(zttid, conf.my_id), + serde_json::to_string(&sk_info)?, + Some(put_opts), + ) + .await + .context("failed to push safekeeper info")?; + } + } + // revive the lease + keeper + .keep_alive() + .await + .context("failed to send LeaseKeepAliveRequest")?; + ka_stream + .message() + .await + .context("failed to receive LeaseKeepAliveResponse")?; + sleep(push_interval).await; + } +} + +/// Subscribe and fetch all the interesting data from the broker. +async fn pull_loop(conf: SafeKeeperConf) -> Result<()> { + lazy_static! { + static ref TIMELINE_SAFEKEEPER_RE: Regex = + Regex::new(r"^zenith/([[:xdigit:]]+)/([[:xdigit:]]+)/safekeeper/([[:digit:]])$") + .unwrap(); + } + let mut client = Client::connect(conf.broker_endpoints.as_ref().unwrap(), None).await?; + loop { + let wo = WatchOptions::new().with_prefix(); + // TODO: subscribe only to my timelines + let (_, mut stream) = client.watch(ZENITH_PREFIX, Some(wo)).await?; + while let Some(resp) = stream.message().await? { + if resp.canceled() { + bail!("watch canceled"); + } + + for event in resp.events() { + if EventType::Put == event.event_type() { + if let Some(kv) = event.kv() { + if let Some(caps) = TIMELINE_SAFEKEEPER_RE.captures(kv.key_str()?) { + let tenant_id = ZTenantId::from_str(caps.get(1).unwrap().as_str())?; + let timeline_id = ZTimelineId::from_str(caps.get(2).unwrap().as_str())?; + let zttid = ZTenantTimelineId::new(tenant_id, timeline_id); + let safekeeper_id = ZNodeId(caps.get(3).unwrap().as_str().parse()?); + let value_str = kv.value_str()?; + match serde_json::from_str::(value_str) { + Ok(safekeeper_info) => { + if let Ok(tli) = GlobalTimelines::get(&conf, zttid, false) { + tli.record_safekeeper_info(&safekeeper_info, safekeeper_id)? + } + } + Err(err) => warn!( + "failed to deserialize safekeeper info {}: {}", + value_str, err + ), + } + } + } + } + } + } + } +} + +async fn main_loop(conf: SafeKeeperConf) { + let mut ticker = tokio::time::interval(Duration::from_millis(RETRY_INTERVAL_MSEC)); + let mut push_handle: Option>> = None; + let mut pull_handle: Option>> = None; + // Selecting on JoinHandles requires some squats; is there a better way to + // reap tasks individually? + + // Handling failures in task itself won't catch panic and in Tokio, task's + // panic doesn't kill the whole executor, so it is better to do reaping + // here. + loop { + tokio::select! { + res = async { push_handle.as_mut().unwrap().await }, if push_handle.is_some() => { + // was it panic or normal error? + let err = match res { + Ok(res_internal) => res_internal.unwrap_err(), + Err(err_outer) => err_outer.into(), + }; + warn!("push task failed: {:?}", err); + push_handle = None; + }, + res = async { pull_handle.as_mut().unwrap().await }, if pull_handle.is_some() => { + // was it panic or normal error? + let err = match res { + Ok(res_internal) => res_internal.unwrap_err(), + Err(err_outer) => err_outer.into(), + }; + warn!("pull task failed: {:?}", err); + pull_handle = None; + }, + _ = ticker.tick() => { + if push_handle.is_none() { + push_handle = Some(tokio::spawn(push_loop(conf.clone()))); + } + if pull_handle.is_none() { + pull_handle = Some(tokio::spawn(pull_loop(conf.clone()))); + } + } + } + } +} diff --git a/walkeeper/src/handler.rs b/walkeeper/src/handler.rs index ead6fab9fb..00d177da56 100644 --- a/walkeeper/src/handler.rs +++ b/walkeeper/src/handler.rs @@ -168,7 +168,14 @@ impl SafekeeperPostgresHandler { fn handle_identify_system(&mut self, pgb: &mut PostgresBackend) -> Result<()> { let start_pos = self.timeline.get().get_end_of_wal(); let lsn = start_pos.to_string(); - let sysid = self.timeline.get().get_info().server.system_id.to_string(); + let sysid = self + .timeline + .get() + .get_state() + .1 + .server + .system_id + .to_string(); let lsn_bytes = lsn.as_bytes(); let tli = PG_TLI.to_string(); let tli_bytes = tli.as_bytes(); diff --git a/walkeeper/src/http/routes.rs b/walkeeper/src/http/routes.rs index 74f7f4a735..06a0682c37 100644 --- a/walkeeper/src/http/routes.rs +++ b/walkeeper/src/http/routes.rs @@ -86,23 +86,24 @@ async fn timeline_status_handler(request: Request) -> Result Result<()> { fn send_proposer_elected(spg: &mut SafekeeperPostgresHandler, term: Term, lsn: Lsn) -> Result<()> { // add new term to existing history - let history = spg.timeline.get().get_info().acceptor_state.term_history; + let history = spg.timeline.get().get_state().1.acceptor_state.term_history; let history = history.up_to(lsn.checked_sub(1u64).unwrap()); let mut history_entries = history.0; history_entries.push(TermSwitchEntry { term, lsn }); @@ -142,7 +142,7 @@ fn append_logical_message( msg: &AppendLogicalMessage, ) -> Result { let wal_data = encode_logical_message(&msg.lm_prefix, &msg.lm_message); - let sk_state = spg.timeline.get().get_info(); + let sk_state = spg.timeline.get().get_state().1; let begin_lsn = msg.begin_lsn; let end_lsn = begin_lsn + wal_data.len() as u64; diff --git a/walkeeper/src/lib.rs b/walkeeper/src/lib.rs index dfd71e4de2..69423d42d8 100644 --- a/walkeeper/src/lib.rs +++ b/walkeeper/src/lib.rs @@ -1,9 +1,11 @@ // use std::path::PathBuf; use std::time::Duration; +use url::Url; use zenith_utils::zid::{ZNodeId, ZTenantTimelineId}; +pub mod broker; pub mod callmemaybe; pub mod control_file; pub mod control_file_upgrade; @@ -47,6 +49,7 @@ pub struct SafeKeeperConf { pub ttl: Option, pub recall_period: Duration, pub my_id: ZNodeId, + pub broker_endpoints: Option>, } impl SafeKeeperConf { @@ -71,6 +74,7 @@ impl Default for SafeKeeperConf { ttl: None, recall_period: defaults::DEFAULT_RECALL_PERIOD, my_id: ZNodeId(0), + broker_endpoints: None, } } } diff --git a/walkeeper/src/safekeeper.rs b/walkeeper/src/safekeeper.rs index 8300b32b42..307a67e5f3 100644 --- a/walkeeper/src/safekeeper.rs +++ b/walkeeper/src/safekeeper.rs @@ -193,7 +193,7 @@ pub struct SafeKeeperState { pub peer_horizon_lsn: Lsn, /// LSN of the oldest known checkpoint made by pageserver and successfully /// pushed to s3. We don't remove WAL beyond it. Persisted only for - /// informational purposes, we receive it from pageserver. + /// informational purposes, we receive it from pageserver (or broker). pub remote_consistent_lsn: Lsn, // Peers and their state as we remember it. Knowing peers themselves is // fundamental; but state is saved here only for informational purposes and @@ -203,11 +203,13 @@ pub struct SafeKeeperState { } #[derive(Debug, Clone)] -// In memory safekeeper state. Fields mirror ones in `SafeKeeperState`; they are -// not flushed yet. +// In memory safekeeper state. Fields mirror ones in `SafeKeeperState`; values +// are not flushed yet. pub struct SafekeeperMemState { pub commit_lsn: Lsn, + pub s3_wal_lsn: Lsn, // TODO: keep only persistent version pub peer_horizon_lsn: Lsn, + pub remote_consistent_lsn: Lsn, } impl SafeKeeperState { @@ -494,14 +496,13 @@ pub struct SafeKeeper { metrics: SafeKeeperMetrics, /// Maximum commit_lsn between all nodes, can be ahead of local flush_lsn. - global_commit_lsn: Lsn, + pub global_commit_lsn: Lsn, /// LSN since the proposer safekeeper currently talking to appends WAL; /// determines epoch switch point. epoch_start_lsn: Lsn, pub inmem: SafekeeperMemState, // in memory part - - pub s: SafeKeeperState, // persistent part + pub s: SafeKeeperState, // persistent part pub control_store: CTRL, pub wal_store: WAL, @@ -529,7 +530,9 @@ where epoch_start_lsn: Lsn(0), inmem: SafekeeperMemState { commit_lsn: state.commit_lsn, + s3_wal_lsn: state.s3_wal_lsn, peer_horizon_lsn: state.peer_horizon_lsn, + remote_consistent_lsn: state.remote_consistent_lsn, }, s: state, control_store, @@ -545,8 +548,7 @@ where .up_to(self.wal_store.flush_lsn()) } - #[cfg(test)] - fn get_epoch(&self) -> Term { + pub fn get_epoch(&self) -> Term { self.s.acceptor_state.get_epoch(self.wal_store.flush_lsn()) } @@ -697,7 +699,7 @@ where } /// Advance commit_lsn taking into account what we have locally - fn update_commit_lsn(&mut self) -> Result<()> { + pub fn update_commit_lsn(&mut self) -> Result<()> { let commit_lsn = min(self.global_commit_lsn, self.wal_store.flush_lsn()); assert!(commit_lsn >= self.inmem.commit_lsn); diff --git a/walkeeper/src/send_wal.rs b/walkeeper/src/send_wal.rs index 1febd71842..f12fb5cb4a 100644 --- a/walkeeper/src/send_wal.rs +++ b/walkeeper/src/send_wal.rs @@ -230,7 +230,7 @@ impl ReplicationConn { let mut wal_seg_size: usize; loop { - wal_seg_size = spg.timeline.get().get_info().server.wal_seg_size as usize; + wal_seg_size = spg.timeline.get().get_state().1.server.wal_seg_size as usize; if wal_seg_size == 0 { error!("Cannot start replication before connecting to wal_proposer"); sleep(Duration::from_secs(1)); diff --git a/walkeeper/src/timeline.rs b/walkeeper/src/timeline.rs index b53f2e086b..b10ab97cc1 100644 --- a/walkeeper/src/timeline.rs +++ b/walkeeper/src/timeline.rs @@ -17,12 +17,14 @@ use tracing::*; use zenith_utils::lsn::Lsn; use zenith_utils::zid::{ZNodeId, ZTenantTimelineId}; +use crate::broker::SafekeeperInfo; use crate::callmemaybe::{CallmeEvent, SubscriptionStateKey}; use crate::control_file; use crate::control_file::Storage as cf_storage; use crate::safekeeper::{ AcceptorProposerMessage, ProposerAcceptorMessage, SafeKeeper, SafeKeeperState, + SafekeeperMemState, }; use crate::send_wal::HotStandbyFeedback; use crate::wal_storage; @@ -349,6 +351,11 @@ impl Timeline { Ok(false) } + fn is_active(&self) -> bool { + let shared_state = self.mutex.lock().unwrap(); + shared_state.active + } + /// Timed wait for an LSN to be committed. /// /// Returns the last committed LSN, which will be at least @@ -410,8 +417,61 @@ impl Timeline { Ok(rmsg) } - pub fn get_info(&self) -> SafeKeeperState { - self.mutex.lock().unwrap().sk.s.clone() + pub fn get_state(&self) -> (SafekeeperMemState, SafeKeeperState) { + let shared_state = self.mutex.lock().unwrap(); + (shared_state.sk.inmem.clone(), shared_state.sk.s.clone()) + } + + /// Prepare public safekeeper info for reporting. + pub fn get_public_info(&self) -> SafekeeperInfo { + let shared_state = self.mutex.lock().unwrap(); + SafekeeperInfo { + last_log_term: Some(shared_state.sk.get_epoch()), + flush_lsn: Some(shared_state.sk.wal_store.flush_lsn()), + // note: this value is not flushed to control file yet and can be lost + commit_lsn: Some(shared_state.sk.inmem.commit_lsn), + s3_wal_lsn: Some(shared_state.sk.inmem.s3_wal_lsn), + // TODO: rework feedbacks to avoid max here + remote_consistent_lsn: Some(max( + shared_state.get_replicas_state().remote_consistent_lsn, + shared_state.sk.inmem.remote_consistent_lsn, + )), + peer_horizon_lsn: Some(shared_state.sk.inmem.peer_horizon_lsn), + } + } + + /// Update timeline state with peer safekeeper data. + pub fn record_safekeeper_info(&self, sk_info: &SafekeeperInfo, _sk_id: ZNodeId) -> Result<()> { + let mut shared_state = self.mutex.lock().unwrap(); + // Note: the check is too restrictive, generally we can update local + // commit_lsn if our history matches (is part of) history of advanced + // commit_lsn provider. + if let (Some(commit_lsn), Some(last_log_term)) = (sk_info.commit_lsn, sk_info.last_log_term) + { + if last_log_term == shared_state.sk.get_epoch() { + shared_state.sk.global_commit_lsn = + max(commit_lsn, shared_state.sk.global_commit_lsn); + shared_state.sk.update_commit_lsn()?; + let local_commit_lsn = min(commit_lsn, shared_state.sk.wal_store.flush_lsn()); + shared_state.sk.inmem.commit_lsn = + max(local_commit_lsn, shared_state.sk.inmem.commit_lsn); + } + } + if let Some(s3_wal_lsn) = sk_info.s3_wal_lsn { + shared_state.sk.inmem.s3_wal_lsn = max(s3_wal_lsn, shared_state.sk.inmem.s3_wal_lsn); + } + if let Some(remote_consistent_lsn) = sk_info.remote_consistent_lsn { + shared_state.sk.inmem.remote_consistent_lsn = max( + remote_consistent_lsn, + shared_state.sk.inmem.remote_consistent_lsn, + ); + } + if let Some(peer_horizon_lsn) = sk_info.peer_horizon_lsn { + shared_state.sk.inmem.peer_horizon_lsn = + max(peer_horizon_lsn, shared_state.sk.inmem.peer_horizon_lsn); + } + // TODO: sync control file + Ok(()) } pub fn add_replica(&self, state: ReplicaState) -> usize { @@ -495,7 +555,7 @@ impl GlobalTimelines { } /// Get a timeline with control file loaded from the global TIMELINES map. - /// If control file doesn't exist, bails out. + /// If control file doesn't exist and create=false, bails out. pub fn get( conf: &SafeKeeperConf, zttid: ZTenantTimelineId, @@ -537,4 +597,14 @@ impl GlobalTimelines { } } } + + /// Get ZTenantTimelineIDs of all active timelines. + pub fn get_active_timelines() -> Vec { + let timelines = TIMELINES.lock().unwrap(); + timelines + .iter() + .filter(|&(_, tli)| tli.is_active()) + .map(|(zttid, _)| *zttid) + .collect() + } } From ce0243bc12db72dba8b196dbee71af2434d28ead Mon Sep 17 00:00:00 2001 From: Arthur Petukhovsky Date: Tue, 29 Mar 2022 18:54:24 +0300 Subject: [PATCH 47/83] Add metric for last_record_lsn (#1430) --- pageserver/src/layered_repository.rs | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 56d14fd4e9..33f5694879 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -48,7 +48,9 @@ use crate::walredo::WalRedoManager; use crate::CheckpointConfig; use crate::{ZTenantId, ZTimelineId}; -use zenith_metrics::{register_histogram_vec, Histogram, HistogramVec}; +use zenith_metrics::{ + register_histogram_vec, register_int_gauge_vec, Histogram, HistogramVec, IntGauge, IntGaugeVec, +}; use zenith_utils::crashsafe_dir; use zenith_utils::lsn::{AtomicLsn, Lsn, RecordLsn}; use zenith_utils::seqwait::SeqWait; @@ -95,6 +97,15 @@ lazy_static! { .expect("failed to define a metric"); } +lazy_static! { + static ref LAST_RECORD_LSN: IntGaugeVec = register_int_gauge_vec!( + "pageserver_last_record_lsn", + "Last record LSN grouped by timeline", + &["tenant_id", "timeline_id"] + ) + .expect("failed to define a metric"); +} + /// Parts of the `.zenith/tenants//timelines/` directory prefix. pub const TIMELINES_SEGMENT_NAME: &str = "timelines"; @@ -745,11 +756,12 @@ pub struct LayeredTimeline { ancestor_timeline: Option, ancestor_lsn: Lsn, - // Metrics histograms + // Metrics reconstruct_time_histo: Histogram, flush_time_histo: Histogram, compact_time_histo: Histogram, create_images_time_histo: Histogram, + last_record_gauge: IntGauge, /// If `true`, will backup its files that appear after each checkpointing to the remote storage. upload_layers: AtomicBool, @@ -982,6 +994,9 @@ impl LayeredTimeline { &timelineid.to_string(), ]) .unwrap(); + let last_record_gauge = LAST_RECORD_LSN + .get_metric_with_label_values(&[&tenantid.to_string(), &timelineid.to_string()]) + .unwrap(); LayeredTimeline { conf, @@ -1007,6 +1022,7 @@ impl LayeredTimeline { flush_time_histo, compact_time_histo, create_images_time_histo, + last_record_gauge, upload_layers: AtomicBool::new(upload_layers), @@ -1325,6 +1341,7 @@ impl LayeredTimeline { fn finish_write(&self, new_lsn: Lsn) { assert!(new_lsn.is_aligned()); + self.last_record_gauge.set(new_lsn.0 as i64); self.last_record_lsn.advance(new_lsn); } From 277e41f4b73d91bfb96383eab1f42c4e5f7a0ad9 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Tue, 29 Mar 2022 13:48:26 +0300 Subject: [PATCH 48/83] Show s3 spans in logs and improve the log messages --- pageserver/src/remote_storage/storage_sync.rs | 8 ++++---- zenith_utils/src/http/endpoint.rs | 2 +- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/pageserver/src/remote_storage/storage_sync.rs b/pageserver/src/remote_storage/storage_sync.rs index cd6c40b46f..50a260491b 100644 --- a/pageserver/src/remote_storage/storage_sync.rs +++ b/pageserver/src/remote_storage/storage_sync.rs @@ -321,8 +321,8 @@ pub fn schedule_timeline_checkpoint_upload( tenant_id, timeline_id ) } else { - warn!( - "Could not send an upload task for tenant {}, timeline {}: the sync queue is not initialized", + debug!( + "Upload task for tenant {}, timeline {} sent", tenant_id, timeline_id ) } @@ -455,7 +455,7 @@ fn storage_sync_loop< max_concurrent_sync, max_sync_errors, ) - .instrument(debug_span!("storage_sync_loop_step")) => step, + .instrument(info_span!("storage_sync_loop_step")) => step, _ = thread_mgr::shutdown_watcher() => LoopStep::Shutdown, } }); @@ -528,7 +528,7 @@ async fn loop_step< let extra_step = match tokio::spawn( process_task(conf, Arc::clone(&remote_assets), task, max_sync_errors).instrument( - debug_span!("process_sync_task", sync_id = %sync_id, attempt, sync_name), + info_span!("process_sync_task", sync_id = %sync_id, attempt, sync_name), ), ) .await diff --git a/zenith_utils/src/http/endpoint.rs b/zenith_utils/src/http/endpoint.rs index 0be08f45e1..7669f18cd2 100644 --- a/zenith_utils/src/http/endpoint.rs +++ b/zenith_utils/src/http/endpoint.rs @@ -160,7 +160,7 @@ pub fn serve_thread_main( where S: Future + Send + Sync, { - info!("Starting a http endpoint at {}", listener.local_addr()?); + info!("Starting an HTTP endpoint at {}", listener.local_addr()?); // Create a Service from the router above to handle incoming requests. let service = RouterService::new(router_builder.build().map_err(|err| anyhow!(err))?).unwrap(); From 5c5629910f33bead0150821217c115db5ece5495 Mon Sep 17 00:00:00 2001 From: Anton Shyrabokau <97127717+antons-antons@users.noreply.github.com> Date: Tue, 29 Mar 2022 22:13:06 -0700 Subject: [PATCH 49/83] Add a test case for reading historic page versions (#1314) * Add a test case for reading historic page versions Test read_page_at_lsn returns correct results when compared to page inspect. Validate possiblity of reading pages from dropped relation. Ensure funcitons read latest version when null lsn supplied. Check that functions do not poison buffer cache with stale page versions. --- Makefile | 5 + .../batch_others/test_read_validation.py | 183 ++++++++++++++++++ vendor/postgres | 2 +- 3 files changed, 189 insertions(+), 1 deletion(-) create mode 100644 test_runner/batch_others/test_read_validation.py diff --git a/Makefile b/Makefile index ef26ceee2d..d2a79661f2 100644 --- a/Makefile +++ b/Makefile @@ -78,6 +78,11 @@ postgres: postgres-configure \ $(MAKE) -C tmp_install/build/contrib/zenith install +@echo "Compiling contrib/zenith_test_utils" $(MAKE) -C tmp_install/build/contrib/zenith_test_utils install + +@echo "Compiling pg_buffercache" + $(MAKE) -C tmp_install/build/contrib/pg_buffercache install + +@echo "Compiling pageinspect" + $(MAKE) -C tmp_install/build/contrib/pageinspect install + .PHONY: postgres-clean postgres-clean: diff --git a/test_runner/batch_others/test_read_validation.py b/test_runner/batch_others/test_read_validation.py new file mode 100644 index 0000000000..ee41e6511c --- /dev/null +++ b/test_runner/batch_others/test_read_validation.py @@ -0,0 +1,183 @@ +from contextlib import closing + +from fixtures.zenith_fixtures import ZenithEnv +from fixtures.log_helper import log + +from psycopg2.errors import UndefinedTable +from psycopg2.errors import IoError + +pytest_plugins = ("fixtures.zenith_fixtures") + +extensions = ["pageinspect", "zenith_test_utils", "pg_buffercache"] + + +# +# Validation of reading different page versions +# +def test_read_validation(zenith_simple_env: ZenithEnv): + env = zenith_simple_env + env.zenith_cli.create_branch("test_read_validation", "empty") + + pg = env.postgres.create_start("test_read_validation") + log.info("postgres is running on 'test_read_validation' branch") + + with closing(pg.connect()) as con: + with con.cursor() as c: + + for e in extensions: + c.execute("create extension if not exists {};".format(e)) + + c.execute("create table foo (c int) with (autovacuum_enabled = false)") + c.execute("insert into foo values (1)") + + c.execute("select lsn, lower, upper from page_header(get_raw_page('foo', 'main', 0));") + first = c.fetchone() + + c.execute("select relfilenode from pg_class where relname = 'foo'") + relfilenode = c.fetchone()[0] + + c.execute("insert into foo values (2);") + c.execute("select lsn, lower, upper from page_header(get_raw_page('foo', 'main', 0));") + second = c.fetchone() + + assert first != second, "Failed to update page" + + log.info("Test table is populated, validating buffer cache") + + c.execute( + "select count(*) from pg_buffercache where relfilenode = {}".format(relfilenode)) + assert c.fetchone()[0] > 0, "No buffers cached for the test relation" + + c.execute( + "select reltablespace, reldatabase, relfilenode from pg_buffercache where relfilenode = {}" + .format(relfilenode)) + reln = c.fetchone() + + log.info("Clear buffer cache to ensure no stale pages are brought into the cache") + + c.execute("select clear_buffer_cache()") + + c.execute( + "select count(*) from pg_buffercache where relfilenode = {}".format(relfilenode)) + assert c.fetchone()[0] == 0, "Failed to clear buffer cache" + + log.info("Cache is clear, reading stale page version") + + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn('foo', 'main', 0, '{}'))" + .format(first[0])) + direct_first = c.fetchone() + assert first == direct_first, "Failed fetch page at historic lsn" + + c.execute( + "select count(*) from pg_buffercache where relfilenode = {}".format(relfilenode)) + assert c.fetchone()[0] == 0, "relation buffers detected after invalidation" + + log.info("Cache is clear, reading latest page version without cache") + + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn('foo', 'main', 0, NULL))" + ) + direct_latest = c.fetchone() + assert second == direct_latest, "Failed fetch page at latest lsn" + + c.execute( + "select count(*) from pg_buffercache where relfilenode = {}".format(relfilenode)) + assert c.fetchone()[0] == 0, "relation buffers detected after invalidation" + + log.info( + "Cache is clear, reading stale page version without cache using relation identifiers" + ) + + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn( {}, {}, {}, 0, 0, '{}' ))" + .format(reln[0], reln[1], reln[2], first[0])) + direct_first = c.fetchone() + assert first == direct_first, "Failed fetch page at historic lsn using oid" + + log.info( + "Cache is clear, reading latest page version without cache using relation identifiers" + ) + + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn( {}, {}, {}, 0, 0, NULL ))" + .format(reln[0], reln[1], reln[2])) + direct_latest = c.fetchone() + assert second == direct_latest, "Failed fetch page at latest lsn" + + c.execute('drop table foo;') + + log.info( + "Relation dropped, attempting reading stale page version without cache using relation identifiers" + ) + + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn( {}, {}, {}, 0, 0, '{}' ))" + .format(reln[0], reln[1], reln[2], first[0])) + direct_first = c.fetchone() + assert first == direct_first, "Failed fetch page at historic lsn using oid" + + log.info("Validation page inspect won't allow reading pages of dropped relations") + try: + c.execute("select * from page_header(get_raw_page('foo', 'main', 0));") + assert False, "query should have failed" + except UndefinedTable as e: + log.info("Caught an expected failure: {}".format(e)) + + +def test_read_validation_neg(zenith_simple_env: ZenithEnv): + env = zenith_simple_env + env.zenith_cli.create_branch("test_read_validation_neg", "empty") + + pg = env.postgres.create_start("test_read_validation_neg") + log.info("postgres is running on 'test_read_validation_neg' branch") + + with closing(pg.connect()) as con: + with con.cursor() as c: + + for e in extensions: + c.execute("create extension if not exists {};".format(e)) + + log.info("read a page of a missing relation") + try: + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn('Unknown', 'main', 0, '0/0'))" + ) + assert False, "query should have failed" + except UndefinedTable as e: + log.info("Caught an expected failure: {}".format(e)) + + c.execute("create table foo (c int) with (autovacuum_enabled = false)") + c.execute("insert into foo values (1)") + + log.info("read a page at lsn 0") + try: + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn('foo', 'main', 0, '0/0'))" + ) + assert False, "query should have failed" + except IoError as e: + log.info("Caught an expected failure: {}".format(e)) + + log.info("Pass NULL as an input") + expected = (None, None, None) + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn(NULL, 'main', 0, '0/0'))" + ) + assert c.fetchone() == expected, "Expected null output" + + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn('foo', NULL, 0, '0/0'))" + ) + assert c.fetchone() == expected, "Expected null output" + + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn('foo', 'main', NULL, '0/0'))" + ) + assert c.fetchone() == expected, "Expected null output" + + # This check is currently failing, reading beyond EOF is returning a 0-page + log.info("Read beyond EOF") + c.execute( + "select lsn, lower, upper from page_header(get_raw_page_at_lsn('foo', 'main', 1, NULL))" + ) diff --git a/vendor/postgres b/vendor/postgres index 19164aeacf..5c278ed0ac 160000 --- a/vendor/postgres +++ b/vendor/postgres @@ -1 +1 @@ -Subproject commit 19164aeacfd877ef75d67e70a71647f5d4c0cd2f +Subproject commit 5c278ed0aca5dea9340d9af4ad5f004d905ff1b7 From 860923420468a3882b71929f2dbe59673484ddca Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Tue, 29 Mar 2022 22:44:33 +0300 Subject: [PATCH 50/83] decrease the log level to debug because it is too noisy --- pageserver/src/layered_repository.rs | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 33f5694879..202a2ea756 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -1645,11 +1645,8 @@ impl LayeredTimeline { }; let num_deltas = layers.count_deltas(&img_range, &(img_lsn..lsn))?; - if num_deltas == 0 { - continue; - } - info!( + debug!( "range {}-{}, has {} deltas on this timeline", img_range.start, img_range.end, num_deltas ); From 649f324fe3b7dc5ff8b95cfaabf584753d53af16 Mon Sep 17 00:00:00 2001 From: Dmitry Rodionov Date: Wed, 30 Mar 2022 13:46:18 +0300 Subject: [PATCH 51/83] make logging in basebackup more consistent --- pageserver/src/basebackup.rs | 1 + pageserver/src/page_service.rs | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/pageserver/src/basebackup.rs b/pageserver/src/basebackup.rs index e2a56f17d6..3caf27b9b3 100644 --- a/pageserver/src/basebackup.rs +++ b/pageserver/src/basebackup.rs @@ -65,6 +65,7 @@ impl<'a> Basebackup<'a> { // prev_lsn to Lsn(0) if we cannot provide the correct value. let (backup_prev, backup_lsn) = if let Some(req_lsn) = req_lsn { // Backup was requested at a particular LSN. Wait for it to arrive. + info!("waiting for {}", req_lsn); timeline.tline.wait_lsn(req_lsn)?; // If the requested point is the end of the timeline, we can diff --git a/pageserver/src/page_service.rs b/pageserver/src/page_service.rs index 43e1ec275d..e7a4117b3e 100644 --- a/pageserver/src/page_service.rs +++ b/pageserver/src/page_service.rs @@ -514,6 +514,7 @@ impl PageServerHandler { ) -> anyhow::Result<()> { let span = info_span!("basebackup", timeline = %timelineid, tenant = %tenantid, lsn = field::Empty); let _enter = span.enter(); + info!("starting"); // check that the timeline exists let timeline = tenant_mgr::get_timeline_for_tenant_load(tenantid, timelineid) @@ -536,7 +537,7 @@ impl PageServerHandler { basebackup.send_tarball()?; } pgb.write_message(&BeMessage::CopyDone)?; - debug!("CopyDone sent!"); + info!("done"); Ok(()) } From 1aa8fe43cf9b769ec728b126a6a5c20b6f9d388f Mon Sep 17 00:00:00 2001 From: Konstantin Knizhnik Date: Thu, 31 Mar 2022 15:47:59 +0300 Subject: [PATCH 52/83] Fix race condition in image layer (#1440) * Fix race condition in image layer refer #1439 * Add explicit drop(inner) in layer load method * Add explicit drop(inner) in layer load method --- pageserver/src/layered_repository/image_layer.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs index ab51c36cae..ed9be913b9 100644 --- a/pageserver/src/layered_repository/image_layer.rs +++ b/pageserver/src/layered_repository/image_layer.rs @@ -267,7 +267,7 @@ impl ImageLayer { // a write lock. (Or rather, release and re-lock in write mode.) drop(inner); let mut inner = self.inner.write().unwrap(); - if inner.book.is_none() { + if !inner.loaded { self.load_inner(&mut inner)?; } else { // Another thread loaded it while we were not holding the lock. From a40b7cd516672a58d63de8015d848cd40ce33f08 Mon Sep 17 00:00:00 2001 From: Arthur Petukhovsky Date: Thu, 31 Mar 2022 17:00:09 +0300 Subject: [PATCH 53/83] Fix timeouts in test_restarts_under_load (#1436) * Enable backpressure in test_restarts_under_load * Remove hacks because #644 is fixed now * Adjust config in test_restarts_under_load --- .../batch_others/test_wal_acceptor_async.py | 30 +++++++++++-------- 1 file changed, 17 insertions(+), 13 deletions(-) diff --git a/test_runner/batch_others/test_wal_acceptor_async.py b/test_runner/batch_others/test_wal_acceptor_async.py index 31ace7eab3..aadafc76cf 100644 --- a/test_runner/batch_others/test_wal_acceptor_async.py +++ b/test_runner/batch_others/test_wal_acceptor_async.py @@ -1,9 +1,10 @@ import asyncio +import uuid import asyncpg import random import time -from fixtures.zenith_fixtures import ZenithEnvBuilder, Postgres, Safekeeper +from fixtures.zenith_fixtures import ZenithEnv, ZenithEnvBuilder, Postgres, Safekeeper from fixtures.log_helper import getLogger from fixtures.utils import lsn_from_hex, lsn_to_hex from typing import List @@ -30,10 +31,6 @@ class BankClient(object): await self.conn.execute('DROP TABLE IF EXISTS bank_log') await self.conn.execute('CREATE TABLE bank_log(from_uid int, to_uid int, amount int)') - # TODO: Remove when https://github.com/zenithdb/zenith/issues/644 is fixed - await self.conn.execute('ALTER TABLE bank_accs SET (autovacuum_enabled = false)') - await self.conn.execute('ALTER TABLE bank_log SET (autovacuum_enabled = false)') - async def check_invariant(self): row = await self.conn.fetchrow('SELECT sum(amount) AS sum FROM bank_accs') assert row['sum'] == self.n_accounts * self.init_amount @@ -139,12 +136,15 @@ async def wait_for_lsn(safekeeper: Safekeeper, # On each iteration 1 acceptor is stopped, and 2 others should allow # background workers execute transactions. In the end, state should remain # consistent. -async def run_restarts_under_load(pg: Postgres, acceptors: List[Safekeeper], n_workers=10): +async def run_restarts_under_load(env: ZenithEnv, + pg: Postgres, + acceptors: List[Safekeeper], + n_workers=10): n_accounts = 100 init_amount = 100000 max_transfer = 100 - period_time = 10 - iterations = 6 + period_time = 4 + iterations = 10 # Set timeout for this test at 5 minutes. It should be enough for test to complete # and less than CircleCI's no_output_timeout, taking into account that this timeout @@ -176,6 +176,11 @@ async def run_restarts_under_load(pg: Postgres, acceptors: List[Safekeeper], n_w flush_lsn = lsn_to_hex(flush_lsn) log.info(f'Postgres flush_lsn {flush_lsn}') + pageserver_lsn = env.pageserver.http_client().timeline_detail( + uuid.UUID(tenant_id), uuid.UUID((timeline_id)))["local"]["last_record_lsn"] + sk_ps_lag = lsn_from_hex(flush_lsn) - lsn_from_hex(pageserver_lsn) + log.info(f'Pageserver last_record_lsn={pageserver_lsn} lag={sk_ps_lag / 1024}kb') + # Wait until alive safekeepers catch up with postgres for idx, safekeeper in enumerate(acceptors): if idx != victim_idx: @@ -203,9 +208,8 @@ def test_restarts_under_load(zenith_env_builder: ZenithEnvBuilder): env = zenith_env_builder.init_start() env.zenith_cli.create_branch('test_wal_acceptors_restarts_under_load') - pg = env.postgres.create_start('test_wal_acceptors_restarts_under_load') + # Enable backpressure with 1MB maximal lag, because we don't want to block on `wait_for_lsn()` for too long + pg = env.postgres.create_start('test_wal_acceptors_restarts_under_load', + config_lines=['max_replication_write_lag=1MB']) - asyncio.run(run_restarts_under_load(pg, env.safekeepers)) - - # TODO: Remove when https://github.com/zenithdb/zenith/issues/644 is fixed - pg.stop() + asyncio.run(run_restarts_under_load(env, pg, env.safekeepers)) From 8745b022a985f6b758f9bddb9aae8038608df677 Mon Sep 17 00:00:00 2001 From: Anastasia Lubennikova Date: Thu, 31 Mar 2022 12:29:13 +0300 Subject: [PATCH 54/83] Extend LayerMap dump() function to print also open_layers and frozen_layers. Add verbose option to chose if we need to print all layer's keys or not. --- pageserver/src/bin/dump_layerfile.rs | 2 +- pageserver/src/layered_repository.rs | 8 ++++---- pageserver/src/layered_repository/delta_layer.rs | 6 +++++- pageserver/src/layered_repository/image_layer.rs | 6 +++++- .../src/layered_repository/inmemory_layer.rs | 6 +++++- pageserver/src/layered_repository/layer_map.rs | 16 ++++++++++++++-- .../src/layered_repository/storage_layer.rs | 2 +- 7 files changed, 35 insertions(+), 11 deletions(-) diff --git a/pageserver/src/bin/dump_layerfile.rs b/pageserver/src/bin/dump_layerfile.rs index b954ad5a15..27d41d50d9 100644 --- a/pageserver/src/bin/dump_layerfile.rs +++ b/pageserver/src/bin/dump_layerfile.rs @@ -25,7 +25,7 @@ fn main() -> Result<()> { // Basic initialization of things that don't change after startup virtual_file::init(10); - dump_layerfile_from_path(&path)?; + dump_layerfile_from_path(&path, true)?; Ok(()) } diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 202a2ea756..4a9d1c480d 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -2066,16 +2066,16 @@ impl<'a> TimelineWriter<'_> for LayeredTimelineWriter<'a> { } /// Dump contents of a layer file to stdout. -pub fn dump_layerfile_from_path(path: &Path) -> Result<()> { +pub fn dump_layerfile_from_path(path: &Path, verbose: bool) -> Result<()> { let file = File::open(path)?; let book = Book::new(file)?; match book.magic() { crate::DELTA_FILE_MAGIC => { - DeltaLayer::new_for_path(path, &book)?.dump()?; + DeltaLayer::new_for_path(path, &book)?.dump(verbose)?; } crate::IMAGE_FILE_MAGIC => { - ImageLayer::new_for_path(path, &book)?.dump()?; + ImageLayer::new_for_path(path, &book)?.dump(verbose)?; } magic => bail!("unrecognized magic identifier: {:?}", magic), } @@ -2216,7 +2216,7 @@ pub mod tests { let mut test_key = Key::from_hex("012222222233333333444444445500000000").unwrap(); let mut blknum = 0; for _ in 0..50 { - for _ in 0..1000 { + for _ in 0..10000 { test_key.field6 = blknum; let writer = tline.writer(); writer.put( diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs index bb5fa02be1..0e59eb7a3c 100644 --- a/pageserver/src/layered_repository/delta_layer.rs +++ b/pageserver/src/layered_repository/delta_layer.rs @@ -267,7 +267,7 @@ impl Layer for DeltaLayer { } /// debugging function to print out the contents of the layer - fn dump(&self) -> Result<()> { + fn dump(&self, verbose: bool) -> Result<()> { println!( "----- delta layer for ten {} tli {} keys {}-{} lsn {}-{} ----", self.tenantid, @@ -278,6 +278,10 @@ impl Layer for DeltaLayer { self.lsn_range.end ); + if !verbose { + return Ok(()); + } + let inner = self.load()?; let path = self.path(); diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs index ed9be913b9..2b9bf4a717 100644 --- a/pageserver/src/layered_repository/image_layer.rs +++ b/pageserver/src/layered_repository/image_layer.rs @@ -212,12 +212,16 @@ impl Layer for ImageLayer { } /// debugging function to print out the contents of the layer - fn dump(&self) -> Result<()> { + fn dump(&self, verbose: bool) -> Result<()> { println!