HP XC System Software Administration Guide Version 3.0

Set all the cluster nodes as NIS clients. Both the master and slave NIS server are external to the cluster.
Set the head node as a NIS slave (secondary) server. The NIS master server is external to the cluster.
Nodes within the cluster use the internal server for NIS information. HP recommends this configuration
for larger systems using NIS.
Local Storage
Local storage for each node holds the operating system, a copy of the HP XC system software, and temporary
space that can be used by jobs. When possible, ensure that jobs that use local storage clean up files after
they are run. You might need to clean up temporary storage on local machines if jobs do not do so adequately.
Understanding and Maintaining the File System
The proper maintenance of the file system is crucial to the operation of the HP XC system. This section offers
guidelines for the maintenance of the file system and describes key directories.
Figure 1-2. illustrates the top of the file system hierarchy for an HP XC system.
Figure 1-2. HP XC File System Hierarchy HP XC File System Hierarchy
hptc_cluster
opt sbinetcbin
/
usr var
localbin
The basic file system layout is the same as that of the Red Hat Advanced Server 3.0 Linux file system. Additions
to the layout for the HP XC system are described in later sections.
The file system layout is structured to isolate the cluster-specific files from base operating system files, described
in “General File System Layout” (page 31). This isolation allows for flexibility and ease of potential upgrades
of the system software and keeps software from conflicting with user-installed software. The files are segregated
into the following types:
“HP XC File System Layout” (page 32)/opt/hptcHP XC specific software
“HP XC Service Configuration Files” (page 33)/opt/hptc/etcHP XC configuration data
“Systemwide Directory” (page 32)/hptc_clusterSystemwide file system
General File System Layout
The HP XC system relies on key files. Interfering with these files can cause the system to fail. The best way
to avoid this situation is to respect the placement of directories and files, especially when installing software
packages. You can avoid many pitfalls by strictly maintaining separation between the HP XC System Software
and other software. Following are the key files and directories:
/hptc_cluster Is the systemwide directory containing key directories and files for global system use.
See “Systemwide Directory” (page 32) for more information.
/bin Holds the binary executable files that any user can invoke.
/sbin Holds the binary executable files that are specifically for the system administrator or
designated privileged users.
/etc Contains files for the configuration of the system and components of the system,
including networking information, printers, and so on.
/opt Holds software packages from HP and other vendors.
Note
Local Storage 31