Upgrade Guide › WebSphere Version › Upgrade on a WebSphere Cluster › Migration on a WebSphere Cluster › Configure a WebSphere Cluster for the Upgrade

Configure a WebSphere Cluster for the Upgrade

When you install software for a WebSphere cluster, you set up the following:

• One WebSphere Deployment Manager—Manages the other federated profiles in the cell through node agents.
• One or more nodes—Each node contains one or more cluster members (also called servers), which run the CA IdentityMinder Server.
• Node agent—A process that manages communication between the Deployment Manager and the federated profile.
• Service Integration Bus—Groups resources in WebSphere to simplify administration. The WebSphere cluster is added as a member of the bus.
• Message Engine—Provides messaging functionality for members of the service integration bus. One message engine exists for the cluster.
• Message Store—Stores messages and transaction status for the message engine.
• A Web Server—Distributes the load to the appropriate server and, if SiteMinder is installed, protects access to the cluster members.

The following figure shows the relationship between the Deployment Manager, message engine, message store, nodes, and cluster members. The CA IdentityMinder Server is installed from the Deployment Manager system to each cluster member.

Note: For more information about these components, see the WebSphere System Management and Administration Redbook.