Hi, (Please read patiently complete message as it belongs to this post.) Since JBoss Msg 1.2 is not available till Jan07, I am planning the following to achieve failover(manual): 1. I will deploy JBoss Messaging as an independent server hosting all my Queues. 2. The persistance for msg will be Oracle. 3. I will have a standby replica instance of the above JBoss on a different machine, that will have the same Queues and will connect to same oracle. This will be my manual failover server. And I will have a cluster of 2 JBoss 4.0.4 which will host MDBs in a cluster that will be listening to the (remote) Queues mentioned above. First of all, Please confirm that this is a workable solution. Second, As I understand from the documentation: http://wiki.jboss.org/wiki/Wiki.jsp?page=JBossMessagingUser_Deploying_a_s... Can I not achieve the same by: installing JBoss Messaging on the servers that run the MDBs and just not configure the Queues on them (will this be a complete and easier way to achieve the scoped libraries?). Then I follow the documentation: http://wiki.jboss.org/wiki/Wiki.jsp?page=JBossMessagingUser_Enabling_acce... to deploy my MDBs. Please advice. Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3974358#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...