How does multi-version concurrency control (MVCC) work in database systems?
- Each transaction creates a new version of a modified data item.
- MVCC is only applicable to read-only transactions.
- MVCC relies on locks for data consistency.
- Only one version of a data item exists at a time.
Multi-Version Concurrency Control (MVCC) works by creating a new version of a modified data item for each transaction. This allows multiple transactions to access different versions of the same data concurrently, promoting better concurrency and reducing contention for resources.
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