Chapter 21 Recoverable Techniques - PowerPoint PPT Presentation

Chapter 21 Recoverable Techniques

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19-1. 21-2. Strategy for recoveryCatastrophic failureRestore a past copy of the databaseReconstruct a more current state by reapplying or redoing committed transaction operationsNoncatastrophic failureReverse the changes by undoing some operationsRedo some operations to restore a consistent st

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Chapter 21 Recoverable Techniques

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