User's Guide

NOTIFICATION SYSLOG
“CC alert: ERROR” CLUSTER_EVENT ClusterB/UP
MONITORING_CLUSTER ClusterA
CLUSTER_ALERT 0 MINUTES
NOTIFICATION SYSLOG "CC alert: UP”
Newly Created Cluster Will Run Primary Packages
After creating a new cluster to replace the damaged cluster, restore the critical applications to the
new cluster and restore the other cluster to its role as a backup for the recovered packages.
1. Configure the new cluster as a Serviceguard cluster. Use the cmviewcl command on the
surviving cluster and compare the results to the new cluster configuration. Correct any
inconsistencies on the new cluster.
2. Halt the monitor package on the surviving recovery cluster.
# cmhaltpkg ccmonpkg
3. Edit the Continentalclusters configuration file to replace the data from the old failed cluster
with data from the new cluster. Check and apply the Continentalclusters configuration.
# cmcheckconcl -v -C cmconcl.config
# cmapplyconcl -v -C cmconcl.config
4. Do the following for each recovery group where the new cluster will run the primary package:
a. Synchronize the data from the disks on the surviving recovery cluster to the disks on the
new cluster. This may be time-consuming.
b. Halt the application on the surviving recovery cluster if necessary, and start it on the new
cluster.
c. To keep application down time to a minimum, start the primary package on the cluster
before resynchronizing the data of the next recovery group.
5. If the new cluster acts as a recovery cluster for any recovery group, create a monitor package
for the new cluster.
Apply the configuration of the new monitor package.
# cmapplyconf -p ccmonpkg.config
6. Restart the monitor package on the surviving cluster.
# cmrunpkg ccmonpkg
7. View the status of the Continentalcluster.
# cmviewconcl
Newly Created Cluster Will Function as Recovery Cluster for All Recovery Groups
After replacing the failed cluster, if the downtime involved in moving the applications back is a
concern, then do the following:
• Change the surviving cluster to the role of primary cluster for all recovery groups.
• Configure the new cluster as a recovery cluster for all those groups
Configure the new cluster as a standard Serviceguard cluster, and follow the usual procedure to
configure the Continentalclusters with the new cluster used as a recovery cluster for all recovery
groups.
NOTE: In a multiple recovery pairs scenario, (where more than one primary cluster is configured
to share the same recovery cluster), reconfiguration of the recovery cluster should not be done due
to the failure of one of the primary clusters.
102 Designing Continentalclusters