HP XC System 3.x Software - Manual (Page 22)

and keeps software from conflicting with user installed software. Files are segregated into the following
types and locations:
• Software specific to HP XC is located in /opt/hptc
• HP XC configuration data is located in /opt/hptc/etc
• Clusterwide directory structure (file system) is located in /hptc_cluster
Be aware of the following information about the HP XC file system layout:
• Open source software that by default would be installed under the /usr/local directory is instead
installed in the /opt/hptc directory.
• Software installed in the /opt/hptc directory is not intended to be updated by users.
• Software packages are installed in directories under the /opt/hptc directory under their own names.
The exception to this is third-party software, which usually goes in /opt/r.
• Four directories under the /opt/hptc directory contain symbolic links to files included in the
packages:
—
/opt/hptc/bin
— /opt/hptc/sbin
— /opt/hptc/lib
— /opt/hptc/man
Each package directory should have a directory corresponding to each of these directories in which
every file has a symbolic link created in the /opt/hptc/ directory.
1.1.7 System Interconnect Network
The HP XC system interconnect provides high-speed connectivity for parallel applications. The system
interconnect network provides a high-speed communications path used primarily for user file service
and for communications within user applications that are distributed among nodes of the system. The
system interconnect network is a private network within the HP XC. Typically, every node in the HP XC
is connected to the system interconnect.
Table 1-2 indicates the types of system interconnects that are used on HP XC systems.
Table 1-2 HP XC System Interconnects
CP6000 CP4000 CP3000
X X Quadrics QSNet II®
X X Myrinet®
X X X Gigabit Ethernet®
X X X InfiniBand®
Additional information on supported system interconnects is provided in the HP XC Hardware Preparation
Guide.
1.1.8 Network Address Translation (NAT)
The HP XC system uses Network Address Translation ( NAT ) to enable nodes in the HP XC system that
do not have direct external network connections to open outbound network connections to external network
resources.
1.2 Determining System Configuration Information
You can determine various system configuration parameters with a few commands:
cat /etc/hptc-release Use the following command to display the version of the HP XC
System Software:
uname -rcat /proc/version Use either of these commands to display the Kernel version:
rpm -qa Use the following command to display the RPM s:
22 Overview of the User Environment