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pingqiuandClaude Opus 4.6
e0116fc631
All 43 actions pass on m01/m02 hardware. Auto-failover PASS. dd_write: 30s → 123ms. Post-failover write: 33,621 IOPS. 1. WAL retention: remove keepup retention floor (MinShippedLSN). WAL cannot be pinned during sustained async writes — any pin strategy either fills WAL (blocking writes) or over-recycles (breaking catch-up). Flusher recycles freely. Future LBA map will provide catch-up without WAL retention. MinShippedLSN on ShipperGroup retained as diagnostic surface. 2. Registry stale-cleanup race: add RegisteredAt grace period. Race: master registers volume → next VS heartbeat arrives before VS discovers the volume → stale cleanup deletes the entry → failover finds 0 entries. Fix: skip stale cleanup for entries registered within 30s (> 2 heartbeat intervals). 2 new tests: grace protects new entry, old entry still cleaned. 3. Shutdown heartbeat: VS disconnect heartbeat no longer claims block inventory authority. Previously, the shutdown beat's empty inventory triggered stale cleanup, deleting the entry before failover could use it. Scenario fix: recovery-baseline-failover.yaml now kills the correct node (discovered primary, not hardcoded), connects to the correct new primary for post-failover verification. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>