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2022-07-18

2022-07-18

作者: NeverFade | 来源:发表于2022-07-18 20:39 被阅读0次

Atomicity

1.Logging: record your logs, and restore if problems occur
2.shadow paging: modify the copy of page (few systems do this, slow)

Consistency

Database consistency
Transaction consistency: application's responsibility

Isolation

interleave txn
Use concurrency control to ensure Isolation. Protocols:
1.Pessimistic: leave the problems where they are
2.Optimistic: deal with them
Correctness: equivalent serial schedule
Interleaving Conflicts: RW WR WW
equivalent conflicts

Duration

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