A cluster is a set of WebLogic servers working together, serving pages at the same port. From the user’s point of view, all of the servers function as a single server; it doesn’t matter which server handles a given request.

Virtually all production sites use clustering. Clustering provides much better performance and reliability than running on a single server. For example, if one server in a cluster goes down, the user will not be aware of it, because the other servers in the cluster can take over the sessions it was handling.

Setting up clustering of WebLogic servers running ATG applications involves the following steps:

See the BEA WebLogic documentation for information about creating WebLogic servers and clusters. For information about creating ATG server configurations, see Creating Additional Dynamo Server Instances in the Configuring Nucleus Components chapter.

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