4.1.2 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 - Agent for Oracle if Oracle is in a load-balancing cluster system configuration

To operate PFM - Agent 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 4‒2: Example configuration of PFM - Agent for Oracle in a load-balancing cluster system

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

As with a single-node system, set up PFM - Agent for Oracle and configure it to monitor each node's Oracle Real Application Clusters instance. In this case, do not register PFM - Agent for Oracle in the cluster software.

Note:

To operate PFM - Agent for Oracle in a load-balancing cluster system and monitor the Oracle Real Application Cluster (or the Oracle Parallel Server), handle PFM - Agent for Oracle as you would in a system with many single nodes. That is, you can operate PFM - Agent for Oracle in the same way as in a typical non-cluster system.

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