Availability Guide for Application Design

Glossary
Availability Guide for Application Design—525637-004
Glossary-14
Network Control Language (NCL)
programmers from having to write programs for specific LAN protocols. See also
Multilan.
Network Control Language (NCL). A structured, high-level language that is part of the
NonStop NET/MASTER product. NCL is ideally suited to writing procedures for
automated system and network operation tasks, such as monitoring system status and
submitting commands to subsystems.
Network Statistics Extended (NSX). A network management tool that provides operators
with a global perspective on the entire network. With NSX, operators can collect and
monitor up-to-the-moment performance statistics on all nodes, processors, and
Expand line handlers in the network.
node. A system or device that follows the protocols of a specific network and that other
systems or devices in that network can address.
nonmaster machine. Any machine of a NonStop Tuxedo application that is not designated
to be the master machine. See also master machine.
nonrestart checkpoint. A checkpoint operation that does not send a restart address to the
backup process. If the primary process fails following a nonrestart checkpoint
operation, the backup takes over from the program address saved in the backup
process as a result of the last restart checkpoint operation.
nonretryable operation. An operation that cannot be safely tried again if the outcome of
the first attempt is uncertain. Contrast with retryable operation.
NSAA. NonStop Advanced Architecture used with Y-series hardware (or TNS/E systems).
NonStop Access for Networking. A collection of network components that extends fault-
tolerant computing through the LAN to the desktop.
NonStop C. The HP ANSI-compliant C language. Extensions to the language include
functions to support process pairs with an active backup.
NonStop NET/MASTER Management Services. NonStop NET/MASTER Management
Services is a network-management product that allows you to monitor and manage a
single NonStop system or an entire network composed of both HP and IBM systems. It
includes a variety of management services and is fully integrated with other Distributed
Systems Management (DSM) products.
NonStop processing. On HP NonStop systems, processing characterized by continued
operation even when a component fails, when equipment is being repaired or replaced,
or while new processors or peripheral devices are being added to the system. In the
Guardian environment, NonStop processing is provided by means of fault tolerance
and process pairs.
NonStop process pair. See process pair.