Requirements for Using the Cluster File System

You can store only these files that are associated with Oracle Real Application Clusters on the cluster file system:

• Oracle RDBMS binary files

• Oracle CRS binary files

• Oracle configuration files (for example, init.ora, tnsnames.ora, listener.ora, and sqlnet.ora)

• System parameter file (SPFILE)

• Alert files (for example, alert_sid.log)

• Trace files (*.trc)

• Archived redo log files

• Flashback log files

• Oracle cluster registry (OCR) files

• Oracle CRS voting disk

You must not store data files, control files, online redo log files, or Oracle recovery files on the cluster file system.

The input/output (I/O) performance during the writing of archived redo log files is affected by the location of the device group for archived redo log files. For optimum performance, ensure that the primary of the device group for archived redo log files is located on the same node as the Oracle Real Application Clusters database instance. This device group contains the file system that holds archived redo log files of the database instance.

If you are using the cluster file system with Sun Cluster 3.1, consider increasing the desired number of secondary nodes for device groups. By increasing the desired number of secondary nodes for device groups, you can improve the availability of your cluster. To increase the desired number of secondary nodes for device groups, change the numsecondaries property. For more information, see Multiported Disk Device Groups in Sun Cluster Concepts Guide for Solaris OS.

For information about how to create cluster file systems, see the following documentation:

• Planning the Global Devices and Cluster File Systems in Sun Cluster Software Installation Guide for Solaris OS

• Configuring the Cluster in Sun Cluster Software Installation Guide for Solaris OS