Using the Cluster File System (Sun Cluster Data Service for Oracle RAC Guide for Solaris OS)

Sun Cluster Data Service for Oracle RAC Guide for Solaris OS

Using the Cluster File System

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

Planning the Global Devices, Device Groups, and Cluster File Systems in Sun Cluster Software Installation Guide for Solaris OS
Creating Cluster File Systems in Sun Cluster Software Installation Guide for Solaris OS

For information that is specific to the use of the cluster file system with Sun Cluster Support for Oracle RAC, see the subsections that follow.

Types of Oracle Files That You Can Store on the Cluster File System

You can store only these files that are associated with Oracle RAC 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

Note –

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

Optimizing Performance and Availability When Using the Cluster File System

The 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 RAC database instance. This device group contains the file system that holds archived redo log files of the database instance.

To improve the availability of your cluster, consider increasing the desired number of secondary nodes for device groups. However, increasing the desired number of secondary nodes for device groups might also impair performance. To increase the desired number of secondary nodes for device groups, change the numsecondaries property. For more information, see Multiported Device Groups in Sun Cluster Concepts Guide for Solaris OS.

How to Use the Cluster File System

Create and mount the cluster file system.

See Creating Cluster File Systems in Sun Cluster Software Installation Guide for Solaris OS for information about how to create and mount the cluster file system.

If you are using the UNIX file system (UFS), ensure that you specify the correct mount options for various types of Oracle files.

For the correct options, see the table that follows. You set these options when you add an entry to the /etc/vfstab file for the mountpoint.

File Type	Options
Oracle RDBMS binary files	`global`, `logging`
Oracle CRS binary files	`global`, `logging`
Oracle configuration files	`global`, `logging`
System parameter file (`SPFILE`)	`global`, `logging`
Alert files	`global`, `logging`
Trace files	`global`, `logging`
Archived redo log files	`global`, `logging`, `forcedirectio`
Flashback log files	`global`, `logging`, `forcedirectio`
OCR files	`global`, `logging`, `forcedirectio`
Oracle CRS voting disk	`global`, `logging`, `forcedirectio`

Next Steps

Ensure that all other storage management schemes that you are using for Oracle files are installed.

After all storage management schemes that you are using for Oracle files are installed, go to Registering and Configuring the RAC Framework Resource Group.