Hi, suppose I want to cache a map of objects, that will be updated by many threads, but needs to have a fine tx control. It's acceptable to have rollbacks with concurrent access on a map key, but not on concurrent access of different keys. What is the best usage of jboss cache for this, it's own cache with optimistic control and each key as a child of root? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4078160#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...