55 lines
3.3 KiB
HTML
55 lines
3.3 KiB
HTML
<?xml version="1.0" encoding="utf-8"?>
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
|
|
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="dc.language" scheme="rfc1766" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<meta name="dc.date" scheme="iso8601" content="2005-09-06" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow"/>
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
|
<title>Spooling overview</title>
|
|
<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
|
|
<link rel="stylesheet" type="text/css" href="ic.css" />
|
|
</head>
|
|
<body>
|
|
<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
|
|
<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
|
|
|
|
|
|
<a name="rzalusplover"></a>
|
|
<h4 id="rzalusplover">Spooling overview</h4>
|
|
<p>Spooling functions are performed by the system without requiring any special
|
|
operations by the program that creates the output. When a program opens a
|
|
printer file, the operating system determines if the output is to be spooled
|
|
by looking at the printer file SPOOL parameter.</p>
|
|
<p>When a printer file specifying spooling is opened, the spooled file containing
|
|
the output of the program (data to be printed) is placed on the appropriate
|
|
output queue in the system. A spooled file can be made available for printing
|
|
when the printer file is opened, when the printer file is closed, or at the
|
|
end of the job. This is done by specifying a particular value on the schedule
|
|
parameter. *IMMED makes the spooled file available to the writer as soon as
|
|
the program is opened. *FILEEND makes the spooled file available to the writer
|
|
as soon as the file is closed. *JOBEND makes the spooled file available to
|
|
the writer as soon as the job is complete.</p>
|
|
<p>This process of spooling prevents a potential job limitation imposed by
|
|
the availability or speed of the printer devices. That is, the system can
|
|
process application programs that generate printed output much faster than
|
|
printers can print the output.</p>
|
|
<p>By spooling (that is, sending the output to output queues to await printing),
|
|
the system does not have to wait until the printing for that application program
|
|
is complete before it can start processing the next application program.</p>
|
|
<p>Spooling is especially important in a multiple-user environment where the
|
|
number of jobs running often exceeds the number of available printer devices.
|
|
Using spooling, output can be easily redirected from one output queue to
|
|
another or from one printer to another.</p>
|
|
<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
|
|
</body>
|
|
</html>
|