3.1.2 Load-balancing cluster system

(1) Configuration of Oracle in a load-balancing cluster system (Oracle Real Application Clusters)

Oracle Real Application Clusters (or Oracle Parallel Server) is a system consisting of multiple nodes running Oracle that function as a single Oracle system that processes a single database. The data is stored on a shared disk and is shared by all nodes.

Distribution of workload to multiple nodes improves scalability and fault tolerance.

Although applications see the set of nodes as a single Oracle system, each node runs an Oracle system with a unique instance name. For example, a database might be run by Oracle instances SID=ora1 at node1 and SID=ora2 at node2. Applications use a global database name to access the database via Oracle Net Services.

For details about Oracle Real Application Clusters (or Oracle Parallel Server), see your Oracle documentation.

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(2) Configuration of PFM - RM for Oracle if Oracle is in a load-balancing cluster system configuration

To operate PFM - RM for Oracle in a non-cluster system if Oracle is operating in a load-balancing cluster system, use a configuration such as that shown in the following figure.

Figure 3‒3: Example configuration of PFM - RM for Oracle in a load-balancing cluster system

An Oracle system with a unique instance name is run on each node. PFM - RM for Oracle monitors the Oracle instance on each node.

As with a single-node system, set up PFM - RM for Oracle and configure it to monitor each node's Oracle Real Application Clusters instance.

Note:

If Oracle is operating in a load-balancing cluster system, you can operate PFM - RM for Oracle in a non-cluster system in the same way as in a system that consists of multiple stand-alone nodes. That is, you can operate PFM - RM for Oracle in the same way as in a typical non-cluster system. In this case, do not register PFM - RM for Oracle in the cluster software.

If Oracle is operating in a load-balancing cluster system, you can operate PFM - RM for Oracle in an HA cluster configuration. For information about how to operate PFM - RM for Oracle in an HA cluster configuration, see 3.1.1(2) PFM - RM for Oracle configuration in an HA cluster system. Note that when you do this, set up the PFM - RM for Oracle instance to monitor the Oracle Real Application Clusters instance on each node in the same way as in a non-cluster configuration.

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