AIX workload partitions (WPARs) can be configured for disaster recovery by replicating the base directory using replication methods like Hitachi TrueCopy, EMC SRDF, Veritas Volume Replicator, and so on. The network configuration for the WPAR in the primary site may not be effective in the secondary site if the two sites are in different IP subnets. Hence, you need to make these additional configuration changes to the WPAR resource.
To configure the WPAR for disaster recovery, you need to configure VCS on both the sites in the logical partitions (LPARs) with the GCO option.
Refer to the Cluster Server Administrator's Guide for more information about global clusters.
To set up the WPAR for disaster recovery
Refer to the Cluster Server Bundled Agents Reference Guide for more information about the WPAR resource.
Configure the DROpts association attribute on the WPAR resource with the following keys and site-specific values for each: DNSServers, DNSSearchPath, and DNSDomain.
Add a resource dependency from the WPAR resource to the Mount resource and another dependency from the Mount resource to the Diskgroup resource.
Examples of hardware replication agents are SRDF for EMC SRDF, HTC for Hitachi TrueCopy, MirrorView for EMC MirrorView, etc.
Refer the appropriate VCS replication agent guide for configuring the replication resource.
For VVR-based replication, add the appropriate RVGPrimary resource to the service group.
When the replication resource is online in a site, the replication agent makes sure of the following:
The underlying replicated devices are in primary mode and hence the underlying storage and eventually the WPAR's base directory is always in read-write mode.
The remote devices are in secondary mode.
When the WPAR resource goes online the resource modifies the appropriate files inside the WPAR to apply the disaster recovery-related parameters to the WPAR.