( "----- image layer for ten {} tli {} key {}-{} at {} ----", self.tenantid, self.timelineid, self.key_range.start, self.key_range.end, self.lsn ); + if !verbose { + return Ok(()); + } + let inner = self.load()?; let mut index_vec: Vec<(&Key, &BlobRef)> = inner.index.iter().collect(); diff --git a/pageserver/src/layered_repository/inmemory_layer.rs b/pageserver/src/layered_repository/inmemory_layer.rs index b5d98a4ca3..8670442a2c 100644 --- a/pageserver/src/layered_repository/inmemory_layer.rs +++ b/pageserver/src/layered_repository/inmemory_layer.rs @@ -190,7 +190,7 @@ impl Layer for InMemoryLayer { } /// debugging function to print out the contents of the layer - fn dump(&self) -> Result<()> { + fn dump(&self, verbose: bool) -> Result<()> { let inner = self.inner.read().unwrap(); let end_str = inner @@ -204,6 +204,10 @@ impl Layer for InMemoryLayer { self.timelineid, self.start_lsn, end_str, ); + if !verbose { + return Ok(()); + } + let mut buf = Vec::new(); for (key, vec_map) in inner.index.iter() { for (lsn, blob_ref) in vec_map.as_slice() { diff --git a/pageserver/src/layered_repository/layer_map.rs b/pageserver/src/layered_repository/layer_map.rs index c4929a6173..b6a3bd82aa 100644 --- a/pageserver/src/layered_repository/layer_map.rs +++ b/pageserver/src/layered_repository/layer_map.rs @@ -392,10 +392,22 @@ impl LayerMap { /// debugging function to print out the contents of the layer map #[allow(unused)] - pub fn dump(&self) -> Result<()> { + pub fn dump(&self, verbose: bool) -> Result<()> { println!("Begin dump LayerMap"); + + println!("open_layer:"); + if let Some(open_layer) = &self.open_layer { + open_layer.dump(verbose)?; + } + + println!("frozen_layers:"); + for frozen_layer in self.frozen_layers.iter() { + frozen_layer.dump(verbose)?; + } + + println!("historic_layers:"); for layer in self.historic_layers.iter() { - layer.dump()?; + layer.dump(verbose)?; } println!("End dump LayerMap"); Ok(()) diff --git a/pageserver/src/layered_repository/storage_layer.rs b/pageserver/src/layered_repository/storage_layer.rs index de34545980..dcf5b63908 100644 --- a/pageserver/src/layered_repository/storage_layer.rs +++ b/pageserver/src/layered_repository/storage_layer.rs @@ -143,7 +143,7 @@ pub trait Layer: Send + Sync { fn delete(&self) -> Result<()>; /// Dump summary of the contents of the layer to stdout - fn dump(&self) -> Result<()>; + fn dump(&self, verbose: bool) -> Result<()>; } // Flag indicating that this version initialize the page From f5da6523882e2be24a5e4252be7c5f963fbc4c7c Mon Sep 17 00:00:00 2001 From: Dmitry Ivanov Date: Thu, 31 Mar 2022 20:44:57 +0300 Subject: [PATCH 55/83] [proxy] Enable keepalives for all tcp connections (#1448) --- Cargo.lock | 16 ++++++++++++---- compute_tools/Cargo.toml | 2 +- pageserver/Cargo.toml | 2 +- proxy/Cargo.toml | 3 ++- proxy/src/compute.rs | 1 + proxy/src/proxy.rs | 24 ++++++++++++++++++++++++ walkeeper/Cargo.toml | 2 +- zenith_utils/Cargo.toml | 2 +- 8 files changed, 43 insertions(+), 9 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index c770f576c9..bb27df7012 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -916,7 +916,7 @@ checksum = "418d37c8b1d42553c93648be529cb70f920d3baf8ef469b74b9638df426e0b4c" dependencies = [ "cfg-if", "libc", - "wasi", + "wasi 0.10.0+wasi-snapshot-preview1", ] [[package]] @@ -1371,14 +1371,15 @@ dependencies = [ [[package]] name = "mio" -version = "0.8.0" +version = "0.8.2" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "ba272f85fa0b41fc91872be579b3bbe0f56b792aa361a380eb669469f68dafb2" +checksum = "52da4364ffb0e4fe33a9841a98a3f3014fb964045ce4f7a45a398243c8d6b0c9" dependencies = [ "libc", "log", "miow", "ntapi", + "wasi 0.11.0+wasi-snapshot-preview1", "winapi", ] @@ -1931,6 +1932,7 @@ dependencies = [ "scopeguard", "serde", "serde_json", + "socket2", "thiserror", "tokio", "tokio-postgres 0.7.1 (git+https://github.com/zenithdb/rust-postgres.git?rev=2949d98df52587d562986aad155dd4e889e408b7)", @@ -2609,7 +2611,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255" dependencies = [ "libc", - "wasi", + "wasi 0.10.0+wasi-snapshot-preview1", "winapi", ] @@ -3113,6 +3115,12 @@ version = "0.10.0+wasi-snapshot-preview1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f" +[[package]] +name = "wasi" +version = "0.11.0+wasi-snapshot-preview1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423" + [[package]] name = "wasm-bindgen" version = "0.2.79" diff --git a/compute_tools/Cargo.toml b/compute_tools/Cargo.toml index 4ecf7f6499..56047093f1 100644 --- a/compute_tools/Cargo.toml +++ b/compute_tools/Cargo.toml @@ -16,5 +16,5 @@ regex = "1" serde = { version = "1.0", features = ["derive"] } serde_json = "1" tar = "0.4" -tokio = { version = "1", features = ["macros", "rt", "rt-multi-thread"] } +tokio = { version = "1.17", features = ["macros", "rt", "rt-multi-thread"] } workspace_hack = { version = "0.1", path = "../workspace_hack" } diff --git a/pageserver/Cargo.toml b/pageserver/Cargo.toml index 14eae31da8..6a77af1691 100644 --- a/pageserver/Cargo.toml +++ b/pageserver/Cargo.toml @@ -17,7 +17,7 @@ lazy_static = "1.4.0" log = "0.4.14" clap = "3.0" daemonize = "0.4.1" -tokio = { version = "1.11", features = ["process", "sync", "macros", "fs", "rt", "io-util", "time"] } +tokio = { version = "1.17", features = ["process", "sync", "macros", "fs", "rt", "io-util", "time"] } postgres-types = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } postgres-protocol = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } diff --git a/proxy/Cargo.toml b/proxy/Cargo.toml index 72c394dad4..dc20695884 100644 --- a/proxy/Cargo.toml +++ b/proxy/Cargo.toml @@ -22,8 +22,9 @@ rustls = "0.19.1" scopeguard = "1.1.0" serde = "1" serde_json = "1" +socket2 = "0.4.4" thiserror = "1.0" -tokio = { version = "1.11", features = ["macros"] } +tokio = { version = "1.17", features = ["macros"] } tokio-postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } tokio-rustls = "0.22.0" diff --git a/proxy/src/compute.rs b/proxy/src/compute.rs index 64ce5d0a5a..7c0ab965a0 100644 --- a/proxy/src/compute.rs +++ b/proxy/src/compute.rs @@ -41,6 +41,7 @@ impl DatabaseInfo { let host_port = format!("{}:{}", self.host, self.port); let socket = TcpStream::connect(host_port).await?; let socket_addr = socket.peer_addr()?; + socket2::SockRef::from(&socket).set_keepalive(true)?; Ok((socket_addr, socket)) } diff --git a/proxy/src/proxy.rs b/proxy/src/proxy.rs index 3c7f59bc26..81581b5cf1 100644 --- a/proxy/src/proxy.rs +++ b/proxy/src/proxy.rs @@ -50,6 +50,10 @@ pub async fn thread_main( println!("proxy has shut down"); } + // When set for the server socket, the keepalive setting + // will be inherited by all accepted client sockets. + socket2::SockRef::from(&listener).set_keepalive(true)?; + let cancel_map = Arc::new(CancelMap::default()); loop { let (socket, peer_addr) = listener.accept().await?; @@ -367,4 +371,24 @@ mod tests { Ok(()) } + + #[tokio::test] + async fn keepalive_is_inherited() -> anyhow::Result<()> { + use tokio::net::{TcpListener, TcpStream}; + + let listener = TcpListener::bind("127.0.0.1:0").await?; + let port = listener.local_addr()?.port(); + socket2::SockRef::from(&listener).set_keepalive(true)?; + + let t = tokio::spawn(async move { + let (client, _) = listener.accept().await?; + let keepalive = socket2::SockRef::from(&client).keepalive()?; + anyhow::Ok(keepalive) + }); + + let _ = TcpStream::connect(("127.0.0.1", port)).await?; + assert!(t.await??, "keepalive should be inherited"); + + Ok(()) + } } diff --git a/walkeeper/Cargo.toml b/walkeeper/Cargo.toml index e8523d27d1..ddce78e737 100644 --- a/walkeeper/Cargo.toml +++ b/walkeeper/Cargo.toml @@ -15,7 +15,7 @@ tracing = "0.1.27" clap = "3.0" daemonize = "0.4.1" rust-s3 = { version = "0.28", default-features = false, features = ["no-verify-ssl", "tokio-rustls-tls"] } -tokio = { version = "1.11", features = ["macros"] } +tokio = { version = "1.17", features = ["macros"] } postgres-protocol = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } anyhow = "1.0" diff --git a/zenith_utils/Cargo.toml b/zenith_utils/Cargo.toml index e8ad0e627f..cf864b3a54 100644 --- a/zenith_utils/Cargo.toml +++ b/zenith_utils/Cargo.toml @@ -16,7 +16,7 @@ routerify = "3" serde = { version = "1.0", features = ["derive"] } serde_json = "1" thiserror = "1.0" -tokio = { version = "1.11", features = ["macros"]} +tokio = { version = "1.17", features = ["macros"]} tracing = "0.1" tracing-subscriber = { version = "0.3", features = ["env-filter"] } nix = "0.23.0" From af712798e75589a5186fe3c78fa683b901fe2566 Mon Sep 17 00:00:00 2001 From: bojanserafimov Date: Fri, 1 Apr 2022 15:47:23 -0400 Subject: [PATCH 56/83] Fix pageserver readme formatting I put the diagram in a fixed-width block, since it wasn't rendering correctly on github. --- pageserver/README.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/pageserver/README.md b/pageserver/README.md index 69080a16cc..1fd627785c 100644 --- a/pageserver/README.md +++ b/pageserver/README.md @@ -13,7 +13,7 @@ keeps track of WAL records which are not synced to S3 yet. The Page Server consists of multiple threads that operate on a shared repository of page versions: - +``` | WAL V +--------------+ @@ -46,7 +46,7 @@ Legend: ---> Data flow <--- - +``` Page Service ------------ From 43c16c514556bb0ccbeb3b0458f46d39866005aa Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Fri, 1 Apr 2022 20:48:03 +0300 Subject: [PATCH 57/83] Don't log ZIds in the timeline load span --- pageserver/src/layered_repository.rs | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 4a9d1c480d..a352f31169 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -468,18 +468,20 @@ impl LayeredRepository { match timelines.get(&timelineid) { Some(entry) => match entry { LayeredTimelineEntry::Loaded(local_timeline) => { - trace!("timeline {} found loaded", &timelineid); + debug!("timeline {} found loaded into memory", &timelineid); return Ok(Some(Arc::clone(local_timeline))); } - LayeredTimelineEntry::Unloaded { .. } => { - trace!("timeline {} found unloaded", &timelineid) - } + LayeredTimelineEntry::Unloaded { .. } => {} }, None => { - trace!("timeline {} not found", &timelineid); + debug!("timeline {} not found", &timelineid); return Ok(None); } }; + debug!( + "timeline {} found on a local disk, but not loaded into the memory, loading", + &timelineid + ); let timeline = self.load_local_timeline(timelineid, timelines)?; let was_loaded = timelines.insert( timelineid, @@ -516,9 +518,7 @@ impl LayeredRepository { .context("cannot load ancestor timeline")? .flatten() .map(LayeredTimelineEntry::Loaded); - let _enter = - info_span!("loading timeline", timeline = %timelineid, tenant = %self.tenantid) - .entered(); + let _enter = info_span!("loading local timeline").entered(); let timeline = LayeredTimeline::new( self.conf, metadata, From 9e5423c86724cdd90cefd81791214870138b6983 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Fri, 1 Apr 2022 21:46:54 +0300 Subject: [PATCH 58/83] Assert in a more informative way --- postgres_ffi/src/xlog_utils.rs | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/postgres_ffi/src/xlog_utils.rs b/postgres_ffi/src/xlog_utils.rs index d2b2b5c122..89fdbbf7ac 100644 --- a/postgres_ffi/src/xlog_utils.rs +++ b/postgres_ffi/src/xlog_utils.rs @@ -495,7 +495,13 @@ mod tests { .env("DYLD_LIBRARY_PATH", &lib_path) .output() .unwrap(); - assert!(initdb_output.status.success()); + assert!( + initdb_output.status.success(), + "initdb failed. Status: '{}', stdout: '{}', stderr: '{}'", + initdb_output.status, + String::from_utf8_lossy(&initdb_output.stdout), + String::from_utf8_lossy(&initdb_output.stderr), + ); // 2. Pick WAL generated by initdb let wal_dir = data_dir.join("pg_wal"); From 4c9447589a837266fb943cc0f32124191891cd9a Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Fri, 1 Apr 2022 23:23:13 +0300 Subject: [PATCH 59/83] Place an info span into gc loop step --- pageserver/src/layered_repository.rs | 2 ++ 1 file changed, 2 insertions(+) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index a352f31169..f07a2639d3 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -630,6 +630,8 @@ impl LayeredRepository { horizon: u64, checkpoint_before_gc: bool, ) -> Result { + let _span_guard = + info_span!("gc iteration", tenant = %self.tenantid, timeline = ?target_timelineid); let mut totals: GcResult = Default::default(); let now = Instant::now(); From 1f0b406b633aa624f89d1632affabd03ab622171 Mon Sep 17 00:00:00 2001 From: Konstantin Knizhnik Date: Thu, 31 Mar 2022 16:28:07 +0300 Subject: [PATCH 60/83] Perform repartitioning in compaction thread refer #1441 --- pageserver/src/layered_repository.rs | 5 +++++ pageserver/src/pgdatadir_mapping.rs | 21 +++++++++++---------- pageserver/src/timelines.rs | 2 +- 3 files changed, 17 insertions(+), 11 deletions(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index f07a2639d3..a63f157552 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -41,6 +41,7 @@ use crate::repository::{ GcResult, Repository, RepositoryTimeline, Timeline, TimelineSyncStatusUpdate, TimelineWriter, }; use crate::repository::{Key, Value}; +use crate::tenant_mgr; use crate::thread_mgr; use crate::virtual_file::VirtualFile; use crate::walreceiver::IS_WAL_RECEIVER; @@ -1588,6 +1589,10 @@ impl LayeredTimeline { let target_file_size = self.conf.checkpoint_distance; + // Define partitioning schema if needed + tenant_mgr::get_timeline_for_tenant_load(self.tenantid, self.timelineid)? + .repartition(self.get_last_record_lsn())?; + // 1. The partitioning was already done by the code in // pgdatadir_mapping.rs. We just use it here. let partitioning_guard = self.partitioning.read().unwrap(); diff --git a/pageserver/src/pgdatadir_mapping.rs b/pageserver/src/pgdatadir_mapping.rs index 7b0fc606de..75ace4ecee 100644 --- a/pageserver/src/pgdatadir_mapping.rs +++ b/pageserver/src/pgdatadir_mapping.rs @@ -388,6 +388,17 @@ impl DatadirTimeline { Ok(result.to_keyspace()) } + + pub fn repartition(&self, lsn: Lsn) -> Result<()> { + let last_partitioning = self.last_partitioning.load(); + if last_partitioning == Lsn(0) || lsn.0 - last_partitioning.0 > self.repartition_threshold { + let keyspace = self.collect_keyspace(lsn)?; + let partitioning = keyspace.partition(TARGET_FILE_SIZE_BYTES); + self.tline.hint_partitioning(partitioning, lsn)?; + self.last_partitioning.store(lsn); + } + Ok(()) + } } /// DatadirModification represents an operation to ingest an atomic set of @@ -767,7 +778,6 @@ impl<'a, R: Repository> DatadirModification<'a, R> { pub fn commit(self) -> Result<()> { let writer = self.tline.tline.writer(); - let last_partitioning = self.tline.last_partitioning.load(); let pending_nblocks = self.pending_nblocks; for (key, value) in self.pending_updates { @@ -779,15 +789,6 @@ impl<'a, R: Repository> DatadirModification<'a, R> { writer.finish_write(self.lsn); - if last_partitioning == Lsn(0) - || self.lsn.0 - last_partitioning.0 > self.tline.repartition_threshold - { - let keyspace = self.tline.collect_keyspace(self.lsn)?; - let partitioning = keyspace.partition(TARGET_FILE_SIZE_BYTES); - self.tline.tline.hint_partitioning(partitioning, self.lsn)?; - self.tline.last_partitioning.store(self.lsn); - } - if pending_nblocks != 0 { self.tline.current_logical_size.fetch_add( pending_nblocks * pg_constants::BLCKSZ as isize, diff --git a/pageserver/src/timelines.rs b/pageserver/src/timelines.rs index 105c3c869f..ae713c260c 100644 --- a/pageserver/src/timelines.rs +++ b/pageserver/src/timelines.rs @@ -286,7 +286,7 @@ fn bootstrap_timeline( let timeline = repo.create_empty_timeline(tli, lsn)?; let mut page_tline: DatadirTimeline = DatadirTimeline::new(timeline, u64::MAX); import_datadir::import_timeline_from_postgres_datadir(&pgdata_path, &mut page_tline, lsn)?; - page_tline.tline.checkpoint(CheckpointConfig::Forced)?; + page_tline.tline.checkpoint(CheckpointConfig::Flush)?; println!( "created initial timeline {} timeline.lsn {}", From 92031d376af9c8d80e77ee33afdb9b7868281f9c Mon Sep 17 00:00:00 2001 From: Konstantin Knizhnik Date: Thu, 31 Mar 2022 16:44:01 +0300 Subject: [PATCH 61/83] Fix unit tests --- pageserver/src/layered_repository.rs | 6 ++++-- pageserver/src/timelines.rs | 2 +- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index a63f157552..eb4f49ddd1 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -1590,8 +1590,10 @@ impl LayeredTimeline { let target_file_size = self.conf.checkpoint_distance; // Define partitioning schema if needed - tenant_mgr::get_timeline_for_tenant_load(self.tenantid, self.timelineid)? - .repartition(self.get_last_record_lsn())?; + if let Ok(pgdir) = tenant_mgr::get_timeline_for_tenant_load(self.tenantid, self.timelineid) + { + pgdir.repartition(self.get_last_record_lsn())?; + } // 1. The partitioning was already done by the code in // pgdatadir_mapping.rs. We just use it here. diff --git a/pageserver/src/timelines.rs b/pageserver/src/timelines.rs index ae713c260c..105c3c869f 100644 --- a/pageserver/src/timelines.rs +++ b/pageserver/src/timelines.rs @@ -286,7 +286,7 @@ fn bootstrap_timeline( let timeline = repo.create_empty_timeline(tli, lsn)?; let mut page_tline: DatadirTimeline = DatadirTimeline::new(timeline, u64::MAX); import_datadir::import_timeline_from_postgres_datadir(&pgdata_path, &mut page_tline, lsn)?; - page_tline.tline.checkpoint(CheckpointConfig::Flush)?; + page_tline.tline.checkpoint(CheckpointConfig::Forced)?; println!( "created initial timeline {} timeline.lsn {}", From 232fe14297c6f12b6ad83b723ab6dcba09febc5e Mon Sep 17 00:00:00 2001 From: Konstantin Knizhnik Date: Thu, 31 Mar 2022 20:23:56 +0300 Subject: [PATCH 62/83] Refactor partitioning --- pageserver/src/layered_repository.rs | 29 +++------------------------- pageserver/src/pgdatadir_mapping.rs | 25 +++++++++++++----------- pageserver/src/repository.rs | 14 -------------- 3 files changed, 17 insertions(+), 51 deletions(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index eb4f49ddd1..5ab6097960 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -34,7 +34,7 @@ use std::time::Instant; use self::metadata::{metadata_path, TimelineMetadata, METADATA_FILE_NAME}; use crate::config::PageServerConf; -use crate::keyspace::{KeyPartitioning, KeySpace}; +use crate::keyspace::KeySpace; use crate::page_cache; use crate::remote_storage::{schedule_timeline_checkpoint_upload, RemoteIndex}; use crate::repository::{ @@ -792,8 +792,6 @@ pub struct LayeredTimeline { // garbage collecting data that is still needed by the child timelines. gc_info: RwLock, - partitioning: RwLock>, - // It may change across major versions so for simplicity // keep it after running initdb for a timeline. // It is needed in checks when we want to error on some operations @@ -943,14 +941,6 @@ impl Timeline for LayeredTimeline { self.disk_consistent_lsn.load() } - fn hint_partitioning(&self, partitioning: KeyPartitioning, lsn: Lsn) -> Result<()> { - self.partitioning - .write() - .unwrap() - .replace((partitioning, lsn)); - Ok(()) - } - fn writer<'a>(&'a self) -> Box { Box::new(LayeredTimelineWriter { tl: self, @@ -1037,7 +1027,6 @@ impl LayeredTimeline { retain_lsns: Vec::new(), cutoff: Lsn(0), }), - partitioning: RwLock::new(None), latest_gc_cutoff_lsn: RwLock::new(metadata.latest_gc_cutoff_lsn()), initdb_lsn: metadata.initdb_lsn(), @@ -1592,23 +1581,11 @@ impl LayeredTimeline { // Define partitioning schema if needed if let Ok(pgdir) = tenant_mgr::get_timeline_for_tenant_load(self.tenantid, self.timelineid) { - pgdir.repartition(self.get_last_record_lsn())?; - } - - // 1. The partitioning was already done by the code in - // pgdatadir_mapping.rs. We just use it here. - let partitioning_guard = self.partitioning.read().unwrap(); - if let Some((partitioning, lsn)) = partitioning_guard.as_ref() { + let (partitioning, lsn) = pgdir.repartition(self.get_last_record_lsn())?; let timer = self.create_images_time_histo.start_timer(); - // Make a copy of the partitioning, so that we can release - // the lock. Otherwise we could block the WAL receiver. - let lsn = *lsn; - let parts = partitioning.parts.clone(); - drop(partitioning_guard); - // 2. Create new image layers for partitions that have been modified // "enough". - for part in parts.iter() { + for part in partitioning.parts.iter() { if self.time_for_new_image_layer(part, lsn, 3)? { self.create_image_layer(part, lsn)?; } diff --git a/pageserver/src/pgdatadir_mapping.rs b/pageserver/src/pgdatadir_mapping.rs index 75ace4ecee..fbd1b56180 100644 --- a/pageserver/src/pgdatadir_mapping.rs +++ b/pageserver/src/pgdatadir_mapping.rs @@ -6,7 +6,7 @@ //! walingest.rs handles a few things like implicit relation creation and extension. //! Clarify that) //! -use crate::keyspace::{KeySpace, KeySpaceAccum, TARGET_FILE_SIZE_BYTES}; +use crate::keyspace::{KeyPartitioning, KeySpace, KeySpaceAccum, TARGET_FILE_SIZE_BYTES}; use crate::reltag::{RelTag, SlruKind}; use crate::repository::*; use crate::repository::{Repository, Timeline}; @@ -18,10 +18,9 @@ use serde::{Deserialize, Serialize}; use std::collections::{HashMap, HashSet}; use std::ops::Range; use std::sync::atomic::{AtomicIsize, Ordering}; -use std::sync::{Arc, RwLockReadGuard}; +use std::sync::{Arc, RwLock, RwLockReadGuard}; use tracing::{debug, error, trace, warn}; use zenith_utils::bin_ser::BeSer; -use zenith_utils::lsn::AtomicLsn; use zenith_utils::lsn::Lsn; /// Block number within a relation or SLRU. This matches PostgreSQL's BlockNumber type. @@ -38,7 +37,7 @@ where pub tline: Arc, /// When did we last calculate the partitioning? - last_partitioning: AtomicLsn, + partitioning: RwLock<(KeyPartitioning, Lsn)>, /// Configuration: how often should the partitioning be recalculated. repartition_threshold: u64, @@ -51,7 +50,7 @@ impl DatadirTimeline { pub fn new(tline: Arc, repartition_threshold: u64) -> Self { DatadirTimeline { tline, - last_partitioning: AtomicLsn::new(0), + partitioning: RwLock::new((KeyPartitioning::new(), Lsn(0))), current_logical_size: AtomicIsize::new(0), repartition_threshold, } @@ -389,15 +388,19 @@ impl DatadirTimeline { Ok(result.to_keyspace()) } - pub fn repartition(&self, lsn: Lsn) -> Result<()> { - let last_partitioning = self.last_partitioning.load(); - if last_partitioning == Lsn(0) || lsn.0 - last_partitioning.0 > self.repartition_threshold { + pub fn repartition(&self, lsn: Lsn) -> Result<(KeyPartitioning, Lsn)> { + let partitioning_guard = self.partitioning.read().unwrap(); + if partitioning_guard.1 == Lsn(0) + || lsn.0 - partitioning_guard.1 .0 > self.repartition_threshold + { let keyspace = self.collect_keyspace(lsn)?; + drop(partitioning_guard); + let mut partitioning_guard = self.partitioning.write().unwrap(); let partitioning = keyspace.partition(TARGET_FILE_SIZE_BYTES); - self.tline.hint_partitioning(partitioning, lsn)?; - self.last_partitioning.store(lsn); + *partitioning_guard = (partitioning, lsn); + return Ok((partitioning_guard.0.clone(), lsn)); } - Ok(()) + Ok((partitioning_guard.0.clone(), partitioning_guard.1)) } } diff --git a/pageserver/src/repository.rs b/pageserver/src/repository.rs index b960e037be..7e998b0ebe 100644 --- a/pageserver/src/repository.rs +++ b/pageserver/src/repository.rs @@ -1,4 +1,3 @@ -use crate::keyspace::KeyPartitioning; use crate::layered_repository::metadata::TimelineMetadata; use crate::remote_storage::RemoteIndex; use crate::walrecord::ZenithWalRecord; @@ -372,19 +371,6 @@ pub trait Timeline: Send + Sync { /// know anything about them here in the repository. fn checkpoint(&self, cconf: CheckpointConfig) -> Result<()>; - /// - /// Tell the implementation how the keyspace should be partitioned. - /// - /// FIXME: This is quite a hack. The code in pgdatadir_mapping.rs knows - /// which keys exist and what is the logical grouping of them. That's why - /// the code there (and in keyspace.rs) decides the partitioning, not the - /// layered_repository.rs implementation. That's a layering violation: - /// the Repository implementation ought to be responsible for the physical - /// layout, but currently it's more convenient to do it in pgdatadir_mapping.rs - /// rather than in layered_repository.rs. - /// - fn hint_partitioning(&self, partitioning: KeyPartitioning, lsn: Lsn) -> Result<()>; - /// /// Check that it is valid to request operations with that lsn. fn check_lsn_is_in_scope( From bef9b837f1171b9040dc959189796d835c1f8f9c Mon Sep 17 00:00:00 2001 From: Konstantin Knizhnik Date: Fri, 1 Apr 2022 12:09:35 +0300 Subject: [PATCH 63/83] Replace rwlock with mutex in repartition --- pageserver/src/layered_repository.rs | 12 ------------ pageserver/src/pgdatadir_mapping.rs | 10 ++++------ 2 files changed, 4 insertions(+), 18 deletions(-) diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 5ab6097960..60b0e921ce 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -2220,12 +2220,6 @@ pub mod tests { } let cutoff = tline.get_last_record_lsn(); - let parts = keyspace - .clone() - .to_keyspace() - .partition(TEST_FILE_SIZE as u64); - tline.hint_partitioning(parts.clone(), lsn)?; - tline.update_gc_info(Vec::new(), cutoff); tline.checkpoint(CheckpointConfig::Forced)?; tline.compact()?; @@ -2268,9 +2262,6 @@ pub mod tests { keyspace.add_key(test_key); } - let parts = keyspace.to_keyspace().partition(TEST_FILE_SIZE as u64); - tline.hint_partitioning(parts, lsn)?; - for _ in 0..50 { for _ in 0..NUM_KEYS { lsn = Lsn(lsn.0 + 0x10); @@ -2342,9 +2333,6 @@ pub mod tests { keyspace.add_key(test_key); } - let parts = keyspace.to_keyspace().partition(TEST_FILE_SIZE as u64); - tline.hint_partitioning(parts, lsn)?; - let mut tline_id = TIMELINE_ID; for _ in 0..50 { let new_tline_id = ZTimelineId::generate(); diff --git a/pageserver/src/pgdatadir_mapping.rs b/pageserver/src/pgdatadir_mapping.rs index fbd1b56180..2e0040f0c0 100644 --- a/pageserver/src/pgdatadir_mapping.rs +++ b/pageserver/src/pgdatadir_mapping.rs @@ -18,7 +18,7 @@ use serde::{Deserialize, Serialize}; use std::collections::{HashMap, HashSet}; use std::ops::Range; use std::sync::atomic::{AtomicIsize, Ordering}; -use std::sync::{Arc, RwLock, RwLockReadGuard}; +use std::sync::{Arc, Mutex, RwLockReadGuard}; use tracing::{debug, error, trace, warn}; use zenith_utils::bin_ser::BeSer; use zenith_utils::lsn::Lsn; @@ -37,7 +37,7 @@ where pub tline: Arc, /// When did we last calculate the partitioning? - partitioning: RwLock<(KeyPartitioning, Lsn)>, + partitioning: Mutex<(KeyPartitioning, Lsn)>, /// Configuration: how often should the partitioning be recalculated. repartition_threshold: u64, @@ -50,7 +50,7 @@ impl DatadirTimeline { pub fn new(tline: Arc, repartition_threshold: u64) -> Self { DatadirTimeline { tline, - partitioning: RwLock::new((KeyPartitioning::new(), Lsn(0))), + partitioning: Mutex::new((KeyPartitioning::new(), Lsn(0))), current_logical_size: AtomicIsize::new(0), repartition_threshold, } @@ -389,13 +389,11 @@ impl DatadirTimeline { } pub fn repartition(&self, lsn: Lsn) -> Result<(KeyPartitioning, Lsn)> { - let partitioning_guard = self.partitioning.read().unwrap(); + let mut partitioning_guard = self.partitioning.lock().unwrap(); if partitioning_guard.1 == Lsn(0) || lsn.0 - partitioning_guard.1 .0 > self.repartition_threshold { let keyspace = self.collect_keyspace(lsn)?; - drop(partitioning_guard); - let mut partitioning_guard = self.partitioning.write().unwrap(); let partitioning = keyspace.partition(TARGET_FILE_SIZE_BYTES); *partitioning_guard = (partitioning, lsn); return Ok((partitioning_guard.0.clone(), lsn)); From 572b3f48cf1fb1217efc8067fde2597f38dfa447 Mon Sep 17 00:00:00 2001 From: Konstantin Knizhnik Date: Fri, 1 Apr 2022 19:40:39 +0300 Subject: [PATCH 64/83] Add compaction_target_size parameter --- pageserver/src/config.rs | 27 +++++++++++++++++++++++++++ pageserver/src/keyspace.rs | 3 --- pageserver/src/layered_repository.rs | 3 ++- pageserver/src/pgdatadir_mapping.rs | 8 ++++---- 4 files changed, 33 insertions(+), 8 deletions(-) diff --git a/pageserver/src/config.rs b/pageserver/src/config.rs index 9f7cd34a7a..0d5cac8b4f 100644 --- a/pageserver/src/config.rs +++ b/pageserver/src/config.rs @@ -30,8 +30,13 @@ pub mod defaults { // FIXME: This current value is very low. I would imagine something like 1 GB or 10 GB // would be more appropriate. But a low value forces the code to be exercised more, // which is good for now to trigger bugs. + // This parameter actually determines L0 layer file size. pub const DEFAULT_CHECKPOINT_DISTANCE: u64 = 256 * 1024 * 1024; + // Target file size, when creating image and delta layers. + // This parameter determines L1 layer file size. + pub const DEFAULT_COMPACTION_TARGET_SIZE: u64 = 128 * 1024 * 1024; + pub const DEFAULT_COMPACTION_PERIOD: &str = "1 s"; pub const DEFAULT_GC_HORIZON: u64 = 64 * 1024 * 1024; @@ -58,6 +63,7 @@ pub mod defaults { #listen_http_addr = '{DEFAULT_HTTP_LISTEN_ADDR}' #checkpoint_distance = {DEFAULT_CHECKPOINT_DISTANCE} # in bytes +#compaction_target_size = {DEFAULT_COMPACTION_TARGET_SIZE} # in bytes #compaction_period = '{DEFAULT_COMPACTION_PERIOD}' #gc_period = '{DEFAULT_GC_PERIOD}' @@ -91,8 +97,13 @@ pub struct PageServerConf { // Flush out an inmemory layer, if it's holding WAL older than this // This puts a backstop on how much WAL needs to be re-digested if the // page server crashes. + // This parameter actually determines L0 layer file size. pub checkpoint_distance: u64, + // Target file size, when creating image and delta layers. + // This parameter determines L1 layer file size. + pub compaction_target_size: u64, + // How often to check if there's compaction work to be done. pub compaction_period: Duration, @@ -149,6 +160,7 @@ struct PageServerConfigBuilder { checkpoint_distance: BuilderValue, + compaction_target_size: BuilderValue, compaction_period: BuilderValue, gc_horizon: BuilderValue, @@ -183,6 +195,7 @@ impl Default for PageServerConfigBuilder { listen_pg_addr: Set(DEFAULT_PG_LISTEN_ADDR.to_string()), listen_http_addr: Set(DEFAULT_HTTP_LISTEN_ADDR.to_string()), checkpoint_distance: Set(DEFAULT_CHECKPOINT_DISTANCE), + compaction_target_size: Set(DEFAULT_COMPACTION_TARGET_SIZE), compaction_period: Set(humantime::parse_duration(DEFAULT_COMPACTION_PERIOD) .expect("cannot parse default compaction period")), gc_horizon: Set(DEFAULT_GC_HORIZON), @@ -220,6 +233,10 @@ impl PageServerConfigBuilder { self.checkpoint_distance = BuilderValue::Set(checkpoint_distance) } + pub fn compaction_target_size(&mut self, compaction_target_size: u64) { + self.compaction_target_size = BuilderValue::Set(compaction_target_size) + } + pub fn compaction_period(&mut self, compaction_period: Duration) { self.compaction_period = BuilderValue::Set(compaction_period) } @@ -290,6 +307,9 @@ impl PageServerConfigBuilder { checkpoint_distance: self .checkpoint_distance .ok_or(anyhow::anyhow!("missing checkpoint_distance"))?, + compaction_target_size: self + .compaction_target_size + .ok_or(anyhow::anyhow!("missing compaction_target_size"))?, compaction_period: self .compaction_period .ok_or(anyhow::anyhow!("missing compaction_period"))?, @@ -429,6 +449,9 @@ impl PageServerConf { "listen_pg_addr" => builder.listen_pg_addr(parse_toml_string(key, item)?), "listen_http_addr" => builder.listen_http_addr(parse_toml_string(key, item)?), "checkpoint_distance" => builder.checkpoint_distance(parse_toml_u64(key, item)?), + "compaction_target_size" => { + builder.compaction_target_size(parse_toml_u64(key, item)?) + } "compaction_period" => builder.compaction_period(parse_toml_duration(key, item)?), "gc_horizon" => builder.gc_horizon(parse_toml_u64(key, item)?), "gc_period" => builder.gc_period(parse_toml_duration(key, item)?), @@ -565,6 +588,7 @@ impl PageServerConf { PageServerConf { id: ZNodeId(0), checkpoint_distance: defaults::DEFAULT_CHECKPOINT_DISTANCE, + compaction_target_size: 4 * 1024 * 1024, compaction_period: Duration::from_secs(10), gc_horizon: defaults::DEFAULT_GC_HORIZON, gc_period: Duration::from_secs(10), @@ -636,6 +660,7 @@ listen_http_addr = '127.0.0.1:9898' checkpoint_distance = 111 # in bytes +compaction_target_size = 111 # in bytes compaction_period = '111 s' gc_period = '222 s' @@ -673,6 +698,7 @@ id = 10 listen_pg_addr: defaults::DEFAULT_PG_LISTEN_ADDR.to_string(), listen_http_addr: defaults::DEFAULT_HTTP_LISTEN_ADDR.to_string(), checkpoint_distance: defaults::DEFAULT_CHECKPOINT_DISTANCE, + compaction_target_size: defaults::DEFAULT_COMPACTION_TARGET_SIZE, compaction_period: humantime::parse_duration(defaults::DEFAULT_COMPACTION_PERIOD)?, gc_horizon: defaults::DEFAULT_GC_HORIZON, gc_period: humantime::parse_duration(defaults::DEFAULT_GC_PERIOD)?, @@ -717,6 +743,7 @@ id = 10 listen_pg_addr: "127.0.0.1:64000".to_string(), listen_http_addr: "127.0.0.1:9898".to_string(), checkpoint_distance: 111, + compaction_target_size: 111, compaction_period: Duration::from_secs(111), gc_horizon: 222, gc_period: Duration::from_secs(222), diff --git a/pageserver/src/keyspace.rs b/pageserver/src/keyspace.rs index 9973568b07..f6f0d7b7cf 100644 --- a/pageserver/src/keyspace.rs +++ b/pageserver/src/keyspace.rs @@ -2,9 +2,6 @@ use crate::repository::{key_range_size, singleton_range, Key}; use postgres_ffi::pg_constants; use std::ops::Range; -// Target file size, when creating image and delta layers -pub const TARGET_FILE_SIZE_BYTES: u64 = 128 * 1024 * 1024; // 128 MB - /// /// Represents a set of Keys, in a compact form. /// diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 60b0e921ce..2d9b680624 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -1581,7 +1581,8 @@ impl LayeredTimeline { // Define partitioning schema if needed if let Ok(pgdir) = tenant_mgr::get_timeline_for_tenant_load(self.tenantid, self.timelineid) { - let (partitioning, lsn) = pgdir.repartition(self.get_last_record_lsn())?; + let (partitioning, lsn) = + pgdir.repartition(self.get_last_record_lsn(), self.conf.compaction_target_size)?; let timer = self.create_images_time_histo.start_timer(); // 2. Create new image layers for partitions that have been modified // "enough". diff --git a/pageserver/src/pgdatadir_mapping.rs b/pageserver/src/pgdatadir_mapping.rs index 2e0040f0c0..af12084766 100644 --- a/pageserver/src/pgdatadir_mapping.rs +++ b/pageserver/src/pgdatadir_mapping.rs @@ -6,7 +6,7 @@ //! walingest.rs handles a few things like implicit relation creation and extension. //! Clarify that) //! -use crate::keyspace::{KeyPartitioning, KeySpace, KeySpaceAccum, TARGET_FILE_SIZE_BYTES}; +use crate::keyspace::{KeyPartitioning, KeySpace, KeySpaceAccum}; use crate::reltag::{RelTag, SlruKind}; use crate::repository::*; use crate::repository::{Repository, Timeline}; @@ -388,13 +388,13 @@ impl DatadirTimeline { Ok(result.to_keyspace()) } - pub fn repartition(&self, lsn: Lsn) -> Result<(KeyPartitioning, Lsn)> { + pub fn repartition(&self, lsn: Lsn, partition_size: u64) -> Result<(KeyPartitioning, Lsn)> { let mut partitioning_guard = self.partitioning.lock().unwrap(); if partitioning_guard.1 == Lsn(0) || lsn.0 - partitioning_guard.1 .0 > self.repartition_threshold { let keyspace = self.collect_keyspace(lsn)?; - let partitioning = keyspace.partition(TARGET_FILE_SIZE_BYTES); + let partitioning = keyspace.partition(partition_size); *partitioning_guard = (partitioning, lsn); return Ok((partitioning_guard.0.clone(), lsn)); } @@ -1215,7 +1215,7 @@ pub fn create_test_timeline( timeline_id: zenith_utils::zid::ZTimelineId, ) -> Result>> { let tline = repo.create_empty_timeline(timeline_id, Lsn(8))?; - let tline = DatadirTimeline::new(tline, crate::layered_repository::tests::TEST_FILE_SIZE / 10); + let tline = DatadirTimeline::new(tline, tline.conf.compaction_target_size / 10); let mut m = tline.begin_modification(Lsn(8)); m.init_empty()?; m.commit()?; From fcf613b6e3e5d4fefa1d53daeb677ccf7c64b5f8 Mon Sep 17 00:00:00 2001 From: Konstantin Knizhnik Date: Fri, 1 Apr 2022 19:57:51 +0300 Subject: [PATCH 65/83] Fix unit tests build --- pageserver/src/pgdatadir_mapping.