Algorithms for Recovery and Isolation Exploiting Semantics: Difference between revisions
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* [[Write ahead logging]]: Any change to an object is first recorded in the [[database log|log]], and the log must be written to stable storage before changes to the object are written to disk.
* [[Repeating history during Redo]]: On restart after a crash, ARIES retraces the actions of a database before the crash and brings the system back to the exact state that it was in before the crash. Then it undoes the transactions still active at crash time.
* [[Logging changes during Undo]]: Changes made to the database while undoing transactions are logged to ensure such an action isn't repeated in the event of repeated restarts.
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