HP XC System Software Administration Guide Version 3.1

/etc
Contains files for the configuration of the system and components of the system,
including networking information, printers, and so on.
/hptc_cluster
Reserved for the exclusive use of the HP XC System Software.
This directory is a file system that is mounted on all the nodes in the HP XC system.
This systemwide directory contains key directories and files for global system use.
See “Systemwide Directory, /hptc_cluster” (page 28) for more information.
/opt
Holds software packages from HP and other vendors.
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 29).
This directory also contains subdirectories for HP XC service configuration files. For
more information on those directories, see “HP XC Service Configuration Files”
(page 30).
/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 101)
• 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 17 (page 201) 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.
28 HP XC Administration Environment