{"id":"btree-wal-replay-is-idempotent","text":"Because the B-tree WAL stores complete page images, replaying entries already applied to the data file produces identical results, making the crash window after `sync()` but before `truncate()` harmless","truth_value":"IN","source":"entries/2026/05/29/topic-write-ahead-logging-fsync-ordering.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"btree-wal-replay-is-idempotent","truth_value":"IN","reason":"premise"}]}}