Thanks Galder! I doubt managing the number of nodes can greatly increase the difficulty of our implementation or deployment when we use Pojo cache. Or perhaps it is even not doable to dynamically manage the node numbers? I am wondering if there is a jboss product (perhaps infini-span) that overcomes the lock per FQN thing or does the dynamic node management transparently. Another extreme way is that we let each node contain one-entry-map and play with the entire tree/FQN-set in a concurrent way. Please confirm if this is feasible performance wise when using Pojo cache. Thanks, Xuetao View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4244615#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...