직렬화 가능 격리 (Serializable Isolation)
직렬화 가능 격리는 트랜잭션이 직렬 순서로 실행되는 것처럼 보이게 하여 데이터베이스 일관성을 유지합니다.
직렬화 가능 격리는 동시 트랜잭션이 직렬 실행 순서와 동일한 결과를 생성하도록 보장하여 더티 읽기(dirty reads), 반복 불가능한 읽기 및 팬텀 읽기를 방지합니다. 이는 일반적으로 엄격한 2단계 잠금(2PL), 타임스탬프 순서 지정 또는 직렬화 기반 접근 방식을 통해 달성됩니다.
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What is serializable isolation?
Serializable isolation is the highest isolation level where concurrent transactions behave as if they occurred in some serial order.
How is serializable isolation achieved?
Techniques include strict two-phase locking, timestamp ordering, and serialization-based approaches. Optimistic methods may be used with validation to enforce serializability.
Is serializable isolation the same as serializability of a schedule?
Yes. It guarantees that every concurrent schedule is equivalent to some serial schedule.
What is the difference between serializable isolation and snapshot isolation?
Serializable isolation guarantees no anomalies for all operations, while snapshot isolation may allow anomalies like write skew or phantoms in some workloads.