I think you need a Region.canIgnoreEvent(Fqn fqn, NodeEventType eventType). Only having Region.putNodeEvent(NodeEvent event) is less efficient as you have to create the event object even if it will be ignored. Hmm -- if I do this cache.put(Fqn.fromString("/a/really/deeply/nested/node", "key", "value") and all the higher level nodes already exist, are any eviction events generated for "/a", "/a/really", "/a/really/deeply", "/a/really/deeply/nested"? If not there's probably no benefit to Region.canIgnoreEvent(Fqn fqn, NodeEventType eventType). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4169660#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...