{"id":"wal-batch-single-write","text":"`append_batch()` serializes all data records plus the trailing COMMIT marker into one `bytearray` and issues a single `fd.write()` call, relying on OS write atomicity for small batches","truth_value":"IN","source":"entries/2026/05/28/topic-wal-commit-semantics.md","source_url":"","source_hash":"","justifications":[],"dependents":["wal-batch-replay-provides-atomicity"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"wal-batch-single-write","truth_value":"IN","reason":"premise"}]}}