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pageserver/src/pgdatadir_mapping.rs b/pageserver/src/pgdatadir_mapping.rs index af12084766..0b9ea7c7a7 100644 --- a/pageserver/src/pgdatadir_mapping.rs +++ b/pageserver/src/pgdatadir_mapping.rs @@ -1215,7 +1215,7 @@ pub fn create_test_timeline( timeline_id: zenith_utils::zid::ZTimelineId, ) -> Result>> { let tline = repo.create_empty_timeline(timeline_id, Lsn(8))?; - let tline = DatadirTimeline::new(tline, tline.conf.compaction_target_size / 10); + let tline = DatadirTimeline::new(tline, 256 * 1024); let mut m = tline.begin_modification(Lsn(8)); m.init_empty()?; m.commit()?; From a5a478c32193fcf6e04b3e9b2fa981d2bc5e82e2 Mon Sep 17 00:00:00 2001 From: Arthur Petukhovsky Date: Mon, 4 Apr 2022 16:32:30 +0300 Subject: [PATCH 66/83] Bump vendor/postgres to store WAL on disk only (#1342) Now WAL is no longer held in compute memory --- vendor/postgres | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/vendor/postgres b/vendor/postgres index 5c278ed0ac..8481459996 160000 --- a/vendor/postgres +++ b/vendor/postgres @@ -1 +1 @@ -Subproject commit 5c278ed0aca5dea9340d9af4ad5f004d905ff1b7 +Subproject commit 848145999653be213141a330569b6f2d9f53dbf2 From 089ba6abfe6c6e291489970b1c82dc5d3d6c0516 Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Mon, 4 Apr 2022 20:12:25 +0300 Subject: [PATCH 67/83] Clean up some comments that still referred to 'segments' --- .../src/layered_repository/delta_layer.rs | 13 +++++------- .../src/layered_repository/image_layer.rs | 4 ++-- .../src/layered_repository/layer_map.rs | 20 ++----------------- .../src/layered_repository/storage_layer.rs | 4 ++-- 4 files changed, 11 insertions(+), 30 deletions(-) diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs index 0e59eb7a3c..955d4145f3 100644 --- a/pageserver/src/layered_repository/delta_layer.rs +++ b/pageserver/src/layered_repository/delta_layer.rs @@ -1,14 +1,11 @@ //! A DeltaLayer represents a collection of WAL records or page images in a range of //! LSNs, and in a range of Keys. It is stored on a file on disk. //! -//! Usually a delta layer only contains differences - in the form of WAL records against -//! a base LSN. However, if a segment is newly created, by creating a new relation or -//! extending an old one, there might be no base image. In that case, all the entries in -//! the delta layer must be page images or WAL records with the 'will_init' flag set, so -//! that they can be replayed without referring to an older page version. Also in some -//! circumstances, the predecessor layer might actually be another delta layer. That -//! can happen when you create a new branch in the middle of a delta layer, and the WAL -//! records on the new branch are put in a new delta layer. +//! Usually a delta layer only contains differences, in the form of WAL records +//! against a base LSN. However, if a relation extended or a whole new relation +//! is created, there would be no base for the new pages. The entries for them +//! must be page images or WAL records with the 'will_init' flag set, so that +//! they can be replayed without referring to an older page version. //! //! When a delta file needs to be accessed, we slurp the 'index' metadata //! into memory, into the DeltaLayerInner struct. See load() and unload() functions. diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs index 2b9bf4a717..68d1cd4a8a 100644 --- a/pageserver/src/layered_repository/image_layer.rs +++ b/pageserver/src/layered_repository/image_layer.rs @@ -405,8 +405,8 @@ impl ImageLayer { /// /// 1. Create the ImageLayerWriter by calling ImageLayerWriter::new(...) /// -/// 2. Write the contents by calling `put_page_image` for every page -/// in the segment. +/// 2. Write the contents by calling `put_page_image` for every key-value +/// pair in the key range. /// /// 3. Call `finish`. /// diff --git a/pageserver/src/layered_repository/layer_map.rs b/pageserver/src/layered_repository/layer_map.rs index b6a3bd82aa..8132ec9cc4 100644 --- a/pageserver/src/layered_repository/layer_map.rs +++ b/pageserver/src/layered_repository/layer_map.rs @@ -207,11 +207,11 @@ impl LayerMap { NUM_ONDISK_LAYERS.dec(); } - /// Is there a newer image layer for given segment? + /// Is there a newer image layer for given key-range? /// /// This is used for garbage collection, to determine if an old layer can /// be deleted. - /// We ignore segments newer than disk_consistent_lsn because they will be removed at restart + /// We ignore layers newer than disk_consistent_lsn because they will be removed at restart /// We also only look at historic layers //#[allow(dead_code)] pub fn newer_image_layer_exists( @@ -250,22 +250,6 @@ impl LayerMap { } } - /// Is there any layer for given segment that is alive at the lsn? - /// - /// This is a public wrapper for SegEntry fucntion, - /// used for garbage collection, to determine if some alive layer - /// exists at the lsn. If so, we shouldn't delete a newer dropped layer - /// to avoid incorrectly making it visible. - /* - pub fn layer_exists_at_lsn(&self, seg: SegmentTag, lsn: Lsn) -> Result { - Ok(if let Some(segentry) = self.historic_layers.get(&seg) { - segentry.exists_at_lsn(seg, lsn)?.unwrap_or(false) - } else { - false - }) - } - */ - pub fn iter_historic_layers(&self) -> std::slice::Iter> { self.historic_layers.iter() } diff --git a/pageserver/src/layered_repository/storage_layer.rs b/pageserver/src/layered_repository/storage_layer.rs index dcf5b63908..2711640736 100644 --- a/pageserver/src/layered_repository/storage_layer.rs +++ b/pageserver/src/layered_repository/storage_layer.rs @@ -88,7 +88,7 @@ pub trait Layer: Send + Sync { /// Identify the timeline this layer belongs to fn get_timeline_id(&self) -> ZTimelineId; - /// Range of segments that this layer covers + /// Range of keys that this layer covers fn get_key_range(&self) -> Range; /// Inclusive start bound of the LSN range that this layer holds @@ -123,7 +123,7 @@ pub trait Layer: Send + Sync { reconstruct_data: &mut ValueReconstructState, ) -> Result; - /// Does this layer only contain some data for the segment (incremental), + /// Does this layer only contain some data for the key-range (incremental), /// or does it contain a version of every page? This is important to know /// for garbage collecting old layers: an incremental layer depends on /// the previous non-incremental layer. From 222b7233540d93327d26cb0566b1c30379451656 Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Mon, 4 Apr 2022 20:12:28 +0300 Subject: [PATCH 68/83] Handle read errors when dumping a delta layer file. If a file is corrupt, let's not stop on first read error, but continue dumping. --- .../src/layered_repository/delta_layer.rs | 38 +++++++++++-------- 1 file changed, 22 insertions(+), 16 deletions(-) diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs index 955d4145f3..7013c2417c 100644 --- a/pageserver/src/layered_repository/delta_layer.rs +++ b/pageserver/src/layered_repository/delta_layer.rs @@ -293,25 +293,31 @@ impl Layer for DeltaLayer { for (lsn, blob_ref) in versions.as_slice() { let mut desc = String::new(); let mut buf = vec![0u8; blob_ref.size()]; - chapter.read_exact_at(&mut buf, blob_ref.pos())?; - let val = Value::des(&buf); + match chapter.read_exact_at(&mut buf, blob_ref.pos()) { + Ok(()) => { + let val = Value::des(&buf); - match val { - Ok(Value::Image(img)) => { - write!(&mut desc, " img {} bytes", img.len())?; - } - Ok(Value::WalRecord(rec)) => { - let wal_desc = walrecord::describe_wal_record(&rec); - write!( - &mut desc, - " rec {} bytes will_init: {} {}", - buf.len(), - rec.will_init(), - wal_desc - )?; + match val { + Ok(Value::Image(img)) => { + write!(&mut desc, " img {} bytes", img.len())?; + } + Ok(Value::WalRecord(rec)) => { + let wal_desc = walrecord::describe_wal_record(&rec); + write!( + &mut desc, + " rec {} bytes will_init: {} {}", + buf.len(), + rec.will_init(), + wal_desc + )?; + } + Err(err) => { + write!(&mut desc, " DESERIALIZATION ERROR: {}", err)?; + } + } } Err(err) => { - write!(&mut desc, " DESERIALIZATION ERROR: {}", err)?; + write!(&mut desc, " READ ERROR: {}", err)?; } } println!(" key {} at {}: {}", key, lsn, desc); From 2f784144fe335e30811dca0f86c7ff20ec2978dc Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Mon, 4 Apr 2022 20:12:31 +0300 Subject: [PATCH 69/83] Avoid deadlock when locking two buffers. It happened in unit tests. If a thread tries to read a buffer while already holding a lock on one buffer, the code to find a victim buffer to evict could try to evict the buffer that's already locked. To fix, skip locked buffers. --- pageserver/src/page_cache.rs | 29 ++++++++++++++++++++++------- 1 file changed, 22 insertions(+), 7 deletions(-) diff --git a/pageserver/src/page_cache.rs b/pageserver/src/page_cache.rs index 299575f792..c485e46f47 100644 --- a/pageserver/src/page_cache.rs +++ b/pageserver/src/page_cache.rs @@ -41,7 +41,7 @@ use std::{ convert::TryInto, sync::{ atomic::{AtomicU8, AtomicUsize, Ordering}, - RwLock, RwLockReadGuard, RwLockWriteGuard, + RwLock, RwLockReadGuard, RwLockWriteGuard, TryLockError, }, }; @@ -683,16 +683,33 @@ impl PageCache { /// /// On return, the slot is empty and write-locked. fn find_victim(&self) -> (usize, RwLockWriteGuard) { - let iter_limit = self.slots.len() * 2; + let iter_limit = self.slots.len() * 10; let mut iters = 0; loop { + iters += 1; let slot_idx = self.next_evict_slot.fetch_add(1, Ordering::Relaxed) % self.slots.len(); let slot = &self.slots[slot_idx]; - if slot.dec_usage_count() == 0 || iters >= iter_limit { - let mut inner = slot.inner.write().unwrap(); - + if slot.dec_usage_count() == 0 { + let mut inner = match slot.inner.try_write() { + Ok(inner) => inner, + Err(TryLockError::Poisoned(err)) => { + panic!("buffer lock was poisoned: {:?}", err) + } + Err(TryLockError::WouldBlock) => { + // If we have looped through the whole buffer pool 10 times + // and still haven't found a victim buffer, something's wrong. + // Maybe all the buffers were in locked. That could happen in + // theory, if you have more threads holding buffers locked than + // there are buffers in the pool. In practice, with a reasonably + // large buffer pool it really shouldn't happen. + if iters > iter_limit { + panic!("could not find a victim buffer to evict"); + } + continue; + } + }; if let Some(old_key) = &inner.key { if inner.dirty { if let Err(err) = Self::writeback(old_key, inner.buf) { @@ -717,8 +734,6 @@ impl PageCache { } return (slot_idx, inner); } - - iters += 1; } } From d0c246ac3c0101fba6c8607dbb11444d8a0f589c Mon Sep 17 00:00:00 2001 From: Alexey Kondratov Date: Tue, 5 Apr 2022 20:01:57 +0300 Subject: [PATCH 70/83] Update pageserver OpenAPI spec with missing attach/detach methods (#1463) We have these methods for some time in the API, so mentioning them in the spec could be useful for console (see zenithdb/console#867), as we generate pageserver HTTP API golang client there. --- pageserver/src/http/openapi_spec.yml | 121 +++++++++++++++++++++++++-- pageserver/src/http/routes.rs | 5 +- zenith_utils/src/http/error.rs | 6 ++ 3 files changed, 125 insertions(+), 7 deletions(-) diff --git a/pageserver/src/http/openapi_spec.yml b/pageserver/src/http/openapi_spec.yml index a9101d4bd6..b2760efe85 100644 --- a/pageserver/src/http/openapi_spec.yml +++ b/pageserver/src/http/openapi_spec.yml @@ -18,7 +18,7 @@ paths: schema: type: object required: - - id + - id properties: id: type: integer @@ -122,6 +122,110 @@ paths: application/json: schema: $ref: "#/components/schemas/Error" + + + /v1/tenant/{tenant_id}/timeline/{timeline_id}/attach: + parameters: + - name: tenant_id + in: path + required: true + schema: + type: string + format: hex + - name: timeline_id + in: path + required: true + schema: + type: string + format: hex + post: + description: Attach remote timeline + responses: + "200": + description: Timeline attaching scheduled + "400": + description: Error when no tenant id found in path or no timeline id + content: + application/json: + schema: + $ref: "#/components/schemas/Error" + "401": + description: Unauthorized Error + content: + application/json: + schema: + $ref: "#/components/schemas/UnauthorizedError" + "403": + description: Forbidden Error + content: + application/json: + schema: + $ref: "#/components/schemas/ForbiddenError" + "404": + description: Timeline not found + content: + application/json: + schema: + $ref: "#/components/schemas/NotFoundError" + "409": + description: Timeline download is already in progress + content: + application/json: + schema: + $ref: "#/components/schemas/ConflictError" + "500": + description: Generic operation error + content: + application/json: + schema: + $ref: "#/components/schemas/Error" + + + /v1/tenant/{tenant_id}/timeline/{timeline_id}/detach: + parameters: + - name: tenant_id + in: path + required: true + schema: + type: string + format: hex + - name: timeline_id + in: path + required: true + schema: + type: string + format: hex + post: + description: Detach local timeline + responses: + "200": + description: Timeline detached + "400": + description: Error when no tenant id found in path or no timeline id + content: + application/json: + schema: + $ref: "#/components/schemas/Error" + "401": + description: Unauthorized Error + content: + application/json: + schema: + $ref: "#/components/schemas/UnauthorizedError" + "403": + description: Forbidden Error + content: + application/json: + schema: + $ref: "#/components/schemas/ForbiddenError" + "500": + description: Generic operation error + content: + application/json: + schema: + $ref: "#/components/schemas/Error" + + /v1/tenant/{tenant_id}/timeline/: parameters: - name: tenant_id @@ -179,7 +283,7 @@ paths: content: application/json: schema: - $ref: "#/components/schemas/AlreadyExistsError" + $ref: "#/components/schemas/ConflictError" "500": description: Generic operation error content: @@ -260,7 +364,7 @@ paths: content: application/json: schema: - $ref: "#/components/schemas/AlreadyExistsError" + $ref: "#/components/schemas/ConflictError" "500": description: Generic operation error content: @@ -354,14 +458,21 @@ components: properties: msg: type: string - AlreadyExistsError: + ForbiddenError: type: object required: - msg properties: msg: type: string - ForbiddenError: + NotFoundError: + type: object + required: + - msg + properties: + msg: + type: string + ConflictError: type: object required: - msg diff --git a/pageserver/src/http/routes.rs b/pageserver/src/http/routes.rs index 82e818a47b..207d2420bd 100644 --- a/pageserver/src/http/routes.rs +++ b/pageserver/src/http/routes.rs @@ -220,6 +220,7 @@ async fn timeline_attach_handler(request: Request) -> Result) -> Result { HttpErrorBody::response_from_msg_and_status(self.to_string(), StatusCode::NOT_FOUND) } + ApiError::Conflict(_) => { + HttpErrorBody::response_from_msg_and_status(self.to_string(), StatusCode::CONFLICT) + } ApiError::InternalServerError(err) => HttpErrorBody::response_from_msg_and_status( err.to_string(), StatusCode::INTERNAL_SERVER_ERROR, From 6fe443e239531ca1fef4dbf5258c892b1baac6ef Mon Sep 17 00:00:00 2001 From: bojanserafimov Date: Wed, 6 Apr 2022 18:32:10 -0400 Subject: [PATCH 71/83] Improve random_writes test (#1469) If you want to test with a 3GB database by tweaking some constants you'll hit a query timeout. I fix that by batching the inserts. --- test_runner/performance/test_random_writes.py | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/test_runner/performance/test_random_writes.py b/test_runner/performance/test_random_writes.py index b41f2f72a8..ba9eabcd97 100644 --- a/test_runner/performance/test_random_writes.py +++ b/test_runner/performance/test_random_writes.py @@ -49,7 +49,15 @@ def test_random_writes(zenith_with_baseline: PgCompare): count integer default 0 ); """) - cur.execute(f"INSERT INTO Big (pk) values (generate_series(1,{n_rows}))") + + # Insert n_rows in batches to avoid query timeouts + rows_inserted = 0 + while rows_inserted < n_rows: + rows_to_insert = min(1000 * 1000, n_rows - rows_inserted) + low = rows_inserted + 1 + high = rows_inserted + rows_to_insert + cur.execute(f"INSERT INTO Big (pk) values (generate_series({low},{high}))") + rows_inserted += rows_to_insert # Get table size (can't be predicted because padding and alignment) cur.execute("SELECT pg_relation_size('Big');") From 6bc78a0e7729c206d8c4ebfdaed539017130d253 Mon Sep 17 00:00:00 2001 From: Arthur Petukhovsky Date: Thu, 7 Apr 2022 01:44:26 +0300 Subject: [PATCH 72/83] Log more info in test_many_timelines asserts (#1473) It will help to debug #1470 as soon as it happens again --- test_runner/batch_others/test_wal_acceptor.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/test_runner/batch_others/test_wal_acceptor.py b/test_runner/batch_others/test_wal_acceptor.py index bdc526a125..8f87ff041f 100644 --- a/test_runner/batch_others/test_wal_acceptor.py +++ b/test_runner/batch_others/test_wal_acceptor.py @@ -108,14 +108,14 @@ def test_many_timelines(zenith_env_builder: ZenithEnvBuilder): for flush_lsn, commit_lsn in zip(m.flush_lsns, m.commit_lsns): # Invariant. May be < when transaction is in progress. - assert commit_lsn <= flush_lsn + assert commit_lsn <= flush_lsn, f"timeline_id={timeline_id}, timeline_detail={timeline_detail}, sk_metrics={sk_metrics}" # We only call collect_metrics() after a transaction is confirmed by # the compute node, which only happens after a consensus of safekeepers # has confirmed the transaction. We assume majority consensus here. assert (2 * sum(m.last_record_lsn <= lsn - for lsn in m.flush_lsns) > zenith_env_builder.num_safekeepers) + for lsn in m.flush_lsns) > zenith_env_builder.num_safekeepers), f"timeline_id={timeline_id}, timeline_detail={timeline_detail}, sk_metrics={sk_metrics}" assert (2 * sum(m.last_record_lsn <= lsn - for lsn in m.commit_lsns) > zenith_env_builder.num_safekeepers) + for lsn in m.commit_lsns) > zenith_env_builder.num_safekeepers), f"timeline_id={timeline_id}, timeline_detail={timeline_detail}, sk_metrics={sk_metrics}" timeline_metrics.append(m) log.info(f"{message}: {timeline_metrics}") return timeline_metrics From d5258cdc4df4f5130bb9ceea5dc47128bac6ce48 Mon Sep 17 00:00:00 2001 From: bojanserafimov Date: Wed, 6 Apr 2022 20:05:24 -0400 Subject: [PATCH 73/83] [proxy] Don't print passwords (#1298) --- proxy/src/compute.rs | 12 +++++++++++- proxy/src/mgmt.rs | 2 +- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/proxy/src/compute.rs b/proxy/src/compute.rs index 7c0ab965a0..3c0eee29bc 100644 --- a/proxy/src/compute.rs +++ b/proxy/src/compute.rs @@ -24,7 +24,7 @@ pub enum ConnectionError { impl UserFacingError for ConnectionError {} /// Compute node connection params. -#[derive(Serialize, Deserialize, Debug, Default)] +#[derive(Serialize, Deserialize, Default)] pub struct DatabaseInfo { pub host: String, pub port: u16, @@ -33,6 +33,16 @@ pub struct DatabaseInfo { pub password: Option, } +// Manually implement debug to omit personal and sensitive info +impl std::fmt::Debug for DatabaseInfo { + fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result { + fmt.debug_struct("DatabaseInfo") + .field("host", &self.host) + .field("port", &self.port) + .finish() + } +} + /// PostgreSQL version as [`String`]. pub type Version = String; diff --git a/proxy/src/mgmt.rs b/proxy/src/mgmt.rs index e53542dfd2..ab6fdff040 100644 --- a/proxy/src/mgmt.rs +++ b/proxy/src/mgmt.rs @@ -107,7 +107,7 @@ impl postgres_backend::Handler for MgmtHandler { } fn try_process_query(pgb: &mut PostgresBackend, query_string: &str) -> anyhow::Result<()> { - println!("Got mgmt query: '{}'", query_string); + println!("Got mgmt query [redacted]"); // Content contains password, don't print it let resp: PsqlSessionResponse = serde_json::from_str(query_string)?; From 81ba23094e8578ed11cb1aae48cf10b79dc2f3cd Mon Sep 17 00:00:00 2001 From: Arthur Petukhovsky Date: Thu, 7 Apr 2022 20:38:26 +0300 Subject: [PATCH 74/83] Fix scripts to deploy sk4 on staging (#1476) Adjust ansible scripts and inventory for sk4 on staging --- .circleci/ansible/deploy.yaml | 24 ++++++++++++++++ .circleci/ansible/scripts/init_safekeeper.sh | 30 ++++++++++++++++++++ .circleci/ansible/staging.hosts | 1 + 3 files changed, 55 insertions(+) create mode 100644 .circleci/ansible/scripts/init_safekeeper.sh diff --git a/.circleci/ansible/deploy.yaml b/.circleci/ansible/deploy.yaml index b7ffd075a0..2112102aa7 100644 --- a/.circleci/ansible/deploy.yaml +++ b/.circleci/ansible/deploy.yaml @@ -116,6 +116,30 @@ tasks: + - name: upload init script + when: console_mgmt_base_url is defined + ansible.builtin.template: + src: scripts/init_safekeeper.sh + dest: /tmp/init_safekeeper.sh + owner: root + group: root + mode: '0755' + become: true + tags: + - safekeeper + + - name: init safekeeper + shell: + cmd: /tmp/init_safekeeper.sh + args: + creates: "/storage/safekeeper/data/safekeeper.id" + environment: + ZENITH_REPO_DIR: "/storage/safekeeper/data" + LD_LIBRARY_PATH: "/usr/local/lib" + become: true + tags: + - safekeeper + # in the future safekeepers should discover pageservers byself # but currently use first pageserver that was discovered - name: set first pageserver var for safekeepers diff --git a/.circleci/ansible/scripts/init_safekeeper.sh b/.circleci/ansible/scripts/init_safekeeper.sh new file mode 100644 index 0000000000..2297788f59 --- /dev/null +++ b/.circleci/ansible/scripts/init_safekeeper.sh @@ -0,0 +1,30 @@ +#!/bin/sh + +# get instance id from meta-data service +INSTANCE_ID=$(curl -s http://169.254.169.254/latest/meta-data/instance-id) + +# store fqdn hostname in var +HOST=$(hostname -f) + + +cat < Date: Thu, 7 Apr 2022 20:50:08 +0300 Subject: [PATCH 75/83] Refactor the I/O functions. This introduces two new abstraction layers for I/O: - Block I/O, and - Blob I/O. The BlockReader trait abstracts a file or something else that can be read in 8kB pages. It is implemented by EphemeralFiles, and by a new FileBlockReader struct that allows reading arbitrary VirtualFiles in that manner, utilizing the page cache. There is also a new BlockCursor struct that works as a cursor over a BlockReader. When you create a BlockCursor and read the first page using it, it keeps the reference to the page. If you access the same page again, it avoids going to page cache and quickly returns the same page again. That can save a lot of lookups in the page cache if you perform multiple reads. The Blob-oriented API allows reading and writing "blobs" of arbitrary length. It is a layer on top of the block-oriented API. When you write a blob with the write_blob() function, it writes a length field followed by the actual data to the underlying block storage, and returns the offset where the blob was stored. The blob can be retrieved later using the offset. Finally, this replaces the I/O code in image-, delta-, and in-memory layers to use the new abstractions. These replace the 'bookfile' crate. This is a backwards-incompatible change to the storage format. --- Cargo.lock | 36 --- pageserver/Cargo.toml | 1 - pageserver/src/bin/dump_layerfile.rs | 2 + pageserver/src/layered_repository.rs | 23 +- pageserver/src/layered_repository/blob_io.rs | 122 ++++++++ pageserver/src/layered_repository/block_io.rs | 176 ++++++++++++ .../src/layered_repository/delta_layer.rs | 272 ++++++++---------- .../src/layered_repository/ephemeral_file.rs | 183 ++++++++---- .../src/layered_repository/image_layer.rs | 195 ++++++------- .../src/layered_repository/inmemory_layer.rs | 61 ++-- .../src/layered_repository/storage_layer.rs | 17 +- pageserver/src/lib.rs | 6 +- pageserver/src/page_cache.rs | 82 +++++- pageserver/src/virtual_file.rs | 3 +- 14 files changed, 774 insertions(+), 405 deletions(-) create mode 100644 pageserver/src/layered_repository/blob_io.rs create mode 100644 pageserver/src/layered_repository/block_io.rs diff --git a/Cargo.lock b/Cargo.lock index bb27df7012..e0b6288f63 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -141,30 +141,6 @@ version = "1.1.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa" -[[package]] -name = "aversion" -version = "0.2.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "41992ab8cfcc3026ef9abceffe0c2b0479c043183fc23825e30d22baab6df334" -dependencies = [ - "aversion-macros", - "byteorder", - "serde", - "serde_cbor", - "thiserror", -] - -[[package]] -name = "aversion-macros" -version = "0.2.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5ba5785f953985aa0caca927ba4005880f3b4f53de87f134e810ae3549f744d2" -dependencies = [ - "proc-macro2", - "quote", - "syn", -] - [[package]] name = "aws-creds" version = "0.27.1" @@ -264,17 +240,6 @@ dependencies = [ "generic-array", ] -[[package]] -name = "bookfile" -version = "0.3.0" -source = "git+https://github.com/zenithdb/bookfile.git?rev=bf6e43825dfb6e749ae9b80e8372c8fea76cec2f#bf6e43825dfb6e749ae9b80e8372c8fea76cec2f" -dependencies = [ - "aversion", - "byteorder", - "serde", - "thiserror", -] - [[package]] name = "boxfnonce" version = "0.1.1" @@ -1524,7 +1489,6 @@ dependencies = [ "anyhow", "async-compression", "async-trait", - "bookfile", "byteorder", "bytes", "chrono", diff --git a/pageserver/Cargo.toml b/pageserver/Cargo.toml index 6a77af1691..a5283cb331 100644 --- a/pageserver/Cargo.toml +++ b/pageserver/Cargo.toml @@ -4,7 +4,6 @@ version = "0.1.0" edition = "2021" [dependencies] -bookfile = { git = "https://github.com/zenithdb/bookfile.git", rev="bf6e43825dfb6e749ae9b80e8372c8fea76cec2f" } chrono = "0.4.19" rand = "0.8.3" regex = "1.4.5" diff --git a/pageserver/src/bin/dump_layerfile.rs b/pageserver/src/bin/dump_layerfile.rs index 27d41d50d9..7cf39566ac 100644 --- a/pageserver/src/bin/dump_layerfile.rs +++ b/pageserver/src/bin/dump_layerfile.rs @@ -4,6 +4,7 @@ use anyhow::Result; use clap::{App, Arg}; use pageserver::layered_repository::dump_layerfile_from_path; +use pageserver::page_cache; use pageserver::virtual_file; use std::path::PathBuf; use zenith_utils::GIT_VERSION; @@ -24,6 +25,7 @@ fn main() -> Result<()> { // Basic initialization of things that don't change after startup virtual_file::init(10); + page_cache::init(100); dump_layerfile_from_path(&path, true)?; diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 2d9b680624..5adf4a89ff 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -12,7 +12,6 @@ //! use anyhow::{anyhow, bail, ensure, Context, Result}; -use bookfile::Book; use bytes::Bytes; use fail::fail_point; use itertools::Itertools; @@ -56,6 +55,8 @@ use zenith_utils::crashsafe_dir; use zenith_utils::lsn::{AtomicLsn, Lsn, RecordLsn}; use zenith_utils::seqwait::SeqWait; +mod blob_io; +pub mod block_io; mod delta_layer; pub(crate) mod ephemeral_file; mod filename; @@ -2054,16 +2055,17 @@ impl<'a> TimelineWriter<'_> for LayeredTimelineWriter<'a> { /// Dump contents of a layer file to stdout. pub fn dump_layerfile_from_path(path: &Path, verbose: bool) -> Result<()> { - let file = File::open(path)?; - let book = Book::new(file)?; + use std::os::unix::fs::FileExt; - match book.magic() { - crate::DELTA_FILE_MAGIC => { - DeltaLayer::new_for_path(path, &book)?.dump(verbose)?; - } - crate::IMAGE_FILE_MAGIC => { - ImageLayer::new_for_path(path, &book)?.dump(verbose)?; - } + // All layer files start with a two-byte "magic" value, to identify the kind of + // file. + let file = File::open(path)?; + let mut header_buf = [0u8; 2]; + file.read_exact_at(&mut header_buf, 0)?; + + match u16::from_be_bytes(header_buf) { + crate::IMAGE_FILE_MAGIC => ImageLayer::new_for_path(path, file)?.dump(verbose)?, + crate::DELTA_FILE_MAGIC => DeltaLayer::new_for_path(path, file)?.dump(verbose)?, magic => bail!("unrecognized magic identifier: {:?}", magic), } @@ -2274,7 +2276,6 @@ pub mod tests { lsn, Value::Image(TEST_IMG(&format!("{} at {}", blknum, lsn))), )?; - println!("updating {} at {}", blknum, lsn); writer.finish_write(lsn); drop(writer); updated[blknum] = lsn; diff --git a/pageserver/src/layered_repository/blob_io.rs b/pageserver/src/layered_repository/blob_io.rs new file mode 100644 index 0000000000..10bfea934d --- /dev/null +++ b/pageserver/src/layered_repository/blob_io.rs @@ -0,0 +1,122 @@ +//! +//! Functions for reading and writing variable-sized "blobs". +//! +//! Each blob begins with a 4-byte length, followed by the actual data. +//! +use crate::layered_repository::block_io::{BlockCursor, BlockReader}; +use crate::page_cache::PAGE_SZ; +use std::cmp::min; +use std::io::Error; + +/// For reading +pub trait BlobCursor { + fn read_blob(&mut self, offset: u64) -> Result, std::io::Error> { + let mut buf = Vec::new(); + self.read_blob_into_buf(offset, &mut buf)?; + Ok(buf) + } + + fn read_blob_into_buf( + &mut self, + offset: u64, + dstbuf: &mut Vec, + ) -> Result<(), std::io::Error>; +} + +impl<'a, R> BlobCursor for BlockCursor +where + R: BlockReader, +{ + fn read_blob_into_buf( + &mut self, + offset: u64, + dstbuf: &mut Vec, + ) -> Result<(), std::io::Error> { + let mut blknum = (offset / PAGE_SZ as u64) as u32; + let mut off = (offset % PAGE_SZ as u64) as usize; + + let mut buf = self.read_blk(blknum)?; + + // read length + let mut len_buf = [0u8; 4]; + let thislen = PAGE_SZ - off; + if thislen < 4 { + // it is split across two pages + len_buf[..thislen].copy_from_slice(&buf[off..PAGE_SZ]); + blknum += 1; + buf = self.read_blk(blknum)?; + len_buf[thislen..].copy_from_slice(&buf[0..4 - thislen]); + off = 4 - thislen; + } else { + len_buf.copy_from_slice(&buf[off..off + 4]); + off += 4; + } + let len = u32::from_ne_bytes(len_buf) as usize; + + dstbuf.clear(); + + // Read the payload + let mut remain = len; + while remain > 0 { + let mut page_remain = PAGE_SZ - off; + if page_remain == 0 { + // continue on next page + blknum += 1; + buf = self.read_blk(blknum)?; + off = 0; + page_remain = PAGE_SZ; + } + let this_blk_len = min(remain, page_remain); + dstbuf.extend_from_slice(&buf[off..off + this_blk_len]); + remain -= this_blk_len; + off += this_blk_len; + } + Ok(()) + } +} + +pub trait BlobWriter { + fn write_blob(&mut self, srcbuf: &[u8]) -> Result; +} + +pub struct WriteBlobWriter +where + W: std::io::Write, +{ + inner: W, + offset: u64, +} + +impl WriteBlobWriter +where + W: std::io::Write, +{ + pub fn new(inner: W, start_offset: u64) -> Self { + WriteBlobWriter { + inner, + offset: start_offset, + } + } + + pub fn size(&self) -> u64 { + self.offset + } + + pub fn into_inner(self) -> W { + self.inner + } +} + +impl BlobWriter for WriteBlobWriter +where + W: std::io::Write, +{ + fn write_blob(&mut self, srcbuf: &[u8]) -> Result { + let offset = self.offset; + self.inner + .write_all(&((srcbuf.len()) as u32).to_ne_bytes())?; + self.inner.write_all(srcbuf)?; + self.offset += 4 + srcbuf.len() as u64; + Ok(offset) + } +} diff --git a/pageserver/src/layered_repository/block_io.rs b/pageserver/src/layered_repository/block_io.rs new file mode 100644 index 0000000000..2b8e31e1ee --- /dev/null +++ b/pageserver/src/layered_repository/block_io.rs @@ -0,0 +1,176 @@ +//! +//! Low-level Block-oriented I/O functions +//! +//! +//! + +use crate::page_cache; +use crate::page_cache::{ReadBufResult, PAGE_SZ}; +use lazy_static::lazy_static; +use std::ops::{Deref, DerefMut}; +use std::os::unix::fs::FileExt; +use std::sync::atomic::AtomicU64; + +/// This is implemented by anything that can read 8 kB (PAGE_SZ) +/// blocks, using the page cache +/// +/// There are currently two implementations: EphemeralFile, and FileBlockReader +/// below. +pub trait BlockReader { + type BlockLease: Deref + 'static; + + /// + /// Read a block. Returns a "lease" object that can be used to + /// access to the contents of the page. (For the page cache, the + /// lease object represents a lock on the buffer.) + /// + fn read_blk(&self, blknum: u32) -> Result; + + /// + /// Create a new "cursor" for reading from this reader. + /// + /// A cursor caches the last accessed page, allowing for faster + /// access if the same block is accessed repeatedly. + fn block_cursor(&self) -> BlockCursor<&Self> + where + Self: Sized, + { + BlockCursor::new(self) + } +} + +impl BlockReader for &B +where + B: BlockReader, +{ + type BlockLease = B::BlockLease; + + fn read_blk(&self, blknum: u32) -> Result { + (*self).read_blk(blknum) + } +} + +/// +/// A "cursor" for efficiently reading multiple pages from a BlockReader +/// +/// A cursor caches the last accessed page, allowing for faster access if the +/// same block is accessed repeatedly. +/// +/// You can access the last page with `*cursor`. 'read_blk' returns 'self', so +/// that in many cases you can use a BlockCursor as a drop-in replacement for +/// the underlying BlockReader. For example: +/// +/// ```no_run +/// # use pageserver::layered_repository::block_io::{BlockReader, FileBlockReader}; +/// # let reader: FileBlockReader = todo!(); +/// let cursor = reader.block_cursor(); +/// let buf = cursor.read_blk(1); +/// // do stuff with 'buf' +/// let buf = cursor.read_blk(2); +/// // do stuff with 'buf' +/// ``` +/// +pub struct BlockCursor +where + R: BlockReader, +{ + reader: R, + /// last accessed page + cache: Option<(u32, R::BlockLease)>, +} + +impl BlockCursor +where + R: BlockReader, +{ + pub fn new(reader: R) -> Self { + BlockCursor { + reader, + cache: None, + } + } + + pub fn read_blk(&mut self, blknum: u32) -> Result<&Self, std::io::Error> { + // Fast return if this is the same block as before + if let Some((cached_blk, _buf)) = &self.cache { + if *cached_blk == blknum { + return Ok(self); + } + } + + // Read the block from the underlying reader, and cache it + self.cache = None; + let buf = self.reader.read_blk(blknum)?; + self.cache = Some((blknum, buf)); + + Ok(self) + } +} + +impl Deref for BlockCursor +where + R: BlockReader, +{ + type Target = [u8; PAGE_SZ]; + + fn deref(&self) -> &::Target { + &self.cache.as_ref().unwrap().1 + } +} + +lazy_static! { + static ref NEXT_ID: AtomicU64 = AtomicU64::new(1); +} + +/// An adapter for reading a (virtual) file using the page cache. +/// +/// The file is assumed to be immutable. This doesn't provide any functions +/// for modifying the file, nor for invalidating the cache if it is modified. +pub struct FileBlockReader { + pub file: F, + + /// Unique ID of this file, used as key in the page cache. + file_id: u64, +} + +impl FileBlockReader +where + F: FileExt, +{ + pub fn new(file: F) -> Self { + let file_id = NEXT_ID.fetch_add(1, std::sync::atomic::Ordering::Relaxed); + + FileBlockReader { file_id, file } + } + + /// Read a page from the underlying file into given buffer. + fn fill_buffer(&self, buf: &mut [u8], blkno: u32) -> Result<(), std::io::Error> { + assert!(buf.len() == PAGE_SZ); + self.file.read_exact_at(buf, blkno as u64 * PAGE_SZ as u64) + } +} + +impl BlockReader for FileBlockReader +where + F: FileExt, +{ + type BlockLease = page_cache::PageReadGuard<'static>; + + fn read_blk(&self, blknum: u32) -> Result { + // Look up the right page + let cache = page_cache::get(); + loop { + match cache.read_immutable_buf(self.file_id, blknum) { + ReadBufResult::Found(guard) => break Ok(guard), + ReadBufResult::NotFound(mut write_guard) => { + // Read the page from disk into the buffer + self.fill_buffer(write_guard.deref_mut(), blknum)?; + write_guard.mark_valid(); + + // Swap for read lock + continue; + } + }; + } + } +} diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs index 7013c2417c..f8828b541f 100644 --- a/pageserver/src/layered_repository/delta_layer.rs +++ b/pageserver/src/layered_repository/delta_layer.rs @@ -23,21 +23,27 @@ //! 