Introduction to NonStop Operations Management

Glossary
Introduction to NonStop Operations Management–125507
Glossary-2
callback routine.
callback routine. A routine that allows the system to authenticate a caller’s telephone
location before permitting the caller to access the system.
catalog. A NonStop TM/MP database that contains information about audit dumps, online
dumps, and tape volumes.
change control. A systematic approach to controlling the introduction of change in the
production environment.
change management. Activities that manage the maintenance and growth of the production
system, including hardware, software, network, and procedural changes. One of the
operations disciplines in the operations management model. See operations management
model.
client/server architecture. A computer architecture that divides work between a client and a
server. The client provides application and user interface resources; the server stores,
retrieves, and protects data. Client/server architecture enables users to access shared data
and resources. Clients and servers run on a local area network. See also client/server
computing.
client/server computing. A model for distributing applications. Communication takes the
form of request and reply pairs, which are initiated by the client and serviced by the
server. Client/server computing is often used to connect different types of workstations
or personal computers to the host computer system, using supported communications
protocols. In the Tandem environment, the Remote Server Call product allows a client
process (for example, a workstation application) to access a server (for example, a
Pathway server). See also client/server architecture.
Client Server Gateway (CSG). The workstation component of the CSG/SSG message
transport mechanism. Workstation processes can use the CSG to send commands to host
server processes independently of the underlying communications protocol. DSM/NOW
uses CSG/SSG to exchange commands and responses between workstation clients and
host server processes. See also SeeView Server Gateway (SSG).
cold site. An empty building with power, air conditioning, data communications lines, and
water at the site. When a disaster occurs, you convert the cold site into a primary site by
moving all necessary equipment, software, data, and personnel to the site. Cold sites are
practical when disasters of major proportions occur.
command file. An edit file that contains a series of commands in the order you want to
execute them. To execute the commands in the file, you either use the OBEY command
and give the name of the file, or you name the file as the input file when you run TACL.
Using command files is a method of automating operations tasks.
configuration. (1) The arrangement of cabinets, system components, and peripheral devices
into a working unit.
(2) The definition or alteration of characteristics of an object.