Creating a Cluster
When you create a cluster, you must either migrate or delete all local stores on any of the realms participating in the cluster.
To create a cluster in the Enterprise Manager
1. Right-click the Clusters node and select Create Cluster.
2. In the Create New Cluster dialog box, specify a name for the new cluster.
Important:
The Enterprise Manager does not support working with two clusters that have the same name.
3. Add cluster members by selecting realms from the Available Realms list. Click OK.
Important:
A cluster cannot contain two realm nodes with the same node name, even if their host names and port numbers are different.
One of the selected realms becomes the master realm during the creation of the cluster. The master realm controls synchronizing the state between the other realms and acts as the authoritative source for this information.
4. Select whether to migrate local stores to cluster-wide stores or delete the local stores.
Note:
If the name of a local store is the same as the name of an existing cluster store, the cluster creation will fail due to a name clash.
The Enterprise Manager displays the new cluster and its realms in the Clusters node tree. When you select the new cluster node, you can monitor its state on the Cluster Summary tab. The tab shows the state of all cluster members and which realm is the current master.