If you are using the Sun StorageTek QFS shared file system, create one resource for each Sun StorageTek QFS metadata server. The configuration of resource groups for these resources depends on the version of Oracle that you are using.
If you are using Oracle 9i or Oracle 10g R2, the configuration of resource groups depends on the number of file systems in your configuration.
If your configuration contains a small number of file systems, create one resource group for all resources for the Sun StorageTek QFS metadata server.
If your configuration contains a large number of file systems, configure resources for the Sun StorageTek QFSmetadata server in several resource groups as follows:
Distribute resources among the resource groups to ensure optimum load balancing.
Select a different primary node for each resource group to prevent all the resource groups from being online on the same node simultaneously.
If you are using Oracle 10g, Oracle CRS manage RAC database instances. These database instances must be started only after all shared file systems are mounted.
You might use multiple file systems for database files and related files. For more information, see Sun StorageTek QFS File Systems for Database Files and Related Files. In this situation, ensure that the file system that contains the Oracle CRS voting disk is mounted only after the file systems for other database files have been mounted. This behavior ensures that, when a node is booted, Oracle CRS are started only after all Sun StorageTek QFS file systems are mounted.
If you are using Oracle 10g R1, the configuration of resource groups must ensure that Sun Cluster mounts the file systems in the required order. To meet this requirement, configure resource groups for the metadata servers of the file systems as follows:
Create the resources for the metadata servers in separate resource groups.
Set the resource group for the file system that contains the Oracle CRS voting disk to depend on the other metadata resource groups.