Actions Performed by the Sun Cluster Geographic Edition Software During a Switchover

When you run the geopg switchover command, the software confirms that the primary cluster does indeed hold the primary database. The command checks that the remote database is in an enabled state in the Oracle Data Guard Broker configuration. The command also confirms that the configuration is healthy by issuing the Oracle Data Guard command-line interface (dgmgrl) show configuration command to ensure that the command returns a SUCCESS state. If the output from this command indicates that Oracle Data Guard Broker is busy performing its own health check, the Oracle Data Guard command-line interface retries the command until it receives a SUCCESS response or until two minutes have passed. If the command-line interface is unable to get a SUCCESS response, the command fails. If the configuration is healthy, the software performs the following actions on the original primary cluster:

• Takes the application resource groups offline and places them in the Unmanaged state

• Performs a “switchover to standby-database-name” command for each Oracle Data Guard Broker configuration in the protection group

On the original standby cluster, the command takes the following actions:

• Runs the script that is defined in the RoleChange_ActionCmd property

• Brings all the Oracle shadow RAC server proxy resource groups and any other application resource groups online

If the command completes successfully, the standby cluster, cluster-newyork, becomes the new primary cluster for the protection group. The original primary cluster, cluster-paris, becomes the new standby cluster. Databases that are associated with the Oracle Data Guard Broker configurations of the protection group have their role reversed according to the role of the protection group on the local cluster. The Oracle shadow RAC server proxy resource group and any other application resource groups are online on the new primary cluster. Data replication from the new primary cluster to the new standby cluster begins.

This command returns an error if any of the previous operations fails. Run the geoadm status command to view the status of each component. For example, the Configuration status of the protection group might be set to Error, depending on the cause of the failure. The protection group might be activated or deactivated.

If the Configuration status of the protection group is set to Error, revalidate the protection group by using the procedures that are described in How to Validate an Oracle Data Guard Protection Group.

If the configuration of the protection group is not the same on each partner cluster, you need to resynchronize the configuration by using the procedures that are described in How to Resynchronize an Oracle Data Guard Protection Group.