SF Oracle RAC leverages the global clustering feature of VCS to enable high availability and disaster recovery (HA/DR) for businesses that span wide geographical areas. Global clusters provide protection against outages caused by large-scale disasters such as major floods, hurricanes, and earthquakes. An entire cluster can be affected by such disasters. This type of clustering involves migrating applications between clusters over a considerable distance.

You can set up HA/DR using hardware-based or software-based replication technologies.

To understand how global clusters work, review the example of an Oracle RAC database configured using global clustering. Oracle RAC is installed and configured in cluster A and cluster B. Oracle database is located on shared disks within each cluster and is replicated across clusters to ensure data concurrency. The VCS service groups for Oracle are online on a node in cluster A and are configured to fail over on cluster A and cluster B.

VCS continuously monitors and communicates events between clusters. If cluster A fails, the Oracle database is started on the remote cluster B.

For information on supported replication technologies and more information, see the Veritas Storage Foundation for Oracle RAC Installation and Configuration Guide.