Clustered ASM with Clustered Diskgroups

This section contains sample configurations of single instance Oracle databases with clustered ASM instances and clustered ASM disk groups. There are two diagrams and the second diagram is a continuation of the first diagram.

The following diagram represents clustered ASM instances that serves two single instance Oracle databases, DB1 and DB2 on Node1. The databases DB1 or DB2 can use either one of the ASM disk groups DG1 and DG2 or both the disk groups as these are clustered ASM disk groups. The upper part of the diagram shows the relationships of the Oracle database instances with the clustered ASM instances on Node1 and Node2. The clustered ASM instances manage two ASM disk groups on both nodes at the same time. The lower part of the diagram represents the existing Sun Cluster resource group and resources for single instance Oracle databases and their requirement for clustered ASM services.

The dotted box represents existing Sun Cluster HA for Oracle resources with the new ASM resources. The arrows represent new dependencies between Sun Cluster HA for Oracle and clustered ASM services.

Figure 4 Clustered ASM with Clustered Disk Groups[1]

In the following diagram, a single instance Oracle database DB2 that shares ASM disk groups DG1 and DG2 is now running on Node2 after a failover of resource groups DB2-rg to Node2. The upper part of the diagram shows the relationships of the Oracle database instances with the clustered ASM instances on Node1 and Node2. The clustered ASM instances manage two ASM disk groups on both nodes at the same time. The lower part of the diagram represents the existing Sun Cluster resource group and resources for single instance Oracle databases and their requirement for clustered ASM services. If the storage type is hardware RAID, the resource types SUNW.ScaleDeviceGroup, SUNW.rac_svm and SUNW.rac_cvm is not required.

Figure 5 Clustered ASM with Clustered Disk Groups [2]