HP DL145 HP InfiniBand Solution for Oracle RAC Environments white paper - Page 12

representative in order to gather the needed patches and information necessary to enable uDAPL and OCFS support. Verifying that the uDAPL protocol is being used for inter-node communication Once all of the Oracle software components have been successfully installed and a database has been created, the alert log can be examined to determine if the instance is using uDAPL for interinstance communication. The alert log should contain output similar to the following: db_name = orcl open_cursors = 300 pga_aggregate_target = 25165824 Mon Dec 6 11:58:42 2004 cluster interconnect IPC version: Oracle UDAPL Jul 1 2004 06:25:39 IPC Vendor 1 proto 1 Version 1.0 PMON started with pid=2, OS id=28186 DIAG started with pid=3, OS id=28191 LMON started with pid=4, OS id=28197 The cluster interconnect IPC version field indicates which protocol is being used across the interconnect. Alternatively, the following procedure can be used to determine if the database instance is using uDAPL: • Open a sqlplus session and connect as sysdba. 10.Enter the following commands at the sqlplus prompt Oradebug setmypid Oradebug ipc 11.Check the location specified in the user_dump_directory initialization parameter for the latest .trc file. Once the system has successfully been configured to use the uDAPL protocol, the installation is complete. Conclusion Due to its architecture, an Oracle RAC requires a high performance interconnect to achieve high levels of scalability. The HP InfiniBand products can be deployed to provide an Oracle Real Application Cluster with a high bandwidth, low-latency interconnect. Oracle Real Application Cluster environments have a reputation of being difficult to integrate and deploy successfully. The HP Parallel Database Cluster kit and accompanying fixed price service can greatly reduce the complexity involved in deploying an Oracle RAC system. 12