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

Update the Continentalclusters configuration file by specifying the new rehearsal package name
for the REHEARSAL_PACKAGE parameter in the recovery group definition. Distribute the
Continentalclusters configuration by reapplying the configuration file.
Removing a Package from the Continentalclusters
To remove a package from the Continentalclusters configuration, you must first remove the recovery
group from the Continentalclusters configuration file.
Removing the package does not require you to bring down either cluster. However, in order to
implement the new configuration, the following steps are required:
1. Edit the Continentalclusters configuration file, deleting the recovery group.
2. Halt the monitor packages that are running on the clusters.
3. Use the cmapplyconcl command to apply the new Continentalclusters configuration.
4. Restart the monitor packages on both clusters.
5. Use the Serviceguard cmdeleteconf command to remove each package in the recovery
group.
6. View the status of the Continentalclusters.
# cmviewconcl
Changing Monitoring Definitions
It is allowable to change the monitoring definitions in the configuration without bringing down
either cluster. This includes: adding, removing, or changing the cluster events, changing the timings,
and adding, removing, or changing the notification messages.
Use the following steps to change the monitoring definitions:
1. Edit the Continentalclusters configuration file to incorporate the new or changed monitoring
definitions.
2. Halt the monitor packages on both clusters.
3. Use the cmapplyconcl command to apply the new configuration.
4. Restart the monitor packages on both clusters.
5. View the status of the Continentalclusters.
# cmviewconcl
Checking the Status of Clusters, Nodes, and Packages
To check on the status of the Continentalclusters and associated packages, use the cmviewconcl
command, which lists the status of the clusters, associated package status, and configured events
status. This command also displays the mode of the recovery group, if configured.
The following is an example of cmviewconcl output in a situation where there is a single recovery
group for which the primary cluster is cjc838 and the recovery cluster is cjc1234.
# cmviewconcl
WARNING: Primary cluster cjc838 is in an alarm state
(cmrecovercl is enabled on recovery cluster cjc1234)
Continentalclusters cjccc1
RECOVERY CLUSTER cjc1234
PRIMARY CLUSTER STATUS EVENT LEVEL POLLING INTERVAL
cjc838 down ALARM 20
PACKAGE RECOVERY GROUP prg1
MAINTENANCE MODE NO
PACKAGE ROLE STATUS cjc838/primary primary down
108 Designing Continentalclusters