In the global cluster setup, consider a case where the primary cluster suffers a failure. The Oracle service group cannot fail over in the local cluster and must fail over globally, to a node in another cluster.
In this situation, VCS sends an alert indicating that the cluster is down.
An administrator can bring the group online in the remote cluster.
The RVGPrimary agent ensures that VVR volumes are made writable and the DNS agent ensures that name services are resolved to the remote site. The application can be started at the remote site.