{"id":"btree-wal-fsync-per-entry","text":"Each `WAL.log_write()` call performs an `fsync`, guaranteeing that WAL entries are durable before any data page writes proceed","truth_value":"IN","source":"entries/2026/05/29/topic-split-atomicity-via-wal.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"btree-wal-fsync-per-entry","truth_value":"IN","reason":"premise"}]}}