miroir/docs/research
jedarden 81155beb0d P12.OP1: Shard migration write safety — cutover race window analysis
Adds 14 chaos tests validating zero-data-loss at the migration cutover
boundary under all AE/delta-pass configurations. Two new 3-node cluster
variants exercise multi-owner shard migration with cross-node drain
tracking.

Key results: 0/1M loss with AE+delta; 0/50K loss with delta alone;
~2% hypothetical loss with neither (hard-refused by policy). The
MigrationCoordinator blocks migration when both anti-entropy and delta
pass are disabled.

Also includes: anti-entropy cross-module validation gate, warning log
when AE disabled during migration, empirical results table in
docs/trade-offs.md, and plan §15 OP#1 status update to verified.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-04-18 21:52:34 -04:00
..
consistent-hashing.md Add repo hygiene: LICENSE, CHANGELOG, .gitignore 2026-04-18 20:47:36 -04:00
distributed-search-patterns.md Add repo hygiene: LICENSE, CHANGELOG, .gitignore 2026-04-18 20:47:36 -04:00
ha-approaches.md Add repo hygiene: LICENSE, CHANGELOG, .gitignore 2026-04-18 20:47:36 -04:00
raft-task-store.md P12.OP1: Shard migration write safety — cutover race window analysis 2026-04-18 21:52:34 -04:00