In jboss.xml, for each clustered bean: | <clustered>true</clustered> | <cluster-config> | <partition-name>mypartition</partition-name> | </cluster-config> | This is supported, I believe, since RC9; before it wasn't. In the next EJB3 release, if you just use the plain @Clustered annotation (no attribute), it will default to the partition named by system property jboss.partition.name (i.e. the property that's set by the -g startup switch.) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4026622#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...