Oracle Database Tips by Donald Burleson

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

What is VSD?

The HACMP method may involve the use of concurrent logical volume groups. The HACMP layer includes the concurrent logical volume manager (CLVM). HACMP/ES installation has many steps, which include:

1. Installing and setting up the hardware.

2. Installing the AIX operating system.

3. Installing the latest maintenance and required patches.

4. Installing the HACMP/ES on each node and applying patches.

General Parallel File System - GPFS

With AIX 5.1 (5L), database files can also be placed on GPFS. In this case, create a GPFS capable of holding all required database files, control files, and log files. GPFS is only supported with HACMP/ES in a RAC configuration. When placing data files on GPFS, no CRM (Concurrent Resource Manager) needs to be installed.

GPFS is a clustered file system defined over multiple nodes. GPFS is a high-performance, scalable file system designed for cluster environments. It allows users shared access to files that may span multiple disk drives on multiple nodes. It offers many of the standard UNIX file system interfaces, allowing most applications to execute without modification or recompiling. UNIX file system utilities are also supported by GPFS. It allows both parallel and serial applications running on different nodes to share data spanning multiple disk drives attached to multiple nodes. (See Figure 6.16)