Q&As: Incremental Backup



(Q) What are the characteristics of Incremental Backups?


  • Store only blocks changed since a previous incremental (Level 0 or Level 1) backup
  • Provide more compact backups and faster recovery
  • Less redo logs are applied during recovery
  • If you enable block change tracking, then full table scans on input files will not be performed during recovery
  • You can take a Level 0 or Level 1 Incremental Backup

$ rman
RMAN> CONNECT TARGET /
RMAN> BACKUP
       INCREMENTAL LEVEL 1 CUMULATIVE
       SKIP INACCESSIBLE
       DATABASE;

The example above:
  • Backs up all blocks changed since the most recent LEVEL 0 incremental backup.
  • If no LEVEL 0 backup exists, RMAN makes a LEVEL 0 automatically.
  • Inaccessible files are skipped

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