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Author SHA1 Message Date
pingqiuandClaude Opus 4.6 d5b2a3a345 fix: WALTailLSN is now an LSN boundary, ScanWALEntries uses durable checkpoint 
Finding 1: WALTailLSN semantic fix
- StatusSnapshot().WALTailLSN now reads super.WALCheckpointLSN (an LSN)
- Was: wal.Tail() which returns a physical byte offset
- Entries with LSN > WALTailLSN are guaranteed in the WAL

Finding 2: ScanWALEntries replay-source fix
- ScanWALEntries passes super.WALCheckpointLSN as the recycled boundary
- Was: flusher.CheckpointLSN() which in V1 equals CommittedLSN
- The flusher's live checkpoint may advance in memory, but entries above
  the durable superblock checkpoint are still physically in the WAL
- Normal catch-up (replica at 70, committed at 100) now works because
  fromLSN=71 > super.WALCheckpointLSN (which is the last persisted
  checkpoint, not the live flusher state)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-03-30 20:26:27 -07:00
pingqiuandClaude Opus 4.6 d5ecf471fe feat: real blockvol integration — StatusSnapshot + v2bridge reader + contract interfaces (Phase 07 P1) 
Real blockvol integration:
- BlockVol.StatusSnapshot() reads actual fields:
  WALHeadLSN ← nextLSN-1, WALTailLSN ← wal.Tail(),
  CommittedLSN ← flusher.CheckpointLSN(),
  CheckpointLSN ← super.WALCheckpointLSN,
  CheckpointTrusted ← super.Validate()==nil

weed/storage/blockvol/v2bridge/:
- Reader wraps real BlockVol, implements ReadState() → BlockVolState
- Lives in weed/ module (can import blockvol directly)

sw-block/bridge/blockvol/ contract interfaces:
- BlockVolReader: ReadState() (weed-side implements)
- BlockVolPinner: HoldWALRetention/HoldSnapshot/HoldFullBase → release func
- BlockVolExecutor: StreamWALEntries/TransferSnapshot/TransferFullBase/TruncateWAL
- StorageAdapter refactored to consume interfaces (not push-based)
- PushStorageAdapter for tests

Handoff boundary (E5):
- sw-block/ defines contracts, weed/ implements them
- sw-block/ does NOT import weed/
- No cross-module circular dependency

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-03-30 18:17:59 -07:00