anonymous wrote : Hypersonic can work in multiple modes. TCP Server, Standalone, InMemory. | As far as I know the InMemory mode stores all your data in memory and | flushes them to the disk when you shutdown the server. (not 100% sure) The in-memory-db is a volatile db. Once closed it disappears. Perfect for unit tests so you can start with an untainted db for each test. But nothing ever gets flushed to disk as far as I know. Regards, Johan View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4064884#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...