dimgigov
e1bae0c7a0
- Add docs/ folder with English (en/) and Bulgarian (bg/) documentation - Create index.md with language switching and links - English docs: installation, quickstart, architecture, baraql, storage, schema, lsm, btree, vector, graph, fts, columnar, transactions, distributed, protocol, udf, api-binary, api-http, api-websocket - Bulgarian docs: installation, quickstart, architecture, baraql, schema, lsm, btree, vector, graph, fts, transactions, distributed - Update README license to BSD 3-Clause - Add LICENSE file with BSD 3-Clause text
27 lines
695 B
Markdown
27 lines
695 B
Markdown
# Транзакции & MVCC
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Multi-Version Concurrency Control със snapshot изолация.
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## Употреба
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```nim
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import barabadb/core/mvcc
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var tm = newTxnManager()
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let txn = tm.beginTxn()
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discard tm.write(txn, "key1", cast[seq[byte]]("value1"))
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discard tm.write(txn, "key2", cast[seq[byte]]("value2"))
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tm.savepoint(txn)
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discard tm.rollbackToSavepoint(txn)
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discard tm.commit(txn)
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```
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## Изолация
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BaraDB използва **snapshot isolation**:
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- Читателите не блокират писатели
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- Писателите не блокират читатели
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- Всяка транзакция вижда консистентен моментна снимка |