HP XC System 3.x Software - Manual (Page 112)

Network
Information
Services See NIS.
NIS Network Information Services. A mechanism that enables centralization of common data that is
pertinent across multiple machines in a network. The data is collected in a domain, within which
it is accessible and relevant. The most common use of NIS is to maintain user account information
across a set of networked hosts.
NIS client Any system that queries NIS servers for NIS database information. Clients do not store and
maintain copies of the NIS maps locally for their domain.
NIS master server A system that stores the master copy of the NIS database files, or maps, for the domain in the
/var/yp/DOMAIN
directory and propagates them at regular intervals to the slave servers. Only
the master maps can be modified. Each domain can have only one master server.
NIS slave server A system that obtains and stores copies of the master server's NIS maps. These maps are updated
periodically over the network. If the master server is unavailable, the slave servers continue to
make the NIS maps available to client systems. Each domain can have multiple slave servers
distributed throughout the network.
P
parallel application An application that uses a distributed programming model and can run on multiple processors.
An HP XC MPI application is a parallel application. That is, all interprocessor communication
within an HP XC parallel application is performed through calls to the MPI message passing
library.
PXE Preboot Execution Environment. A standard client/server interface that enables networked
computers that are not yet installed with an operating system to be configured and booted
remotely. PXE booting is configured 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 administration network. The top switch in the administration network; it may
be a logical network switch comprised of multiple hardware switches. The Root Console Switch
is connected to the Root Administration Switch.
root node A node within an HP XC system that 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 command or user program that does not use any distributed shared-memory 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 example of a serial application is a program that has been built on a Linux system that
is binary compatible with the HP XC environment, but does not contain any of the HP XC
infrastructure libraries.
SLURM backup
controller The node on which the optional backup slurmctld daemon runs. On SLURM failover, this node
becomes the SLURM master controller.
SLURM master
controller The node on which the slurmctld daemon runs.
112 Glossary