John Spray 2f8a2681b8 pageserver: ensure we never try to save empty delta layer (#6805) ...

## Problem

Sharded tenants could panic during compaction when they try to generate
an L1 delta layer for a region that contains no keys on a particular
shard.

This is a variant of https://github.com/neondatabase/neon/issues/6755,
where we attempt to save a delta layer with no keys. It is harder to
reproduce than the case of image layers fixed in
https://github.com/neondatabase/neon/pull/6776.

It will become even less likely once
https://github.com/neondatabase/neon/pull/6778 tweaks keyspace
generation, but even then, we should not rely on keyspace partitioning
to guarantee at least one stored key in each partition.

## Summary of changes

- Move construction of `writer` in `compact_level0_phase1`, so that we
never leave a writer constructed but without any keys.

2024-02-19 15:07:07 +00:00

..

benches

bench_walredo: use tokio multi-threaded runtime (#6743)

2024-02-16 16:31:54 +01:00

client

storage controller: improved handling of node availability on restart (#6658)

2024-02-08 18:00:53 +00:00

ctl

live-reconfigurable virtual_file::IoEngine (#6552)

2024-02-07 17:47:55 +00:00

pagebench

per-TenantShard read throttling (#6706)

2024-02-16 21:26:59 +01:00

src

pageserver: ensure we never try to save empty delta layer (#6805)

2024-02-19 15:07:07 +00:00

test_data

Add walingest test (#5892)

2023-11-28 12:50:53 -05:00

Cargo.toml

per-TenantShard read throttling (#6706)

2024-02-16 21:26:59 +01:00