Delete clusters

Use this task to remove a cluster and all of its cluster members.

Removing a cluster deletes the cluster and all associated cluster members. When we delete a cluster, there is no option to keep certain cluster members or applications that we have installed on any part of the cluster.

(ZOS) In a production environment, avoid deleting clusters that are carrying workload. We can, however, add and remove cluster members during production. When we want to remove a cluster, create a new cluster, adding new members while the old cluster is still operational. After the new cluster is working, remove the cluster members from the old cluster and then delete the cluster.

Tip: If the cluster we are removing has applications or modules mapped to it, remap the modules to another cluster, or create a new cluster and remap the modules to the new cluster, before removing the old cluster. After a cluster to which modules are mapped is deleted, the modules cannot be remapped to another cluster. Therefore, if we do not remap the modules to another cluster before deleting the old one, uninstall all of the modules that were mapped to the old cluster, and then reinstall them on a different cluster.

Tasks

1. In the administrative console, click...

           Servers > Clusters > WebSphere application server clusters.

2. Make sure the cluster we want to remove is stopped.

   If the cluster is started, stop the cluster.

3. Delete the cluster. Select the cluster we want to delete, and click Delete.
4. Click OK and then click Review to preview our changes.

5. Select Synchronize changes with Nodes> Save to save the changes.

The cluster and all of the cluster members are deleted.

Subtopics

• Delete specific cluster members
  Use this task to remove a cluster member from an existing cluster. Removing a cluster member deletes the associated application server.

Deleting specific cluster members

Balancing workloads