NET/MASTER Network Control Language (NCL) Programmer's Guide

16 Environments and Command
Processing
106160 Tandem Computers Incorporated 16–1
This section discusses the relationships between NonStop NET/MASTER
Management Services (MS) users, NonStop NET/MASTER MS environments,
NonStop NET/MASTER MS commands, and NCL processes.
The section begins by discussing the types of users that can use NonStop
NET/MASTER MS and the types of environments in which users and NCL processes
operate.
The concept of environments is closely related to how NonStop NET/MASTER MS
commands are executed from an NCL process. Accordingly, the section also discusses
the two ways to enter NonStop NET/MASTER MS commands from an NCL process:
by using the CMD core statement and by using the INTCMD verb. In particular, it
discusses where CMD and INTCMD send the results of NonStop NET/MASTER MS
commands.
Then the section discusses the two queues associated with a dependent processing
environment: the request queue and the response queue. Finally, the section
discusses how to send a message to an NCL process by using the INTQ command, and
how to send a message between NCL processes by using the WRITE verb.
Table 16-1 summarizes the core statement, verb, and NonStop NET/MASTER MS
commands used to initiate processing in an environment.
Table 16-1. Core Statement, Verb, and NonStop NET/MASTER MS Commands Used to Initiate
Processing in an Environment
Core Statement, Verb,
or Command Description
CMD core statement Issues a NonStop NET/MASTER MS command for execution in the current
execution environment.
EXEC command Invokes an NCL procedure for serial execution.
INTCMD verb Executes a NonStop NET/MASTER MS command in the dependent
processing environment of an NCL process.
START command Invokes an NCL procedure for asynchronous execution.
START verb Invokes an NCL procedure for asynchronous execution in the specified
environment using the specified variables.