HP XC System Software Administration Guide Version 3.2.1

Note:
This directory contains two separate subdirectories, one for HP XC System
Software and one for other HP software products. Make individual
directories for each vendor or software product.
/opt/hp
Is reserved for optional HP applications and utilities that apply to the HP
XC system. HP-MPI is an example of such a package.
/opt/hptc
Reserved for the exclusive use of the HP XC System Software. HP XC
specific software and associated software packages are maintained under
this directory. For more information, see “HP XC System Software Directory,
/opt/hptc” (page 32).
This directory also contains subdirectories for HP XC service configuration
files. For more information on those directories, see “HP XC Service
Configuration Files” (page 33).
/usr
Maintains a hierarchy of standard commands and files.
/usr/bin
Holds the binary executable files that any user can invoke.
/usr/sbin
Holds the binary executable files that are specifically for the system
administrator or designated privileged users.
/usr/local
Provides an area to store executable programs that were produced locally.
/var
Holds various log, spooling, and temporary storage directories.
/tmp
Provides temporary file storage.
New third-party software packages may break the system. Be sure to assign individual areas
when using relocatable software packages, that is, do not intermingle other vendors' software
with the HP XC system files directories.
1.2.1.1 Systemwide Directory, /hptc_cluster
The /hptc_cluster directory is the global file system on an HP XC system. This file system
is shared and mounted by all nodes. This directory contains configuration and log file information
that is applicable across the system; various services rely on the files in this directory. These log
files are in the /hptc_cluster/adm/logs directory.
Use the following guidelines for the /hptc_cluster directory:
Keep this directory small.
Ensure that the minimum amount of data is maintained in this directory.
Ensure that the /hptc_cluster file system utilization is less than 90 percent. You can use
the df command to determine the current value. Also, Nagios reports on high utilization
based on thresholds in the nagios_vars.ini file; for more information, see Chapter 8
(page 107)
Minimize the number of nodes that access this storage.
Do not install install software in this directory unless you are instructed to do so.
Do not use the /hptc_cluster directory for parallel job storage and synchronization.
Instead, create another file system and mount it internally. See Chapter 18 (page 219) for
more information.
Do not use this directory for home directories or user accounts.
During system installation, you are given an option to locate the /hptc_cluster file system
somewhere other than the installation on the head node. For example, you can place it on a
partition on the head node's disk, on a networked disk, on an HP SFS server, or on a SAN.
1.2 File System 31