"bstansberry(a)jboss.com" wrote : (Note there's no need to have a "PartitionGroup per session". You just have enough regions/PartitionGroups to adequately divide the failover load and then organize how the sessions are cached accordingly.) Yes, you could use a fixed number of partition groups and spread the number of sessions in each PG evenly. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4061945#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...