Oracle Database Tips by Donald Burleson

Oracle10g Grid Computing with RAC
Chapter 8 - RAC Administration

Management of the Oracle Cluster Registry Backup Files in Real Application Clusters

Because of the importance of OCR information, you should use the ocrconfig tool to make daily copies of the automatically generated backup files.

To make a backup, you should use the ocrconfig tool with the showbackup option to identify the backup files, and then copy each file to a location that is redundant to the location of the original OCR backup file. This ensures that there are at least two copies of each OCR backup file.

Oracle also recommends that the OCR location reside on RAID arrays. If possible, use a backup location that is shared by all nodes in the cluster. The default target location of each OCR backup file is as follows where <cluster name> is the name you assigned to the cluster when you installed CRS:

<CRS Home>/cdata/<cluster name>

You can change this location using the following syntax:

ocrconfig -backuploc <directory name>

Restoration of the OCR File from the Automatically Generated OCR Backups