1) edit context file (vi $CONTEXT_FILE): find and change the variables: s_appldcp to ON s_applcsf to shared file system s_appltmp to valid UTL_FILE_DIR configured in database 2) Run autoconfig for all nodes 3) Check tnsnames.ora and listener.ora in $TNS_ADMIN, if exist FNDSM and FNDFS entries 4) In System Administrator Responsibility > Concurrent > Manager > Define , set primary and secundary node for all manager. 5) Set profile option 'Concurrent: PCP Instance Check' to OFF if database instance-sensitive failover is not required. By setting it to 'ON', a concurrent manager will fail over to a secondary Application tier node if the database instance to which it is connected becomes unavailable for some reason. *** There are programs (MRP and Transaction Managers for example) that are not natively support RAC Database. Some programs use DBMS_PIPE, was therefore required specific configuration for these programs