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Flash Recovery Area:
Benefits
Simplifies management
- Auto-delete files when space needed
- Obsolete backup sets, archive logs
- Files backed up to tape
- Issues warnings when space constrained
Easy to backup all recovery-related files to tape
Notes:
The flash recovery area can simplify database management. For example, the database automatically deletes obsolete logs and backup sets when space is required, removing the need for the DBA to manage (e.g. clean-up) the disks containing these files. Recovery-related files become obsolete when they exceed the RMAN retention policy or have been backed up to tape. Refer to the next page to see the alert log error message issued if the flash recovery area begins to run out of space.
Another new RMAN command provides a convenient technique for backing up the recovery area to tape (tape is the mandatory destination for this command). This is accomplished with the “BACKUP RECOVERY AREA” command (BACKUP DB_RECOVERY_FILE_DEST is a synonym for BACKUP RECOVERY AREA). Files in the flash recovery area that are backed up to tape are retained on disk but are eligible for deletion if space becomes constrained. Refer to the BACKUP command in the Oracle® Database Recovery Manager Reference 10g (Release 2) for more information.
Oracle 10g RMAN also introduces the BACKUP RECOVERY FILES command. This command backups all disk-based recovery files to tape, whether they are in the flash recovery area or not.
Notes for this slide continue on the next page…