Designing Disaster Recovery Clusters using Metroclusters and Continentalclusters, Reprinted October 2011 (5900-1881)

Figure 16 Sample Cluster Configuration with Recovery Packages
Configuring Recovery Groups with Rehearsal Packages
The rehearsal package is a regular Serviceguard package configured on the recovery cluster of
the recovery group. You must configure the rehearsal package with the same volume group and
file system mount points as that of the recovery package. The application setup and configuration
used for the recovery package are also used for the rehearsal package. Similar to all other
Continentalclusters packages, the AUTO_RUN parameter for the rehearsal package must be set to
NO.
NOTE: When using physical replication, do not configure the Metrocluster environment files for
the rehearsal package.
The rehearsal package must have an IP address that is different from that of the recovery package.
If the rehearsal package has the same IP address as the recovery package, clients may connect
to the rehearsal instance mistaking it for the production instance.
IMPORTANT: Starting with Continentalclusters version A.08.00, packages specified as rehearsal
packages in recovery groups can be configured as modular packages. These packages normally
use all the modules that are used to create the recovery package. However, when using any of
the pre-integrated physical replication solutions, the replication technology specific
Continentalclusters module must not be included.
Building the Continentalclusters Configuration
If necessary, use the swinstall command to install the Continentalclusters product on all nodes
in both clusters. Then create the Continentalclusters configuration using the following steps:
• Prepare the security files.
• Create the monitor package on each cluster containing a recovery package. Clusters not
containing a recovery package may also monitor the other cluster in the recovery pair by
creating a monitor package on that cluster.
• Edit the Continentalclusters configuration file on a node of your choice in any cluster.
• Check and apply the Continentalclusters configuration.
• Start each Continentalclusters monitor package on it’s cluster.
• Validate the configuration.
• Document the recovery procedure and distribute the documentation to both sites. Make sure
all personnel are familiar with these procedures.
• Test recovery procedures.
58 Designing Continentalclusters