67 lines
3.7 KiB
HTML
67 lines
3.7 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="How a subsystem handles several job queues" />
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<meta name="abstract" content="To illustrate how a subsystem handles several job queues, consider this scenario." />
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<meta name="description" content="To illustrate how a subsystem handles several job queues, consider this scenario." />
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<meta name="DC.Relation" scheme="URI" content="rzaksassignqueueentry.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004-2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004-2006" />
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<meta name="DC.Format" content="XHTML" />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>How a subsystem handles several job queues</title>
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</head>
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<body id="rzakshowsbshndleque"><a name="rzakshowsbshndleque"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">How a subsystem handles several job queues</h1>
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<div><p>To illustrate how a subsystem handles several job queues, consider
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this scenario.</p>
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<ul class="simple"><li><strong>Job Queue A (SEQNBR=10)</strong></li>
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<li>Job 1</li>
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<li>Job 2</li>
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<li>Job 3</li>
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<li><strong>Job Queue B (SEQNBR=20)</strong></li>
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<li>Job 4</li>
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<li>Job 5</li>
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<li>Job 6</li>
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<li><strong>Job Queue C (SEQNBR=30)</strong></li>
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<li>Job 7</li>
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<li>Job 8</li>
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<li>Job 9</li>
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</ul>
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<p>Each job queue entry in this scenario is specified as MAXACT(*NOMAX). The
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subsystem first selects jobs from job queue <strong>A</strong> because the job queue
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entry has the lowest sequence number. If the maximum number of jobs in the
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subsystem is 3 (MAXJOBS(3) parameter on the Create Subsystem Description (<span class="cmdname">CRTSBSD</span>)
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command), it can select all the jobs from job queue <strong>A</strong> to be active
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at the same time. </p>
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<p>When any of the three jobs is completed, the activity level is no longer
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at the maximum; therefore a new job is selected from job queue <strong>B</strong> because
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it has the next lowest sequence number (assuming no new jobs have been added
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to job queue <strong>A</strong>). Because each job queue entry specifies MAXACT(*NOMAX),
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the MAXACT value does not prevent jobs from being started. Had
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each job queue entry specified MAXACT(1), then jobs 1, 4, and 7 would have
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been started. Had job queue entry <strong>A</strong> been specified as MAXACT(2), then
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jobs 1, 2, and 4 would have been started.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaksassignqueueentry.htm" title="To assign a job queue entry to a subsystem description, use the character-based interface.">Assign the job queue to the subsystem</a></div>
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</div>
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</div>
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</body>
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</html>
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