Derby (aka Cloudscape) is fine and has the advantage of being around for many years. I'd trust it. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4126680#4126680 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4126680