The only bottleneck I can think of is on the transport layer (JGroups) when replicating to the same buddy node. Once on the buddy node, since you are talking about disjoint subtrees, there won't be any contention. Even this replication contention can be minimised if you are using async replication. At the moment BR backs up the entire state of one node onto another node. In future (see Partitioning) will allow for different regions being backed up on different nodes. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4149709#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...