This document contains the Volume Group, Logical Volume, and File System naming standards for the IBM AIX machines. These standards were developed to provide consistancy across a wide variety of applications being run on the AIX platform. These standards also provide interoperability with the requirements of HACMP.

There are three distinct types of file systems within the "TXU" AIX architecture: file systems which reside on hard drives within each AIX machine, file systems which reside on external SAN attached storage, and NFS/NAS attached storage. File systems which reside on external SAN attached storage may be involved in an HACMP environment, so the directory mount point should be unique enterprise wide. Uniqueness is accomplished by using the name of the machine, on which the file system is normally mounted, as the first part of the directory structure of the mount point. All file systems which reside on external SAN attached storage should conform to the following template:

/serverName/sub/dir/name

As an example, an MQSeries file system normally mounted on a machine called "ddcaaega01" should have the following directory mount point:

/ddcaaega01/ibm/mqm

This insures that during an HACMP or manual failover of the file systems, that there will be no directory conflicts between applications, programs or data. Unique file system mount points ensure that a SAN file system and its associated application can be implemented on any machine in the interprise without conflict and with minimal effort.

This same concept should also be used when mounting filesystems from NFS/NAS attached storage, as depicted in the document entitled "NFS/NAS Filesystem Naming Standards".

For further information regarding the filesystem configuration of MQSeries in a High Availability environment, see the document entitled "Configuring MQSeries in an HACMP environment".