This section only describes the required changes to the package
control script to support the cascading failover configuration.
To create a primary package on the primary cluster, the reader
should follow the procedure in “Setting
up a Primary Package on the Primary Cluster”.
Cascading failover uses a ContinentalClusters in which the
primary cluster is configured as a metropolitan cluster. Therefore,
there are a few differences from the normal ContinentalClusters
configuration in customizing the environment file <package_name>_srdf.env.
The CLUSTER_TYPE variable should be set to "metro"
The DEVICE_GROUP variable should be set to the Symmetrix device group
name defined in the primary and secondary Symmetrix according to
what Symmetrix is directly connected to the node.
Before
executing the cmapplyconf on the primary cluster, make sure to split
the SRDF logical links, between the primary Symmetrix and the secondary
Symmetrix, for the disks associated with the application package.
Run the following command on a node that connects to the primary
Symmetrix:
# symrdf -g <prisymdevgrpname> split -v
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