000000067F000032BE0000400000000020B6-000000067F000032BE0000400000000030B6__000000578C6B29-0000000057A50051 //! //! -//! A delta file is constructed using the 'bookfile' crate. Each file consists of three -//! parts: the 'index', the values, and a short summary header. They are stored as -//! separate chapters. +//! Every delta file consists of three parts: "summary", "index", and +//! "values". The summary is a fixed size header at the beginning of the file, +//! and it contains basic information about the layer, and offsets to the other +//! parts. The "index" is a serialized HashMap mapping from Key and LSN to an offset in the +//! "values" part. The actual page images and WAL records are stored in the +//! "values" part. //! use crate::config::PageServerConf; +use crate::layered_repository::blob_io::{BlobCursor, BlobWriter, WriteBlobWriter}; +use crate::layered_repository::block_io::{BlockCursor, BlockReader, FileBlockReader}; use crate::layered_repository::filename::{DeltaFileName, PathOrConf}; use crate::layered_repository::storage_layer::{ BlobRef, Layer, ValueReconstructResult, ValueReconstructState, }; +use crate::page_cache::{PageReadGuard, PAGE_SZ}; use crate::repository::{Key, Value}; use crate::virtual_file::VirtualFile; use crate::walrecord; -use crate::DELTA_FILE_MAGIC; use crate::{ZTenantId, ZTimelineId}; -use anyhow::{bail, ensure, Result}; +use crate::{DELTA_FILE_MAGIC, STORAGE_FORMAT_VERSION}; +use anyhow::{bail, ensure, Context, Result}; use log::*; use serde::{Deserialize, Serialize}; use std::collections::HashMap; @@ -46,44 +52,43 @@ use zenith_utils::vec_map::VecMap; // while being able to use std::fmt::Write's methods use std::fmt::Write as _; use std::fs; -use std::io::BufWriter; -use std::io::Write; +use std::io::{BufWriter, Write}; +use std::io::{Seek, SeekFrom}; use std::ops::Range; use std::os::unix::fs::FileExt; use std::path::{Path, PathBuf}; use std::sync::{RwLock, RwLockReadGuard, RwLockWriteGuard, TryLockError}; -use bookfile::{Book, BookWriter, ChapterWriter}; - use zenith_utils::bin_ser::BeSer; use zenith_utils::lsn::Lsn; -/// Mapping from (key, lsn) -> page/WAL record -/// byte ranges in VALUES_CHAPTER -static INDEX_CHAPTER: u64 = 1; - -/// Page/WAL bytes - cannot be interpreted -/// without the page versions from the INDEX_CHAPTER -static VALUES_CHAPTER: u64 = 2; - -/// Contains the [`Summary`] struct -static SUMMARY_CHAPTER: u64 = 3; - #[derive(Debug, Serialize, Deserialize, PartialEq, Eq)] struct Summary { + /// Magic value to identify this as a zenith delta file. Always DELTA_FILE_MAGIC. + magic: u16, + format_version: u16, + tenantid: ZTenantId, timelineid: ZTimelineId, key_range: Range, lsn_range: Range, + + /// Block number where the 'index' part of the file begins. + index_start_blk: u32, } impl From<&DeltaLayer> for Summary { fn from(layer: &DeltaLayer) -> Self { Self { + magic: DELTA_FILE_MAGIC, + format_version: STORAGE_FORMAT_VERSION, + tenantid: layer.tenantid, timelineid: layer.timelineid, key_range: layer.key_range.clone(), lsn_range: layer.lsn_range.clone(), + + index_start_blk: 0, } } } @@ -118,7 +123,11 @@ pub struct DeltaLayerInner { /// index: HashMap>, - book: Option>, + // values copied from summary + index_start_blk: u32, + + /// Reader object for reading blocks from the file. (None if not loaded yet) + file: Option>, } impl Layer for DeltaLayer { @@ -155,45 +164,28 @@ impl Layer for DeltaLayer { { // Open the file and lock the metadata in memory let inner = self.load()?; - let values_reader = inner - .book - .as_ref() - .expect("should be loaded in load call above") - .chapter_reader(VALUES_CHAPTER)?; // Scan the page versions backwards, starting from `lsn`. if let Some(vec_map) = inner.index.get(&key) { + let mut reader = inner.file.as_ref().unwrap().block_cursor(); let slice = vec_map.slice_range(lsn_range); - let mut size = 0usize; - let mut first_pos = 0u64; - for (_entry_lsn, blob_ref) in slice.iter().rev() { - size += blob_ref.size(); - first_pos = blob_ref.pos(); - if blob_ref.will_init() { - break; - } - } - if size != 0 { - let mut buf = vec![0u8; size]; - values_reader.read_exact_at(&mut buf, first_pos)?; - for (entry_lsn, blob_ref) in slice.iter().rev() { - let offs = (blob_ref.pos() - first_pos) as usize; - let val = Value::des(&buf[offs..offs + blob_ref.size()])?; - match val { - Value::Image(img) => { - reconstruct_state.img = Some((*entry_lsn, img)); + for (entry_lsn, blob_ref) in slice.iter().rev() { + let buf = reader.read_blob(blob_ref.pos())?; + let val = Value::des(&buf)?; + match val { + Value::Image(img) => { + reconstruct_state.img = Some((*entry_lsn, img)); + need_image = false; + break; + } + Value::WalRecord(rec) => { + let will_init = rec.will_init(); + reconstruct_state.records.push((*entry_lsn, rec)); + if will_init { + // This WAL record initializes the page, so no need to go further back need_image = false; break; } - Value::WalRecord(rec) => { - let will_init = rec.will_init(); - reconstruct_state.records.push((*entry_lsn, rec)); - if will_init { - // This WAL record initializes the page, so no need to go further back - need_image = false; - break; - } - } } } } @@ -210,7 +202,7 @@ impl Layer for DeltaLayer { } } - fn iter(&self) -> Box> + '_> { + fn iter<'a>(&'a self) -> Box> + 'a> { let inner = self.load().unwrap(); match DeltaValueIter::new(inner) { @@ -281,20 +273,16 @@ impl Layer for DeltaLayer { let inner = self.load()?; - let path = self.path(); - let file = std::fs::File::open(&path)?; - let book = Book::new(file)?; - let chapter = book.chapter_reader(VALUES_CHAPTER)?; - let mut values: Vec<(&Key, &VecMap)> = inner.index.iter().collect(); values.sort_by_key(|k| k.0); + let mut reader = inner.file.as_ref().unwrap().block_cursor(); + for (key, versions) in values { for (lsn, blob_ref) in versions.as_slice() { let mut desc = String::new(); - let mut buf = vec![0u8; blob_ref.size()]; - match chapter.read_exact_at(&mut buf, blob_ref.pos()) { - Ok(()) => { + match reader.read_blob(blob_ref.pos()) { + Ok(buf) => { let val = Value::des(&buf); match val { @@ -378,19 +366,19 @@ impl DeltaLayer { let path = self.path(); // Open the file if it's not open already. - if inner.book.is_none() { - let file = VirtualFile::open(&path)?; - inner.book = Some(Book::new(file)?); + if inner.file.is_none() { + let file = VirtualFile::open(&path) + .with_context(|| format!("Failed to open file '{}'", path.display()))?; + inner.file = Some(FileBlockReader::new(file)); } - let book = inner.book.as_ref().unwrap(); + let file = inner.file.as_mut().unwrap(); + let summary_blk = file.read_blk(0)?; + let actual_summary = Summary::des_prefix(summary_blk.as_ref())?; match &self.path_or_conf { PathOrConf::Conf(_) => { - let chapter = book.read_chapter(SUMMARY_CHAPTER)?; - let actual_summary = Summary::des(&chapter)?; - - let expected_summary = Summary::from(self); - + let mut expected_summary = Summary::from(self); + expected_summary.index_start_blk = actual_summary.index_start_blk; if actual_summary != expected_summary { bail!("in-file summary does not match expected summary. actual = {:?} expected = {:?}", actual_summary, expected_summary); } @@ -409,8 +397,13 @@ impl DeltaLayer { } } - let chapter = book.read_chapter(INDEX_CHAPTER)?; - let index = HashMap::des(&chapter)?; + file.file.seek(SeekFrom::Start( + actual_summary.index_start_blk as u64 * PAGE_SZ as u64, + ))?; + let mut buf_reader = std::io::BufReader::new(&mut file.file); + let index = HashMap::des_from(&mut buf_reader)?; + + inner.index_start_blk = actual_summary.index_start_blk; debug!("loaded from {}", &path.display()); @@ -434,8 +427,9 @@ impl DeltaLayer { lsn_range: filename.lsn_range.clone(), inner: RwLock::new(DeltaLayerInner { loaded: false, - book: None, index: HashMap::default(), + file: None, + index_start_blk: 0, }), } } @@ -443,12 +437,14 @@ impl DeltaLayer { /// Create a DeltaLayer struct representing an existing file on disk. /// /// This variant is only used for debugging purposes, by the 'dump_layerfile' binary. - pub fn new_for_path(path: &Path, book: &Book) -> Result + pub fn new_for_path(path: &Path, file: F) -> Result where F: FileExt, { - let chapter = book.read_chapter(SUMMARY_CHAPTER)?; - let summary = Summary::des(&chapter)?; + let mut summary_buf = Vec::new(); + summary_buf.resize(PAGE_SZ, 0); + file.read_exact_at(&mut summary_buf, 0)?; + let summary = Summary::des_prefix(&summary_buf)?; Ok(DeltaLayer { path_or_conf: PathOrConf::Path(path.to_path_buf()), @@ -458,8 +454,9 @@ impl DeltaLayer { lsn_range: summary.lsn_range, inner: RwLock::new(DeltaLayerInner { loaded: false, - book: None, + file: None, index: HashMap::default(), + index_start_blk: 0, }), }) } @@ -504,8 +501,7 @@ pub struct DeltaLayerWriter { index: HashMap>, - values_writer: ChapterWriter>, - end_offset: u64, + blob_writer: WriteBlobWriter>, } impl DeltaLayerWriter { @@ -531,13 +527,10 @@ impl DeltaLayerWriter { u64::from(lsn_range.start), u64::from(lsn_range.end) )); - let file = VirtualFile::create(&path)?; + let mut file = VirtualFile::create(&path)?; + file.seek(SeekFrom::Start(PAGE_SZ as u64))?; let buf_writer = BufWriter::new(file); - let book = BookWriter::new(buf_writer, DELTA_FILE_MAGIC)?; - - // Open the page-versions chapter for writing. The calls to - // `put_value` will use this to write the contents. - let values_writer = book.new_chapter(VALUES_CHAPTER); + let blob_writer = WriteBlobWriter::new(buf_writer, PAGE_SZ as u64); Ok(DeltaLayerWriter { conf, @@ -547,8 +540,7 @@ impl DeltaLayerWriter { key_start, lsn_range, index: HashMap::new(), - values_writer, - end_offset: 0, + blob_writer, }) } @@ -558,17 +550,12 @@ impl DeltaLayerWriter { /// The values must be appended in key, lsn order. /// pub fn put_value(&mut self, key: Key, lsn: Lsn, val: Value) -> Result<()> { - //info!("DELTA: key {} at {} on {}", key, lsn, self.path.display()); assert!(self.lsn_range.start <= lsn); - // Remember the offset and size metadata. The metadata is written - // to a separate chapter, in `finish`. - let off = self.end_offset; - let buf = Value::ser(&val)?; - let len = buf.len(); - self.values_writer.write_all(&buf)?; - self.end_offset += len as u64; + + let off = self.blob_writer.write_blob(&Value::ser(&val)?)?; + let vec_map = self.index.entry(key).or_default(); - let blob_ref = BlobRef::new(off, len, val.will_init()); + let blob_ref = BlobRef::new(off, val.will_init()); let old = vec_map.append_or_update_last(lsn, blob_ref).unwrap().0; if old.is_some() { // We already had an entry for this LSN. That's odd.. @@ -583,38 +570,40 @@ impl DeltaLayerWriter { } pub fn size(&self) -> u64 { - self.end_offset + self.blob_writer.size() } /// /// Finish writing the delta layer. /// pub fn finish(self, key_end: Key) -> anyhow::Result { - // Close the values chapter - let book = self.values_writer.close()?; + let index_start_blk = + ((self.blob_writer.size() + PAGE_SZ as u64 - 1) / PAGE_SZ as u64) as u32; + + let buf_writer = self.blob_writer.into_inner(); + let mut file = buf_writer.into_inner()?; // Write out the index - let mut chapter = book.new_chapter(INDEX_CHAPTER); let buf = HashMap::ser(&self.index)?; - chapter.write_all(&buf)?; - let book = chapter.close()?; + file.seek(SeekFrom::Start(index_start_blk as u64 * PAGE_SZ as u64))?; + file.write_all(&buf)?; - let mut chapter = book.new_chapter(SUMMARY_CHAPTER); + // Fill in the summary on blk 0 let summary = Summary { + magic: DELTA_FILE_MAGIC, + format_version: STORAGE_FORMAT_VERSION, tenantid: self.tenantid, timelineid: self.timelineid, key_range: self.key_start..key_end, lsn_range: self.lsn_range.clone(), + index_start_blk, }; - Summary::ser_into(&summary, &mut chapter)?; - let book = chapter.close()?; - - // This flushes the underlying 'buf_writer'. - book.close()?; + file.seek(SeekFrom::Start(0))?; + Summary::ser_into(&summary, &mut file)?; // Note: Because we opened the file in write-only mode, we cannot // reuse the same VirtualFile for reading later. That's why we don't - // set inner.book here. The first read will have to re-open it. + // set inner.file here. The first read will have to re-open it. let layer = DeltaLayer { path_or_conf: PathOrConf::Conf(self.conf), tenantid: self.tenantid, @@ -624,7 +613,8 @@ impl DeltaLayerWriter { inner: RwLock::new(DeltaLayerInner { loaded: false, index: HashMap::new(), - book: None, + file: None, + index_start_blk, }), }; @@ -647,22 +637,6 @@ impl DeltaLayerWriter { Ok(layer) } - - pub fn abort(self) { - match self.values_writer.close() { - Ok(book) => { - if let Err(err) = book.close() { - error!("error while closing delta layer file: {}", err); - } - } - Err(err) => { - error!("error while closing chapter writer: {}", err); - } - } - if let Err(err) = std::fs::remove_file(self.path) { - error!("error removing unfinished delta layer file: {}", err); - } - } } /// @@ -672,13 +646,23 @@ impl DeltaLayerWriter { /// That takes up quite a lot of memory. Should do this in a more streaming /// fashion. /// -struct DeltaValueIter { +struct DeltaValueIter<'a> { all_offsets: Vec<(Key, Lsn, BlobRef)>, next_idx: usize, - data: Vec, + reader: BlockCursor>, } -impl Iterator for DeltaValueIter { +struct Adapter<'a>(RwLockReadGuard<'a, DeltaLayerInner>); + +impl<'a> BlockReader for Adapter<'a> { + type BlockLease = PageReadGuard<'static>; + + fn read_blk(&self, blknum: u32) -> Result { + self.0.file.as_ref().unwrap().read_blk(blknum) + } +} + +impl<'a> Iterator for DeltaValueIter<'a> { type Item = Result<(Key, Lsn, Value)>; fn next(&mut self) -> Option { @@ -686,8 +670,8 @@ impl Iterator for DeltaValueIter { } } -impl DeltaValueIter { - fn new(inner: RwLockReadGuard) -> Result { +impl<'a> DeltaValueIter<'a> { + fn new(inner: RwLockReadGuard<'a, DeltaLayerInner>) -> Result { let mut index: Vec<(&Key, &VecMap)> = inner.index.iter().collect(); index.sort_by_key(|x| x.0); @@ -698,30 +682,24 @@ impl DeltaValueIter { } } - let values_reader = inner - .book - .as_ref() - .expect("should be loaded in load call above") - .chapter_reader(VALUES_CHAPTER)?; - let file_size = values_reader.len() as usize; - let mut layer = DeltaValueIter { + let iter = DeltaValueIter { all_offsets, next_idx: 0, - data: vec![0u8; file_size], + reader: BlockCursor::new(Adapter(inner)), }; - values_reader.read_exact_at(&mut layer.data, 0)?; - Ok(layer) + Ok(iter) } fn next_res(&mut self) -> Result> { if self.next_idx < self.all_offsets.len() { - let (key, lsn, blob_ref) = self.all_offsets[self.next_idx]; - let offs = blob_ref.pos() as usize; - let size = blob_ref.size(); - let val = Value::des(&self.data[offs..offs + size])?; + let (key, lsn, off) = &self.all_offsets[self.next_idx]; + + //let mut reader = BlobReader::new(self.inner.file.as_ref().unwrap()); + let buf = self.reader.read_blob(off.pos())?; + let val = Value::des(&buf)?; self.next_idx += 1; - Ok(Some((key, lsn, val))) + Ok(Some((*key, *lsn, val))) } else { Ok(None) } diff --git a/pageserver/src/layered_repository/ephemeral_file.rs b/pageserver/src/layered_repository/ephemeral_file.rs index 79a72f4563..d509186e6f 100644 --- a/pageserver/src/layered_repository/ephemeral_file.rs +++ b/pageserver/src/layered_repository/ephemeral_file.rs @@ -2,6 +2,8 @@ //! used to keep in-memory layers spilled on disk. use crate::config::PageServerConf; +use crate::layered_repository::blob_io::BlobWriter; +use crate::layered_repository::block_io::BlockReader; use crate::page_cache; use crate::page_cache::PAGE_SZ; use crate::page_cache::{ReadBufResult, WriteBufResult}; @@ -10,7 +12,7 @@ use lazy_static::lazy_static; use std::cmp::min; use std::collections::HashMap; use std::fs::OpenOptions; -use std::io::{Error, ErrorKind, Seek, SeekFrom, Write}; +use std::io::{Error, ErrorKind}; use std::ops::DerefMut; use std::path::PathBuf; use std::sync::{Arc, RwLock}; @@ -41,7 +43,7 @@ pub struct EphemeralFile { _timelineid: ZTimelineId, file: Arc, - pos: u64, + size: u64, } impl EphemeralFile { @@ -70,11 +72,11 @@ impl EphemeralFile { _tenantid: tenantid, _timelineid: timelineid, file: file_rc, - pos: 0, + size: 0, }) } - pub fn fill_buffer(&self, buf: &mut [u8], blkno: u32) -> Result<(), Error> { + fn fill_buffer(&self, buf: &mut [u8], blkno: u32) -> Result<(), Error> { let mut off = 0; while off < PAGE_SZ { let n = self @@ -93,6 +95,26 @@ impl EphemeralFile { } Ok(()) } + + fn get_buf_for_write(&self, blkno: u32) -> Result { + // Look up the right page + let cache = page_cache::get(); + let mut write_guard = match cache.write_ephemeral_buf(self.file_id, blkno) { + WriteBufResult::Found(guard) => guard, + WriteBufResult::NotFound(mut guard) => { + // Read the page from disk into the buffer + // TODO: if we're overwriting the whole page, no need to read it in first + self.fill_buffer(guard.deref_mut(), blkno)?; + guard.mark_valid(); + + // And then fall through to modify it. + guard + } + }; + write_guard.mark_dirty(); + + Ok(write_guard) + } } /// Does the given filename look like an ephemeral file? @@ -167,48 +189,49 @@ impl FileExt for EphemeralFile { } } -impl Write for EphemeralFile { - fn write(&mut self, buf: &[u8]) -> Result { - let n = self.write_at(buf, self.pos)?; - self.pos += n as u64; - Ok(n) - } +impl BlobWriter for EphemeralFile { + fn write_blob(&mut self, srcbuf: &[u8]) -> Result { + let pos = self.size; - fn flush(&mut self) -> Result<(), std::io::Error> { - // we don't need to flush data: - // * we either write input bytes or not, not keeping any intermediate data buffered - // * rust unix file `flush` impl does not flush things either, returning `Ok(())` - Ok(()) - } -} + let mut blknum = (self.size / PAGE_SZ as u64) as u32; + let mut off = (pos % PAGE_SZ as u64) as usize; -impl Seek for EphemeralFile { - fn seek(&mut self, pos: SeekFrom) -> Result { - match pos { - SeekFrom::Start(offset) => { - self.pos = offset; - } - SeekFrom::End(_offset) => { - return Err(Error::new( - ErrorKind::Other, - "SeekFrom::End not supported by EphemeralFile", - )); - } - SeekFrom::Current(offset) => { - let pos = self.pos as i128 + offset as i128; - if pos < 0 { - return Err(Error::new( - ErrorKind::InvalidInput, - "offset would be negative", - )); - } - if pos > u64::MAX as i128 { - return Err(Error::new(ErrorKind::InvalidInput, "offset overflow")); - } - self.pos = pos as u64; - } + let mut buf = self.get_buf_for_write(blknum)?; + + // Write the length field + let len_buf = u32::to_ne_bytes(srcbuf.len() as u32); + let thislen = PAGE_SZ - off; + if thislen < 4 { + // it needs to be split across pages + buf[off..(off + thislen)].copy_from_slice(&len_buf[..thislen]); + blknum += 1; + buf = self.get_buf_for_write(blknum)?; + buf[0..4 - thislen].copy_from_slice(&len_buf[thislen..]); + off = 4 - thislen; + } else { + buf[off..off + 4].copy_from_slice(&len_buf); + off += 4; } - Ok(self.pos) + + // Write the payload + let mut buf_remain = srcbuf; + while !buf_remain.is_empty() { + let mut page_remain = PAGE_SZ - off; + if page_remain == 0 { + blknum += 1; + buf = self.get_buf_for_write(blknum)?; + off = 0; + page_remain = PAGE_SZ; + } + let this_blk_len = min(page_remain, buf_remain.len()); + buf[off..(off + this_blk_len)].copy_from_slice(&buf_remain[..this_blk_len]); + off += this_blk_len; + buf_remain = &buf_remain[this_blk_len..]; + } + drop(buf); + self.size += 4 + srcbuf.len() as u64; + + Ok(pos) } } @@ -239,11 +262,34 @@ pub fn writeback(file_id: u64, blkno: u32, buf: &[u8]) -> Result<(), std::io::Er } } +impl BlockReader for EphemeralFile { + type BlockLease = page_cache::PageReadGuard<'static>; + + fn read_blk(&self, blknum: u32) -> Result { + // Look up the right page + let cache = page_cache::get(); + loop { + match cache.read_ephemeral_buf(self.file_id, blknum) { + ReadBufResult::Found(guard) => return Ok(guard), + ReadBufResult::NotFound(mut write_guard) => { + // Read the page from disk into the buffer + self.fill_buffer(write_guard.deref_mut(), blknum)?; + write_guard.mark_valid(); + + // Swap for read lock + continue; + } + }; + } + } +} + #[cfg(test)] mod tests { use super::*; - use rand::seq::SliceRandom; - use rand::thread_rng; + use crate::layered_repository::blob_io::{BlobCursor, BlobWriter}; + use crate::layered_repository::block_io::BlockCursor; + use rand::{seq::SliceRandom, thread_rng, RngCore}; use std::fs; use std::str::FromStr; @@ -281,19 +327,19 @@ mod tests { fn test_ephemeral_files() -> Result<(), Error> { let (conf, tenantid, timelineid) = repo_harness("ephemeral_files")?; - let mut file_a = EphemeralFile::create(conf, tenantid, timelineid)?; + let file_a = EphemeralFile::create(conf, tenantid, timelineid)?; - file_a.write_all(b"foo")?; + file_a.write_all_at(b"foo", 0)?; assert_eq!("foo", read_string(&file_a, 0, 20)?); - file_a.write_all(b"bar")?; + file_a.write_all_at(b"bar", 3)?; assert_eq!("foobar", read_string(&file_a, 0, 20)?); // Open a lot of files, enough to cause some page evictions. let mut efiles = Vec::new(); for fileno in 0..100 { - let mut efile = EphemeralFile::create(conf, tenantid, timelineid)?; - efile.write_all(format!("file {}", fileno).as_bytes())?; + let efile = EphemeralFile::create(conf, tenantid, timelineid)?; + efile.write_all_at(format!("file {}", fileno).as_bytes(), 0)?; assert_eq!(format!("file {}", fileno), read_string(&efile, 0, 10)?); efiles.push((fileno, efile)); } @@ -307,4 +353,41 @@ mod tests { Ok(()) } + + #[test] + fn test_ephemeral_blobs() -> Result<(), Error> { + let (conf, tenantid, timelineid) = repo_harness("ephemeral_blobs")?; + + let mut file = EphemeralFile::create(conf, tenantid, timelineid)?; + + let pos_foo = file.write_blob(b"foo")?; + assert_eq!(b"foo", file.block_cursor().read_blob(pos_foo)?.as_slice()); + let pos_bar = file.write_blob(b"bar")?; + assert_eq!(b"foo", file.block_cursor().read_blob(pos_foo)?.as_slice()); + assert_eq!(b"bar", file.block_cursor().read_blob(pos_bar)?.as_slice()); + + let mut blobs = Vec::new(); + for i in 0..10000 { + let data = Vec::from(format!("blob{}", i).as_bytes()); + let pos = file.write_blob(&data)?; + blobs.push((pos, data)); + } + + let mut cursor = BlockCursor::new(&file); + for (pos, expected) in blobs { + let actual = cursor.read_blob(pos)?; + assert_eq!(actual, expected); + } + drop(cursor); + + // Test a large blob that spans multiple pages + let mut large_data = Vec::new(); + large_data.resize(20000, 0); + thread_rng().fill_bytes(&mut large_data); + let pos_large = file.write_blob(&large_data)?; + let result = file.block_cursor().read_blob(pos_large)?; + assert_eq!(result, large_data); + + Ok(()) + } } diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs index 68d1cd4a8a..a8e5de09f5 100644 --- a/pageserver/src/layered_repository/image_layer.rs +++ b/pageserver/src/layered_repository/image_layer.rs @@ -13,63 +13,70 @@ //! //! 000000067F000032BE0000400000000070B6-000000067F000032BE0000400000000080B6__00000000346BC568 //! -//! An image file is constructed using the 'bookfile' crate. +//! Every image layer file consists of three parts: "summary", +//! "index", and "values". The summary is a fixed size header at the +//! beginning of the file, and it contains basic information about the +//! layer, and offsets to the other parts. The "index" is a serialized +//! HashMap, mapping from Key to an offset in the "values" part. The +//! actual page images are stored in the "values" part. //! -//! Only metadata is loaded into memory by the load function. +//! Only the "index" is loaded into memory by the load function. //! When images are needed, they are read directly from disk. //! use crate::config::PageServerConf; +use crate::layered_repository::blob_io::{BlobCursor, BlobWriter, WriteBlobWriter}; +use crate::layered_repository::block_io::{BlockReader, FileBlockReader}; use crate::layered_repository::filename::{ImageFileName, PathOrConf}; use crate::layered_repository::storage_layer::{ BlobRef, Layer, ValueReconstructResult, ValueReconstructState, }; +use crate::page_cache::PAGE_SZ; use crate::repository::{Key, Value}; use crate::virtual_file::VirtualFile; -use crate::IMAGE_FILE_MAGIC; use crate::{ZTenantId, ZTimelineId}; +use crate::{IMAGE_FILE_MAGIC, STORAGE_FORMAT_VERSION}; use anyhow::{bail, ensure, Context, Result}; use bytes::Bytes; use log::*; use serde::{Deserialize, Serialize}; use std::collections::HashMap; use std::fs; -use std::io::{BufWriter, Write}; +use std::io::Write; +use std::io::{Seek, SeekFrom}; use std::ops::Range; use std::path::{Path, PathBuf}; use std::sync::{RwLock, RwLockReadGuard, TryLockError}; -use bookfile::{Book, BookWriter, ChapterWriter}; - use zenith_utils::bin_ser::BeSer; use zenith_utils::lsn::Lsn; -/// Mapping from (key, lsn) -> page/WAL record -/// byte ranges in VALUES_CHAPTER -static INDEX_CHAPTER: u64 = 1; - -/// Contains each block in block # order -const VALUES_CHAPTER: u64 = 2; - -/// Contains the [`Summary`] struct -const SUMMARY_CHAPTER: u64 = 3; - #[derive(Debug, Serialize, Deserialize, PartialEq, Eq)] struct Summary { + /// Magic value to identify this as a zenith image file. Always IMAGE_FILE_MAGIC. + magic: u16, + format_version: u16, + tenantid: ZTenantId, timelineid: ZTimelineId, key_range: Range, - lsn: Lsn, + + /// Block number where the 'index' part of the file begins. + index_start_blk: u32, } impl From<&ImageLayer> for Summary { fn from(layer: &ImageLayer) -> Self { Self { + magic: IMAGE_FILE_MAGIC, + format_version: STORAGE_FORMAT_VERSION, tenantid: layer.tenantid, timelineid: layer.timelineid, key_range: layer.key_range.clone(), lsn: layer.lsn, + + index_start_blk: 0, } } } @@ -97,12 +104,14 @@ pub struct ImageLayerInner { /// If false, the 'index' has not been loaded into memory yet. loaded: bool, - /// The underlying (virtual) file handle. None if the layer hasn't been loaded - /// yet. - book: Option>, - /// offset of each value index: HashMap, + + // values copied from summary + index_start_blk: u32, + + /// Reader object for reading blocks from the file. (None if not loaded yet) + file: Option>, } impl Layer for ImageLayer { @@ -138,26 +147,21 @@ impl Layer for ImageLayer { assert!(lsn_range.end >= self.lsn); let inner = self.load()?; - if let Some(blob_ref) = inner.index.get(&key) { - let chapter = inner - .book + let buf = inner + .file .as_ref() .unwrap() - .chapter_reader(VALUES_CHAPTER)?; - - let mut blob = vec![0; blob_ref.size()]; - chapter - .read_exact_at(&mut blob, blob_ref.pos()) + .block_cursor() + .read_blob(blob_ref.pos()) .with_context(|| { format!( - "failed to read {} bytes from data file {} at offset {}", - blob_ref.size(), + "failed to read blob from data file {} at offset {}", self.filename().display(), blob_ref.pos() ) })?; - let value = Bytes::from(blob); + let value = Bytes::from(buf); reconstruct_state.img = Some((self.lsn, value)); Ok(ValueReconstructResult::Complete) @@ -228,12 +232,7 @@ impl Layer for ImageLayer { index_vec.sort_by_key(|x| x.1.pos()); for (key, blob_ref) in index_vec { - println!( - "key: {} size {} offset {}", - key, - blob_ref.size(), - blob_ref.pos() - ); + println!("key: {} offset {}", key, blob_ref.pos()); } Ok(()) @@ -291,21 +290,19 @@ impl ImageLayer { let path = self.path(); // Open the file if it's not open already. - if inner.book.is_none() { + if inner.file.is_none() { let file = VirtualFile::open(&path) .with_context(|| format!("Failed to open file '{}'", path.display()))?; - inner.book = Some(Book::new(file).with_context(|| { - format!("Failed to open file '{}' as a bookfile", path.display()) - })?); + inner.file = Some(FileBlockReader::new(file)); } - let book = inner.book.as_ref().unwrap(); + let file = inner.file.as_mut().unwrap(); + let summary_blk = file.read_blk(0)?; + let actual_summary = Summary::des_prefix(summary_blk.as_ref())?; match &self.path_or_conf { PathOrConf::Conf(_) => { - let chapter = book.read_chapter(SUMMARY_CHAPTER)?; - let actual_summary = Summary::des(&chapter)?; - - let expected_summary = Summary::from(self); + let mut expected_summary = Summary::from(self); + expected_summary.index_start_blk = actual_summary.index_start_blk; if actual_summary != expected_summary { bail!("in-file summary does not match expected summary. actual = {:?} expected = {:?}", actual_summary, expected_summary); @@ -325,14 +322,18 @@ impl ImageLayer { } } - let chapter = book.read_chapter(INDEX_CHAPTER)?; - let index = HashMap::des(&chapter)?; + file.file.seek(SeekFrom::Start( + actual_summary.index_start_blk as u64 * PAGE_SZ as u64, + ))?; + let mut buf_reader = std::io::BufReader::new(&mut file.file); + let index = HashMap::des_from(&mut buf_reader)?; + + inner.index_start_blk = actual_summary.index_start_blk; info!("loaded from {}", &path.display()); inner.index = index; inner.loaded = true; - Ok(()) } @@ -350,9 +351,10 @@ impl ImageLayer { key_range: filename.key_range.clone(), lsn: filename.lsn, inner: RwLock::new(ImageLayerInner { - book: None, index: HashMap::new(), loaded: false, + file: None, + index_start_blk: 0, }), } } @@ -360,12 +362,14 @@ impl ImageLayer { /// Create an ImageLayer struct representing an existing file on disk. /// /// This variant is only used for debugging purposes, by the 'dump_layerfile' binary. - pub fn new_for_path(path: &Path, book: &Book) -> Result + pub fn new_for_path(path: &Path, file: F) -> Result where F: std::os::unix::prelude::FileExt, { - let chapter = book.read_chapter(SUMMARY_CHAPTER)?; - let summary = Summary::des(&chapter)?; + let mut summary_buf = Vec::new(); + summary_buf.resize(PAGE_SZ, 0); + file.read_exact_at(&mut summary_buf, 0)?; + let summary = Summary::des_prefix(&summary_buf)?; Ok(ImageLayer { path_or_conf: PathOrConf::Path(path.to_path_buf()), @@ -374,9 +378,10 @@ impl ImageLayer { key_range: summary.key_range, lsn: summary.lsn, inner: RwLock::new(ImageLayerInner { - book: None, + file: None, index: HashMap::new(), loaded: false, + index_start_blk: 0, }), }) } @@ -412,18 +417,15 @@ impl ImageLayer { /// pub struct ImageLayerWriter { conf: &'static PageServerConf, - path: PathBuf, + _path: PathBuf, timelineid: ZTimelineId, tenantid: ZTenantId, key_range: Range, lsn: Lsn, - values_writer: Option>>, - end_offset: u64, - index: HashMap, - finished: bool, + blob_writer: WriteBlobWriter, } impl ImageLayerWriter { @@ -449,24 +451,17 @@ impl ImageLayerWriter { ); info!("new image layer {}", path.display()); let file = VirtualFile::create(&path)?; - let buf_writer = BufWriter::new(file); - let book = BookWriter::new(buf_writer, IMAGE_FILE_MAGIC)?; - - // Open the page-images chapter for writing. The calls to - // `put_image` will use this to write the contents. - let chapter = book.new_chapter(VALUES_CHAPTER); + let blob_writer = WriteBlobWriter::new(file, PAGE_SZ as u64); let writer = ImageLayerWriter { conf, - path, + _path: path, timelineid, tenantid, key_range: key_range.clone(), lsn, - values_writer: Some(chapter), index: HashMap::new(), - end_offset: 0, - finished: false, + blob_writer, }; Ok(writer) @@ -479,49 +474,41 @@ impl ImageLayerWriter { /// pub fn put_image(&mut self, key: Key, img: &[u8]) -> Result<()> { ensure!(self.key_range.contains(&key)); - let off = self.end_offset; + let off = self.blob_writer.write_blob(img)?; - if let Some(writer) = &mut self.values_writer { - let len = img.len(); - writer.write_all(img)?; - self.end_offset += len as u64; - - let old = self.index.insert(key, BlobRef::new(off, len, true)); - assert!(old.is_none()); - } else { - panic!() - } + let old = self.index.insert(key, BlobRef::new(off, true)); + assert!(old.is_none()); Ok(()) } - pub fn finish(&mut self) -> anyhow::Result { - // Close the values chapter - let book = self.values_writer.take().unwrap().close()?; + pub fn finish(self) -> anyhow::Result { + let index_start_blk = + ((self.blob_writer.size() + PAGE_SZ as u64 - 1) / PAGE_SZ as u64) as u32; + + let mut file = self.blob_writer.into_inner(); // Write out the index - let mut chapter = book.new_chapter(INDEX_CHAPTER); let buf = HashMap::ser(&self.index)?; - chapter.write_all(&buf)?; - let book = chapter.close()?; + file.seek(SeekFrom::Start(index_start_blk as u64 * PAGE_SZ as u64))?; + file.write_all(&buf)?; - // Write out the summary chapter - let mut chapter = book.new_chapter(SUMMARY_CHAPTER); + // Fill in the summary on blk 0 let summary = Summary { + magic: IMAGE_FILE_MAGIC, + format_version: STORAGE_FORMAT_VERSION, tenantid: self.tenantid, timelineid: self.timelineid, key_range: self.key_range.clone(), lsn: self.lsn, + index_start_blk, }; - Summary::ser_into(&summary, &mut chapter)?; - let book = chapter.close()?; - - // This flushes the underlying 'buf_writer'. - book.close()?; + file.seek(SeekFrom::Start(0))?; + Summary::ser_into(&summary, &mut file)?; // Note: Because we open the file in write-only mode, we cannot // reuse the same VirtualFile for reading later. That's why we don't - // set inner.book here. The first read will have to re-open it. + // set inner.file here. The first read will have to re-open it. let layer = ImageLayer { path_or_conf: PathOrConf::Conf(self.conf), timelineid: self.timelineid, @@ -529,28 +516,14 @@ impl ImageLayerWriter { key_range: self.key_range.clone(), lsn: self.lsn, inner: RwLock::new(ImageLayerInner { - book: None, loaded: false, index: HashMap::new(), + file: None, + index_start_blk, }), }; trace!("created image layer {}", layer.path().display()); - self.finished = true; - Ok(layer) } } - -impl Drop for ImageLayerWriter { - fn drop(&mut self) { - if let Some(page_image_writer) = self.values_writer.take() { - if let Ok(book) = page_image_writer.close() { - let _ = book.close(); - } - } - if !self.finished { - let _ = fs::remove_file(&self.path); - } - } -} diff --git a/pageserver/src/layered_repository/inmemory_layer.rs b/pageserver/src/layered_repository/inmemory_layer.rs index 8670442a2c..8a24528732 100644 --- a/pageserver/src/layered_repository/inmemory_layer.rs +++ b/pageserver/src/layered_repository/inmemory_layer.rs @@ -5,10 +5,12 @@ //! its position in the file, is kept in memory, though. //! use crate::config::PageServerConf; +use crate::layered_repository::blob_io::{BlobCursor, BlobWriter}; +use crate::layered_repository::block_io::BlockReader; use crate::layered_repository::delta_layer::{DeltaLayer, DeltaLayerWriter}; use crate::layered_repository::ephemeral_file::EphemeralFile; use crate::layered_repository::storage_layer::{ - BlobRef, Layer, ValueReconstructResult, ValueReconstructState, + Layer, ValueReconstructResult, ValueReconstructState, }; use crate::repository::{Key, Value}; use crate::walrecord; @@ -19,9 +21,7 @@ use std::collections::HashMap; // avoid binding to Write (conflicts with std::io::Write) // while being able to use std::fmt::Write's methods use std::fmt::Write as _; -use std::io::Write; use std::ops::Range; -use std::os::unix::fs::FileExt; use std::path::PathBuf; use std::sync::RwLock; use zenith_utils::bin_ser::BeSer; @@ -54,14 +54,12 @@ pub struct InMemoryLayerInner { /// by block number and LSN. The value is an offset into the /// ephemeral file where the page version is stored. /// - index: HashMap>, + index: HashMap>, /// The values are stored in a serialized format in this file. /// Each serialized Value is preceded by a 'u32' length field. /// PerSeg::page_versions map stores offsets into this file. file: EphemeralFile, - - end_offset: u64, } impl InMemoryLayerInner { @@ -120,10 +118,12 @@ impl Layer for InMemoryLayer { let inner = self.inner.read().unwrap(); + let mut reader = inner.file.block_cursor(); + // Scan the page versions backwards, starting from `lsn`. if let Some(vec_map) = inner.index.get(&key) { let slice = vec_map.slice_range(lsn_range); - for (entry_lsn, blob_ref) in slice.iter().rev() { + for (entry_lsn, pos) in slice.iter().rev() { match &reconstruct_state.img { Some((cached_lsn, _)) if entry_lsn <= cached_lsn => { return Ok(ValueReconstructResult::Complete) @@ -131,8 +131,7 @@ impl Layer for InMemoryLayer { _ => {} } - let mut buf = vec![0u8; blob_ref.size()]; - inner.file.read_exact_at(&mut buf, blob_ref.pos())?; + let buf = reader.read_blob(*pos)?; let value = Value::des(&buf)?; match value { Value::Image(img) => { @@ -208,12 +207,12 @@ impl Layer for InMemoryLayer { return Ok(()); } + let mut cursor = inner.file.block_cursor(); let mut buf = Vec::new(); for (key, vec_map) in inner.index.iter() { - for (lsn, blob_ref) in vec_map.as_slice() { + for (lsn, pos) in vec_map.as_slice() { let mut desc = String::new(); - buf.resize(blob_ref.size(), 0); - inner.file.read_exact_at(&mut buf, blob_ref.pos())?; + cursor.read_blob_into_buf(*pos, &mut buf)?; let val = Value::des(&buf); match val { Ok(Value::Image(img)) => { @@ -268,7 +267,6 @@ impl InMemoryLayer { end_lsn: None, index: HashMap::new(), file, - end_offset: 0, }), }) } @@ -283,15 +281,10 @@ impl InMemoryLayer { inner.assert_writeable(); - let off = inner.end_offset; - let buf = Value::ser(&val)?; - let len = buf.len(); - inner.file.write_all(&buf)?; - inner.end_offset += len as u64; + let off = inner.file.write_blob(&Value::ser(&val)?)