I have a application writen for single instance for Oracle database. This application connects with Oracle via Hibernate. Connection informations are stored in hibernate.cfg.xml file (properties hibernate.connection.driver_class, hibernate.connection.username, hibernate.connection.password, hibernate.connection.url, hibernate.dialect). The application use thin driver, dont't use tnsnames.ora and don't use connection pools and data source from JBoss. Now I have to port this application to work Oracle RAC, with load balancing and TAF. What should I do? Is it possible without code modification? I have the source code but I am not the author.