Understanding EclipseLink, 2.7
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Clustering and Cache Consistency

EclipseLink applications that are deployed to an application server cluster benefit from cluster scalability, load balancing, and failover. These capabilities ensure that EclipseLink applications are highly available and scale as application demand increases. EclipseLink applications are deployed the same way in application server clusters as they are in standalone server environments. However, additional planning and configuration is required to ensure cache consistency in an application server cluster.

To ensure cache consistency you perform tasks such as disabling entity caching, refreshing the cache, setting entity expiration, and setting optimistic locking on the cache. For more information on these topics, see "Task 1: Configure Cache Consistency" in Solutions Guide for EclipseLink.