?; let vec_map = inner.index.entry(key).or_default(); - let blob_ref = BlobRef::new(off, len, val.will_init()); - let old = vec_map.append_or_update_last(lsn, blob_ref).unwrap().0; + let old = vec_map.append_or_update_last(lsn, off).unwrap().0; if old.is_some() { // We already had an entry for this LSN. That's odd.. warn!("Key {} at {} already exists", key, lsn); @@ -345,21 +338,21 @@ impl InMemoryLayer { self.start_lsn..inner.end_lsn.unwrap(), )?; - let mut do_steps = || -> Result<()> { - for (key, vec_map) in inner.index.iter() { - // Write all page versions - for (lsn, blob_ref) in vec_map.as_slice() { - let mut buf = vec![0u8; blob_ref.size()]; - inner.file.read_exact_at(&mut buf, blob_ref.pos())?; - let val = Value::des(&buf)?; - delta_layer_writer.put_value(*key, *lsn, val)?; - } + let mut buf = Vec::new(); + + let mut cursor = inner.file.block_cursor(); + + let mut keys: Vec<(&Key, &VecMap)> = inner.index.iter().collect(); + keys.sort_by_key(|k| k.0); + + for (key, vec_map) in keys.iter() { + let key = **key; + // Write all page versions + for (lsn, pos) in vec_map.as_slice() { + cursor.read_blob_into_buf(*pos, &mut buf)?; + let val = Value::des(&buf)?; + delta_layer_writer.put_value(key, *lsn, val)?; } - Ok(()) - }; - if let Err(err) = do_steps() { - delta_layer_writer.abort(); - return Err(err); } let delta_layer = delta_layer_writer.finish(Key::MAX)?; diff --git a/pageserver/src/layered_repository/storage_layer.rs b/pageserver/src/layered_repository/storage_layer.rs index 2711640736..b5366da223 100644 --- a/pageserver/src/layered_repository/storage_layer.rs +++ b/pageserver/src/layered_repository/storage_layer.rs @@ -150,9 +150,10 @@ pub trait Layer: Send + Sync { const WILL_INIT: u64 = 1; /// -/// Struct representing reference to BLOB in layers. Reference contains BLOB offset and size. -/// For WAL records (delta layer) it also contains `will_init` flag which helps to determine range of records -/// which needs to be applied without reading/deserializing records themselves. +/// Struct representing reference to BLOB in layers. Reference contains BLOB +/// offset, and for WAL records it also contains `will_init` flag. The flag +/// helps to determine the range of records that needs to be applied, without +/// reading/deserializing records themselves. /// #[derive(Debug, Serialize, Deserialize, Copy, Clone)] pub struct BlobRef(u64); @@ -163,15 +164,11 @@ impl BlobRef { } pub fn pos(&self) -> u64 { - self.0 >> 32 + self.0 >> 1 } - pub fn size(&self) -> usize { - ((self.0 & 0xFFFFFFFF) >> 1) as usize - } - - pub fn new(pos: u64, size: usize, will_init: bool) -> BlobRef { - let mut blob_ref = (pos << 32) | ((size as u64) << 1); + pub fn new(pos: u64, will_init: bool) -> BlobRef { + let mut blob_ref = pos << 1; if will_init { blob_ref |= WILL_INIT; } diff --git a/pageserver/src/lib.rs b/pageserver/src/lib.rs index 4790ab6652..6d2631b2b1 100644 --- a/pageserver/src/lib.rs +++ b/pageserver/src/lib.rs @@ -38,11 +38,11 @@ use pgdatadir_mapping::DatadirTimeline; /// This is embedded in the metadata file, and also in the header of all the /// layer files. If you make any backwards-incompatible changes to the storage /// format, bump this! -pub const STORAGE_FORMAT_VERSION: u16 = 1; +pub const STORAGE_FORMAT_VERSION: u16 = 2; // Magic constants used to identify different kinds of files -pub const IMAGE_FILE_MAGIC: u32 = 0x5A60_0000 | STORAGE_FORMAT_VERSION as u32; -pub const DELTA_FILE_MAGIC: u32 = 0x5A61_0000 | STORAGE_FORMAT_VERSION as u32; +pub const IMAGE_FILE_MAGIC: u16 = 0x5A60; +pub const DELTA_FILE_MAGIC: u16 = 0x5A61; lazy_static! { static ref LIVE_CONNECTIONS_COUNT: IntGaugeVec = register_int_gauge_vec!( diff --git a/pageserver/src/page_cache.rs b/pageserver/src/page_cache.rs index c485e46f47..bd44384a44 100644 --- a/pageserver/src/page_cache.rs +++ b/pageserver/src/page_cache.rs @@ -56,7 +56,7 @@ use crate::layered_repository::writeback_ephemeral_file; use crate::repository::Key; static PAGE_CACHE: OnceCell = OnceCell::new(); -const TEST_PAGE_CACHE_SIZE: usize = 10; +const TEST_PAGE_CACHE_SIZE: usize = 50; /// /// Initialize the page cache. This must be called once at page server startup. @@ -90,6 +90,7 @@ const MAX_USAGE_COUNT: u8 = 5; /// CacheKey uniquely identifies a "thing" to cache in the page cache. /// #[derive(Debug, PartialEq, Eq, Clone)] +#[allow(clippy::enum_variant_names)] enum CacheKey { MaterializedPage { hash_key: MaterializedPageHashKey, @@ -99,6 +100,10 @@ enum CacheKey { file_id: u64, blkno: u32, }, + ImmutableFilePage { + file_id: u64, + blkno: u32, + }, } #[derive(Debug, PartialEq, Eq, Hash, Clone)] @@ -173,6 +178,8 @@ pub struct PageCache { ephemeral_page_map: RwLock>, + immutable_page_map: RwLock>, + /// The actual buffers with their metadata. slots: Box<[Slot]>, @@ -195,6 +202,12 @@ impl std::ops::Deref for PageReadGuard<'_> { } } +impl AsRef<[u8; PAGE_SZ]> for PageReadGuard<'_> { + fn as_ref(&self) -> &[u8; PAGE_SZ] { + self.0.buf + } +} + /// /// PageWriteGuard is a lease on a buffer for modifying it. The page is kept locked /// until the guard is dropped. @@ -226,6 +239,12 @@ impl std::ops::Deref for PageWriteGuard<'_> { } } +impl AsMut<[u8; PAGE_SZ]> for PageWriteGuard<'_> { + fn as_mut(&mut self) -> &mut [u8; PAGE_SZ] { + self.inner.buf + } +} + impl PageWriteGuard<'_> { /// Mark that the buffer contents are now valid. pub fn mark_valid(&mut self) { @@ -381,6 +400,36 @@ impl PageCache { } } + // Section 1.3: Public interface functions for working with immutable file pages. + + pub fn read_immutable_buf(&self, file_id: u64, blkno: u32) -> ReadBufResult { + let mut cache_key = CacheKey::ImmutableFilePage { file_id, blkno }; + + self.lock_for_read(&mut cache_key) + } + + /// Immediately drop all buffers belonging to given file, without writeback + pub fn drop_buffers_for_immutable(&self, drop_file_id: u64) { + for slot_idx in 0..self.slots.len() { + let slot = &self.slots[slot_idx]; + + let mut inner = slot.inner.write().unwrap(); + if let Some(key) = &inner.key { + match key { + CacheKey::ImmutableFilePage { file_id, blkno: _ } + if *file_id == drop_file_id => + { + // remove mapping for old buffer + self.remove_mapping(key); + inner.key = None; + inner.dirty = false; + } + _ => {} + } + } + } + } + // // Section 2: Internal interface functions for lookup/update. // @@ -578,6 +627,10 @@ impl PageCache { let map = self.ephemeral_page_map.read().unwrap(); Some(*map.get(&(*file_id, *blkno))?) } + CacheKey::ImmutableFilePage { file_id, blkno } => { + let map = self.immutable_page_map.read().unwrap(); + Some(*map.get(&(*file_id, *blkno))?) + } } } @@ -601,6 +654,10 @@ impl PageCache { let map = self.ephemeral_page_map.read().unwrap(); Some(*map.get(&(*file_id, *blkno))?) } + CacheKey::ImmutableFilePage { file_id, blkno } => { + let map = self.immutable_page_map.read().unwrap(); + Some(*map.get(&(*file_id, *blkno))?) + } } } @@ -632,6 +689,11 @@ impl PageCache { map.remove(&(*file_id, *blkno)) .expect("could not find old key in mapping"); } + CacheKey::ImmutableFilePage { file_id, blkno } => { + let mut map = self.immutable_page_map.write().unwrap(); + map.remove(&(*file_id, *blkno)) + .expect("could not find old key in mapping"); + } } } @@ -672,6 +734,16 @@ impl PageCache { } } } + CacheKey::ImmutableFilePage { file_id, blkno } => { + let mut map = self.immutable_page_map.write().unwrap(); + match map.entry((*file_id, *blkno)) { + Entry::Occupied(entry) => Some(*entry.get()), + Entry::Vacant(entry) => { + entry.insert(slot_idx); + None + } + } + } } } @@ -749,6 +821,13 @@ impl PageCache { CacheKey::EphemeralPage { file_id, blkno } => { writeback_ephemeral_file(*file_id, *blkno, buf) } + CacheKey::ImmutableFilePage { + file_id: _, + blkno: _, + } => Err(std::io::Error::new( + std::io::ErrorKind::Other, + "unexpected dirty immutable page", + )), } } @@ -779,6 +858,7 @@ impl PageCache { Self { materialized_page_map: Default::default(), ephemeral_page_map: Default::default(), + immutable_page_map: Default::default(), slots, next_evict_slot: AtomicUsize::new(0), } diff --git a/pageserver/src/virtual_file.rs b/pageserver/src/virtual_file.rs index 858cff29cb..64f9db2338 100644 --- a/pageserver/src/virtual_file.rs +++ b/pageserver/src/virtual_file.rs @@ -65,6 +65,7 @@ lazy_static! { /// currently open, the 'handle' can still point to the slot where it was last kept. The /// 'tag' field is used to detect whether the handle still is valid or not. /// +#[derive(Debug)] pub struct VirtualFile { /// Lazy handle to the global file descriptor cache. The slot that this points to /// might contain our File, or it may be empty, or it may contain a File that @@ -88,7 +89,7 @@ pub struct VirtualFile { timelineid: String, } -#[derive(PartialEq, Clone, Copy)] +#[derive(Debug, PartialEq, Clone, Copy)] struct SlotHandle { /// Index into OPEN_FILES.slots index: usize, From c4b57e4b8fb55360bdb77cc9165be8fc31b0b469 Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Thu, 7 Apr 2022 20:50:12 +0300 Subject: [PATCH 76/83] Move BlobRef It's not needed in image layers anymore, so move it into delta_layer.rs --- pageserver/src/layered_repository/blob_io.rs | 17 ++++++++++ pageserver/src/layered_repository/block_io.rs | 2 -- .../src/layered_repository/delta_layer.rs | 32 ++++++++++++++++++- .../src/layered_repository/image_layer.rs | 21 ++++++------ .../src/layered_repository/storage_layer.rs | 31 ------------------ 5 files changed, 57 insertions(+), 46 deletions(-) diff --git a/pageserver/src/layered_repository/blob_io.rs b/pageserver/src/layered_repository/blob_io.rs index 10bfea934d..aa90bbd0cf 100644 --- a/pageserver/src/layered_repository/blob_io.rs +++ b/pageserver/src/layered_repository/blob_io.rs @@ -10,12 +10,15 @@ use std::io::Error; /// For reading pub trait BlobCursor { + /// Read a blob into a new buffer. fn read_blob(&mut self, offset: u64) -> Result, std::io::Error> { let mut buf = Vec::new(); self.read_blob_into_buf(offset, &mut buf)?; Ok(buf) } + /// Read blob into the given buffer. Any previous contents in the buffer + /// are overwritten. fn read_blob_into_buf( &mut self, offset: u64, @@ -75,10 +78,19 @@ where } } +/// +/// Abstract trait for a data sink that you can write blobs to. +/// pub trait BlobWriter { + /// Write a blob of data. Returns the offset that it was written to, + /// which can be used to retrieve the data later. fn write_blob(&mut self, srcbuf: &[u8]) -> Result; } +/// +/// An implementation of BlobWriter to write blobs to anything that +/// implements std::io::Write. +/// pub struct WriteBlobWriter where W: std::io::Write, @@ -102,6 +114,11 @@ where self.offset } + /// Access the underlying Write object. + /// + /// NOTE: WriteBlobWriter keeps track of the current write offset. If + /// you write something directly to the inner Write object, it makes the + /// internally tracked 'offset' to go out of sync. So don't do that. pub fn into_inner(self) -> W { self.inner } diff --git a/pageserver/src/layered_repository/block_io.rs b/pageserver/src/layered_repository/block_io.rs index 2b8e31e1ee..a8992a6cb5 100644 --- a/pageserver/src/layered_repository/block_io.rs +++ b/pageserver/src/layered_repository/block_io.rs @@ -1,8 +1,6 @@ //! //! Low-level Block-oriented I/O functions //! -//! -//! use crate::page_cache; use crate::page_cache::{ReadBufResult, PAGE_SZ}; diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs index f8828b541f..43122fd99d 100644 --- a/pageserver/src/layered_repository/delta_layer.rs +++ b/pageserver/src/layered_repository/delta_layer.rs @@ -35,7 +35,7 @@ use crate::layered_repository::blob_io::{BlobCursor, BlobWriter, WriteBlobWriter use crate::layered_repository::block_io::{BlockCursor, BlockReader, FileBlockReader}; use crate::layered_repository::filename::{DeltaFileName, PathOrConf}; use crate::layered_repository::storage_layer::{ - BlobRef, Layer, ValueReconstructResult, ValueReconstructState, + Layer, ValueReconstructResult, ValueReconstructState, }; use crate::page_cache::{PageReadGuard, PAGE_SZ}; use crate::repository::{Key, Value}; @@ -93,6 +93,36 @@ impl From<&DeltaLayer> for Summary { } } +// Flag indicating that this version initialize the page +const WILL_INIT: u64 = 1; + +/// +/// Struct representing reference to BLOB in layers. Reference contains BLOB +/// offset, and for WAL records it also contains `will_init` flag. The flag +/// helps to determine the range of records that needs to be applied, without +/// reading/deserializing records themselves. +/// +#[derive(Debug, Serialize, Deserialize, Copy, Clone)] +struct BlobRef(u64); + +impl BlobRef { + pub fn will_init(&self) -> bool { + (self.0 & WILL_INIT) != 0 + } + + pub fn pos(&self) -> u64 { + self.0 >> 1 + } + + pub fn new(pos: u64, will_init: bool) -> BlobRef { + let mut blob_ref = pos << 1; + if will_init { + blob_ref |= WILL_INIT; + } + BlobRef(blob_ref) + } +} + /// /// DeltaLayer is the in-memory data structure associated with an /// on-disk delta file. We keep a DeltaLayer in memory for each diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs index a8e5de09f5..d0afce1549 100644 --- a/pageserver/src/layered_repository/image_layer.rs +++ b/pageserver/src/layered_repository/image_layer.rs @@ -28,7 +28,7 @@ use crate::layered_repository::blob_io::{BlobCursor, BlobWriter, WriteBlobWriter use crate::layered_repository::block_io::{BlockReader, FileBlockReader}; use crate::layered_repository::filename::{ImageFileName, PathOrConf}; use crate::layered_repository::storage_layer::{ - BlobRef, Layer, ValueReconstructResult, ValueReconstructState, + Layer, ValueReconstructResult, ValueReconstructState, }; use crate::page_cache::PAGE_SZ; use crate::repository::{Key, Value}; @@ -105,7 +105,7 @@ pub struct ImageLayerInner { loaded: bool, /// offset of each value - index: HashMap, + index: HashMap, // values copied from summary index_start_blk: u32, @@ -147,18 +147,18 @@ impl Layer for ImageLayer { assert!(lsn_range.end >= self.lsn); let inner = self.load()?; - if let Some(blob_ref) = inner.index.get(&key) { + if let Some(&offset) = inner.index.get(&key) { let buf = inner .file .as_ref() .unwrap() .block_cursor() - .read_blob(blob_ref.pos()) + .read_blob(offset) .with_context(|| { format!( "failed to read blob from data file {} at offset {}", self.filename().display(), - blob_ref.pos() + offset ) })?; let value = Bytes::from(buf); @@ -228,11 +228,8 @@ impl Layer for ImageLayer { let inner = self.load()?; - let mut index_vec: Vec<(&Key, &BlobRef)> = inner.index.iter().collect(); - index_vec.sort_by_key(|x| x.1.pos()); - - for (key, blob_ref) in index_vec { - println!("key: {} offset {}", key, blob_ref.pos()); + for (key, offset) in inner.index.iter() { + println!("key: {} offset {}", key, offset); } Ok(()) @@ -423,7 +420,7 @@ pub struct ImageLayerWriter { key_range: Range, lsn: Lsn, - index: HashMap, + index: HashMap, blob_writer: WriteBlobWriter, } @@ -476,7 +473,7 @@ impl ImageLayerWriter { ensure!(self.key_range.contains(&key)); let off = self.blob_writer.write_blob(img)?; - let old = self.index.insert(key, BlobRef::new(off, true)); + let old = self.index.insert(key, off); assert!(old.is_none()); Ok(()) diff --git a/pageserver/src/layered_repository/storage_layer.rs b/pageserver/src/layered_repository/storage_layer.rs index b5366da223..5ad43182f6 100644 --- a/pageserver/src/layered_repository/storage_layer.rs +++ b/pageserver/src/layered_repository/storage_layer.rs @@ -7,7 +7,6 @@ use crate::walrecord::ZenithWalRecord; use crate::{ZTenantId, ZTimelineId}; use anyhow::Result; use bytes::Bytes; -use serde::{Deserialize, Serialize}; use std::ops::Range; use std::path::PathBuf; @@ -145,33 +144,3 @@ pub trait Layer: Send + Sync { /// Dump summary of the contents of the layer to stdout fn dump(&self, verbose: bool) -> Result<()>; } - -// Flag indicating that this version initialize the page -const WILL_INIT: u64 = 1; - -/// -/// Struct representing reference to BLOB in layers. Reference contains BLOB -/// offset, and for WAL records it also contains `will_init` flag. The flag -/// helps to determine the range of records that needs to be applied, without -/// reading/deserializing records themselves. -/// -#[derive(Debug, Serialize, Deserialize, Copy, Clone)] -pub struct BlobRef(u64); - -impl BlobRef { - pub fn will_init(&self) -> bool { - (self.0 & WILL_INIT) != 0 - } - - pub fn pos(&self) -> u64 { - self.0 >> 1 - } - - pub fn new(pos: u64, will_init: bool) -> BlobRef { - let mut blob_ref = pos << 1; - if will_init { - blob_ref |= WILL_INIT; - } - BlobRef(blob_ref) - } -} From 214567bf8fafed56cd867698d9e54fafc7001b45 Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Thu, 7 Apr 2022 20:50:16 +0300 Subject: [PATCH 77/83] Use B-tree for the index in image and delta layers. We now use a page cache for those, instead of slurping the whole index into memory. Fixes https://github.com/zenithdb/zenith/issues/1356 This is a backwards-incompatible change to the storage format, so bump STORAGE_FORMAT_VERSION. --- Cargo.lock | 1 + pageserver/Cargo.toml | 1 + pageserver/src/layered_repository.rs | 10 +- pageserver/src/layered_repository/block_io.rs | 45 + .../src/layered_repository/delta_layer.rs | 290 ++- .../src/layered_repository/disk_btree.rs | 979 ++++++++ .../disk_btree_test_data.rs | 2013 +++++++++++++++++ .../src/layered_repository/image_layer.rs | 144 +- .../src/layered_repository/inmemory_layer.rs | 7 - .../src/layered_repository/storage_layer.rs | 4 - pageserver/src/lib.rs | 2 +- pageserver/src/repository.rs | 16 +- 12 files changed, 3287 insertions(+), 225 deletions(-) create mode 100644 pageserver/src/layered_repository/disk_btree.rs create mode 100644 pageserver/src/layered_repository/disk_btree_test_data.rs diff --git a/Cargo.lock b/Cargo.lock index e0b6288f63..19ccd18a10 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -1499,6 +1499,7 @@ dependencies = [ "daemonize", "fail", "futures", + "hex", "hex-literal", "humantime", "hyper", diff --git a/pageserver/Cargo.toml b/pageserver/Cargo.toml index a5283cb331..4d79811bfb 100644 --- a/pageserver/Cargo.toml +++ b/pageserver/Cargo.toml @@ -10,6 +10,7 @@ regex = "1.4.5" bytes = { version = "1.0.1", features = ['serde'] } byteorder = "1.4.3" futures = "0.3.13" +hex = "0.4.3" hyper = "0.14" itertools = "0.10.3" lazy_static = "1.4.0" diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index 5adf4a89ff..d7a250f31e 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -58,6 +58,7 @@ use zenith_utils::seqwait::SeqWait; mod blob_io; pub mod block_io; mod delta_layer; +mod disk_btree; pub(crate) mod ephemeral_file; mod filename; mod image_layer; @@ -1602,15 +1603,6 @@ impl LayeredTimeline { debug!("Could not compact because no partitioning specified yet"); } - // Call unload() on all frozen layers, to release memory. - // This shouldn't be much memory, as only metadata is slurped - // into memory. - let layers = self.layers.lock().unwrap(); - for layer in layers.iter_historic_layers() { - layer.unload()?; - } - drop(layers); - Ok(()) } diff --git a/pageserver/src/layered_repository/block_io.rs b/pageserver/src/layered_repository/block_io.rs index a8992a6cb5..2eba0aa403 100644 --- a/pageserver/src/layered_repository/block_io.rs +++ b/pageserver/src/layered_repository/block_io.rs @@ -4,6 +4,7 @@ use crate::page_cache; use crate::page_cache::{ReadBufResult, PAGE_SZ}; +use bytes::Bytes; use lazy_static::lazy_static; use std::ops::{Deref, DerefMut}; use std::os::unix::fs::FileExt; @@ -172,3 +173,47 @@ where } } } + +/// +/// Trait for block-oriented output +/// +pub trait BlockWriter { + /// + /// Write a page to the underlying storage. + /// + /// 'buf' must be of size PAGE_SZ. Returns the block number the page was + /// written to. + /// + fn write_blk(&mut self, buf: Bytes) -> Result; +} + +/// +/// A simple in-memory buffer of blocks. +/// +pub struct BlockBuf { + pub blocks: Vec, +} +impl BlockWriter for BlockBuf { + fn write_blk(&mut self, buf: Bytes) -> Result { + assert!(buf.len() == PAGE_SZ); + let blknum = self.blocks.len(); + self.blocks.push(buf); + tracing::info!("buffered block {}", blknum); + Ok(blknum as u32) + } +} + +impl BlockBuf { + pub fn new() -> Self { + BlockBuf { blocks: Vec::new() } + } + + pub fn size(&self) -> u64 { + (self.blocks.len() * PAGE_SZ) as u64 + } +} +impl Default for BlockBuf { + fn default() -> Self { + Self::new() + } +} diff --git a/pageserver/src/layered_repository/delta_layer.rs b/pageserver/src/layered_repository/delta_layer.rs index 43122fd99d..dd6b5d3afa 100644 --- a/pageserver/src/layered_repository/delta_layer.rs +++ b/pageserver/src/layered_repository/delta_layer.rs @@ -7,14 +7,8 @@ //! must be page images or WAL records with the 'will_init' flag set, so that //! they can be replayed without referring to an older page version. //! -//! When a delta file needs to be accessed, we slurp the 'index' metadata -//! into memory, into the DeltaLayerInner struct. See load() and unload() functions. -//! To access a particular value, we search `index` for the given key. -//! The byte offset in the index can be used to find the value in -//! VALUES_CHAPTER. -//! -//! On disk, the delta files are stored in timelines/ directory. -//! Currently, there are no subdirectories, and each delta file is named like this: +//! The delta files are stored in timelines/ directory. Currently, +//! there are no subdirectories, and each delta file is named like this: //! //! -__- for Summary { @@ -89,6 +89,7 @@ impl From<&DeltaLayer> for Summary { lsn_range: layer.lsn_range.clone(), index_start_blk: 0, + index_root_blk: 0, } } } @@ -123,6 +124,46 @@ impl BlobRef { } } +const DELTA_KEY_SIZE: usize = KEY_SIZE + 8; +struct DeltaKey([u8; DELTA_KEY_SIZE]); + +/// +/// This is the key of the B-tree index stored in the delta layer. It consists +/// of the serialized representation of a Key and LSN. +/// +impl DeltaKey { + fn from_slice(buf: &[u8]) -> Self { + let mut bytes: [u8; DELTA_KEY_SIZE] = [0u8; DELTA_KEY_SIZE]; + bytes.copy_from_slice(buf); + DeltaKey(bytes) + } + + fn from_key_lsn(key: &Key, lsn: Lsn) -> Self { + let mut bytes: [u8; DELTA_KEY_SIZE] = [0u8; DELTA_KEY_SIZE]; + key.write_to_byte_slice(&mut bytes[0..KEY_SIZE]); + bytes[KEY_SIZE..].copy_from_slice(&u64::to_be_bytes(lsn.0)); + DeltaKey(bytes) + } + + fn key(&self) -> Key { + Key::from_slice(&self.0) + } + + fn lsn(&self) -> Lsn { + Lsn(u64::from_be_bytes(self.0[KEY_SIZE..].try_into().unwrap())) + } + + fn extract_key_from_buf(buf: &[u8]) -> Key { + Key::from_slice(&buf[..KEY_SIZE]) + } + + fn extract_lsn_from_buf(buf: &[u8]) -> Lsn { + let mut lsn_buf = [0u8; 8]; + lsn_buf.copy_from_slice(&buf[KEY_SIZE..]); + Lsn(u64::from_be_bytes(lsn_buf)) + } +} + /// /// DeltaLayer is the in-memory data structure associated with an /// on-disk delta file. We keep a DeltaLayer in memory for each @@ -143,18 +184,12 @@ pub struct DeltaLayer { } pub struct DeltaLayerInner { - /// If false, the 'index' has not been loaded into memory yet. + /// If false, the fields below have not been loaded into memory yet. loaded: bool, - /// - /// All versions of all pages in the layer are kept here. - /// Indexed by block number and LSN. The value is an offset into the - /// chapter where the page version is stored. - /// - index: HashMap>, - // values copied from summary index_start_blk: u32, + index_root_blk: u32, /// Reader object for reading blocks from the file. (None if not loaded yet) file: Option>, @@ -196,27 +231,46 @@ impl Layer for DeltaLayer { let inner = self.load()?; // Scan the page versions backwards, starting from `lsn`. - if let Some(vec_map) = inner.index.get(&key) { - let mut reader = inner.file.as_ref().unwrap().block_cursor(); - let slice = vec_map.slice_range(lsn_range); - for (entry_lsn, blob_ref) in slice.iter().rev() { - let buf = reader.read_blob(blob_ref.pos())?; - let val = Value::des(&buf)?; - match val { - Value::Image(img) => { - reconstruct_state.img = Some((*entry_lsn, img)); + let file = inner.file.as_ref().unwrap(); + let tree_reader = DiskBtreeReader::<_, DELTA_KEY_SIZE>::new( + inner.index_start_blk, + inner.index_root_blk, + file, + ); + let search_key = DeltaKey::from_key_lsn(&key, Lsn(lsn_range.end.0 - 1)); + + let mut offsets: Vec<(Lsn, u64)> = Vec::new(); + + tree_reader.visit(&search_key.0, VisitDirection::Backwards, |key, value| { + let blob_ref = BlobRef(value); + if key[..KEY_SIZE] != search_key.0[..KEY_SIZE] { + return false; + } + let entry_lsn = DeltaKey::extract_lsn_from_buf(key); + offsets.push((entry_lsn, blob_ref.pos())); + + !blob_ref.will_init() + })?; + + // Ok, 'offsets' now contains the offsets of all the entries we need to read + let mut cursor = file.block_cursor(); + for (entry_lsn, pos) in offsets { + let buf = cursor.read_blob(pos)?; + let val = Value::des(&buf)?; + match val { + Value::Image(img) => { + reconstruct_state.img = Some((entry_lsn, img)); + need_image = false; + break; + } + Value::WalRecord(rec) => { + let will_init = rec.will_init(); + reconstruct_state.records.push((entry_lsn, rec)); + if will_init { + // This WAL record initializes the page, so no need to go further back need_image = false; break; } - Value::WalRecord(rec) => { - let will_init = rec.will_init(); - reconstruct_state.records.push((*entry_lsn, rec)); - if will_init { - // This WAL record initializes the page, so no need to go further back - need_image = false; - break; - } - } } } } @@ -241,36 +295,6 @@ impl Layer for DeltaLayer { } } - /// - /// Release most of the memory used by this layer. If it's accessed again later, - /// it will need to be loaded back. - /// - fn unload(&self) -> Result<()> { - // FIXME: In debug mode, loading and unloading the index slows - // things down so much that you get timeout errors. At least - // with the test_parallel_copy test. So as an even more ad hoc - // stopgap fix for that, only unload every on average 10 - // checkpoint cycles. - use rand::RngCore; - if rand::thread_rng().next_u32() > (u32::MAX / 10) { - return Ok(()); - } - - let mut inner = match self.inner.try_write() { - Ok(inner) => inner, - Err(TryLockError::WouldBlock) => return Ok(()), - Err(TryLockError::Poisoned(_)) => panic!("DeltaLayer lock was poisoned"), - }; - inner.index = HashMap::default(); - inner.loaded = false; - - // Note: we keep the Book open. Is that a good idea? The virtual file - // machinery has its own rules for closing the file descriptor if it's not - // needed, but the Book struct uses up some memory, too. - - Ok(()) - } - fn delete(&self) -> Result<()> { // delete underlying file fs::remove_file(self.path())?; @@ -303,21 +327,36 @@ impl Layer for DeltaLayer { let inner = self.load()?; - let mut values: Vec<(&Key, &VecMap)> = inner.index.iter().collect(); - values.sort_by_key(|k| k.0); + println!( + "index_start_blk: {}, root {}", + inner.index_start_blk, inner.index_root_blk + ); - let mut reader = inner.file.as_ref().unwrap().block_cursor(); + let file = inner.file.as_ref().unwrap(); + let tree_reader = DiskBtreeReader::<_, DELTA_KEY_SIZE>::new( + inner.index_start_blk, + inner.index_root_blk, + file, + ); + + tree_reader.dump()?; + + let mut cursor = file.block_cursor(); + tree_reader.visit( + &[0u8; DELTA_KEY_SIZE], + VisitDirection::Forwards, + |delta_key, val| { + let blob_ref = BlobRef(val); + let key = DeltaKey::extract_key_from_buf(delta_key); + let lsn = DeltaKey::extract_lsn_from_buf(delta_key); - for (key, versions) in values { - for (lsn, blob_ref) in versions.as_slice() { let mut desc = String::new(); - match reader.read_blob(blob_ref.pos()) { + match cursor.read_blob(blob_ref.pos()) { Ok(buf) => { let val = Value::des(&buf); - match val { Ok(Value::Image(img)) => { - write!(&mut desc, " img {} bytes", img.len())?; + write!(&mut desc, " img {} bytes", img.len()).unwrap(); } Ok(Value::WalRecord(rec)) => { let wal_desc = walrecord::describe_wal_record(&rec); @@ -327,20 +366,22 @@ impl Layer for DeltaLayer { buf.len(), rec.will_init(), wal_desc - )?; + ) + .unwrap(); } Err(err) => { - write!(&mut desc, " DESERIALIZATION ERROR: {}", err)?; + write!(&mut desc, " DESERIALIZATION ERROR: {}", err).unwrap(); } } } Err(err) => { - write!(&mut desc, " READ ERROR: {}", err)?; + write!(&mut desc, " READ ERROR: {}", err).unwrap(); } } println!(" key {} at {}: {}", key, lsn, desc); - } - } + true + }, + )?; Ok(()) } @@ -409,6 +450,7 @@ impl DeltaLayer { PathOrConf::Conf(_) => { let mut expected_summary = Summary::from(self); expected_summary.index_start_blk = actual_summary.index_start_blk; + expected_summary.index_root_blk = actual_summary.index_root_blk; if actual_summary != expected_summary { bail!("in-file summary does not match expected summary. actual = {:?} expected = {:?}", actual_summary, expected_summary); } @@ -427,17 +469,11 @@ impl DeltaLayer { } } - file.file.seek(SeekFrom::Start( - actual_summary.index_start_blk as u64 * PAGE_SZ as u64, - ))?; - let mut buf_reader = std::io::BufReader::new(&mut file.file); - let index = HashMap::des_from(&mut buf_reader)?; - inner.index_start_blk = actual_summary.index_start_blk; + inner.index_root_blk = actual_summary.index_root_blk; debug!("loaded from {}", &path.display()); - inner.index = index; inner.loaded = true; Ok(()) } @@ -457,9 +493,9 @@ impl DeltaLayer { lsn_range: filename.lsn_range.clone(), inner: RwLock::new(DeltaLayerInner { loaded: false, - index: HashMap::default(), file: None, index_start_blk: 0, + index_root_blk: 0, }), } } @@ -485,8 +521,8 @@ impl DeltaLayer { inner: RwLock::new(DeltaLayerInner { loaded: false, file: None, - index: HashMap::default(), index_start_blk: 0, + index_root_blk: 0, }), }) } @@ -529,7 +565,7 @@ pub struct DeltaLayerWriter { key_start: Key, lsn_range: Range, - index: HashMap>, + tree: DiskBtreeBuilder, blob_writer: WriteBlobWriter>, } @@ -558,10 +594,15 @@ impl DeltaLayerWriter { u64::from(lsn_range.end) )); let mut file = VirtualFile::create(&path)?; + // make room for the header block file.seek(SeekFrom::Start(PAGE_SZ as u64))?; let buf_writer = BufWriter::new(file); let blob_writer = WriteBlobWriter::new(buf_writer, PAGE_SZ as u64); + // Initialize the b-tree index builder + let block_buf = BlockBuf::new(); + let tree_builder = DiskBtreeBuilder::new(block_buf); + Ok(DeltaLayerWriter { conf, path, @@ -569,7 +610,7 @@ impl DeltaLayerWriter { tenantid, key_start, lsn_range, - index: HashMap::new(), + tree: tree_builder, blob_writer, }) } @@ -584,23 +625,16 @@ impl DeltaLayerWriter { let off = self.blob_writer.write_blob(&Value::ser(&val)?)?; - let vec_map = self.index.entry(key).or_default(); let blob_ref = BlobRef::new(off, val.will_init()); - let old = vec_map.append_or_update_last(lsn, blob_ref).unwrap().0; - if old.is_some() { - // We already had an entry for this LSN. That's odd.. - bail!( - "Value for {} at {} already exists in delta layer being built", - key, - lsn - ); - } + + let delta_key = DeltaKey::from_key_lsn(&key, lsn); + self.tree.append(&delta_key.0, blob_ref.0)?; Ok(()) } pub fn size(&self) -> u64 { - self.blob_writer.size() + self.blob_writer.size() + self.tree.borrow_writer().size() } /// @@ -614,9 +648,11 @@ impl DeltaLayerWriter { let mut file = buf_writer.into_inner()?; // Write out the index - let buf = HashMap::ser(&self.index)?; + let (index_root_blk, block_buf) = self.tree.finish()?; file.seek(SeekFrom::Start(index_start_blk as u64 * PAGE_SZ as u64))?; - file.write_all(&buf)?; + for buf in block_buf.blocks { + file.write_all(buf.as_ref())?; + } // Fill in the summary on blk 0 let summary = Summary { @@ -627,6 +663,7 @@ impl DeltaLayerWriter { key_range: self.key_start..key_end, lsn_range: self.lsn_range.clone(), index_start_blk, + index_root_blk, }; file.seek(SeekFrom::Start(0))?; Summary::ser_into(&summary, &mut file)?; @@ -642,9 +679,9 @@ impl DeltaLayerWriter { lsn_range: self.lsn_range.clone(), inner: RwLock::new(DeltaLayerInner { loaded: false, - index: HashMap::new(), file: None, index_start_blk, + index_root_blk, }), }; @@ -677,7 +714,7 @@ impl DeltaLayerWriter { /// fashion. /// struct DeltaValueIter<'a> { - all_offsets: Vec<(Key, Lsn, BlobRef)>, + all_offsets: Vec<(DeltaKey, BlobRef)>, next_idx: usize, reader: BlockCursor>, } @@ -702,15 +739,22 @@ impl<'a> Iterator for DeltaValueIter<'a> { impl<'a> DeltaValueIter<'a> { fn new(inner: RwLockReadGuard<'a, DeltaLayerInner>) -> Result { - let mut index: Vec<(&Key, &VecMap)> = inner.index.iter().collect(); - index.sort_by_key(|x| x.0); + let file = inner.file.as_ref().unwrap(); + let tree_reader = DiskBtreeReader::<_, DELTA_KEY_SIZE>::new( + inner.index_start_blk, + inner.index_root_blk, + file, + ); - let mut all_offsets: Vec<(Key, Lsn, BlobRef)> = Vec::new(); - for (key, vec_map) in index.iter() { - for (lsn, blob_ref) in vec_map.as_slice().iter() { - all_offsets.push((**key, *lsn, *blob_ref)); - } - } + let mut all_offsets: Vec<(DeltaKey, BlobRef)> = Vec::new(); + tree_reader.visit( + &[0u8; DELTA_KEY_SIZE], + VisitDirection::Forwards, + |key, value| { + all_offsets.push((DeltaKey::from_slice(key), BlobRef(value))); + true + }, + )?; let iter = DeltaValueIter { all_offsets, @@ -723,13 +767,15 @@ impl<'a> DeltaValueIter<'a> { fn next_res(&mut self) -> Result> { if self.next_idx < self.all_offsets.len() { - let (key, lsn, off) = &self.all_offsets[self.next_idx]; + let (delta_key, blob_ref) = &self.all_offsets[self.next_idx]; - //let mut reader = BlobReader::new(self.inner.file.as_ref().unwrap()); - let buf = self.reader.read_blob(off.pos())?; + let key = delta_key.key(); + let lsn = delta_key.lsn(); + + let buf = self.reader.read_blob(blob_ref.pos())?; let val = Value::des(&buf)?; self.next_idx += 1; - Ok(Some((*key, *lsn, val))) + Ok(Some((key, lsn, val))) } else { Ok(None) } diff --git a/pageserver/src/layered_repository/disk_btree.rs b/pageserver/src/layered_repository/disk_btree.rs new file mode 100644 index 0000000000..7a9fe6f2b7 --- /dev/null +++ b/pageserver/src/layered_repository/disk_btree.rs @@ -0,0 +1,979 @@ +//! +//! Simple on-disk B-tree implementation +//! +//! This is used as the index structure within image and delta layers +//! +//! Features: +//! - Fixed-width keys +//! - Fixed-width values (VALUE_SZ) +//! - The tree is created in a bulk operation. Insert/deletion after creation +//! is not suppported +//! - page-oriented +//! +//! TODO: +//! - better errors (e.g. with thiserror?) +//! - maybe something like an Adaptive Radix Tree would be more efficient? +//! - the values stored by image and delta layers are offsets into the file, +//! and they are in monotonically increasing order. Prefix compression would +//! be very useful for them, too. +//! - An Iterator interface would be more convenient for the callers than the +//! 