dimgigov
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Documentation updates: - Fix v0.1.0 → v1.1.0 version numbers in en, ru, fa, zh docs - Add missing Window Functions, Multi-Tenant ERP, Supported Keywords sections to ru, fa, zh baraql.md (~105 lines each) - Expand Turkish and Arabic baraql.md (110 → 268 lines) - Expand Turkish and Arabic installation.md (62 → 307 lines) - Add new Bulgarian documentation files (18 new files) Client updates: - Python: Full async/await rewrite with asyncio, request queueing - Rust: Full async/await rewrite with tokio, async examples - Nim: Update README to v1.1.0 - All clients now support async patterns consistently
111 lines
3.0 KiB
Markdown
111 lines
3.0 KiB
Markdown
# Разпределена Система
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BaraDB поддържа разпределено внедряване с Raft консенсус, шардиране, репликация и gossip протокол.
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## Raft Консенсус
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Leader election и log репликация:
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```nim
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import barabadb/core/raft
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var cluster = newRaftCluster()
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cluster.addNode("node1")
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cluster.addNode("node2")
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cluster.addNode("node3")
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let n1 = cluster.nodes["n1"]
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n1.becomeCandidate()
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n1.becomeLeader()
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let entry = n1.appendLog("SET key1 value1")
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```
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## Шардиране
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Разпределение на данни между възли:
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```nim
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import barabadb/core/sharding
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var router = newShardRouter(ShardConfig(
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numShards: 4,
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replicas: 2,
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strategy: ssHash
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))
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router.rebalance(@["node1", "node2", "node3"])
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let shard = router.getShard("user_123")
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```
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### Стратегии за Шардиране
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| Стратегия | Описание |
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|-----------|----------|
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| `ssHash` | Хеш-базирано шардиране |
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| `ssRange` | Range-базирано шардиране |
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| `ssConsistent` | Consistent hashing |
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## Репликация
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```nim
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import barabadb/core/replication
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var rm = newReplicationManager(rmSync)
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rm.addReplica(newReplica("r1", "10.0.0.1", 9472))
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rm.connectReplica("r1")
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let lsn = rm.writeLsn(@[1'u8, 2, 3])
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rm.ackLsn("r1", lsn)
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```
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### Режими на Репликация
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| Режим | Описание |
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|--------|----------|
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| `rmSync` | Синхронна репликация |
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| `rmAsync` | Асинхронна репликация |
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| `rmSemiSync` | Полу-синхронна репликация |
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## Gossip Протокол
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Управление на членство и детекция на откази:
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```nim
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import barabadb/core/gossip
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var g = newGossipProtocol("node1", "localhost", 9472, gossipPort = 9572)
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g.join(newGossipNode("node2", "10.0.0.2", 9472))
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```
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## Разпределени Транзакции
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Two-phase commit между възли:
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```nim
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import barabadb/core/disttxn
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var tm = newDistTxnManager()
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let txn = tm.beginTransaction("node1")
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txn.addParticipant("node2", "10.0.0.2", 9472)
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txn.prepare()
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txn.commit()
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```
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## Формална Верификация
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Основните разпределени алгоритми са формално специфицирани в TLA+ и проверени с TLC:
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- **Raft Консенсус** — `formal-verification/raft.tla`
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- Проверено: ElectionSafety, StateMachineSafety
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- **Two-Phase Commit** — `formal-verification/twopc.tla`
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- Проверено: Atomicity, NoOrphanBlocks
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- **Репликация** — `formal-verification/replication.tla`
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- Проверено: MonotonicLsn, AcksRemovePending
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Пускане на TLC локално:
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```bash
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cd formal-verification
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java -cp tla2tools.jar tlc2.TLC -config models/raft.cfg raft.tla
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java -cp tla2tools.jar tlc2.TLC -config models/twopc.cfg twopc.tla
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java -cp tla2tools.jar tlc2.TLC -config models/replication.cfg replication.tla
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```
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