Increasing Availability of the Recovery Catalog

You may have a production system in which you want to maintain high availability for the catalog database. For example, you may have 100 target databases registered in the recovery catalog. In case the primary catalog database goes down, you can create redundancy by storing a secondary recovery catalog in a separate database, as illustrated in Figure 10-2. You must register the target database in the secondary catalog.

In this availability scenario, the main catalog is synchronized as normal during regular backups, while the secondary catalog is synchronized periodically with the RESYNC CATALOG command. If the primary catalog database goes down or requires routine maintenance, then you can resynchronize the secondary catalog and use it as the new primary catalog during the interim.