HP XC System Software Installation Guide Version 2.1

P
parallel application
An application t hat uses a distributed programming model and can run on mu ltiple processors.
An HP XC MPI applicatio n is a parallel applicatio n. That is, all interpro cessor communication
within an HP XC para llel application is performed through calls to the M P I message passing
library.
PXE
Preboot Ex ecution Environmen t. A standard client/server interface that allows networked
computers that are not yet i nstalled with an o peratin g system to be config ured and booted
remotely. PXE booting is config ured at the BIOS level.
R
resource management role
Nodes with this role manage the allocation of resources to user applications.
role
A set of services that are assigned to a node.
Root Administration Switch
A component of the administrative network. The top switch in the Administrative Netw ork; it
may be a logical network sw itch com prised of multiple hardw a re switches. T he Ro ot Conso le
Switch is connected to the Root Administration Switch .
root node
A node within an XC system th at is connected directly to the Root Administration Switch.
RPM
Red Hat Package Manager.
1. A utility that is used for software package management on a Linux operating system, most
notably to install and remove software packages.
2. A software package that is capable of being installed or removed with the RPM software
package management utility.
S
serial application
A comman d or user program that does no t use any distributed shared-mem ory form of
parallelism. A serial application is basically a single-processor application that has no
communication library calls (for example, MPI, PVM, GM, or Portals).
An example of a serial application is a standard Linux command, such as the ls command.
Another ex amp le of a serial app lication is a program that has been built on a Linux system
that is binary compatible with the HP XC environment, but do e s not contain any of the HP
XC infrastructure libraries.
SMP
Symmetr ic multipro cessing. A system with tw o or more CPUs that share equal (symmetric)
access to all of the facilities of a computer system, such as the memory and I/O subsystems.
In an HP XC system, the use of SMP technology increases the number of CPUs (amount of
computational power) available per unit of space.
ssh
Secure Shell. A shell program for logg ing in to and executing commands on a remote computer.
It can provide secure encrypted comm unications between two untrusted hosts over an insecure
network.
Glossary-5