To configure the VCS service groups

1. Configure the disk groups under SFCFSHA or SF Oracle RAC control and set up the VCS attributes to define parallel applications in campus clusters. The CVM and Oracle service groups can be configured by editing the VCS configuration file, main.cf, to define the service groups.
2. Configure the SystemZones attribute in the service group definition as explained previously.

   See Configuring VCS service group for campus clusters.

3. Group the hosts at each physical site into a single logical SystemZone. This will enable the failover applications to try to come up on local nodes before they try to come up on a remote site.

   Not all SFCFSHA or SF Oracle RAC service groups are parallel. In the sample configuration file, hosts sys1 and sys2 should be configured in zone 0 and hosts sys3 and sys4 in zone 1. In the event of a failure, this setting instructs VCS to failover the group first within the same site and then across the sites.

4. After configuring your service groups and before putting your configuration into production, you can verify your configuration resilience by means of testing various failure scenarios.