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Extend replication protocol with ZentihFeedback message

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to pass current_timeline_size to compute node

Put standby_status_update fields into ZenithFeedback and send them as one message.
Pass values sizes together with keys in ZenithFeedback message.
This commit is contained in:
anastasia
2021-12-22 20:06:23 +03:00
committed by lubennikovaav
parent 63dd7bce7e
commit 5abe2129c6
13 changed files with 373 additions and 66 deletions
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28
pageserver/src/walreceiver.rs
View File

@@ -11,6 +11,7 @@ use crate::thread_mgr;
use crate::thread_mgr::ThreadKind;
use crate::walingest::WalIngest;
use anyhow::{bail, Context, Error, Result};
use bytes::BytesMut;
use lazy_static::lazy_static;
use parking_lot::Mutex;
use postgres_ffi::waldecoder::*;
@@ -27,9 +28,9 @@ use tokio_postgres::{Client, NoTls, SimpleQueryMessage, SimpleQueryRow};
use tokio_stream::StreamExt;
use tracing::*;
use zenith_utils::lsn::Lsn;
use zenith_utils::pq_proto::ZenithFeedback;
use zenith_utils::zid::ZTenantId;
use zenith_utils::zid::ZTimelineId;
//
// We keep one WAL Receiver active per timeline.
//
@@ -287,7 +288,6 @@ fn walreceiver_main(
};
if let Some(last_lsn) = status_update {
let last_lsn = PgLsn::from(u64::from(last_lsn));
let timeline_synced_disk_consistent_lsn =
tenant_mgr::get_repository_for_tenant(tenantid)?
.get_timeline_state(timelineid)
@@ -295,18 +295,32 @@ fn walreceiver_main(
.unwrap_or(Lsn(0));
// The last LSN we processed. It is not guaranteed to survive pageserver crash.
let write_lsn = last_lsn;
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 = PgLsn::from(u64::from(timeline.get_disk_consistent_lsn()));
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 = PgLsn::from(u64::from(timeline_synced_disk_consistent_lsn));
let apply_lsn = u64::from(timeline_synced_disk_consistent_lsn);
let ts = SystemTime::now();
const NO_REPLY: u8 = 0;
// Send zenith feedback message.
// Regular standby_status_update fields are put into this message.
let zenith_status_update = ZenithFeedback {
current_timeline_size: timeline.get_current_logical_size() as u64,
ps_writelsn: write_lsn,
ps_flushlsn: flush_lsn,
ps_applylsn: apply_lsn,
ps_replytime: ts,
};
debug!("zenith_status_update {:?}", zenith_status_update);
let mut data = BytesMut::new();
zenith_status_update.serialize(&mut data)?;
runtime.block_on(
physical_stream
.as_mut()
.standby_status_update(write_lsn, flush_lsn, apply_lsn, ts, NO_REPLY),
.zenith_status_update(data.len() as u64, &data),
)?;
}
}