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About Oracle WebLogic Server Clusters

In addition to the Java EE implementation, Oracle WebLogic Server allows you to deploy your own applications. You can configure clusters of Oracle WebLogic Server instances to distribute the load and provide extra capacity in case of hardware or other failures.

An Oracle WebLogic Server cluster consists of multiple Oracle WebLogic Server instances running simultaneously and working together to provide increased scalability and reliability. It is part of a particular Oracle WebLogic Server domain. It appears to clients as a single Oracle WebLogic Server instance. The server instances that constitute a cluster can run on the same computer or be on different computers. You can increase the capacity of a cluster by adding additional server instances to the cluster on an existing computer, or you can add computers to the cluster to host the additional server instances. Each server instance in a cluster must run the same version of Oracle WebLogic Server. For more information about domains, see About Oracle WebLogic Server Domains.