Slony only does master-slave replication. Setup: DBs A (master) and B (slave) AppServer cluster with both A and B in their datasource list. So in the normal case all cluster nodes connects to A (alas a shared database). Slony externally replicates the database from A to B. Now if A fails, the AppServers switch to B. (the replication terminates in the background). Question is, do I even need to replicate the JBM database to the slave? As I have no idea how JBM persists it's data, I am unsure of this. F.i. do the pre-failover messages still exist after failover if they were not replicated? i.e. these messages are lost and would cause the subscribers to miss them. If I do, then I wonder if it is possible to tell JBM to persist it's tables in a specific schema of the database in order to simplify the replication. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4246713#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...