About OpsCenter clusters
Clusters provide high availability of applications and data to users. In a cluster, two or more nodes are linked in a network and work collectively as a single system. Each node can access the shared disks with the help of cluster software. All nodes in a cluster are constantly aware of the status of resources on the other nodes. If a node becomes unavailable, resources running on that node migrate to an available node.
OpsCenter operates in an active or a passive failover configuration. OpsCenter Server must be installed on the active node and the passive (or failover nodes). When a failover occurs in an OpsCenter cluster, OpsCenter is shut down on the active node and starts on one of the failover nodes in the cluster. During failover, users experience only a short interruption in service. This failover provides high availability for OpsCenter. You can cluster only the OpsCenter Server. Installing OpsCenter in a clustered environment makes OpsCenter a highly available application.
Use the dbdefrag utility to defragment the database in an OpsCenter cluster.
See dbdefrag.
Note:
Before you run the dbdefrag command, you need to freeze the cluster nodes.