LVS

Linux Virtual Server. Provides a centralized login capability for system users. LVS handles

 

incoming login requests and directs them to a node with a login role.

M

 

Management

See MP.

Processor

 

master host

See LSF master host.

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

See MCS.

System

 

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

See NAT.

Translation

 

Network

See NIS.

Information

 

Services

 

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.

128 Glossary