Using this feature, the backup of files; that is, the data files, archived redo logs, and the backup sets which are already backed up to a destination device type will be skipped. Such optimization is very helpful to speed up the backups and reduce the size of the backup sets, especially for read-only tablespaces. Though this is something that should work with the normal
BACKUP command, it doesn't! This option works only for the following commands:
To see whether or not you have the backup optimization option
on, you can use the
SHOW command as follows:
RMAN> SHOW BACKUP OPTIMIZATION; RMAN configuration parameters for database with db_unique_name ...