Oracle RMAN is an essential component for protecting the content of Oracle Exadata. Oracle RMAN can be used to create backup sets, image copies, and incrementally updated backups of Oracle Exadata content on ZFS Storage Appliances. To optimize performance of Oracle RMAN backups from Oracle Exadata to a ZFS Storage Appliance, the database administrator should apply the following best practices:
Load balance Oracle RMAN channels evenly across the nodes of the database machine.
Load balance Oracle RMAN channels evenly across ZFS Storage Appliance shares and controllers.
To optimize buffering of the Oracle RMAN channel to the ZFS Storage Appliance, you can tune the values of several hidden instance parameters. For Oracle Database 11g Release 2, the following parameters can be tuned:
For backup and restore set:
For image copy backup and restore:
For additional information about tuning these parameters and tuning equivalent parameters for earlier versions of the Oracle Database software, see Article ID 1072545.1: RMAN Performance Tuning Using Buffer Memory Parameters) at http://support.oracle.com.
Oracle Direct NFS (dNFS) is a high-performance NFS client that delivers exceptional performance for Oracle RMAN backup and restore operations. dNFS should be configured for customers seeking maximum throughput for backup and restore operations.