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Database Recovery Techniques and Concepts

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Presentation Transcript

  1. Chapter 19 Database Recovery Techniques

  2. Recovery Concepts • Recovery Outline and Categorization of Recovery Algorithms • Caching (Buffering) of Disk Blocks • Write-Ahead Logging, Steal/No-Steal, and Force/No-Force • Checkpoints in the System Log and Fuzzy Checkpointing • Transaction Rollback

  3. Recovery Techniques Based on Deferred Update • Recovery Using Deferred Update in a Single-User Environment • Deferred Update with Concurrent Execution in a Multiuser Environment • Transaction Actions That Do Not Affect the Database

  4. Recovery Techniques Based on Immediate Update • UNDO/REDO Recovery Based on Immediate Update in a Single-User Environment • UNDO/REDO Recovery Based on Immediate Update with Concurrent Execution

  5. Shadow Paging

  6. The ARIES Recovery Algorithm

  7. Recovery in Multidatabase Systems

  8. Database Backup and Recovery from Catastrophic Failures

  9. Summary

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