WebLogic server cluster

For operational simplicity, you could implement the WebLogic Server as a single (non-clustered) instance. However, for availability and performance, many installations implement a WebLogic cluster over separate physical nodes.

When creating the cluster, consider the following:

• For performance, multiple WebLogic instances in a cluster generally out-perform a single WebLogic instance on a large SMP node.
• For availability, multiple WebLogic instances spread over multiple physical nodes reduce the impact of losing a node.
• For performance, multiple WebLogic instances spread over multiple physical nodes reduce the impact of garbage collection on response times to users.
• For maintainability, set aside a bank of consecutive IP addresses for the cluster so that you can multi-home the network cards. Each WebLogic instance requires a unique IP address.