[jboss-user] [Clustering/JBoss] - Re: Doubt regarding clinet side interceptor.....

[bstansberry@jboss.com]

If your EJB tier consists of SLSBs that are only invoked from the web tier, don't make them clustered, and don't use HA-JNDI to look them up from the web tier.  JBoss is going to detect that the EJB is available in the same VM as the web tier and is going to send any call to the EJB in the same VM, which in almost all cases is the most performant solution.

If you have SFSBs, then whether to cluster them or not depends on whether you need the fault tolerance that replicating them provides. So, as cheenu2 said, you would cluster them for fault tolerance, not scalability. Clustering SFSBs carries a performance cost.

For entities, if you are caching entities beyond the life of a transaction, then you need to think about keeping the caches consistent across the cluster via cache invalidation (EJB2) or replication (EJB3).

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