Question: What is the RMAN backup
optimization feature and how does it work?
The RMAN backup optimization feature is controlled by these
configure backup optimization on;
RMAN> configure backup optimization off;
When you turn on backup optimization, all backup commands will
skip backups of any file if it has not changed and if it has already
been backed up to the allocated device type. A file can be any
dbf file, an archived redo log or an RMAN "backup set". Here
are some of the main features of the RMAN configure backup
optimization on command:
- In order to back up the flash recovery area itself using
RMAN, you must set configure backup optimization to ON.
- Setting backup optimization on stops the backups of
Read Only Tablespaces (ROT), whenever a valid backup of the
tablespace already exists in the RMAN catalog database.
- If backup optimization is enabled, then RMAN skips
backups of archived logs that have already been backed up to the
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