'visit' function +//! +use anyhow; +use byteorder::{ReadBytesExt, BE}; +use bytes::{BufMut, Bytes, BytesMut}; +use hex; +use std::cmp::Ordering; + +use crate::layered_repository::block_io::{BlockReader, BlockWriter}; + +// The maximum size of a value stored in the B-tree. 5 bytes is enough currently. +pub const VALUE_SZ: usize = 5; +pub const MAX_VALUE: u64 = 0x007f_ffff_ffff; + +#[allow(dead_code)] +pub const PAGE_SZ: usize = 8192; + +#[derive(Clone, Copy, Debug)] +struct Value([u8; VALUE_SZ]); + +impl Value { + fn from_slice(slice: &[u8]) -> Value { + let mut b = [0u8; VALUE_SZ]; + b.copy_from_slice(slice); + Value(b) + } + + fn from_u64(x: u64) -> Value { + assert!(x <= 0x007f_ffff_ffff); + Value([ + (x >> 32) as u8, + (x >> 24) as u8, + (x >> 16) as u8, + (x >> 8) as u8, + x as u8, + ]) + } + + fn from_blknum(x: u32) -> Value { + Value([ + 0x80, + (x >> 24) as u8, + (x >> 16) as u8, + (x >> 8) as u8, + x as u8, + ]) + } + + #[allow(dead_code)] + fn is_offset(self) -> bool { + self.0[0] & 0x80 != 0 + } + + fn to_u64(self) -> u64 { + let b = &self.0; + (b[0] as u64) << 32 + | (b[1] as u64) << 24 + | (b[2] as u64) << 16 + | (b[3] as u64) << 8 + | b[4] as u64 + } + + fn to_blknum(self) -> u32 { + let b = &self.0; + assert!(b[0] == 0x80); + (b[1] as u32) << 24 | (b[2] as u32) << 16 | (b[3] as u32) << 8 | b[4] as u32 + } +} + +/// This is the on-disk representation. +struct OnDiskNode<'a, const L: usize> { + // Fixed-width fields + num_children: u16, + level: u8, + prefix_len: u8, + suffix_len: u8, + + // Variable-length fields. These are stored on-disk after the fixed-width + // fields, in this order. In the in-memory representation, these point to + // the right parts in the page buffer. + prefix: &'a [u8], + keys: &'a [u8], + values: &'a [u8], +} + +impl<'a, const L: usize> OnDiskNode<'a, L> { + /// + /// Interpret a PAGE_SZ page as a node. + /// + fn deparse(buf: &[u8]) -> OnDiskNode { + let mut cursor = std::io::Cursor::new(buf); + let num_children = cursor.read_u16::().unwrap(); + let level = cursor.read_u8().unwrap(); + let prefix_len = cursor.read_u8().unwrap(); + let suffix_len = cursor.read_u8().unwrap(); + + let mut off = cursor.position(); + let prefix_off = off as usize; + off += prefix_len as u64; + + let keys_off = off as usize; + let keys_len = num_children as usize * suffix_len as usize; + off += keys_len as u64; + + let values_off = off as usize; + let values_len = num_children as usize * VALUE_SZ as usize; + //off += values_len as u64; + + let prefix = &buf[prefix_off..prefix_off + prefix_len as usize]; + let keys = &buf[keys_off..keys_off + keys_len]; + let values = &buf[values_off..values_off + values_len]; + + OnDiskNode { + num_children, + level, + prefix_len, + suffix_len, + prefix, + keys, + values, + } + } + + /// + /// Read a value at 'idx' + /// + fn value(&self, idx: usize) -> Value { + let value_off = idx * VALUE_SZ; + let value_slice = &self.values[value_off..value_off + VALUE_SZ]; + Value::from_slice(value_slice) + } + + fn binary_search(&self, search_key: &[u8; L], keybuf: &mut [u8]) -> Result { + let mut size = self.num_children as usize; + let mut low = 0; + let mut high = size; + while low < high { + let mid = low + size / 2; + + let key_off = mid as usize * self.suffix_len as usize; + let suffix = &self.keys[key_off..key_off + self.suffix_len as usize]; + // Does this match? + keybuf[self.prefix_len as usize..].copy_from_slice(suffix); + + let cmp = keybuf[..].cmp(search_key); + + if cmp == Ordering::Less { + low = mid + 1; + } else if cmp == Ordering::Greater { + high = mid; + } else { + return Ok(mid); + } + size = high - low; + } + Err(low) + } +} + +/// +/// Public reader object, to search the tree. +/// +pub struct DiskBtreeReader +where + R: BlockReader, +{ + start_blk: u32, + root_blk: u32, + reader: R, +} + +#[derive(Clone, Copy, Debug, PartialEq)] +pub enum VisitDirection { + Forwards, + Backwards, +} + +impl DiskBtreeReader +where + R: BlockReader, +{ + pub fn new(start_blk: u32, root_blk: u32, reader: R) -> Self { + DiskBtreeReader { + start_blk, + root_blk, + reader, + } + } + + /// + /// Read the value for given key. Returns the value, or None if it doesn't exist. + /// + pub fn get(&self, search_key: &[u8; L]) -> anyhow::Result> { + let mut result: Option = None; + self.visit(search_key, VisitDirection::Forwards, |key, value| { + if key == search_key { + result = Some(value); + } + false + })?; + Ok(result) + } + + /// + /// Scan the tree, starting from 'search_key', in the given direction. 'visitor' + /// will be called for every key >= 'search_key' (or <= 'search_key', if scanning + /// backwards) + /// + pub fn visit( + &self, + search_key: &[u8; L], + dir: VisitDirection, + mut visitor: V, + ) -> anyhow::Result + where + V: FnMut(&[u8], u64) -> bool, + { + self.search_recurse(self.root_blk, search_key, dir, &mut visitor) + } + + fn search_recurse( + &self, + node_blknum: u32, + search_key: &[u8; L], + dir: VisitDirection, + visitor: &mut V, + ) -> anyhow::Result + where + V: FnMut(&[u8], u64) -> bool, + { + // Locate the node. + let blk = self.reader.read_blk(self.start_blk + node_blknum)?; + + // Search all entries on this node + self.search_node(blk.as_ref(), search_key, dir, visitor) + } + + fn search_node( + &self, + node_buf: &[u8], + search_key: &[u8; L], + dir: VisitDirection, + visitor: &mut V, + ) -> anyhow::Result + where + V: FnMut(&[u8], u64) -> bool, + { + let node = OnDiskNode::deparse(node_buf); + let prefix_len = node.prefix_len as usize; + let suffix_len = node.suffix_len as usize; + + assert!(node.num_children > 0); + + let mut keybuf = Vec::new(); + keybuf.extend(node.prefix); + keybuf.resize(prefix_len + suffix_len, 0); + + if dir == VisitDirection::Forwards { + // Locate the first match + let mut idx = match node.binary_search(search_key, keybuf.as_mut_slice()) { + Ok(idx) => idx, + Err(idx) => { + if node.level == 0 { + // Imagine that the node contains the following keys: + // + // 1 + // 3 <-- idx + // 5 + // + // If the search key is '2' and there is exact match, + // the binary search would return the index of key + // '3'. That's cool, '3' is the first key to return. + idx + } else { + // This is an internal page, so each key represents a lower + // bound for what's in the child page. If there is no exact + // match, we have to return the *previous* entry. + // + // 1 <-- return this + // 3 <-- idx + // 5 + idx.saturating_sub(1) + } + } + }; + // idx points to the first match now. Keep going from there + let mut key_off = idx * suffix_len; + while idx < node.num_children as usize { + let suffix = &node.keys[key_off..key_off + suffix_len]; + keybuf[prefix_len..].copy_from_slice(suffix); + let value = node.value(idx as usize); + #[allow(clippy::collapsible_if)] + if node.level == 0 { + // leaf + if !visitor(&keybuf, value.to_u64()) { + return Ok(false); + } + } else { + #[allow(clippy::collapsible_if)] + if !self.search_recurse(value.to_blknum(), search_key, dir, visitor)? { + return Ok(false); + } + } + idx += 1; + key_off += suffix_len; + } + } else { + let mut idx = match node.binary_search(search_key, keybuf.as_mut_slice()) { + Ok(idx) => { + // Exact match. That's the first entry to return, and walk + // backwards from there. (The loop below starts from 'idx - + // 1', so add one here to compensate.) + idx + 1 + } + Err(idx) => { + // No exact match. The binary search returned the index of the + // first key that's > search_key. Back off by one, and walk + // backwards from there. (The loop below starts from idx - 1, + // so we don't need to subtract one here) + idx + } + }; + + // idx points to the first match + 1 now. Keep going from there. + let mut key_off = idx * suffix_len; + while idx > 0 { + idx -= 1; + key_off -= suffix_len; + let suffix = &node.keys[key_off..key_off + suffix_len]; + keybuf[prefix_len..].copy_from_slice(suffix); + let value = node.value(idx as usize); + #[allow(clippy::collapsible_if)] + if node.level == 0 { + // leaf + if !visitor(&keybuf, value.to_u64()) { + return Ok(false); + } + } else { + #[allow(clippy::collapsible_if)] + if !self.search_recurse(value.to_blknum(), search_key, dir, visitor)? { + return Ok(false); + } + } + if idx == 0 { + break; + } + } + } + Ok(true) + } + + #[allow(dead_code)] + pub fn dump(&self) -> anyhow::Result<()> { + self.dump_recurse(self.root_blk, &[], 0) + } + + fn dump_recurse(&self, blknum: u32, path: &[u8], depth: usize) -> anyhow::Result<()> { + let blk = self.reader.read_blk(self.start_blk + blknum)?; + let buf: &[u8] = blk.as_ref(); + + let node = OnDiskNode::::deparse(buf); + + print!("{:indent$}", "", indent = depth * 2); + println!( + "blk #{}: path {}: prefix {}, suffix_len {}", + blknum, + hex::encode(path), + hex::encode(node.prefix), + node.suffix_len + ); + + let mut idx = 0; + let mut key_off = 0; + while idx < node.num_children { + let key = &node.keys[key_off..key_off + node.suffix_len as usize]; + let val = node.value(idx as usize); + print!("{:indent$}", "", indent = depth * 2 + 2); + println!("{}: {}", hex::encode(key), hex::encode(val.0)); + + if node.level > 0 { + let child_path = [path, node.prefix].concat(); + self.dump_recurse(val.to_blknum(), &child_path, depth + 1)?; + } + idx += 1; + key_off += node.suffix_len as usize; + } + Ok(()) + } +} + +/// +/// Public builder object, for creating a new tree. +/// +/// Usage: Create a builder object by calling 'new', load all the data into the +/// tree by calling 'append' for each key-value pair, and then call 'finish' +/// +/// 'L' is the key length in bytes +pub struct DiskBtreeBuilder +where + W: BlockWriter, +{ + writer: W, + + /// + /// stack[0] is the current root page, stack.last() is the leaf. + /// + stack: Vec>, + + /// Last key that was appended to the tree. Used to sanity check that append + /// is called in increasing key order. + last_key: Option<[u8; L]>, +} + +impl DiskBtreeBuilder +where + W: BlockWriter, +{ + pub fn new(writer: W) -> Self { + DiskBtreeBuilder { + writer, + last_key: None, + stack: vec![BuildNode::new(0)], + } + } + + pub fn append(&mut self, key: &[u8; L], value: u64) -> Result<(), anyhow::Error> { + assert!(value <= MAX_VALUE); + if let Some(last_key) = &self.last_key { + assert!(key > last_key, "unsorted input"); + } + self.last_key = Some(*key); + + Ok(self.append_internal(key, Value::from_u64(value))?) + } + + fn append_internal(&mut self, key: &[u8; L], value: Value) -> Result<(), std::io::Error> { + // Try to append to the current leaf buffer + let last = self.stack.last_mut().unwrap(); + let level = last.level; + if last.push(key, value) { + return Ok(()); + } + + // It did not fit. Try to compress, and it it succeeds to make some room + // on the node, try appending to it again. + #[allow(clippy::collapsible_if)] + if last.compress() { + if last.push(key, value) { + return Ok(()); + } + } + + // Could not append to the current leaf. Flush it and create a new one. + self.flush_node()?; + + // Replace the node we flushed with an empty one and append the new + // key to it. + let mut last = BuildNode::new(level); + if !last.push(key, value) { + panic!("could not push to new leaf node"); + } + self.stack.push(last); + + Ok(()) + } + + fn flush_node(&mut self) -> Result<(), std::io::Error> { + let last = self.stack.pop().unwrap(); + let buf = last.pack(); + let downlink_key = last.first_key(); + let downlink_ptr = self.writer.write_blk(buf)?; + + // Append the downlink to the parent + if self.stack.is_empty() { + self.stack.push(BuildNode::new(last.level + 1)); + } + self.append_internal(&downlink_key, Value::from_blknum(downlink_ptr))?; + + Ok(()) + } + + /// + /// Flushes everything to disk, and returns the block number of the root page. + /// The caller must store the root block number "out-of-band", and pass it + /// to the DiskBtreeReader::new() when you want to read the tree again. + /// (In the image and delta layers, it is stored in the beginning of the file, + /// in the summary header) + /// + pub fn finish(mut self) -> Result<(u32, W), std::io::Error> { + // flush all levels, except the root. + while self.stack.len() > 1 { + self.flush_node()?; + } + + let root = self.stack.first().unwrap(); + let buf = root.pack(); + let root_blknum = self.writer.write_blk(buf)?; + + Ok((root_blknum, self.writer)) + } + + pub fn borrow_writer(&self) -> &W { + &self.writer + } +} + +/// +/// BuildNode represesnts an incomplete page that we are appending to. +/// +#[derive(Clone, Debug)] +struct BuildNode { + num_children: u16, + level: u8, + prefix: Vec, + suffix_len: usize, + + keys: Vec, + values: Vec, + + size: usize, // physical size of this node, if it was written to disk like this +} + +const NODE_SIZE: usize = PAGE_SZ; + +const NODE_HDR_SIZE: usize = 2 + 1 + 1 + 1; + +impl BuildNode { + fn new(level: u8) -> Self { + BuildNode { + num_children: 0, + level, + prefix: Vec::new(), + suffix_len: 0, + keys: Vec::new(), + values: Vec::new(), + size: NODE_HDR_SIZE, + } + } + + /// Try to append a key-value pair to this node. Returns 'true' on + /// success, 'false' if the page was full or the key was + /// incompatible with the prefix of the existing keys. + fn push(&mut self, key: &[u8; L], value: Value) -> bool { + // If we have already performed prefix-compression on the page, + // check that the incoming key has the same prefix. + if self.num_children > 0 { + // does the prefix allow it? + if !key.starts_with(&self.prefix) { + return false; + } + } else { + self.suffix_len = key.len(); + } + + // Is the node too full? + if self.size + self.suffix_len + VALUE_SZ >= NODE_SIZE { + return false; + } + + // All clear + self.num_children += 1; + self.keys.extend(&key[self.prefix.len()..]); + self.values.extend(value.0); + + assert!(self.keys.len() == self.num_children as usize * self.suffix_len as usize); + assert!(self.values.len() == self.num_children as usize * VALUE_SZ); + + self.size += self.suffix_len + VALUE_SZ; + + true + } + + /// + /// Perform prefix-compression. + /// + /// Returns 'true' on success, 'false' if no compression was possible. + /// + fn compress(&mut self) -> bool { + let first_suffix = self.first_suffix(); + let last_suffix = self.last_suffix(); + + // Find the common prefix among all keys + let mut prefix_len = 0; + while prefix_len < self.suffix_len { + if first_suffix[prefix_len] != last_suffix[prefix_len] { + break; + } + prefix_len += 1; + } + if prefix_len == 0 { + return false; + } + + // Can compress. Rewrite the keys without the common prefix. + self.prefix.extend(&self.keys[..prefix_len]); + + let mut new_keys = Vec::new(); + let mut key_off = 0; + while key_off < self.keys.len() { + let next_key_off = key_off + self.suffix_len; + new_keys.extend(&self.keys[key_off + prefix_len..next_key_off]); + key_off = next_key_off; + } + self.keys = new_keys; + self.suffix_len -= prefix_len; + + self.size -= prefix_len * self.num_children as usize; + self.size += prefix_len; + + assert!(self.keys.len() == self.num_children as usize * self.suffix_len as usize); + assert!(self.values.len() == self.num_children as usize * VALUE_SZ); + + true + } + + /// + /// Serialize the node to on-disk format. + /// + fn pack(&self) -> Bytes { + assert!(self.keys.len() == self.num_children as usize * self.suffix_len as usize); + assert!(self.values.len() == self.num_children as usize * VALUE_SZ); + assert!(self.num_children > 0); + + let mut buf = BytesMut::new(); + + buf.put_u16(self.num_children); + buf.put_u8(self.level); + buf.put_u8(self.prefix.len() as u8); + buf.put_u8(self.suffix_len as u8); + buf.put(&self.prefix[..]); + buf.put(&self.keys[..]); + buf.put(&self.values[..]); + + assert!(buf.len() == self.size); + + assert!(buf.len() <= PAGE_SZ); + buf.resize(PAGE_SZ, 0); + buf.freeze() + } + + fn first_suffix(&self) -> &[u8] { + &self.keys[..self.suffix_len] + } + fn last_suffix(&self) -> &[u8] { + &self.keys[self.keys.len() - self.suffix_len..] + } + + /// Return the full first key of the page, including the prefix + fn first_key(&self) -> [u8; L] { + let mut key = [0u8; L]; + key[..self.prefix.len()].copy_from_slice(&self.prefix); + key[self.prefix.len()..].copy_from_slice(self.first_suffix()); + key + } +} + +#[cfg(test)] +mod tests { + use super::*; + use rand::Rng; + use std::collections::BTreeMap; + use std::sync::atomic::{AtomicUsize, Ordering}; + + #[derive(Clone, Default)] + struct TestDisk { + blocks: Vec, + } + impl TestDisk { + fn new() -> Self { + Self::default() + } + } + impl BlockReader for TestDisk { + type BlockLease = std::rc::Rc<[u8; PAGE_SZ]>; + + fn read_blk(&self, blknum: u32) -> Result { + let mut buf = [0u8; PAGE_SZ]; + buf.copy_from_slice(&self.blocks[blknum as usize]); + Ok(std::rc::Rc::new(buf)) + } + } + impl BlockWriter for &mut TestDisk { + fn write_blk(&mut self, buf: Bytes) -> Result { + let blknum = self.blocks.len(); + self.blocks.push(buf); + Ok(blknum as u32) + } + } + + #[test] + fn basic() -> anyhow::Result<()> { + let mut disk = TestDisk::new(); + let mut writer = DiskBtreeBuilder::<_, 6>::new(&mut disk); + + let all_keys: Vec<&[u8; 6]> = vec![ + b"xaaaaa", b"xaaaba", b"xaaaca", b"xabaaa", b"xababa", b"xabaca", b"xabada", b"xabadb", + ]; + let all_data: Vec<(&[u8; 6], u64)> = all_keys + .iter() + .enumerate() + .map(|(idx, key)| (*key, idx as u64)) + .collect(); + for (key, val) in all_data.iter() { + writer.append(key, *val)?; + } + + let (root_offset, _writer) = writer.finish()?; + + let reader = DiskBtreeReader::new(0, root_offset, disk); + + reader.dump()?; + + // Test the `get` function on all the keys. + for (key, val) in all_data.iter() { + assert_eq!(reader.get(key)?, Some(*val)); + } + // And on some keys that don't exist + assert_eq!(reader.get(b"aaaaaa")?, None); + assert_eq!(reader.get(b"zzzzzz")?, None); + assert_eq!(reader.get(b"xaaabx")?, None); + + // Test search with `visit` function + let search_key = b"xabaaa"; + let expected: Vec<(Vec, u64)> = all_data + .iter() + .filter(|(key, _value)| key[..] >= search_key[..]) + .map(|(key, value)| (key.to_vec(), *value)) + .collect(); + + let mut data = Vec::new(); + reader.visit(search_key, VisitDirection::Forwards, |key, value| { + data.push((key.to_vec(), value)); + true + })?; + assert_eq!(data, expected); + + // Test a backwards scan + let mut expected: Vec<(Vec, u64)> = all_data + .iter() + .filter(|(key, _value)| key[..] <= search_key[..]) + .map(|(key, value)| (key.to_vec(), *value)) + .collect(); + expected.reverse(); + let mut data = Vec::new(); + reader.visit(search_key, VisitDirection::Backwards, |key, value| { + data.push((key.to_vec(), value)); + true + })?; + assert_eq!(data, expected); + + // Backward scan where nothing matches + reader.visit(b"aaaaaa", VisitDirection::Backwards, |key, value| { + panic!("found unexpected key {}: {}", hex::encode(key), value); + })?; + + // Full scan + let expected: Vec<(Vec, u64)> = all_data + .iter() + .map(|(key, value)| (key.to_vec(), *value)) + .collect(); + let mut data = Vec::new(); + reader.visit(&[0u8; 6], VisitDirection::Forwards, |key, value| { + data.push((key.to_vec(), value)); + true + })?; + assert_eq!(data, expected); + + Ok(()) + } + + #[test] + fn lots_of_keys() -> anyhow::Result<()> { + let mut disk = TestDisk::new(); + let mut writer = DiskBtreeBuilder::<_, 8>::new(&mut disk); + + const NUM_KEYS: u64 = 1000; + + let mut all_data: BTreeMap = BTreeMap::new(); + + for idx in 0..NUM_KEYS { + let key_int: u64 = 1 + idx * 2; + let key = u64::to_be_bytes(key_int); + writer.append(&key, idx)?; + + all_data.insert(key_int, idx); + } + + let (root_offset, _writer) = writer.finish()?; + + let reader = DiskBtreeReader::new(0, root_offset, disk); + + reader.dump()?; + + use std::sync::Mutex; + + let result = Mutex::new(Vec::new()); + let limit: AtomicUsize = AtomicUsize::new(10); + let take_ten = |key: &[u8], value: u64| { + let mut keybuf = [0u8; 8]; + keybuf.copy_from_slice(key); + let key_int = u64::from_be_bytes(keybuf); + + let mut result = result.lock().unwrap(); + result.push((key_int, value)); + + // keep going until we have 10 matches + result.len() < limit.load(Ordering::Relaxed) + }; + + for search_key_int in 0..(NUM_KEYS * 2 + 10) { + let search_key = u64::to_be_bytes(search_key_int); + assert_eq!( + reader.get(&search_key)?, + all_data.get(&search_key_int).cloned() + ); + + // Test a forward scan starting with this key + result.lock().unwrap().clear(); + reader.visit(&search_key, VisitDirection::Forwards, take_ten)?; + let expected = all_data + .range(search_key_int..) + .take(10) + .map(|(&key, &val)| (key, val)) + .collect::>(); + assert_eq!(*result.lock().unwrap(), expected); + + // And a backwards scan + result.lock().unwrap().clear(); + reader.visit(&search_key, VisitDirection::Backwards, take_ten)?; + let expected = all_data + .range(..=search_key_int) + .rev() + .take(10) + .map(|(&key, &val)| (key, val)) + .collect::>(); + assert_eq!(*result.lock().unwrap(), expected); + } + + // full scan + let search_key = u64::to_be_bytes(0); + limit.store(usize::MAX, Ordering::Relaxed); + result.lock().unwrap().clear(); + reader.visit(&search_key, VisitDirection::Forwards, take_ten)?; + let expected = all_data + .iter() + .map(|(&key, &val)| (key, val)) + .collect::>(); + assert_eq!(*result.lock().unwrap(), expected); + + // full scan + let search_key = u64::to_be_bytes(u64::MAX); + limit.store(usize::MAX, Ordering::Relaxed); + result.lock().unwrap().clear(); + reader.visit(&search_key, VisitDirection::Backwards, take_ten)?; + let expected = all_data + .iter() + .rev() + .map(|(&key, &val)| (key, val)) + .collect::>(); + assert_eq!(*result.lock().unwrap(), expected); + + Ok(()) + } + + #[test] + fn random_data() -> anyhow::Result<()> { + // Generate random keys with exponential distribution, to + // exercise the prefix compression + const NUM_KEYS: usize = 100000; + let mut all_data: BTreeMap = BTreeMap::new(); + for idx in 0..NUM_KEYS { + let u: f64 = rand::thread_rng().gen_range(0.0..1.0); + let t = -(f64::ln(u)); + let key_int = (t * 1000000.0) as u128; + + all_data.insert(key_int as u128, idx as u64); + } + + // Build a tree from it + let mut disk = TestDisk::new(); + let mut writer = DiskBtreeBuilder::<_, 16>::new(&mut disk); + + for (&key, &val) in all_data.iter() { + writer.append(&u128::to_be_bytes(key), val)?; + } + let (root_offset, _writer) = writer.finish()?; + + let reader = DiskBtreeReader::new(0, root_offset, disk); + + // Test get() operation on all the keys + for (&key, &val) in all_data.iter() { + let search_key = u128::to_be_bytes(key); + assert_eq!(reader.get(&search_key)?, Some(val)); + } + + // Test get() operations on random keys, most of which will not exist + for _ in 0..100000 { + let key_int = rand::thread_rng().gen::(); + let search_key = u128::to_be_bytes(key_int); + assert!(reader.get(&search_key)? == all_data.get(&key_int).cloned()); + } + + // Test boundary cases + assert!(reader.get(&u128::to_be_bytes(u128::MIN))? == all_data.get(&u128::MIN).cloned()); + assert!(reader.get(&u128::to_be_bytes(u128::MAX))? == all_data.get(&u128::MAX).cloned()); + + Ok(()) + } + + #[test] + #[should_panic(expected = "unsorted input")] + fn unsorted_input() { + let mut disk = TestDisk::new(); + let mut writer = DiskBtreeBuilder::<_, 2>::new(&mut disk); + + let _ = writer.append(b"ba", 1); + let _ = writer.append(b"bb", 2); + let _ = writer.append(b"aa", 3); + } + + /// + /// This test contains a particular data set, see disk_btree_test_data.rs + /// + #[test] + fn particular_data() -> anyhow::Result<()> { + // Build a tree from it + let mut disk = TestDisk::new(); + let mut writer = DiskBtreeBuilder::<_, 26>::new(&mut disk); + + for (key, val) in disk_btree_test_data::TEST_DATA { + writer.append(&key, val)?; + } + let (root_offset, writer) = writer.finish()?; + + println!("SIZE: {} blocks", writer.blocks.len()); + + let reader = DiskBtreeReader::new(0, root_offset, disk); + + // Test get() operation on all the keys + for (key, val) in disk_btree_test_data::TEST_DATA { + assert_eq!(reader.get(&key)?, Some(val)); + } + + // Test full scan + let mut count = 0; + reader.visit(&[0u8; 26], VisitDirection::Forwards, |_key, _value| { + count += 1; + true + })?; + assert_eq!(count, disk_btree_test_data::TEST_DATA.len()); + + reader.dump()?; + + Ok(()) + } +} + +#[cfg(test)] +#[path = "disk_btree_test_data.rs"] +mod disk_btree_test_data; diff --git a/pageserver/src/layered_repository/disk_btree_test_data.rs b/pageserver/src/layered_repository/disk_btree_test_data.rs new file mode 100644 index 0000000000..9462573f03 --- /dev/null +++ b/pageserver/src/layered_repository/disk_btree_test_data.rs @@ -0,0 +1,2013 @@ +use hex_literal::hex; + +/// Test data set for the 'particular_data' test in disk_btree.rs +/// +/// This test contains a particular data set, representing all the keys +/// generated by the 'test_random_updates' unit test. I extracted this while +/// trying to debug a failure in that test. The bug turned out to be +/// elsewhere, and I'm not sure if this is still useful, but keeping it for +/// now... Maybe it's a useful data set to show the typical key-values used +/// by a delta layer, for evaluating how well the prefix compression works. +#[rustfmt::skip] +pub static TEST_DATA: [([u8; 26], u64); 2000] = [ + (hex!("0122222222333333334444444455000000000000000000000010"), 0x004001), + (hex!("0122222222333333334444444455000000000000000000007cb0"), 0x0040a1), + (hex!("0122222222333333334444444455000000010000000000000020"), 0x004141), + (hex!("0122222222333333334444444455000000020000000000000030"), 0x0041e1), + (hex!("01222222223333333344444444550000000200000000000051a0"), 0x004281), + (hex!("0122222222333333334444444455000000030000000000000040"), 0x004321), + (hex!("0122222222333333334444444455000000030000000000006cf0"), 0x0043c1), + (hex!("0122222222333333334444444455000000030000000000007140"), 0x004461), + (hex!("0122222222333333334444444455000000040000000000000050"), 0x004501), + (hex!("01222222223333333344444444550000000400000000000047f0"), 0x0045a1), + (hex!("01222222223333333344444444550000000400000000000072b0"), 0x004641), + (hex!("0122222222333333334444444455000000050000000000000060"), 0x0046e1), + (hex!("0122222222333333334444444455000000050000000000005550"), 0x004781), + (hex!("0122222222333333334444444455000000060000000000000070"), 0x004821), + (hex!("01222222223333333344444444550000000600000000000044a0"), 0x0048c1), + (hex!("0122222222333333334444444455000000060000000000006870"), 0x004961), + (hex!("0122222222333333334444444455000000070000000000000080"), 0x004a01), + (hex!("0122222222333333334444444455000000080000000000000090"), 0x004aa1), + (hex!("0122222222333333334444444455000000080000000000004150"), 0x004b41), + (hex!("01222222223333333344444444550000000900000000000000a0"), 0x004be1), + (hex!("01222222223333333344444444550000000a00000000000000b0"), 0x004c81), + (hex!("01222222223333333344444444550000000a0000000000006680"), 0x004d21), + (hex!("01222222223333333344444444550000000b00000000000000c0"), 0x004dc1), + (hex!("01222222223333333344444444550000000b0000000000006230"), 0x004e61), + (hex!("01222222223333333344444444550000000c00000000000000d0"), 0x004f01), + (hex!("01222222223333333344444444550000000d00000000000000e0"), 0x004fa1), + (hex!("01222222223333333344444444550000000e00000000000000f0"), 0x005041), + (hex!("01222222223333333344444444550000000e0000000000006000"), 0x0050e1), + (hex!("01222222223333333344444444550000000f0000000000000100"), 0x005181), + (hex!("01222222223333333344444444550000000f00000000000053c0"), 0x005221), + (hex!("01222222223333333344444444550000000f0000000000006580"), 0x0052c1), + (hex!("0122222222333333334444444455000000100000000000000110"), 0x005361), + (hex!("01222222223333333344444444550000001000000000000046c0"), 0x005401), + (hex!("0122222222333333334444444455000000100000000000004e40"), 0x0054a1), + (hex!("0122222222333333334444444455000000110000000000000120"), 0x005541), + (hex!("0122222222333333334444444455000000120000000000000130"), 0x0055e1), + (hex!("01222222223333333344444444550000001200000000000066d0"), 0x005681), + (hex!("0122222222333333334444444455000000130000000000000140"), 0x005721), + (hex!("0122222222333333334444444455000000130000000000007710"), 0x0057c1), + (hex!("0122222222333333334444444455000000140000000000000150"), 0x005861), + (hex!("0122222222333333334444444455000000140000000000006c40"), 0x005901), + (hex!("0122222222333333334444444455000000150000000000000160"), 0x0059a1), + (hex!("0122222222333333334444444455000000150000000000005990"), 0x005a41), + (hex!("0122222222333333334444444455000000160000000000000170"), 0x005ae1), + (hex!("0122222222333333334444444455000000160000000000005530"), 0x005b81), + (hex!("0122222222333333334444444455000000170000000000000180"), 0x005c21), + (hex!("0122222222333333334444444455000000170000000000004290"), 0x005cc1), + (hex!("0122222222333333334444444455000000180000000000000190"), 0x005d61), + (hex!("01222222223333333344444444550000001800000000000051c0"), 0x005e01), + (hex!("01222222223333333344444444550000001900000000000001a0"), 0x005ea1), + (hex!("0122222222333333334444444455000000190000000000005420"), 0x005f41), + (hex!("0122222222333333334444444455000000190000000000005770"), 0x005fe1), + (hex!("01222222223333333344444444550000001900000000000079d0"), 0x006081), + (hex!("01222222223333333344444444550000001a00000000000001b0"), 0x006121), + (hex!("01222222223333333344444444550000001a0000000000006f70"), 0x0061c1), + (hex!("01222222223333333344444444550000001a0000000000007150"), 0x006261), + (hex!("01222222223333333344444444550000001b00000000000001c0"), 0x006301), + (hex!("01222222223333333344444444550000001b0000000000005070"), 0x0063a1), + (hex!("01222222223333333344444444550000001c00000000000001d0"), 0x006441), + (hex!("01222222223333333344444444550000001d00000000000001e0"), 0x0064e1), + (hex!("01222222223333333344444444550000001e00000000000001f0"), 0x006581), + (hex!("01222222223333333344444444550000001e0000000000005650"), 0x006621), + (hex!("01222222223333333344444444550000001f0000000000000200"), 0x0066c1), + (hex!("01222222223333333344444444550000001f0000000000006ca0"), 0x006761), + (hex!("0122222222333333334444444455000000200000000000000210"), 0x006801), + (hex!("0122222222333333334444444455000000200000000000005fc0"), 0x0068a1), + (hex!("0122222222333333334444444455000000210000000000000220"), 0x006941), + (hex!("0122222222333333334444444455000000210000000000006430"), 0x0069e1), + (hex!("0122222222333333334444444455000000220000000000000230"), 0x006a81), + (hex!("01222222223333333344444444550000002200000000000040e0"), 0x006b21), + (hex!("0122222222333333334444444455000000230000000000000240"), 0x006bc1), + (hex!("01222222223333333344444444550000002300000000000042d0"), 0x006c61), + (hex!("0122222222333333334444444455000000240000000000000250"), 0x006d01), + (hex!("0122222222333333334444444455000000250000000000000260"), 0x006da1), + (hex!("01222222223333333344444444550000002500000000000058c0"), 0x006e41), + (hex!("0122222222333333334444444455000000260000000000000270"), 0x006ee1), + (hex!("0122222222333333334444444455000000260000000000004020"), 0x006f81), + (hex!("0122222222333333334444444455000000270000000000000280"), 0x007021), + (hex!("0122222222333333334444444455000000280000000000000290"), 0x0070c1), + (hex!("0122222222333333334444444455000000280000000000007c00"), 0x007161), + (hex!("01222222223333333344444444550000002900000000000002a0"), 0x007201), + (hex!("01222222223333333344444444550000002a00000000000002b0"), 0x0072a1), + (hex!("01222222223333333344444444550000002b00000000000002c0"), 0x007341), + (hex!("01222222223333333344444444550000002c00000000000002d0"), 0x0073e1), + (hex!("01222222223333333344444444550000002c00000000000041b0"), 0x007481), + (hex!("01222222223333333344444444550000002c0000000000004c30"), 0x007521), + (hex!("01222222223333333344444444550000002d00000000000002e0"), 0x0075c1), + (hex!("01222222223333333344444444550000002d0000000000005e40"), 0x007661), + (hex!("01222222223333333344444444550000002d0000000000006990"), 0x007701), + (hex!("01222222223333333344444444550000002e00000000000002f0"), 0x0077a1), + (hex!("01222222223333333344444444550000002f0000000000000300"), 0x007841), + (hex!("01222222223333333344444444550000002f0000000000004a70"), 0x0078e1), + (hex!("01222222223333333344444444550000002f0000000000006b40"), 0x007981), + (hex!("0122222222333333334444444455000000300000000000000310"), 0x007a21), + (hex!("0122222222333333334444444455000000310000000000000320"), 0x007ac1), + (hex!("0122222222333333334444444455000000320000000000000330"), 0x007b61), + (hex!("01222222223333333344444444550000003200000000000041a0"), 0x007c01), + (hex!("0122222222333333334444444455000000320000000000007340"), 0x007ca1), + (hex!("0122222222333333334444444455000000320000000000007730"), 0x007d41), + (hex!("0122222222333333334444444455000000330000000000000340"), 0x007de1), + (hex!("01222222223333333344444444550000003300000000000055a0"), 0x007e81), + (hex!("0122222222333333334444444455000000340000000000000350"), 0x007f21), + (hex!("0122222222333333334444444455000000350000000000000360"), 0x007fc1), + (hex!("01222222223333333344444444550000003500000000000077a0"), 0x008061), + (hex!("0122222222333333334444444455000000360000000000000370"), 0x008101), + (hex!("0122222222333333334444444455000000370000000000000380"), 0x0081a1), + (hex!("0122222222333333334444444455000000380000000000000390"), 0x008241), + (hex!("01222222223333333344444444550000003900000000000003a0"), 0x0082e1), + (hex!("01222222223333333344444444550000003a00000000000003b0"), 0x008381), + (hex!("01222222223333333344444444550000003a00000000000071c0"), 0x008421), + (hex!("01222222223333333344444444550000003b00000000000003c0"), 0x0084c1), + (hex!("01222222223333333344444444550000003c00000000000003d0"), 0x008561), + (hex!("01222222223333333344444444550000003d00000000000003e0"), 0x008601), + (hex!("01222222223333333344444444550000003e00000000000003f0"), 0x0086a1), + 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(hex!("0122222222333333334444444455000003b90000000000003ba0"), 0x04e881), + (hex!("0122222222333333334444444455000003b90000000000006750"), 0x04e921), + (hex!("0122222222333333334444444455000003ba0000000000003bb0"), 0x04e9c1), + (hex!("0122222222333333334444444455000003ba0000000000007a10"), 0x04ea61), + (hex!("0122222222333333334444444455000003ba0000000000007a20"), 0x04eb01), + (hex!("0122222222333333334444444455000003bb0000000000003bc0"), 0x04eba1), + (hex!("0122222222333333334444444455000003bb0000000000005bc0"), 0x04ec41), + (hex!("0122222222333333334444444455000003bc0000000000003bd0"), 0x04ece1), + (hex!("0122222222333333334444444455000003bc0000000000005e80"), 0x04ed81), + (hex!("0122222222333333334444444455000003bc0000000000007ab0"), 0x04ee21), + (hex!