HP XC System 3.x Software - Manual (Page 126)

MCS An optional integrated system that uses chilled water technology to triple the standard cooling
capacity of a single rack. This system helps take the heat out of high-density deployments of
servers and blades, enabling greater densities in data centers.
Modular Cooling
System See MCS.
module A package that provides for the dynamic modification of a user's environment by means of
modulefiles.
See also modulefile.
modulefile Contains information that alters or sets shell environment variables, such as PATH and MANPATH.
Modulefiles enable various functions to start and operate properly.
MP Management Processor. Controls the system console, reset, and power management functions
on HP Integrity servers.
MPI Message Passing Interface. A library specification for message passing, proposed as a standard
by a broadly based committee of vendors, implementors, and users.
MySQL A relational database system developed by MySQL AB that is used in HP XC systems to store
and track system configuration information.
N
NAT Network Address Translation. A mechanism that provides a mapping (or transformation) of
addresses from one network to another. This enables external access of a machine on one LAN
that has the same IP address as a machine on another LAN, by mapping the LAN address of
the two machines to different external IP addresses.
Network Address
Translation See NAT.
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.
O
OA The enclosure management hardware, software, and firmware that is used to support all of the
managed devices contained within the HP BladeSystem c-Class enclosure.
onboard
administrator See see OA.
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.
126 Glossary