Description: The Recovery Manager (RMAN) provides the CONFIGURE RETENTION POLICY command to create a persistent and automatic backup retention policy for controlling how long backups and copies should be retained. When a backup retention policy is in effect, RMAN considers the backups and copies of data files and control files as obsolete (i.e., the backups and copies are no longer needed for media recovery), according to the criteria specified in the CONFIGURE RETENTION POLICY command. The REPORT OBSOLETE and DELETE OBSOLETE commands can be executed periodically or regularly to view obsolete files and to delete them, respectively.
