Recovery: The Analysis Phase

• Reconstruct state at checkpoint.

  • via end_checkpoint record.

• Scan log forward from checkpoint.

  • End record: Remove Xact from Xact table.
  • Other records: Add Xact to Xact table, set lastLSN=LSN, change Xact status on commit.
  • Update record: If P not in Dirty Page Table,
    • Add P to D.P.T., set its recLSN=LSN.

Previous slide

Next slide

Back to first slide

View graphic version