How the Data Replication Layer Validates the Application Resource Groups and Data Replication Entities

During protection group validation, the Oracle Data Guard data replication layer validates the application resource groups and the data replication entities. The Oracle Data Guard data replication layer verifies the following conditions:

• That the resource group in the protection group that is being validated does not contain an Oracle RAC server proxy resource group that contains an Oracle RAC server proxy resource

  You cannot add these resource groups to an Oracle Data Guard protection group because the Oracle RAC database that is managed by the Oracle RAC server proxy resource is shut down on the standby cluster when the protection group is started globally, thus disabling the Oracle Data Guard data replication.

• That the Auto_start_on_new_cluster property in an application resource group in the protection group is set to False

  When you bring a protection group online on the primary cluster, the data replication layer brings the application resources groups that are participating in that protection group online only on the same primary cluster. Setting the Auto_start_on_new_cluster property to False prevents the Sun Cluster resource group manager from automatically starting the application resource groups. In this case, the startup of resource groups is reserved for the Sun Cluster Geographic Edition software.

  When the protection group is activated, application resource groups need to be online only on the primary cluster. Ensure that the following conditions are met:

• That the Oracle dgmgrl command is showing a SUCCESS status for the each of the Oracle Data Guard Broker configurations

  The presence of Oracle ORA- messages in the output from the dgmgrl command might indicate that the sysdba_username password is incorrect or that the cluster has been disabled. This information is reflected in the status of the replication resource for the Oracle Data Guard Broker configuration.

• That the Oracle Data Guard Broker configuration details match those held by Sun Cluster Geographic Edition

  The details to check include which cluster is primary, the configuration name, the database mode (for both the primary and standby cluster), the replication mode, and the standby type.

• That the sysdba_username password is valid for the standby cluster, to ensure that switchovers are possible

When validation is complete, the Sun Cluster Geographic Edition software creates the shadow RAC server proxy resource group and resource, the replication resource group, and the resources for this replication resource group, if they do not exist, and brings them online. If a resource group or a resource with the same name already exists, the Sun Cluster Geographic Edition operations might modify their properties. Sun Cluster Geographic Edition software cannot create a new resource group or resource of the same name if one already exists.

The Configuration status is set to OK after successful validation. If validation is not successful, the Configuration status is set to Error.