readall_records iterates files in sorted filename order; worth verifying that sequence numbers are monotonic across file boundaries, not just within a single fileDate: 2026-05-29
Time: 11:45
I don't have permission to read the target repo directly, but the observations are sufficient to answer this.
write-ahead-log/wal.py:readall_records — The actual iteration logic at line 232; observations show it exists but we couldn't read lines 200+ to see whether it does any cross-file validation or just blindly yields recordswrite-ahead-log/wal.py:truncate — Truncation deletes/rewrites WAL files based on sequence numbers; worth checking whether it can leave gaps in the filename sequence that would break sorted-order assumptionsbatch-rotation-boundary — What happens if a batch write pushes the file past maxfilesize mid-batch? The current code writes the whole batch first, but does the next append() see the oversized file and rotate before writing?write-ahead-log/wal.py:recoverseqnum — If a WAL file is corrupted mid-file (as tested in testcorruption), recovery stops reading that file at the error; any valid records after the corruption point are silently lost, which could leave seqnum lower than expectedhash-index-storage/bitcask.py — Uses a similar mayberotate pattern for data segments; comparing the two rotation strategies reveals whether the same monotonicity guarantee holds for Bitcask segment fileswal-seq-num-global-monotonic — seqnum is a single in-memory counter that only increments; all records across all WAL files share one sequence spacewal-rotation-after-write — mayberotate() is always called after the record write, never before, so a rotation boundary never splits a record's sequence number from its filewal-batch-never-spans-files — appendbatch writes the entire batch (including COMMIT) to one fd.write() call before checking rotation, so a batch is always contained within a single WAL filewal-filename-sort-equals-creation-order — WAL filenames use zero-padded 6-digit integers ({n:06d}.wal), so lexicographic sort matches numeric/creation order up to 999,999 fileswal-rotation-monotonicity-untested — test_rotation asserts record count after rotation but does not verify that sequence numbers are monotonically increasing across file boundaries