jif 73a1148c9c Coordinate rollout compression with active thread writers (#44138) ...

## Why

Cold rollout files can still have active writers. Compression must not replace their files while writes are pending, including background work that outlives the local thread store.

## What changed

- Share cross-process writer locks between the rollout compressor and local thread store. Skip busy threads and recheck file state under coordination before publishing compressed files.
- Retain writer ownership through recorder background I/O and compressed rollout materialization. Wait for writers to exit on shutdown or discard, and stop queued file work before deletion.
- Route rollout metadata patches through owned recorders, reject competing writers before updating SQLite, and serialize metadata appends with shutdown.

## Testing

Add regression coverage for compression with live and detached writers, parallel cold-file compression, publication locking, metadata ownership conflicts, updates to compressed rollouts, concurrent shutdown, and discarding deferred items.

GitOrigin-RevId: c52f4037eb2019e8095b554e29bf531af95aa4bd

2026-09-09 12:30:07 +00:00

..

src

Coordinate rollout compression with active thread writers (#44138)

2026-09-09 12:30:07 +00:00

BUILD.bazel

Extract rollout into its own crate (#15548)

2026-03-24 18:10:53 -07:00

Cargo.toml

Extract persisted history types into a dedicated crate (#37871)

2026-08-10 19:26:52 +00:00