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FV-3, FV-4: 2PC coordinator crash/recovery + participant timeout

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- twopc.tla: Add coordinatorLog (persistent WAL for decisions)
- twopc.tla: Add CrashCoordinator action
- twopc.tla: Add RecoverCoordinator action (reads from coordinatorLog)
- twopc.tla: Add ParticipantTimeout (only if coordinatorLog = Nil)
- twopc.tla: Add RecoveryConsistency invariant
- models/twopc.cfg: Add RecoveryConsistency to checked invariants
- Update PLAN.md, ANALYSIS.md, README.md with new metrics
This commit is contained in:
dimgigov
2026-05-07 19:40:09 +03:00
parent 54711d0190
commit 39e07b542d
5 changed files with 71 additions and 22 deletions
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formal-verification/README.md
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@@ -26,13 +26,13 @@ This directory contains TLA+ specifications for core BaraDB distributed-systems
| Spec | States Generated | Distinct States | Depth |
|------|-----------------|-----------------|-------|
| raft.tla | 3,031,684 | 833,024 | 47 |
| twopc.tla | 2,125,825 | 262,144 | 28 |
| twopc.tla | 22,855,681 | 2,097,152 | 31 |
| mvcc.tla | 177,849 | 59,860 | 13 |
| replication.tla | 3,687,939 | 490,560 | 22 |
| gossip.tla | 1,257,121 | 110,592 | 28 |
| deadlock.tla | 3,767,361 | 263,950 | 9 |
| sharding.tla | 186,305 | 23,296 | 11 |
| **Total** | **14,234,084** | **2,043,426** | — |
| **Total** | **34,963,940** | **3,878,434** | — |
## Running the Model Checker