("0122222222333333334444444455000003bd0000000000003be0"), 0x04eec1), + (hex!("0122222222333333334444444455000003bd00000000000049b0"), 0x04ef61), + (hex!("0122222222333333334444444455000003be0000000000003bf0"), 0x04f001), + (hex!("0122222222333333334444444455000003be0000000000005780"), 0x04f0a1), + (hex!("0122222222333333334444444455000003be0000000000007930"), 0x04f141), + (hex!("0122222222333333334444444455000003bf0000000000003c00"), 0x04f1e1), + (hex!("0122222222333333334444444455000003bf0000000000005de0"), 0x04f281), + (hex!("0122222222333333334444444455000003bf00000000000060b0"), 0x04f321), + (hex!("0122222222333333334444444455000003bf00000000000060c0"), 0x04f3c1), + (hex!("0122222222333333334444444455000003bf0000000000006a50"), 0x04f461), + (hex!("0122222222333333334444444455000003c00000000000003c10"), 0x04f501), + (hex!("0122222222333333334444444455000003c00000000000004030"), 0x04f5a1), + (hex!("0122222222333333334444444455000003c10000000000003c20"), 0x04f641), + (hex!("0122222222333333334444444455000003c20000000000003c30"), 0x04f6e1), + (hex!("0122222222333333334444444455000003c200000000000040b0"), 0x04f781), + (hex!("0122222222333333334444444455000003c30000000000003c40"), 0x04f821), + (hex!("0122222222333333334444444455000003c40000000000003c50"), 0x04f8c1), + (hex!("0122222222333333334444444455000003c40000000000005ba0"), 0x04f961), + (hex!("0122222222333333334444444455000003c50000000000003c60"), 0x04fa01), + (hex!("0122222222333333334444444455000003c60000000000003c70"), 0x04faa1), + (hex!("0122222222333333334444444455000003c70000000000003c80"), 0x04fb41), + (hex!("0122222222333333334444444455000003c70000000000004270"), 0x04fbe1), + (hex!("0122222222333333334444444455000003c80000000000003c90"), 0x04fc81), + (hex!("0122222222333333334444444455000003c80000000000006e70"), 0x04fd21), + (hex!("0122222222333333334444444455000003c90000000000003ca0"), 0x04fdc1), + (hex!("0122222222333333334444444455000003ca0000000000003cb0"), 0x04fe61), + (hex!("0122222222333333334444444455000003ca0000000000006e20"), 0x04ff01), + (hex!("0122222222333333334444444455000003ca0000000000007c20"), 0x04ffa1), + (hex!("0122222222333333334444444455000003cb0000000000003cc0"), 0x050041), + (hex!("0122222222333333334444444455000003cc0000000000003cd0"), 0x0500e1), + (hex!("0122222222333333334444444455000003cc0000000000006120"), 0x050181), + (hex!("0122222222333333334444444455000003cc0000000000007950"), 0x050221), + (hex!("0122222222333333334444444455000003cd0000000000003ce0"), 0x0502c1), + (hex!("0122222222333333334444444455000003ce0000000000003cf0"), 0x050361), + (hex!("0122222222333333334444444455000003cf0000000000003d00"), 0x050401), + (hex!("0122222222333333334444444455000003d00000000000003d10"), 0x0504a1), + (hex!("0122222222333333334444444455000003d10000000000003d20"), 0x050541), + (hex!("0122222222333333334444444455000003d10000000000005e50"), 0x0505e1), + (hex!("0122222222333333334444444455000003d10000000000007880"), 0x050681), + (hex!("0122222222333333334444444455000003d20000000000003d30"), 0x050721), + (hex!("0122222222333333334444444455000003d20000000000005d00"), 0x0507c1), + (hex!("0122222222333333334444444455000003d30000000000003d40"), 0x050861), + (hex!("0122222222333333334444444455000003d30000000000005d40"), 0x050901), + (hex!("0122222222333333334444444455000003d300000000000063f0"), 0x0509a1), + (hex!("0122222222333333334444444455000003d40000000000003d50"), 0x050a41), + (hex!("0122222222333333334444444455000003d40000000000005700"), 0x050ae1), + (hex!("0122222222333333334444444455000003d400000000000078f0"), 0x050b81), + (hex!("0122222222333333334444444455000003d50000000000003d60"), 0x050c21), + (hex!("0122222222333333334444444455000003d60000000000003d70"), 0x050cc1), + (hex!("0122222222333333334444444455000003d70000000000003d80"), 0x050d61), + (hex!("0122222222333333334444444455000003d80000000000003d90"), 0x050e01), + (hex!("0122222222333333334444444455000003d80000000000006690"), 0x050ea1), + (hex!("0122222222333333334444444455000003d90000000000003da0"), 0x050f41), + (hex!("0122222222333333334444444455000003d900000000000076d0"), 0x050fe1), + (hex!("0122222222333333334444444455000003da0000000000003db0"), 0x051081), + (hex!("0122222222333333334444444455000003db0000000000003dc0"), 0x051121), + (hex!("0122222222333333334444444455000003db0000000000004a30"), 0x0511c1), + (hex!("0122222222333333334444444455000003db0000000000005390"), 0x051261), + (hex!("0122222222333333334444444455000003dc0000000000003dd0"), 0x051301), + (hex!("0122222222333333334444444455000003dc0000000000006d60"), 0x0513a1), + (hex!("0122222222333333334444444455000003dd0000000000003de0"), 0x051441), + (hex!("0122222222333333334444444455000003de0000000000003df0"), 0x0514e1), + (hex!("0122222222333333334444444455000003df0000000000003e00"), 0x051581), + (hex!("0122222222333333334444444455000003df0000000000005240"), 0x051621), + (hex!("0122222222333333334444444455000003df0000000000005610"), 0x0516c1), + (hex!("0122222222333333334444444455000003e00000000000003e10"), 0x051761), + (hex!("0122222222333333334444444455000003e00000000000006500"), 0x051801), + (hex!("0122222222333333334444444455000003e10000000000003e20"), 0x0518a1), + (hex!("0122222222333333334444444455000003e10000000000006a10"), 0x051941), + (hex!("0122222222333333334444444455000003e10000000000007c10"), 0x0519e1), + (hex!("0122222222333333334444444455000003e20000000000003e30"), 0x051a81), + (hex!("0122222222333333334444444455000003e20000000000006310"), 0x051b21), + (hex!("0122222222333333334444444455000003e30000000000003e40"), 0x051bc1), + (hex!("0122222222333333334444444455000003e40000000000003e50"), 0x051c61), + (hex!("0122222222333333334444444455000003e40000000000006780"), 0x051d01), + (hex!("0122222222333333334444444455000003e40000000000007ce0"), 0x051da1), + (hex!("0122222222333333334444444455000003e50000000000003e60"), 0x051e41), + (hex!("0122222222333333334444444455000003e60000000000003e70"), 0x051ee1), + (hex!("0122222222333333334444444455000003e60000000000005040"), 0x051f81), + (hex!("0122222222333333334444444455000003e60000000000005bf0"), 0x052021), + (hex!("0122222222333333334444444455000003e70000000000003e80"), 0x0520c1), + (hex!("0122222222333333334444444455000003e70000000000003f50"), 0x052161), +]; diff --git a/pageserver/src/layered_repository/image_layer.rs b/pageserver/src/layered_repository/image_layer.rs index d0afce1549..08e635f073 100644 --- a/pageserver/src/layered_repository/image_layer.rs +++ b/pageserver/src/layered_repository/image_layer.rs @@ -16,40 +16,43 @@ //! Every image layer file consists of three parts: "summary", //! "index", and "values". The summary is a fixed size header at the //! beginning of the file, and it contains basic information about the -//! layer, and offsets to the other parts. The "index" is a serialized -//! HashMap, mapping from Key to an offset in the "values" part. The +//! layer, and offsets to the other parts. The "index" is a B-tree, +//! mapping from Key to an offset in the "values" part. The //! actual page images are stored in the "values" part. -//! -//! Only the "index" is loaded into memory by the load function. -//! When images are needed, they are read directly from disk. -//! use crate::config::PageServerConf; use crate::layered_repository::blob_io::{BlobCursor, BlobWriter, WriteBlobWriter}; -use crate::layered_repository::block_io::{BlockReader, FileBlockReader}; +use crate::layered_repository::block_io::{BlockBuf, BlockReader, FileBlockReader}; +use crate::layered_repository::disk_btree::{DiskBtreeBuilder, DiskBtreeReader, VisitDirection}; use crate::layered_repository::filename::{ImageFileName, PathOrConf}; use crate::layered_repository::storage_layer::{ Layer, ValueReconstructResult, ValueReconstructState, }; use crate::page_cache::PAGE_SZ; -use crate::repository::{Key, Value}; +use crate::repository::{Key, Value, KEY_SIZE}; use crate::virtual_file::VirtualFile; use crate::{ZTenantId, ZTimelineId}; use crate::{IMAGE_FILE_MAGIC, STORAGE_FORMAT_VERSION}; use anyhow::{bail, ensure, Context, Result}; use bytes::Bytes; +use hex; use log::*; use serde::{Deserialize, Serialize}; -use std::collections::HashMap; use std::fs; use std::io::Write; use std::io::{Seek, SeekFrom}; use std::ops::Range; use std::path::{Path, PathBuf}; -use std::sync::{RwLock, RwLockReadGuard, TryLockError}; +use std::sync::{RwLock, RwLockReadGuard}; use zenith_utils::bin_ser::BeSer; use zenith_utils::lsn::Lsn; +/// +/// Header stored in the beginning of the file +/// +/// After this comes the 'values' part, starting on block 1. After that, +/// the 'index' starts at the block indicated by 'index_start_blk' +/// #[derive(Debug, Serialize, Deserialize, PartialEq, Eq)] struct Summary { /// Magic value to identify this as a zenith image file. Always IMAGE_FILE_MAGIC. @@ -63,6 +66,9 @@ struct Summary { /// Block number where the 'index' part of the file begins. index_start_blk: u32, + /// Block within the 'index', where the B-tree root page is stored + index_root_blk: u32, + // the 'values' part starts after the summary header, on block 1. } impl From<&ImageLayer> for Summary { @@ -73,10 +79,10 @@ impl From<&ImageLayer> for Summary { tenantid: layer.tenantid, timelineid: layer.timelineid, key_range: layer.key_range.clone(), - lsn: layer.lsn, index_start_blk: 0, + index_root_blk: 0, } } } @@ -104,11 +110,9 @@ pub struct ImageLayerInner { /// If false, the 'index' has not been loaded into memory yet. loaded: bool, - /// offset of each value - index: HashMap, - // values copied from summary index_start_blk: u32, + index_root_blk: u32, /// Reader object for reading blocks from the file. (None if not loaded yet) file: Option>, @@ -147,21 +151,21 @@ impl Layer for ImageLayer { assert!(lsn_range.end >= self.lsn); let inner = self.load()?; - if let Some(&offset) = inner.index.get(&key) { - let buf = inner - .file - .as_ref() - .unwrap() - .block_cursor() - .read_blob(offset) - .with_context(|| { - format!( - "failed to read blob from data file {} at offset {}", - self.filename().display(), - offset - ) - })?; - let value = Bytes::from(buf); + + let file = inner.file.as_ref().unwrap(); + let tree_reader = DiskBtreeReader::new(inner.index_start_blk, inner.index_root_blk, file); + + let mut keybuf: [u8; KEY_SIZE] = [0u8; KEY_SIZE]; + key.write_to_byte_slice(&mut keybuf); + if let Some(offset) = tree_reader.get(&keybuf)? { + let blob = file.block_cursor().read_blob(offset).with_context(|| { + format!( + "failed to read value from data file {} at offset {}", + self.filename().display(), + offset + ) + })?; + let value = Bytes::from(blob); reconstruct_state.img = Some((self.lsn, value)); Ok(ValueReconstructResult::Complete) @@ -174,33 +178,6 @@ impl Layer for ImageLayer { todo!(); } - fn unload(&self) -> Result<()> { - // Unload the index. - // - // TODO: we should access the index directly from pages on the disk, - // using the buffer cache. This load/unload mechanism is really ad hoc. - - // FIXME: In debug mode, loading and unloading the index slows - // things down so much that you get timeout errors. At least - // with the test_parallel_copy test. So as an even more ad hoc - // stopgap fix for that, only unload every on average 10 - // checkpoint cycles. - use rand::RngCore; - if rand::thread_rng().next_u32() > (u32::MAX / 10) { - return Ok(()); - } - - let mut inner = match self.inner.try_write() { - Ok(inner) => inner, - Err(TryLockError::WouldBlock) => return Ok(()), - Err(TryLockError::Poisoned(_)) => panic!("ImageLayer lock was poisoned"), - }; - inner.index = HashMap::default(); - inner.loaded = false; - - Ok(()) - } - fn delete(&self) -> Result<()> { // delete underlying file fs::remove_file(self.path())?; @@ -227,10 +204,16 @@ impl Layer for ImageLayer { } let inner = self.load()?; + let file = inner.file.as_ref().unwrap(); + let tree_reader = + DiskBtreeReader::<_, KEY_SIZE>::new(inner.index_start_blk, inner.index_root_blk, file); - for (key, offset) in inner.index.iter() { - println!("key: {} offset {}", key, offset); - } + tree_reader.dump()?; + + tree_reader.visit(&[0u8; KEY_SIZE], VisitDirection::Forwards, |key, value| { + println!("key: {} offset {}", hex::encode(key), value); + true + })?; Ok(()) } @@ -300,6 +283,7 @@ impl ImageLayer { PathOrConf::Conf(_) => { let mut expected_summary = Summary::from(self); expected_summary.index_start_blk = actual_summary.index_start_blk; + expected_summary.index_root_blk = actual_summary.index_root_blk; if actual_summary != expected_summary { bail!("in-file summary does not match expected summary. actual = {:?} expected = {:?}", actual_summary, expected_summary); @@ -319,17 +303,8 @@ impl ImageLayer { } } - file.file.seek(SeekFrom::Start( - actual_summary.index_start_blk as u64 * PAGE_SZ as u64, - ))?; - let mut buf_reader = std::io::BufReader::new(&mut file.file); - let index = HashMap::des_from(&mut buf_reader)?; - inner.index_start_blk = actual_summary.index_start_blk; - - info!("loaded from {}", &path.display()); - - inner.index = index; + inner.index_root_blk = actual_summary.index_root_blk; inner.loaded = true; Ok(()) } @@ -348,10 +323,10 @@ impl ImageLayer { key_range: filename.key_range.clone(), lsn: filename.lsn, inner: RwLock::new(ImageLayerInner { - index: HashMap::new(), loaded: false, file: None, index_start_blk: 0, + index_root_blk: 0, }), } } @@ -376,9 +351,9 @@ impl ImageLayer { lsn: summary.lsn, inner: RwLock::new(ImageLayerInner { file: None, - index: HashMap::new(), loaded: false, index_start_blk: 0, + index_root_blk: 0, }), }) } @@ -420,9 +395,8 @@ pub struct ImageLayerWriter { key_range: Range, lsn: Lsn, - index: HashMap, - blob_writer: WriteBlobWriter, + tree: DiskBtreeBuilder, } impl ImageLayerWriter { @@ -447,9 +421,15 @@ impl ImageLayerWriter { }, ); info!("new image layer {}", path.display()); - let file = VirtualFile::create(&path)?; + let mut file = VirtualFile::create(&path)?; + // make room for the header block + file.seek(SeekFrom::Start(PAGE_SZ as u64))?; let blob_writer = WriteBlobWriter::new(file, PAGE_SZ as u64); + // Initialize the b-tree index builder + let block_buf = BlockBuf::new(); + let tree_builder = DiskBtreeBuilder::new(block_buf); + let writer = ImageLayerWriter { conf, _path: path, @@ -457,7 +437,7 @@ impl ImageLayerWriter { tenantid, key_range: key_range.clone(), lsn, - index: HashMap::new(), + tree: tree_builder, blob_writer, }; @@ -473,8 +453,9 @@ impl ImageLayerWriter { ensure!(self.key_range.contains(&key)); let off = self.blob_writer.write_blob(img)?; - let old = self.index.insert(key, off); - assert!(old.is_none()); + let mut keybuf: [u8; KEY_SIZE] = [0u8; KEY_SIZE]; + key.write_to_byte_slice(&mut keybuf); + self.tree.append(&keybuf, off)?; Ok(()) } @@ -486,9 +467,11 @@ impl ImageLayerWriter { let mut file = self.blob_writer.into_inner(); // Write out the index - let buf = HashMap::ser(&self.index)?; file.seek(SeekFrom::Start(index_start_blk as u64 * PAGE_SZ as u64))?; - file.write_all(&buf)?; + let (index_root_blk, block_buf) = self.tree.finish()?; + for buf in block_buf.blocks { + file.write_all(buf.as_ref())?; + } // Fill in the summary on blk 0 let summary = Summary { @@ -499,6 +482,7 @@ impl ImageLayerWriter { key_range: self.key_range.clone(), lsn: self.lsn, index_start_blk, + index_root_blk, }; file.seek(SeekFrom::Start(0))?; Summary::ser_into(&summary, &mut file)?; @@ -514,9 +498,9 @@ impl ImageLayerWriter { lsn: self.lsn, inner: RwLock::new(ImageLayerInner { loaded: false, - index: HashMap::new(), file: None, index_start_blk, + index_root_blk, }), }; trace!("created image layer {}", layer.path().display()); diff --git a/pageserver/src/layered_repository/inmemory_layer.rs b/pageserver/src/layered_repository/inmemory_layer.rs index 8a24528732..a45af51487 100644 --- a/pageserver/src/layered_repository/inmemory_layer.rs +++ b/pageserver/src/layered_repository/inmemory_layer.rs @@ -166,13 +166,6 @@ impl Layer for InMemoryLayer { todo!(); } - /// Cannot unload anything in an in-memory layer, since there's no backing - /// store. To release memory used by an in-memory layer, use 'freeze' to turn - /// it into an on-disk layer. - fn unload(&self) -> Result<()> { - Ok(()) - } - /// Nothing to do here. When you drop the last reference to the layer, it will /// be deallocated. fn delete(&self) -> Result<()> { diff --git a/pageserver/src/layered_repository/storage_layer.rs b/pageserver/src/layered_repository/storage_layer.rs index 5ad43182f6..e413f311c3 100644 --- a/pageserver/src/layered_repository/storage_layer.rs +++ b/pageserver/src/layered_repository/storage_layer.rs @@ -134,10 +134,6 @@ pub trait Layer: Send + Sync { /// Iterate through all keys and values stored in the layer fn iter(&self) -> Box> + '_>; - /// Release memory used by this layer. There is no corresponding 'load' - /// function, that's done implicitly when you call one of the get-functions. - fn unload(&self) -> Result<()>; - /// Permanently remove this layer from disk. fn delete(&self) -> Result<()>; diff --git a/pageserver/src/lib.rs b/pageserver/src/lib.rs index 6d2631b2b1..6dddef5f27 100644 --- a/pageserver/src/lib.rs +++ b/pageserver/src/lib.rs @@ -38,7 +38,7 @@ use pgdatadir_mapping::DatadirTimeline; /// This is embedded in the metadata file, and also in the header of all the /// layer files. If you make any backwards-incompatible changes to the storage /// format, bump this! -pub const STORAGE_FORMAT_VERSION: u16 = 2; +pub const STORAGE_FORMAT_VERSION: u16 = 3; // Magic constants used to identify different kinds of files pub const IMAGE_FILE_MAGIC: u16 = 0x5A60; diff --git a/pageserver/src/repository.rs b/pageserver/src/repository.rs index 7e998b0ebe..02334d3229 100644 --- a/pageserver/src/repository.rs +++ b/pageserver/src/repository.rs @@ -3,6 +3,7 @@ use crate::remote_storage::RemoteIndex; use crate::walrecord::ZenithWalRecord; use crate::CheckpointConfig; use anyhow::{bail, Result}; +use byteorder::{ByteOrder, BE}; use bytes::Bytes; use serde::{Deserialize, Serialize}; use std::fmt; @@ -27,6 +28,8 @@ pub struct Key { pub field6: u32, } +pub const KEY_SIZE: usize = 18; + impl Key { pub fn next(&self) -> Key { self.add(1) @@ -61,7 +64,7 @@ impl Key { key } - pub fn from_array(b: [u8; 18]) -> Self { + pub fn from_slice(b: &[u8]) -> Self { Key { field1: b[0], field2: u32::from_be_bytes(b[1..5].try_into().unwrap()), @@ -71,6 +74,15 @@ impl Key { field6: u32::from_be_bytes(b[14..18].try_into().unwrap()), } } + + pub fn write_to_byte_slice(&self, buf: &mut [u8]) { + buf[0] = self.field1; + BE::write_u32(&mut buf[1..5], self.field2); + BE::write_u32(&mut buf[5..9], self.field3); + BE::write_u32(&mut buf[9..13], self.field4); + buf[13] = self.field5; + BE::write_u32(&mut buf[14..18], self.field6); + } } pub fn key_range_size(key_range: &Range) -> u32 { @@ -569,7 +581,7 @@ mod tests { use lazy_static::lazy_static; lazy_static! { - static ref TEST_KEY: Key = Key::from_array(hex!("112222222233333333444444445500000001")); + static ref TEST_KEY: Key = Key::from_slice(&hex!("112222222233333333444444445500000001")); } #[test] From 8e2a6661e901562ee72c70436a350b4af81968a2 Mon Sep 17 00:00:00 2001 From: Arthur Petukhovsky Date: Mon, 11 Apr 2022 20:36:26 +0300 Subject: [PATCH 78/83] Make wal_storage initialization eager (#1489) --- walkeeper/src/safekeeper.rs | 18 ++++++++++-------- walkeeper/src/timeline.rs | 4 ++-- 2 files changed, 12 insertions(+), 10 deletions(-) diff --git a/walkeeper/src/safekeeper.rs b/walkeeper/src/safekeeper.rs index 307a67e5f3..1e23d87b34 100644 --- a/walkeeper/src/safekeeper.rs +++ b/walkeeper/src/safekeeper.rs @@ -517,14 +517,16 @@ where pub fn new( ztli: ZTimelineId, control_store: CTRL, - wal_store: WAL, + mut wal_store: WAL, state: SafeKeeperState, - ) -> SafeKeeper { + ) -> Result> { if state.timeline_id != ZTimelineId::from([0u8; 16]) && ztli != state.timeline_id { - panic!("Calling SafeKeeper::new with inconsistent ztli ({}) and SafeKeeperState.server.timeline_id ({})", ztli, state.timeline_id); + bail!("Calling SafeKeeper::new with inconsistent ztli ({}) and SafeKeeperState.server.timeline_id ({})", ztli, state.timeline_id); } - SafeKeeper { + wal_store.init_storage(&state)?; + + Ok(SafeKeeper { metrics: SafeKeeperMetrics::new(state.tenant_id, ztli), global_commit_lsn: state.commit_lsn, epoch_start_lsn: Lsn(0), @@ -537,7 +539,7 @@ where s: state, control_store, wal_store, - } + }) } /// Get history of term switches for the available WAL @@ -877,7 +879,7 @@ mod tests { }; let wal_store = DummyWalStore { lsn: Lsn(0) }; let ztli = ZTimelineId::from([0u8; 16]); - let mut sk = SafeKeeper::new(ztli, storage, wal_store, SafeKeeperState::empty()); + let mut sk = SafeKeeper::new(ztli, storage, wal_store, SafeKeeperState::empty()).unwrap(); // check voting for 1 is ok let vote_request = ProposerAcceptorMessage::VoteRequest(VoteRequest { term: 1 }); @@ -892,7 +894,7 @@ mod tests { let storage = InMemoryState { persisted_state: state.clone(), }; - sk = SafeKeeper::new(ztli, storage, sk.wal_store, state); + sk = SafeKeeper::new(ztli, storage, sk.wal_store, state).unwrap(); // and ensure voting second time for 1 is not ok vote_resp = sk.process_msg(&vote_request); @@ -909,7 +911,7 @@ mod tests { }; let wal_store = DummyWalStore { lsn: Lsn(0) }; let ztli = ZTimelineId::from([0u8; 16]); - let mut sk = SafeKeeper::new(ztli, storage, wal_store, SafeKeeperState::empty()); + let mut sk = SafeKeeper::new(ztli, storage, wal_store, SafeKeeperState::empty()).unwrap(); let mut ar_hdr = AppendRequestHeader { term: 1, diff --git a/walkeeper/src/timeline.rs b/walkeeper/src/timeline.rs index b10ab97cc1..a76ef77615 100644 --- a/walkeeper/src/timeline.rs +++ b/walkeeper/src/timeline.rs @@ -100,7 +100,7 @@ impl SharedState { let state = SafeKeeperState::new(zttid, peer_ids); let control_store = control_file::FileStorage::new(zttid, conf); let wal_store = wal_storage::PhysicalStorage::new(zttid, conf); - let mut sk = SafeKeeper::new(zttid.timeline_id, control_store, wal_store, state); + let mut sk = SafeKeeper::new(zttid.timeline_id, control_store, wal_store, state)?; sk.control_store.persist(&sk.s)?; Ok(Self { @@ -127,7 +127,7 @@ impl SharedState { Ok(Self { notified_commit_lsn: Lsn(0), - sk: SafeKeeper::new(zttid.timeline_id, control_store, wal_store, state), + sk: SafeKeeper::new(zttid.timeline_id, control_store, wal_store, state)?, replicas: Vec::new(), active: false, num_computes: 0, From db63fa64ae863187bb044f569ad8aa63c9f5e58b Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Fri, 29 Oct 2021 23:21:40 +0300 Subject: [PATCH 79/83] Use rusoto lib for S3 relish_storage impl --- Cargo.lock | 3394 ----------------- pageserver/Cargo.toml | 6 +- pageserver/src/remote_storage.rs | 8 +- pageserver/src/remote_storage/README.md | 12 - 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"cc", - "libc", -] diff --git a/pageserver/Cargo.toml b/pageserver/Cargo.toml index 4d79811bfb..dccdca291c 100644 --- a/pageserver/Cargo.toml +++ b/pageserver/Cargo.toml @@ -18,6 +18,7 @@ log = "0.4.14" clap = "3.0" daemonize = "0.4.1" tokio = { version = "1.17", features = ["process", "sync", "macros", "fs", "rt", "io-util", "time"] } +tokio-util = { version = "0.7", features = ["io"] } postgres-types = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } postgres-protocol = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } @@ -34,7 +35,6 @@ serde_with = "1.12.0" toml_edit = { version = "0.13", features = ["easy"] } scopeguard = "1.1.0" -async-trait = "0.1" const_format = "0.2.21" tracing = "0.1.27" tracing-futures = "0.2" @@ -45,7 +45,9 @@ once_cell = "1.8.0" crossbeam-utils = "0.8.5" fail = "0.5.0" -rust-s3 = { version = "0.28", default-features = false, features = ["no-verify-ssl", "tokio-rustls-tls"] } +rusoto_core = "0.47" +rusoto_s3 = "0.47" +async-trait = "0.1" async-compression = {version = "0.3", features = ["zstd", "tokio"]} postgres_ffi = { path = "../postgres_ffi" } diff --git a/pageserver/src/remote_storage.rs b/pageserver/src/remote_storage.rs index bdd6086b94..02d37af5de 100644 --- a/pageserver/src/remote_storage.rs +++ b/pageserver/src/remote_storage.rs @@ -5,7 +5,7 @@ //! There are a few components the storage machinery consists of: //! * [`RemoteStorage`] trait a CRUD-like generic abstraction to use for adapting external storages with a few implementations: //! * [`local_fs`] allows to use local file system as an external storage -//! * [`rust_s3`] uses AWS S3 bucket as an external storage +//! * [`s3_bucket`] uses AWS S3 bucket as an external storage //! //! * synchronization logic at [`storage_sync`] module that keeps pageserver state (both runtime one and the workdir files) and storage state in sync. //! Synchronization internals are split into submodules @@ -82,7 +82,7 @@ //! The sync queue processing also happens in batches, so the sync tasks can wait in the queue for some time. mod local_fs; -mod rust_s3; +mod s3_bucket; mod storage_sync; use std::{ @@ -98,7 +98,7 @@ use zenith_utils::zid::{ZTenantId, ZTenantTimelineId, ZTimelineId}; pub use self::storage_sync::index::{RemoteIndex, TimelineIndexEntry}; pub use self::storage_sync::{schedule_timeline_checkpoint_upload, schedule_timeline_download}; -use self::{local_fs::LocalFs, rust_s3::S3}; +use self::{local_fs::LocalFs, s3_bucket::S3Bucket}; use crate::layered_repository::ephemeral_file::is_ephemeral_file; use crate::{ config::{PageServerConf, RemoteStorageKind}, @@ -151,7 +151,7 @@ pub fn start_local_timeline_sync( storage_sync::spawn_storage_sync_thread( config, local_timeline_files, - S3::new(s3_config, &config.workdir)?, + S3Bucket::new(s3_config, &config.workdir)?, storage_config.max_concurrent_sync, storage_config.max_sync_errors, ) diff --git a/pageserver/src/remote_storage/README.md b/pageserver/src/remote_storage/README.md index 339ddce866..43a47e09d8 100644 --- a/pageserver/src/remote_storage/README.md +++ b/pageserver/src/remote_storage/README.md @@ -46,18 +46,6 @@ This could be avoided by a background thread/future storing the serialized index No file checksum assertion is done currently, but should be (AWS S3 returns file checksums during the `list` operation) -* sad rust-s3 api - -rust-s3 is not very pleasant to use: -1. it returns `anyhow::Result` and it's hard to distinguish "missing file" cases from "no connection" one, for instance -2. at least one function it its API that we need (`get_object_stream`) has `async` keyword and blocks (!), see details [here](https://github.com/zenithdb/zenith/pull/752#discussion_r728373091) -3. it's a prerelease library with unclear maintenance status -4. noisy on debug level - -But it's already used in the project, so for now it's reused to avoid bloating the dependency tree. -Based on previous evaluation, even `rusoto-s3` could be a better choice over this library, but needs further benchmarking. - - * gc is ignored So far, we don't adjust the remote storage based on GC thread loop results, only checkpointer loop affects the remote storage. diff --git a/pageserver/src/remote_storage/rust_s3.rs b/pageserver/src/remote_storage/s3_bucket.rs similarity index 68% rename from pageserver/src/remote_storage/rust_s3.rs rename to pageserver/src/remote_storage/s3_bucket.rs index 527bdf48ff..92b3b0cce8 100644 --- a/pageserver/src/remote_storage/rust_s3.rs +++ b/pageserver/src/remote_storage/s3_bucket.rs @@ -1,4 +1,4 @@ -//! AWS S3 storage wrapper around `rust_s3` library. +//! AWS S3 storage wrapper around `rusoto` library. //! //! Respects `prefix_in_bucket` property from [`S3Config`], //! allowing multiple pageservers to independently work with the same S3 bucket, if @@ -7,9 +7,17 @@ use std::path::{Path, PathBuf}; use anyhow::Context; -use s3::{bucket::Bucket, creds::Credentials, region::Region}; -use tokio::io::{self, AsyncWriteExt}; -use tracing::debug; +use rusoto_core::{ + credential::{InstanceMetadataProvider, StaticProvider}, + HttpClient, Region, +}; +use rusoto_s3::{ + DeleteObjectRequest, GetObjectRequest, ListObjectsV2Request, PutObjectRequest, S3Client, + StreamingBody, S3, +}; +use tokio::io; +use tokio_util::io::ReaderStream; +use tracing::{debug, trace}; use crate::{ config::S3Config, @@ -50,38 +58,50 @@ impl S3ObjectKey { } /// AWS S3 storage. -pub struct S3 { +pub struct S3Bucket { pageserver_workdir: &'static Path, - bucket: Bucket, + client: S3Client, + bucket_name: String, prefix_in_bucket: Option, } -impl S3 { - /// Creates the storage, errors if incorrect AWS S3 configuration provided. +impl S3Bucket { + /// Creates the S3 storage, errors if incorrect AWS S3 configuration provided. pub fn new(aws_config: &S3Config, pageserver_workdir: &'static Path) -> anyhow::Result { + // TODO kb check this + // Keeping a single client may cause issues due to timeouts. + // https://github.com/rusoto/rusoto/issues/1686 + debug!( - "Creating s3 remote storage around bucket {}", + "Creating s3 remote storage for S3 bucket {}", aws_config.bucket_name ); let region = match aws_config.endpoint.clone() { - Some(endpoint) => Region::Custom { - endpoint, - region: aws_config.bucket_region.clone(), + Some(custom_endpoint) => Region::Custom { + name: aws_config.bucket_region.clone(), + endpoint: custom_endpoint, }, None => aws_config .bucket_region .parse::() .context("Failed to parse the s3 region from config")?, }; - - let credentials = Credentials::new( - aws_config.access_key_id.as_deref(), - aws_config.secret_access_key.as_deref(), - None, - None, - None, - ) - .context("Failed to create the s3 credentials")?; + let request_dispatcher = HttpClient::new().context("Failed to create S3 http client")?; + let client = if aws_config.access_key_id.is_none() && aws_config.secret_access_key.is_none() + { + trace!("Using IAM-based AWS access"); + S3Client::new_with(request_dispatcher, InstanceMetadataProvider::new(), region) + } else { + trace!("Using credentials-based AWS access"); + S3Client::new_with( + request_dispatcher, + StaticProvider::new_minimal( + aws_config.access_key_id.clone().unwrap_or_default(), + aws_config.secret_access_key.clone().unwrap_or_default(), + ), + region, + ) + }; let prefix_in_bucket = aws_config.prefix_in_bucket.as_deref().map(|prefix| { let mut prefix = prefix; @@ -97,20 +117,16 @@ impl S3 { }); Ok(Self { - bucket: Bucket::new_with_path_style( - aws_config.bucket_name.as_str(), - region, - credentials, - ) - .context("Failed to create the s3 bucket")?, + client, pageserver_workdir, + bucket_name: aws_config.bucket_name.clone(), prefix_in_bucket, }) } } #[async_trait::async_trait] -impl RemoteStorage for S3 { +impl RemoteStorage for S3Bucket { type StoragePath = S3ObjectKey; fn storage_path(&self, local_path: &Path) -> anyhow::Result { @@ -129,48 +145,50 @@ impl RemoteStorage for S3 { } async fn list(&self) -> anyhow::Result> { - let list_response = self - .bucket - .list(self.prefix_in_bucket.clone().unwrap_or_default(), None) - .await - .context("Failed to list s3 objects")?; + let mut document_keys = Vec::new(); - Ok(list_response - .into_iter() - .flat_map(|response| response.contents) - .map(|s3_object| S3ObjectKey(s3_object.key)) - .collect()) + let mut continuation_token = None; + loop { + let fetch_response = self + .client + .list_objects_v2(ListObjectsV2Request { + bucket: self.bucket_name.clone(), + prefix: self.prefix_in_bucket.clone(), + continuation_token, + ..ListObjectsV2Request::default() + }) + .await?; + document_keys.extend( + fetch_response + .contents + .unwrap_or_default() + .into_iter() + .filter_map(|o| Some(S3ObjectKey(o.key?))), + ); + + match fetch_response.continuation_token { + Some(new_token) => continuation_token = Some(new_token), + None => break, + } + } + + Ok(document_keys) } async fn upload( &self, - mut from: impl io::AsyncRead + Unpin + Send + Sync + 'static, + from: impl io::AsyncRead + Unpin + Send + Sync + 'static, to: &Self::StoragePath, ) -> anyhow::Result<()> { - let mut upload_contents = io::BufWriter::new(std::io::Cursor::new(Vec::new())); - io::copy(&mut from, &mut upload_contents) - .await - .context("Failed to read the upload contents")?; - upload_contents - .flush() - .await - .context("Failed to read the upload contents")?; - let upload_contents = upload_contents.into_inner().into_inner(); - - let (_, code) = self - .bucket - .put_object(to.key(), &upload_contents) - .await - .with_context(|| format!("Failed to create s3 object with key {}", to.key()))?; - if code != 200 { - Err(anyhow::format_err!( - "Received non-200 exit code during creating object with key '{}', code: {}", - to.key(), - code - )) - } else { - Ok(()) - } + self.client + .put_object(PutObjectRequest { + body: Some(StreamingBody::new(ReaderStream::new(from))), + bucket: self.bucket_name.clone(), + key: to.key().to_owned(), + ..PutObjectRequest::default() + }) + .await?; + Ok(()) } async fn download( @@ -178,25 +196,21 @@ impl RemoteStorage for S3 { from: &Self::StoragePath, to: &mut (impl io::AsyncWrite + Unpin + Send + Sync), ) -> anyhow::Result<()> { - let (data, code) = self - .bucket - .get_object(from.key()) - .await - .with_context(|| format!("Failed to download s3 object with key {}", from.key()))?; - if code != 200 { - Err(anyhow::format_err!( - "Received non-200 exit code during downloading object, code: {}", - code - )) - } else { - // we don't have to write vector into the destination this way, `to_write_all` would be enough. - // but we want to prepare for migration on `rusoto`, that has a streaming HTTP body instead here, with - // which it makes more sense to use `io::copy`. - io::copy(&mut data.as_slice(), to) - .await - .context("Failed to write downloaded data into the destination buffer")?; - Ok(()) + let object_output = self + .client + .get_object(GetObjectRequest { + bucket: self.bucket_name.clone(), + key: from.key().to_owned(), + ..GetObjectRequest::default() + }) + .await?; + + if let Some(body) = object_output.body { + let mut from = io::BufReader::new(body.into_async_read()); + io::copy(&mut from, to).await?; } + + Ok(()) } async fn download_range( @@ -209,40 +223,37 @@ impl RemoteStorage for S3 { // S3 accepts ranges as https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35 // and needs both ends to be exclusive let end_inclusive = end_exclusive.map(|end| end.saturating_sub(1)); - let (data, code) = self - .bucket - .get_object_range(from.key(), start_inclusive, end_inclusive) - .await - .with_context(|| format!("Failed to download s3 object with key {}", from.key()))?; - if code != 206 { - Err(anyhow::format_err!( - "Received non-206 exit code during downloading object range, code: {}", - code - )) - } else { - // see `download` function above for the comment on why `Vec` buffer is copied this way - io::copy(&mut data.as_slice(), to) - .await - .context("Failed to write downloaded range into the destination buffer")?; - Ok(()) + let range = Some(match end_inclusive { + Some(end_inclusive) => format!("bytes={}-{}", start_inclusive, end_inclusive), + None => format!("bytes={}-", start_inclusive), + }); + let object_output = self + .client + .get_object(GetObjectRequest { + bucket: self.bucket_name.clone(), + key: from.key().to_owned(), + range, + ..GetObjectRequest::default() + }) + .await?; + + if let Some(body) = object_output.body { + let mut from = io::BufReader::new(body.into_async_read()); + io::copy(&mut from, to).await?; } + + Ok(()) } async fn delete(&self, path: &Self::StoragePath) -> anyhow::Result<()> { - let (_, code) = self - .bucket - .delete_object(path.key()) - .await - .with_context(|| format!