Administration and Configuration Guide Enterprise Modeling Framework Configurations Configurations for ORE Execution Configurations for ORE Execution This is an optional step and required only if you have installed and configured Oracle R distribution and Oracle R Enterprise: Login to the Oracle Database Server. Add an entry in tnsnames.ora file with same name as that of the value set for ORACLE_SID. Note:For a RAC database, follow the aforementioned configuration in all nodes of the RAC cluster.