Single Instance ASM with Separate Disk Groups

This section contains two sample configuration diagrams for single instance Oracle databases with single instance ASM and single instance ASM disk groups. The second diagram is a continuation of the first diagram.

The following diagram represents a single instance ASM that serves two single instance Oracle databases DB1 and DB2 on a node Node1. The database DB1 exclusively uses an ASM disk group DG1 and the database DB2 exclusively uses an ASM disk group DG2. The upper part of the diagram shows the relationships that the Oracle database instances with the single ASM instances on Node1 and Node2. The single instance ASM manages two ASM disk groups DG1 and DG2 on Node1. The lower part of the diagram represents the existing Sun Cluster resource group and resources for single instance Oracle databases and their functional requirements for single instance ASM services.

In the diagram the dotted boxes represent existing Sun Cluster HA for Oracle resources with new ASM services. Inside the nodes, new dependencies between Sun Cluster HA for Oracle resources and single instance ASM services are represented using arrows.

Figure 2 Single Instance ASM with Separate Disk Groups [1]

The following diagram is a continuation of the previous diagram in this section. In this diagram, the single instance Oracle database DB2 that exclusively uses ASM disk group DG2 is running on Node2 after a failover of resource group DB2–rg to Node2. The upper part of the diagram shows the relationships of the Oracle database instances with the single ASM instances on Node1 and Node2. The ASM disk group DG2 is now served from the single instance ASM on Node2 while ASM disk group DG1 is served by the single instance ASM on Node1.

The lower part of the diagram represents the existing Sun Cluster resource groups and resources for single instance Oracle databases and their requirement for single instance ASM services.

Figure 3 Single Instance ASM with Separate Disk Groups[2]