A number of architectural options are available to Oracle RAC, particularly surrounding storage. Since Oracle 11g Release 2, these options have grown, making it possible to configure the whole RAC environment using Oracle software, whereas in earlier versions third-party OS, Clusterware and storage solutions had to be used. Oracle Grid Infrastructure Bundled Agents (known as XAG) is now included with Clusterware. XAG enables automatic failover of the processes used by GoldenGate in a RAC environment, replacing the need for an action script. Before we delve into the configuration, let's start by looking at the importance of shared storage.
The secret to RAC is share everything. This applies to GoldenGate as well. RAC relies on shared storage in order to support a single database with multiple instances that reside on individual nodes. Therefore, as a minimum, the GoldenGate-bounded recovery, temporary, checkpoint, and trail files must be kept on shared storage...