("Failed to delete s3 object with key {}", path.key()))?; - if code != 204 { - Err(anyhow::format_err!( - "Received non-204 exit code during deleting object with key '{}', code: {}", - path.key(), - code - )) - } else { - Ok(()) - } + self.client + .delete_object(DeleteObjectRequest { + bucket: self.bucket_name.clone(), + key: path.key().to_owned(), + ..DeleteObjectRequest::default() + }) + .await?; + Ok(()) } } @@ -314,7 +325,7 @@ mod tests { #[test] fn storage_path_negatives() -> anyhow::Result<()> { #[track_caller] - fn storage_path_error(storage: &S3, mismatching_path: &Path) -> String { + fn storage_path_error(storage: &S3Bucket, mismatching_path: &Path) -> String { match storage.storage_path(mismatching_path) { Ok(wrong_key) => panic!( "Expected path '{}' to error, but got S3 key: {:?}", @@ -412,15 +423,11 @@ mod tests { Ok(()) } - fn dummy_storage(pageserver_workdir: &'static Path) -> S3 { - S3 { + fn dummy_storage(pageserver_workdir: &'static Path) -> S3Bucket { + S3Bucket { pageserver_workdir, - bucket: Bucket::new( - "dummy-bucket", - "us-east-1".parse().unwrap(), - Credentials::anonymous().unwrap(), - ) - .unwrap(), + client: S3Client::new("us-east-1".parse().unwrap()), + bucket_name: "dummy-bucket".to_string(), prefix_in_bucket: Some("dummy_prefix/".to_string()), } } From 0e9ee772af7406e943565a1985ef5c9117ad470c Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Mon, 28 Mar 2022 15:18:01 +0300 Subject: [PATCH 80/83] Use rusoto in safekeeper --- Cargo.lock | 3503 +++++++++++++++++++++++++++++++++++ walkeeper/Cargo.toml | 6 +- walkeeper/src/s3_offload.rs | 102 +- 3 files changed, 3573 insertions(+), 38 deletions(-) create mode 100644 Cargo.lock diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000000..1a9e261281 --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,3503 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + +[[package]] +name = "addr2line" +version = 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+tokio = { version = "1.17", features = ["macros", "fs"] } postgres-protocol = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } anyhow = "1.0" @@ -30,6 +29,9 @@ hex = "0.4.3" const_format = "0.2.21" tokio-postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="2949d98df52587d562986aad155dd4e889e408b7" } etcd-client = "0.8.3" +tokio-util = { version = "0.7", features = ["io"] } +rusoto_core = "0.47" +rusoto_s3 = "0.47" postgres_ffi = { path = "../postgres_ffi" } zenith_metrics = { path = "../zenith_metrics" } diff --git a/walkeeper/src/s3_offload.rs b/walkeeper/src/s3_offload.rs index 2b3285e6c6..c796f53615 100644 --- a/walkeeper/src/s3_offload.rs +++ b/walkeeper/src/s3_offload.rs @@ -2,19 +2,19 @@ // Offload old WAL segments to S3 and remove them locally // -use anyhow::Result; +use anyhow::Context; use postgres_ffi::xlog_utils::*; -use s3::bucket::Bucket; -use s3::creds::Credentials; -use s3::region::Region; +use rusoto_core::credential::StaticProvider; +use rusoto_core::{HttpClient, Region}; +use rusoto_s3::{ListObjectsV2Request, PutObjectRequest, S3Client, StreamingBody, S3}; use std::collections::HashSet; use std::env; -use std::fs::{self, File}; -use std::io::prelude::*; use std::path::Path; use std::time::SystemTime; +use tokio::fs::{self, File}; use tokio::runtime; use tokio::time::sleep; +use tokio_util::io::ReaderStream; use tracing::*; use walkdir::WalkDir; @@ -39,11 +39,12 @@ pub fn thread_main(conf: SafeKeeperConf) { } async fn offload_files( - bucket: &Bucket, + client: &S3Client, + bucket_name: &str, listing: &HashSet, dir_path: &Path, conf: &SafeKeeperConf, -) -> Result { +) -> anyhow::Result { let horizon = SystemTime::now() - conf.ttl.unwrap(); let mut n: u64 = 0; for entry in WalkDir::new(dir_path) { @@ -57,12 +58,17 @@ async fn offload_files( let relpath = path.strip_prefix(&conf.workdir).unwrap(); let s3path = String::from("walarchive/") + relpath.to_str().unwrap(); if !listing.contains(&s3path) { - let mut file = File::open(&path)?; - let mut content = Vec::new(); - file.read_to_end(&mut content)?; - bucket.put_object(s3path, &content).await?; + let file = File::open(&path).await?; + client + .put_object(PutObjectRequest { + body: Some(StreamingBody::new(ReaderStream::new(file))), + bucket: bucket_name.to_string(), + key: s3path, + ..PutObjectRequest::default() + }) + .await?; - fs::remove_file(&path)?; + fs::remove_file(&path).await?; n += 1; } } @@ -70,35 +76,59 @@ async fn offload_files( Ok(n) } -async fn main_loop(conf: &SafeKeeperConf) -> Result<()> { +async fn main_loop(conf: &SafeKeeperConf) -> anyhow::Result<()> { let region = Region::Custom { - region: env::var("S3_REGION").unwrap(), - endpoint: env::var("S3_ENDPOINT").unwrap(), + name: env::var("S3_REGION").context("S3_REGION env var is not set")?, + endpoint: env::var("S3_ENDPOINT").context("S3_ENDPOINT env var is not set")?, }; - let credentials = Credentials::new( - Some(&env::var("S3_ACCESSKEY").unwrap()), - Some(&env::var("S3_SECRET").unwrap()), - None, - None, - None, - ) - .unwrap(); - // Create Bucket in REGION for BUCKET - let bucket = Bucket::new_with_path_style("zenith-testbucket", region, credentials)?; + let client = S3Client::new_with( + HttpClient::new().context("Failed to create S3 http client")?, + StaticProvider::new_minimal( + env::var("S3_ACCESSKEY").context("S3_ACCESSKEY env var is not set")?, + env::var("S3_SECRET").context("S3_SECRET env var is not set")?, + ), + region, + ); + + let bucket_name = "zenith-testbucket"; loop { - // List out contents of directory - let results = bucket - .list("walarchive/".to_string(), Some("".to_string())) - .await?; - let listing = results - .iter() - .flat_map(|b| b.contents.iter().map(|o| o.key.clone())) - .collect(); - - let n = offload_files(&bucket, &listing, &conf.workdir, conf).await?; + let listing = gather_wal_entries(&client, bucket_name).await?; + let n = offload_files(&client, bucket_name, &listing, &conf.workdir, conf).await?; info!("Offload {} files to S3", n); sleep(conf.ttl.unwrap()).await; } } + +async fn gather_wal_entries( + client: &S3Client, + bucket_name: &str, +) -> anyhow::Result> { + let mut document_keys = HashSet::new(); + + let mut continuation_token = None::; + loop { + let response = client + .list_objects_v2(ListObjectsV2Request { + bucket: bucket_name.to_string(), + prefix: Some("walarchive/".to_string()), + continuation_token, + ..ListObjectsV2Request::default() + }) + .await?; + document_keys.extend( + response + .contents + .unwrap_or_default() + .into_iter() + .filter_map(|o| o.key), + ); + + continuation_token = response.continuation_token; + if continuation_token.is_none() { + break; + } + } + Ok(document_keys) +} From 4f172e7612870909613eb7c8f9c3d3a41a426618 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Sat, 9 Apr 2022 01:15:20 +0300 Subject: [PATCH 81/83] Replicate S3 blob metadata in the remote storage --- pageserver/src/remote_storage.rs | 12 +- pageserver/src/remote_storage/local_fs.rs | 188 +++++++++++++++--- pageserver/src/remote_storage/s3_bucket.rs | 12 +- .../src/remote_storage/storage_sync/upload.rs | 1 + 4 files changed, 179 insertions(+), 34 deletions(-) diff --git a/pageserver/src/remote_storage.rs b/pageserver/src/remote_storage.rs index 02d37af5de..aebd74af5a 100644 --- a/pageserver/src/remote_storage.rs +++ b/pageserver/src/remote_storage.rs @@ -325,27 +325,35 @@ trait RemoteStorage: Send + Sync { &self, from: impl io::AsyncRead + Unpin + Send + Sync + 'static, to: &Self::StoragePath, + metadata: Option, ) -> anyhow::Result<()>; /// Streams the remote storage entry contents into the buffered writer given, returns the filled writer. + /// Returns the metadata, if any was stored with the file previously. async fn download( &self, from: &Self::StoragePath, to: &mut (impl io::AsyncWrite + Unpin + Send + Sync), - ) -> anyhow::Result<()>; + ) -> anyhow::Result>; /// Streams a given byte range of the remote storage entry contents into the buffered writer given, returns the filled writer. + /// Returns the metadata, if any was stored with the file previously. async fn download_range( &self, from: &Self::StoragePath, start_inclusive: u64, end_exclusive: Option, to: &mut (impl io::AsyncWrite + Unpin + Send + Sync), - ) -> anyhow::Result<()>; + ) -> anyhow::Result>; async fn delete(&self, path: &Self::StoragePath) -> anyhow::Result<()>; } +/// Extra set of key-value pairs that contain arbitrary metadata about the storage entry. +/// Immutable, cannot be changed once the file is created. +#[derive(Debug, Clone, PartialEq, Eq)] +pub struct StorageMetadata(HashMap); + fn strip_path_prefix<'a>(prefix: &'a Path, path: &'a Path) -> anyhow::Result<&'a Path> { if prefix == path { anyhow::bail!( diff --git a/pageserver/src/remote_storage/local_fs.rs b/pageserver/src/remote_storage/local_fs.rs index bac693c8d0..846adf8e9b 100644 --- a/pageserver/src/remote_storage/local_fs.rs +++ b/pageserver/src/remote_storage/local_fs.rs @@ -5,7 +5,6 @@ //! volume is mounted to the local FS. use std::{ - ffi::OsString, future::Future, path::{Path, PathBuf}, pin::Pin, @@ -18,7 +17,7 @@ use tokio::{ }; use tracing::*; -use super::{strip_path_prefix, RemoteStorage}; +use super::{strip_path_prefix, RemoteStorage, StorageMetadata}; pub struct LocalFs { pageserver_workdir: &'static Path, @@ -54,6 +53,32 @@ impl LocalFs { ) } } + + async fn read_storage_metadata( + &self, + file_path: &Path, + ) -> anyhow::Result> { + let metadata_path = storage_metadata_path(&file_path); + if metadata_path.exists() && metadata_path.is_file() { + let metadata_string = fs::read_to_string(&metadata_path).await.with_context(|| { + format!( + "Failed to read metadata from the local storage at '{}'", + metadata_path.display() + ) + })?; + + serde_json::from_str(&metadata_string) + .with_context(|| { + format!( + "Failed to deserialize metadata from the local storage at '{}'", + metadata_path.display() + ) + }) + .map(|metadata| Some(StorageMetadata(metadata))) + } else { + Ok(None) + } + } } #[async_trait::async_trait] @@ -81,19 +106,14 @@ impl RemoteStorage for LocalFs { &self, mut from: impl io::AsyncRead + Unpin + Send + Sync + 'static, to: &Self::StoragePath, + metadata: Option, ) -> anyhow::Result<()> { let target_file_path = self.resolve_in_storage(to)?; create_target_directory(&target_file_path).await?; // We need this dance with sort of durable rename (without fsyncs) // to prevent partial uploads. This was really hit when pageserver shutdown // cancelled the upload and partial file was left on the fs - let mut temp_extension = target_file_path - .extension() - .unwrap_or_default() - .to_os_string(); - - temp_extension.push(OsString::from(".temp")); - let temp_file_path = target_file_path.with_extension(temp_extension); + let temp_file_path = path_with_suffix_extension(&target_file_path, ".temp"); let mut destination = io::BufWriter::new( fs::OpenOptions::new() .write(true) @@ -132,6 +152,23 @@ impl RemoteStorage for LocalFs { target_file_path.display() ) })?; + + if let Some(storage_metadata) = metadata { + let storage_metadata_path = storage_metadata_path(&target_file_path); + fs::write( + &storage_metadata_path, + serde_json::to_string(&storage_metadata.0) + .context("Failed to serialize storage metadata as json")?, + ) + .await + .with_context(|| { + format!( + "Failed to write metadata to the local storage at '{}'", + storage_metadata_path.display() + ) + })?; + } + Ok(()) } @@ -139,7 +176,7 @@ impl RemoteStorage for LocalFs { &self, from: &Self::StoragePath, to: &mut (impl io::AsyncWrite + Unpin + Send + Sync), - ) -> anyhow::Result<()> { + ) -> anyhow::Result> { let file_path = self.resolve_in_storage(from)?; if file_path.exists() && file_path.is_file() { @@ -162,7 +199,8 @@ impl RemoteStorage for LocalFs { ) })?; source.flush().await?; - Ok(()) + + self.read_storage_metadata(&file_path).await } else { bail!( "File '{}' either does not exist or is not a file", @@ -177,7 +215,7 @@ impl RemoteStorage for LocalFs { start_inclusive: u64, end_exclusive: Option, to: &mut (impl io::AsyncWrite + Unpin + Send + Sync), - ) -> anyhow::Result<()> { + ) -> anyhow::Result> { if let Some(end_exclusive) = end_exclusive { ensure!( end_exclusive > start_inclusive, @@ -186,7 +224,7 @@ impl RemoteStorage for LocalFs { end_exclusive ); if start_inclusive == end_exclusive.saturating_sub(1) { - return Ok(()); + return Ok(None); } } let file_path = self.resolve_in_storage(from)?; @@ -220,7 +258,8 @@ impl RemoteStorage for LocalFs { file_path.display() ) })?; - Ok(()) + + self.read_storage_metadata(&file_path).await } else { bail!( "File '{}' either does not exist or is not a file", @@ -242,6 +281,17 @@ impl RemoteStorage for LocalFs { } } +fn path_with_suffix_extension(original_path: &Path, suffix: &str) -> PathBuf { + let mut extension_with_suffix = original_path.extension().unwrap_or_default().to_os_string(); + extension_with_suffix.push(suffix); + + original_path.with_extension(extension_with_suffix) +} + +fn storage_metadata_path(original_path: &Path) -> PathBuf { + path_with_suffix_extension(original_path, ".metadata") +} + fn get_all_files<'a, P>( directory_path: P, ) -> Pin>> + Send + Sync + 'a>> @@ -451,7 +501,7 @@ mod fs_tests { use super::*; use crate::repository::repo_harness::{RepoHarness, TIMELINE_ID}; - use std::io::Write; + use std::{collections::HashMap, io::Write}; use tempfile::tempdir; #[tokio::test] @@ -465,7 +515,7 @@ mod fs_tests { ) .await?; let target_path = PathBuf::from("/").join("somewhere").join("else"); - match storage.upload(source, &target_path).await { + match storage.upload(source, &target_path, None).await { Ok(()) => panic!("Should not allow storing files with wrong target path"), Err(e) => { let message = format!("{:?}", e); @@ -475,14 +525,14 @@ mod fs_tests { } assert!(storage.list().await?.is_empty()); - let target_path_1 = upload_dummy_file(&repo_harness, &storage, "upload_1").await?; + let target_path_1 = upload_dummy_file(&repo_harness, &storage, "upload_1", None).await?; assert_eq!( storage.list().await?, vec![target_path_1.clone()], "Should list a single file after first upload" ); - let target_path_2 = upload_dummy_file(&repo_harness, &storage, "upload_2").await?; + let target_path_2 = upload_dummy_file(&repo_harness, &storage, "upload_2", None).await?; assert_eq!( list_files_sorted(&storage).await?, vec![target_path_1.clone(), target_path_2.clone()], @@ -503,12 +553,16 @@ mod fs_tests { let repo_harness = RepoHarness::create("download_file")?; let storage = create_storage()?; let upload_name = "upload_1"; - let upload_target = upload_dummy_file(&repo_harness, &storage, upload_name).await?; + let upload_target = upload_dummy_file(&repo_harness, &storage, upload_name, None).await?; let mut content_bytes = io::BufWriter::new(std::io::Cursor::new(Vec::new())); - storage.download(&upload_target, &mut content_bytes).await?; - content_bytes.flush().await?; + let metadata = storage.download(&upload_target, &mut content_bytes).await?; + assert!( + metadata.is_none(), + "No metadata should be returned for no metadata upload" + ); + content_bytes.flush().await?; let contents = String::from_utf8(content_bytes.into_inner().into_inner())?; assert_eq!( dummy_contents(upload_name), @@ -533,12 +587,16 @@ mod fs_tests { let repo_harness = RepoHarness::create("download_file_range_positive")?; let storage = create_storage()?; let upload_name = "upload_1"; - let upload_target = upload_dummy_file(&repo_harness, &storage, upload_name).await?; + let upload_target = upload_dummy_file(&repo_harness, &storage, upload_name, None).await?; let mut full_range_bytes = io::BufWriter::new(std::io::Cursor::new(Vec::new())); - storage + let metadata = storage .download_range(&upload_target, 0, None, &mut full_range_bytes) .await?; + assert!( + metadata.is_none(), + "No metadata should be returned for no metadata upload" + ); full_range_bytes.flush().await?; assert_eq!( dummy_contents(upload_name), @@ -548,7 +606,7 @@ mod fs_tests { let mut zero_range_bytes = io::BufWriter::new(std::io::Cursor::new(Vec::new())); let same_byte = 1_000_000_000; - storage + let metadata = storage .download_range( &upload_target, same_byte, @@ -556,6 +614,10 @@ mod fs_tests { &mut zero_range_bytes, ) .await?; + assert!( + metadata.is_none(), + "No metadata should be returned for no metadata upload" + ); zero_range_bytes.flush().await?; assert!( zero_range_bytes.into_inner().into_inner().is_empty(), @@ -566,7 +628,7 @@ mod fs_tests { let (first_part_local, second_part_local) = uploaded_bytes.split_at(3); let mut first_part_remote = io::BufWriter::new(std::io::Cursor::new(Vec::new())); - storage + let metadata = storage .download_range( &upload_target, 0, @@ -574,6 +636,11 @@ mod fs_tests { &mut first_part_remote, ) .await?; + assert!( + metadata.is_none(), + "No metadata should be returned for no metadata upload" + ); + first_part_remote.flush().await?; let first_part_remote = first_part_remote.into_inner().into_inner(); assert_eq!( @@ -583,7 +650,7 @@ mod fs_tests { ); let mut second_part_remote = io::BufWriter::new(std::io::Cursor::new(Vec::new())); - storage + let metadata = storage .download_range( &upload_target, first_part_local.len() as u64, @@ -591,6 +658,11 @@ mod fs_tests { &mut second_part_remote, ) .await?; + assert!( + metadata.is_none(), + "No metadata should be returned for no metadata upload" + ); + second_part_remote.flush().await?; let second_part_remote = second_part_remote.into_inner().into_inner(); assert_eq!( @@ -607,7 +679,7 @@ mod fs_tests { let repo_harness = RepoHarness::create("download_file_range_negative")?; let storage = create_storage()?; let upload_name = "upload_1"; - let upload_target = upload_dummy_file(&repo_harness, &storage, upload_name).await?; + let upload_target = upload_dummy_file(&repo_harness, &storage, upload_name, None).await?; let start = 10000; let end = 234; @@ -645,7 +717,7 @@ mod fs_tests { let repo_harness = RepoHarness::create("delete_file")?; let storage = create_storage()?; let upload_name = "upload_1"; - let upload_target = upload_dummy_file(&repo_harness, &storage, upload_name).await?; + let upload_target = upload_dummy_file(&repo_harness, &storage, upload_name, None).await?; storage.delete(&upload_target).await?; assert!(storage.list().await?.is_empty()); @@ -661,10 +733,69 @@ mod fs_tests { Ok(()) } + #[tokio::test] + async fn file_with_metadata() -> anyhow::Result<()> { + let repo_harness = RepoHarness::create("download_file")?; + let storage = create_storage()?; + let upload_name = "upload_1"; + let metadata = StorageMetadata(HashMap::from([ + ("one".to_string(), "1".to_string()), + ("two".to_string(), "2".to_string()), + ])); + let upload_target = + upload_dummy_file(&repo_harness, &storage, upload_name, Some(metadata.clone())).await?; + + let mut content_bytes = io::BufWriter::new(std::io::Cursor::new(Vec::new())); + let full_download_metadata = storage.download(&upload_target, &mut content_bytes).await?; + + content_bytes.flush().await?; + let contents = String::from_utf8(content_bytes.into_inner().into_inner())?; + assert_eq!( + dummy_contents(upload_name), + contents, + "We should upload and download the same contents" + ); + + assert_eq!( + full_download_metadata.as_ref(), + Some(&metadata), + "We should get the same metadata back for full download" + ); + + let uploaded_bytes = dummy_contents(upload_name).into_bytes(); + let (first_part_local, _) = uploaded_bytes.split_at(3); + + let mut first_part_remote = io::BufWriter::new(std::io::Cursor::new(Vec::new())); + let partial_download_metadata = storage + .download_range( + &upload_target, + 0, + Some(first_part_local.len() as u64), + &mut first_part_remote, + ) + .await?; + first_part_remote.flush().await?; + let first_part_remote = first_part_remote.into_inner().into_inner(); + assert_eq!( + first_part_local, + first_part_remote.as_slice(), + "First part bytes should be returned when requested" + ); + + assert_eq!( + partial_download_metadata.as_ref(), + Some(&metadata), + "We should get the same metadata back for partial download" + ); + + Ok(()) + } + async fn upload_dummy_file( harness: &RepoHarness<'_>, storage: &LocalFs, name: &str, + metadata: Option, ) -> anyhow::Result { let timeline_path = harness.timeline_path(&TIMELINE_ID); let relative_timeline_path = timeline_path.strip_prefix(&harness.conf.workdir)?; @@ -677,6 +808,7 @@ mod fs_tests { ) .await?, &storage_path, + metadata, ) .await?; Ok(storage_path) diff --git a/pageserver/src/remote_storage/s3_bucket.rs b/pageserver/src/remote_storage/s3_bucket.rs index 92b3b0cce8..bfd28168f4 100644 --- a/pageserver/src/remote_storage/s3_bucket.rs +++ b/pageserver/src/remote_storage/s3_bucket.rs @@ -24,6 +24,8 @@ use crate::{ remote_storage::{strip_path_prefix, RemoteStorage}, }; +use super::StorageMetadata; + const S3_FILE_SEPARATOR: char = '/'; #[derive(Debug, Eq, PartialEq)] @@ -179,12 +181,14 @@ impl RemoteStorage for S3Bucket { &self, from: impl io::AsyncRead + Unpin + Send + Sync + 'static, to: &Self::StoragePath, + metadata: Option, ) -> anyhow::Result<()> { self.client .put_object(PutObjectRequest { body: Some(StreamingBody::new(ReaderStream::new(from))), bucket: self.bucket_name.clone(), key: to.key().to_owned(), + metadata: metadata.map(|m| m.0), ..PutObjectRequest::default() }) .await?; @@ -195,7 +199,7 @@ impl RemoteStorage for S3Bucket { &self, from: &Self::StoragePath, to: &mut (impl io::AsyncWrite + Unpin + Send + Sync), - ) -> anyhow::Result<()> { + ) -> anyhow::Result> { let object_output = self .client .get_object(GetObjectRequest { @@ -210,7 +214,7 @@ impl RemoteStorage for S3Bucket { io::copy(&mut from, to).await?; } - Ok(()) + Ok(object_output.metadata.map(StorageMetadata)) } async fn download_range( @@ -219,7 +223,7 @@ impl RemoteStorage for S3Bucket { start_inclusive: u64, end_exclusive: Option, to: &mut (impl io::AsyncWrite + Unpin + Send + Sync), - ) -> anyhow::Result<()> { + ) -> anyhow::Result> { // S3 accepts ranges as https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35 // and needs both ends to be exclusive let end_inclusive = end_exclusive.map(|end| end.saturating_sub(1)); @@ -242,7 +246,7 @@ impl RemoteStorage for S3Bucket { io::copy(&mut from, to).await?; } - Ok(()) + Ok(object_output.metadata.map(StorageMetadata)) } async fn delete(&self, path: &Self::StoragePath) -> anyhow::Result<()> { diff --git a/pageserver/src/remote_storage/storage_sync/upload.rs b/pageserver/src/remote_storage/storage_sync/upload.rs index 76e92c2781..f955e04474 100644 --- a/pageserver/src/remote_storage/storage_sync/upload.rs +++ b/pageserver/src/remote_storage/storage_sync/upload.rs @@ -201,6 +201,7 @@ async fn try_upload_checkpoint< .upload( archive_streamer, &remote_storage.storage_path(&timeline_dir.join(&archive_name))?, + None, ) .await }, From dc7e3ff05af8f0d669ffe9878d5c98b2d7c8e12c Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Sat, 9 Apr 2022 01:19:45 +0300 Subject: [PATCH 82/83] Fix rustc 1.60 clippy warnings --- pageserver/src/http/routes.rs | 15 ++++++--------- pageserver/src/layered_repository.rs | 3 +-- pageserver/src/layered_repository/filename.rs | 8 ++------ pageserver/src/layered_repository/layer_map.rs | 4 +--- pageserver/src/reltag.rs | 4 +--- pageserver/src/remote_storage/local_fs.rs | 2 +- .../remote_storage/storage_sync/compression.rs | 3 +-- .../src/remote_storage/storage_sync/download.rs | 4 ++-- walkeeper/src/http/routes.rs | 6 +++--- zenith_utils/src/http/json.rs | 4 ++-- 10 files changed, 20 insertions(+), 33 deletions(-) diff --git a/pageserver/src/http/routes.rs b/pageserver/src/http/routes.rs index 207d2420bd..a0d6e922a1 100644 --- a/pageserver/src/http/routes.rs +++ b/pageserver/src/http/routes.rs @@ -68,10 +68,7 @@ fn get_config(request: &Request) -> &'static PageServerConf { // healthcheck handler async fn status_handler(request: Request) -> Result, ApiError> { let config = get_config(&request); - Ok(json_response( - StatusCode::OK, - StatusResponse { id: config.id }, - )?) + json_response(StatusCode::OK, StatusResponse { id: config.id }) } async fn timeline_create_handler(mut request: Request) -> Result, ApiError> { @@ -131,7 +128,7 @@ async fn timeline_list_handler(request: Request) -> Result, }) } - Ok(json_response(StatusCode::OK, response_data)?) + json_response(StatusCode::OK, response_data) } // Gate non incremental logical size calculation behind a flag @@ -207,7 +204,7 @@ async fn timeline_detail_handler(request: Request) -> Result) -> Result, ApiError> { @@ -247,7 +244,7 @@ async fn timeline_attach_handler(request: Request) -> Result) -> Result, ApiError> { @@ -266,7 +263,7 @@ async fn timeline_detach_handler(request: Request) -> Result) -> Result, ApiError> { @@ -280,7 +277,7 @@ async fn tenant_list_handler(request: Request) -> Result, A .await .map_err(ApiError::from_err)??; - Ok(json_response(StatusCode::OK, response_data)?) + json_response(StatusCode::OK, response_data) } async fn tenant_create_handler(mut request: Request) -> Result, ApiError> { diff --git a/pageserver/src/layered_repository.rs b/pageserver/src/layered_repository.rs index d7a250f31e..5e93e3389b 100644 --- a/pageserver/src/layered_repository.rs +++ b/pageserver/src/layered_repository.rs @@ -1474,8 +1474,7 @@ impl LayeredTimeline { // // TODO: This perhaps should be done in 'flush_frozen_layers', after flushing // *all* the layers, to avoid fsyncing the file multiple times. - let disk_consistent_lsn; - disk_consistent_lsn = Lsn(frozen_layer.get_lsn_range().end.0 - 1); + let disk_consistent_lsn = Lsn(frozen_layer.get_lsn_range().end.0 - 1); // If we were able to advance 'disk_consistent_lsn', save it the metadata file. // After crash, we will restart WAL streaming and processing from that point. diff --git a/pageserver/src/layered_repository/filename.rs b/pageserver/src/layered_repository/filename.rs index cd63f014c4..497912b408 100644 --- a/pageserver/src/layered_repository/filename.rs +++ b/pageserver/src/layered_repository/filename.rs @@ -25,9 +25,7 @@ impl PartialOrd for DeltaFileName { impl Ord for DeltaFileName { fn cmp(&self, other: &Self) -> Ordering { - let mut cmp; - - cmp = self.key_range.start.cmp(&other.key_range.start); + let mut cmp = self.key_range.start.cmp(&other.key_range.start); if cmp != Ordering::Equal { return cmp; } @@ -117,9 +115,7 @@ impl PartialOrd for ImageFileName { impl Ord for ImageFileName { fn cmp(&self, other: &Self) -> Ordering { - let mut cmp; - - cmp = self.key_range.start.cmp(&other.key_range.start); + let mut cmp = self.key_range.start.cmp(&other.key_range.start); if cmp != Ordering::Equal { return cmp; } diff --git a/pageserver/src/layered_repository/layer_map.rs b/pageserver/src/layered_repository/layer_map.rs index 8132ec9cc4..3984ee550f 100644 --- a/pageserver/src/layered_repository/layer_map.rs +++ b/pageserver/src/layered_repository/layer_map.rs @@ -296,9 +296,7 @@ impl LayerMap { key_range: &Range, lsn: Lsn, ) -> Result, Option>)>> { - let mut points: Vec; - - points = vec![key_range.start]; + let mut points = vec![key_range.start]; for l in self.historic_layers.iter() { if l.get_lsn_range().start > lsn { continue; diff --git a/pageserver/src/reltag.rs b/pageserver/src/reltag.rs index 46ff468f2f..18e26cc37a 100644 --- a/pageserver/src/reltag.rs +++ b/pageserver/src/reltag.rs @@ -39,9 +39,7 @@ impl PartialOrd for RelTag { impl Ord for RelTag { fn cmp(&self, other: &Self) -> Ordering { - let mut cmp; - - cmp = self.spcnode.cmp(&other.spcnode); + let mut cmp = self.spcnode.cmp(&other.spcnode); if cmp != Ordering::Equal { return cmp; } diff --git a/pageserver/src/remote_storage/local_fs.rs b/pageserver/src/remote_storage/local_fs.rs index 846adf8e9b..b40089d53c 100644 --- a/pageserver/src/remote_storage/local_fs.rs +++ b/pageserver/src/remote_storage/local_fs.rs @@ -58,7 +58,7 @@ impl LocalFs { &self, file_path: &Path, ) -> anyhow::Result> { - let metadata_path = storage_metadata_path(&file_path); + let metadata_path = storage_metadata_path(file_path); if metadata_path.exists() && metadata_path.is_file() { let metadata_string = fs::read_to_string(&metadata_path).await.with_context(|| { format!( diff --git a/pageserver/src/remote_storage/storage_sync/compression.rs b/pageserver/src/remote_storage/storage_sync/compression.rs index c5b041349a..511f79e0cf 100644 --- a/pageserver/src/remote_storage/storage_sync/compression.rs +++ b/pageserver/src/remote_storage/storage_sync/compression.rs @@ -201,8 +201,7 @@ pub async fn read_archive_header( .await .context("Failed to decompress a header from the archive")?; - Ok(ArchiveHeader::des(&header_bytes) - .context("Failed to deserialize a header from the archive")?) + ArchiveHeader::des(&header_bytes).context("Failed to deserialize a header from the archive") } /// Reads the archive metadata out of the archive name: diff --git a/pageserver/src/remote_storage/storage_sync/download.rs b/pageserver/src/remote_storage/storage_sync/download.rs index 32549c8650..773b4a12e5 100644 --- a/pageserver/src/remote_storage/storage_sync/download.rs +++ b/pageserver/src/remote_storage/storage_sync/download.rs @@ -225,8 +225,8 @@ async fn read_local_metadata( let local_metadata_bytes = fs::read(&local_metadata_path) .await .context("Failed to read local metadata file bytes")?; - Ok(TimelineMetadata::from_bytes(&local_metadata_bytes) - .context("Failed to read local metadata files bytes")?) + TimelineMetadata::from_bytes(&local_metadata_bytes) + .context("Failed to read local metadata files bytes") } #[cfg(test)] diff --git a/walkeeper/src/http/routes.rs b/walkeeper/src/http/routes.rs index 06a0682c37..26b23cddcc 100644 --- a/walkeeper/src/http/routes.rs +++ b/walkeeper/src/http/routes.rs @@ -31,7 +31,7 @@ struct SafekeeperStatus { async fn status_handler(request: Request) -> Result, ApiError> { let conf = get_conf(&request); let status = SafekeeperStatus { id: conf.my_id }; - Ok(json_response(StatusCode::OK, status)?) + json_response(StatusCode::OK, status) } fn get_conf(request: &Request) -> &SafeKeeperConf { @@ -106,7 +106,7 @@ async fn timeline_status_handler(request: Request) -> Result) -> Result, ApiError> { @@ -119,7 +119,7 @@ async fn timeline_create_handler(mut request: Request) -> Result Deserialize<'de>>( let whole_body = hyper::body::aggregate(request.body_mut()) .await .map_err(ApiError::from_err)?; - Ok(serde_json::from_reader(whole_body.reader()) - .map_err(|err| ApiError::BadRequest(format!("Failed to parse json request {}", err)))?) + serde_json::from_reader(whole_body.reader()) + .map_err(|err| ApiError::BadRequest(format!("Failed to parse json request {}", err))) } pub fn json_response( From 07a9553700310d6d6c2ba5c7e2e4484aeb98d899 Mon Sep 17 00:00:00 2001 From: Konstantin Knizhnik Date: Mon, 11 Apr 2022 22:30:08 +0300 Subject: [PATCH 83/83] Add test for restore from WAL (#1366) * Add test for restore from WAL * Fix python formatting * Choose unused port in wal restore test * Move recovery tests to zenith_utils/scripts * Set LD_LIBRARY_PATH in wal recovery scripts * Fix python test formatting * Fix mypy warning * Bump postgres version * Bump postgres version --- test_runner/batch_others/test_wal_restore.py | 38 +++++++++++++++++++ vendor/postgres | 2 +- zenith_utils/scripts/restore_from_wal.sh | 20 ++++++++++ .../scripts/restore_from_wal_archive.sh | 20 ++++++++++ 4 files changed, 79 insertions(+), 1 deletion(-) create mode 100644 test_runner/batch_others/test_wal_restore.py create mode 100755 zenith_utils/scripts/restore_from_wal.sh create mode 100755 zenith_utils/scripts/restore_from_wal_archive.sh diff --git a/test_runner/batch_others/test_wal_restore.py b/test_runner/batch_others/test_wal_restore.py new file mode 100644 index 0000000000..a5855f2258 --- /dev/null +++ b/test_runner/batch_others/test_wal_restore.py @@ -0,0 +1,38 @@ +import os +import subprocess + +from fixtures.utils import mkdir_if_needed +from fixtures.zenith_fixtures import (ZenithEnvBuilder, + VanillaPostgres, + PortDistributor, + PgBin, + base_dir, + vanilla_pg, + pg_distrib_dir) +from fixtures.log_helper import log + + +def test_wal_restore(zenith_env_builder: ZenithEnvBuilder, + test_output_dir, + port_distributor: PortDistributor): + zenith_env_builder.num_safekeepers = 1 + env = zenith_env_builder.init_start() + env.zenith_cli.create_branch("test_wal_restore") + pg = env.postgres.create_start('test_wal_restore') + pg.safe_psql("create table t as select generate_series(1,1000000)") + tenant_id = pg.safe_psql("show zenith.zenith_tenant")[0][0] + env.zenith_cli.pageserver_stop() + port = port_distributor.get_port() + data_dir = os.path.join(test_output_dir, 'pgsql.restored') + restored = VanillaPostgres(data_dir, PgBin(test_output_dir), port) + subprocess.call([ + 'bash', + os.path.join(base_dir, 'zenith_utils/scripts/restore_from_wal.sh'), + os.path.join(pg_distrib_dir, 'bin'), + os.path.join(test_output_dir, 'repo/safekeepers/sk1/{}/*'.format(tenant_id)), + data_dir, + str(port) + ]) + restored.start() + assert restored.safe_psql('select count(*) from t') == [(1000000, )] + restored.stop() diff --git a/vendor/postgres b/vendor/postgres index 8481459996..61afbf978b 160000 --- a/vendor/postgres +++ b/vendor/postgres @@ -1 +1 @@ -Subproject commit 848145999653be213141a330569b6f2d9f53dbf2 +Subproject commit 61afbf978b17764134ab6f1650bbdcadac147e71 diff --git a/zenith_utils/scripts/restore_from_wal.sh b/zenith_utils/scripts/restore_from_wal.sh new file mode 100755 index 0000000000..ef2171312b --- /dev/null +++ b/zenith_utils/scripts/restore_from_wal.sh @@ -0,0 +1,20 @@ +PG_BIN=$1 +WAL_PATH=$2 +DATA_DIR=$3 +PORT=$4 +SYSID=`od -A n -j 24 -N 8 -t d8 $WAL_PATH/000000010000000000000002* | cut -c 3-` +rm -fr $DATA_DIR +env -i LD_LIBRARY_PATH=$PG_BIN/../lib $PG_BIN/initdb -E utf8 -D $DATA_DIR --sysid=$SYSID +echo port=$PORT >> $DATA_DIR/postgresql.conf +REDO_POS=0x`$PG_BIN/pg_controldata -D $DATA_DIR | fgrep "REDO location"| cut -c 42-` +declare -i WAL_SIZE=$REDO_POS+114 +$PG_BIN/pg_ctl -D $DATA_DIR -l logfile start +$PG_BIN/pg_ctl -D $DATA_DIR -l logfile stop -m immediate +cp $DATA_DIR/pg_wal/000000010000000000000001 . +cp $WAL_PATH/* $DATA_DIR/pg_wal/ +if [ -f $DATA_DIR/pg_wal/*.partial ] +then + (cd $DATA_DIR/pg_wal ; for partial in \*.partial ; do mv $partial `basename $partial .partial` ; done) +fi +dd if=000000010000000000000001 of=$DATA_DIR/pg_wal/000000010000000000000001 bs=$WAL_SIZE count=1 conv=notrunc +rm -f 000000010000000000000001 diff --git a/zenith_utils/scripts/restore_from_wal_archive.sh b/zenith_utils/scripts/restore_from_wal_archive.sh new file mode 100755 index 0000000000..07f4fe1e4f --- /dev/null +++ b/zenith_utils/scripts/restore_from_wal_archive.sh @@ -0,0 +1,20 @@ +PG_BIN=$1 +WAL_PATH=$2 +DATA_DIR=$3 +PORT=$4 +SYSID=`od -A n -j 24 -N 8 -t d8 $WAL_PATH/000000010000000000000002* | cut -c 3-` +rm -fr $DATA_DIR /tmp/pg_wals +mkdir /tmp/pg_wals +env -i LD_LIBRARY_PATH=$PG_BIN/../lib $PG_BIN/initdb -E utf8 -U zenith_admin -D $DATA_DIR --sysid=$SYSID +echo port=$PORT >> $DATA_DIR/postgresql.conf +REDO_POS=0x`$PG_BIN/pg_controldata -D $DATA_DIR | fgrep "REDO location"| cut -c 42-` +declare -i WAL_SIZE=$REDO_POS+114 +cp $WAL_PATH/* /tmp/pg_wals +if [ -f $DATA_DIR/pg_wal/*.partial ] +then + (cd /tmp/pg_wals ; for partial in \*.partial ; do mv $partial `basename $partial .partial` ; done) +fi +dd if=$DATA_DIR/pg_wal/000000010000000000000001 of=/tmp/pg_wals/000000010000000000000001 bs=$WAL_SIZE count=1 conv=notrunc +echo > $DATA_DIR/recovery.signal +rm -f $DATA_DIR/pg_wal/* +echo "restore_command = 'cp /tmp/pg_wals/%f %p'" >> $DATA_DIR/postgresql.conf