Oracle Tips by Burleson

Oracle10g Grid Computing with RAC
Chapter 4 - Real Application Cluster Architecture

listener.ora File

If advanced features such as load balancing and automatic failover are desired, there are optional sections of the listener.ora file that must be present. For example, to configure load balancing, the listener.ora file shown in Fig. 4.14 (using an instance name of "test") would be appropriate. The listener file must be the same on the servers that are participating in the load balancing for RAC. The second listener, "listener_test1" allows use of Oracle Enterprise Manager with the instance.

You should never configure the global_dbname parameter with Oracle RAC if you wish to use connect time failover or transparent application failover. Setting this parameter will disable these capabilities.

Chapter 10 covers the setup for automatic failover. For the second server, the second listener would be called "listener_test2", and all instance specific references would be changed to "test2", while all server specific references would be changed to "testlinux2".

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