Spooler Programmer's Guide

Introduction to the Spooler Subsystem

Spooler Programmer’s Guide—522287-002

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Spooler and Spooler Plus Comparison

Spooler Plus is an optional product containing Spoolcom and Peruse modules that can

be used to replace the Spoolcom and Peruse modules provided by the D41 or later

product versions of the Spooler subsystem. You can use the Spooler Plus Spoolcom

and Peruse utilities to configure and manage expanded configurations of the Spooler

subsystem. You must use these utilities if the maximum jobs has been configured

above 8191.

The Spooler Plus subsystem is described in the Spooler Plus Utilities Reference

Manual.

Spooler Features

Features of the Spooler subsystem include:



Continuous operation. The Spooler subsystem keeps working even if a processor

fails.



Fault-tolerant applications. You can run application processes on the HP NonStop

system to avoid loss or duplication of data in the event of a failure.



Custom print processes. You can write your own print processes or use the print

processes supplied by HP.



Flexible routing structure. The Spooler subsystem allows the destination of

program output to be changed after the program has been run.



Interactive user control. The Spoolcom utility permits you to inspect or alter the

status of jobs and devices, specify the routing structure, and initialize the Spooler

subsystem.



Support for batch processing. You can specify attributes for jobs before they are

created using the CLASS SPOOL DEFINE procedure call.

Note. Because spooler is an industry-standard term used to describe a printer spooling

system, it used throughout the remainder of this guide to refer to the Spooler subsystem.