Overview of RMAN Recovery Catalog
RMAN Recovery catalog is a schema that is created in separate DB. It contained RMAN metadata obtained from the target database control file. RMAN stores, uses, and maintains the information in the recovery catalog. The recovery catalog is maintained by RMAN when you do following Register the target database in catalog Resynchronize the catalog with control file of target DB Change the information about the backups or files. Perform backup,restore,recovery operations RMAN Catalog Contents Datafile and archived redo log file backup sets and backup pieces. Datafile copies Archive and redo log files The physical structure of the target database. Why use a recovery catalog? It makes restore if all the target database is lost, including the controlfile. As that controlfile contains all backup information, the catalog would then be used to identify a controlfile backup If an RMAN catalog is not used, the controlfile autobackup should be configured to