Oracle Tips by Burleson

Oracle10g Grid Computing with RAC
Chapter 6 - Install, Configure and Database Creation

General Parallel File System – GPFS

The GPFS daemon performs all I/O and buffer management for GPFS. This includes read-ahead for sequential reads, and write-behind for all writes not specified as synchronous. All I/O is protected by token management, which ensures that the file system on multiple nodes honors the atomicity and provides data consistency for a file system. The daemon is a multi-threaded process with some threads dedicated to specific functions.

GPFS performs all file system functions, including metadata functions, on all members of the cluster both within a file and across different files in a file system. When an inoperative node is detected by group services, GPFS fences it out using environment-specific subsystems (see disk fencing). This prevents any write operations that might interfere with recovery.

Summary

Now that we have discussed a variety of ways the cluster software is installed and configured, let us switch gears and begin looking into Oracle RAC software installation in the next section.

Oracle RAC software Installation

You should be running the CRS services, when you begin installation of the Oracle RAC Database software.

From the CD or from the software location, launch the runInstaller command.