5.10 Backing Up and Restoring Oracle Databases on Oracle VM User Domains

Backing up and restoring Oracle databases on Oracle VM user domains is the same as backing up and restoring Oracle databases on physical nodes.

• When backing up Oracle databases on Oracle VM user domains you must set the following four parameters in the /etc/sysctl.conf file on the database nodes (user domains). If you are using Oracle Exadata storage to hold the backups, the parameters need to be set in the /etc/sysctl.conf file on the Exadata storage cells as well.

  net.core.rmem_default = 4194304
  net.core.wmem_default = 4194304
  net.core.rmem_max = 4194304
  net.core.wmem_max = 4194304

• If you are using Exadata storage, each Oracle VM RAC cluster requires its own Oracle Automatic Storage Management (Oracle ASM) disk group to be designated as the fast recovery area (FRA) such as +RECO. Refer to the "Exadata Database Machine Backup and Restore Configuration and Operational Best Practices" technical reference paper for details.
• If you are using Oracle ZFS Storage Appliance, refer to the "Protecting Exadata Database Machine with the Oracle ZFS Storage Appliance: Configuration Best Practices" technical reference paper for details.