"Else" wrote : we sacrificed the convenience to gain performance, right? | I wouldn't say that. It was way more hassle administering a DB. anonymous wrote : For the original question: when add a new broker to a running cluster, do we need to copy persistent data from other nodes? I guess no, since for load balance cluster we didn't guarantee exactly same, is it correct? | | Another question: For the existing broker in a cluster, if somehow we stopped it for a while, could we just restart it and join in to the cluster directly? we don't need to worry the data divergence between load balance cluster nodes, do we? It could happen even if the node has backup, since in the worst case the backup server could also failed, and we didn't provide facility for re-assigning a backup node with a running node. I believe you don't need to do any syncs when adding new nodes.. but I will wait for Tim Fox (the project lead) to answer that question if you don't mind. He's the wizard on this module.. and I don't want to give you a wrong answer. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4237413#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...