How do you migrate or move your RMAN backup set location to a different storage device or service?

2 Crosschecking method

The crosschecking method involves deleting the backup sets from the old location using the RMAN DELETE command with the FORCE option, and then using the RMAN BACKUP command with the FORMAT option to create new backup sets in the new location. This method frees up space in the old location and creates fresh backup sets in the new location with updated metadata. However, this method requires that you have enough space in the new location to store the new backup sets, and that you perform a full backup or an incremental backup from the last level 0 backup.

3 Choosing a method

The choice of which method to use depends on several factors, such as the size and number of your backup sets, the availability and bandwidth of your storage devices or services, the frequency and type of your backup operations, and the retention and recovery policies of your database. You should also consider the impact of each method on your RMAN repository, your backup catalog (if you use one), and your backup reports. You should test each method on a test or development database before applying it to a production database.

4 Preparing for migration

Prior to migrating or moving your RMAN backup set location, it is important to perform some preparatory steps to ensure a successful process. This includes checking the current location and status of your backup sets using the RMAN LIST or REPORT commands, verifying the integrity and usability of your backup sets using the RMAN VALIDATE or RESTORE PREVIEW commands, configuring the RMAN channels and parameters to match the new location and desired backup format and compression, backing up your control file and spfile using the RMAN BACKUP command with the CURRENT CONTROLFILE and SPFILE options, as well as backing up your RMAN repository with the RECOVERY CATALOG option (if you use a backup catalog).

5 Performing migration

After you have prepared for migration, you can perform the actual migration or moving of your RMAN backup set location using either the cataloging method or the crosschecking method as described above. You should monitor the progress and outcome of the migration using the RMAN output messages, logs, and reports. You should also verify that the new location and status of your backup sets are correct using the RMAN LIST or REPORT commands.

6 Post-migration tasks

After migrating or moving your RMAN backup set location, you should complete some post-migration tasks to ensure your database is protected and recoverable. This includes updating your backup scripts and schedules to reflect the new location and format, as well as updating your recovery procedures and documentation. Additionally, you should test your recovery scenarios with the RMAN RESTORE and RECOVER commands, and delete any obsolete or redundant backup sets from the old or new location using the RMAN DELETE command with the OBSOLETE or EXPIRED options.

7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?