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dimgigov 215df1cdf3 docs: update README and all docs with formal verification, new BaraQL features, OpenTelemetry tracing

- Add Formal Verification section to README and architecture docs
- Document TLA+ specs for Raft, 2PC, MVCC, Replication
- Add new BaraQL features: JSON path (->, ->>), FTS @@, CREATE INDEX USING FTS,
  RECOVER TO TIMESTAMP, UNION/INTERSECT/EXCEPT
- Add OpenTelemetry tracing example to README
- Update Quick Start to use nimble test/bench
- Update EN and BG documentation

2026-05-07 16:06:13 +03:00

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Разпределена Система

Поддръжка за разпределено внедряване с Raft консенсус, шардиране и репликация.

Raft Консенсус

import barabadb/core/raft

var cluster = newRaftCluster()
cluster.addNode("node1")
cluster.addNode("node2")
cluster.addNode("node3")

let n1 = cluster.nodes["n1"]
n1.becomeLeader()

Шардиране

import barabadb/core/sharding

var router = newShardRouter(ShardConfig(numShards: 4, replicas: 2))
router.rebalance(@["node1", "node2", "node3"])
let shard = router.getShard("user_123")

Репликация

import barabadb/core/replication

var rm = newReplicationManager(rmSync)
rm.addReplica(newReplica("r1", "10.0.0.1", 9472))
rm.connectReplica("r1")

Формална Верификация

Разпределените алгоритми са формално специфицирани в TLA+ и проверени с TLC:

Raft Консенсус — formal-verification/raft.tla
- Проверено: ElectionSafety, StateMachineSafety
Two-Phase Commit — formal-verification/twopc.tla
- Проверено: Atomicity, NoOrphanBlocks
Репликация — formal-verification/replication.tla
- Проверено: MonotonicLsn, AcksRemovePending

Пускане на TLC:

cd formal-verification
java -cp tla2tools.jar tlc2.TLC -config models/raft.cfg raft.tla
java -cp tla2tools.jar tlc2.TLC -config models/twopc.cfg twopc.tla
java -cp tla2tools.jar tlc2.TLC -config models/replication.cfg replication.tla

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