83 lines
6.7 KiB
HTML
83 lines
6.7 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 name="DC.Type" content="concept" />
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<meta name="DC.Title" content="How jobs are taken from a job queue" />
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<meta name="abstract" content="Different factors determine how the jobs are selected from a job queue and started." />
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<meta name="description" content="Different factors determine how the jobs are selected from a job queue and started." />
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<meta name="DC.Relation" scheme="URI" content="rzaksaboutjobqueue.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaksorderedlist.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzakshowjobqueuewrk.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaksjobqentryabout.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaksjobqhowallocated.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaksjobqdoineed2.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzakshowjobsaretakenfrommultiplejobqueues.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaksjobqsecurity.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.Identifier" content="rzaksjobqhowtaken" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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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 jobs are taken from a job queue</title>
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</head>
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<body id="rzaksjobqhowtaken"><a name="rzaksjobqhowtaken"><!-- --></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 jobs are taken from a job queue</h1>
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<div><p>Different factors determine how the jobs are selected from a job
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queue and started.</p>
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<div class="p"><dl><dt class="dlterm">Maximum active jobs for subsystems</dt>
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<dd>This represents the maximum number of jobs that can be running in a subsystem.
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After this limit is reached, no more jobs can start in the subsystem.</dd>
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</dl>
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<dl><dt class="dlterm">Maximum active jobs for job queues</dt>
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<dd>This represents the maximum number of jobs from the job queue that can
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be running in a subsystem at the same time. After this limit is reached, no
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more jobs can start from that job queue. </dd>
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</dl>
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<dl><dt class="dlterm">Priority on job queue</dt>
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<dd>Jobs that are waiting to run are selected based on the job queue priority.
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The subsystem attempts to run higher priority jobs first (job queue priority
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ranges from 0 through 9 where 0 is the higher priority), but if the number
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of jobs running from a priority level reaches the Maximum Active Jobs value
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per priority level, the next priority level is processed. (If jobs with the
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same priority enter the job queue, the first job submitted will run first,
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then the second, and so on.)</dd>
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</dl>
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<dl><dt class="dlterm">Sequence</dt>
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<dd>You specify the sequence in the job queue entry of the subsystem description.
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The sequence number defines the order in which the subsystem will process
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the job queues. The subsystem takes jobs from the job queue with the lowest
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sequence number first. If there are no more jobs on the job queue, or if one
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of the maximum values associated with the job queue is reached, the subsystem
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will process the job queue with the next highest sequence number.</dd>
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</dl>
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</div>
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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="rzaksaboutjobqueue.htm" title="A job queue contains an ordered list of jobs waiting to be processed by a subsystem. The job queue is the first place that a submitted batch job goes before becoming active in a subsystem. The job is held here until a number of factors are met.">Job queues</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzaksorderedlist.htm" title="The ordered list refers to the order in which jobs appear on the job queue. The availability, priority, and the date and time values help determine the order of jobs on the job queue.">Ordered list</a></div>
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<div><a href="rzakshowjobqueuewrk.htm" title="Job queues are allocated by a subsystem via the job queue entry. Jobs can be placed on a job queue even if the subsystem has not been started. When the subsystem is started, it processes the jobs on the queue.">How a job queue works</a></div>
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<div><a href="rzaksjobqentryabout.htm" title="A job queue entry identifies a job queue from which jobs are selected for running in the subsystem. There are five parameters in the job queue entry that control how the job queue should be handled.">Job queue entry</a></div>
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<div><a href="rzaksjobqhowallocated.htm" title="A job queue can be associated with several subsystems but it can only be allocated to one subsystem at a time. When the subsystem is started, the subsystem monitor tries to allocate each job queue defined in the subsystem job queue entries.">How job queues are allocated to a subsystem</a></div>
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<div><a href="rzaksjobqdoineed2.htm" title="In many cases, using QBATCH as the only job queue with the default of one active job will be adequate for your needs. If this is not adequate, you might want to have multiple job queues so that some job queues are active during normal working hours, some are for special purposes, and some are active after normal working hours.">Multiple job queues</a></div>
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<div><a href="rzakshowjobsaretakenfrommultiplejobqueues.htm" title="A subsystem processes jobs from a job queue based on sequence number. A subsystem can have more than one job queue entry and can therefore allocate more than one job queue.">How jobs are taken from multiple job queues</a></div>
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<div><a href="rzaksjobqsecurity.htm" title="You can maintain a level of security with your job queue by authorizing only certain persons (user profiles) to that job queue. In general, there are three ways that a user can become authorized to control a job queue (for example, hold or release the job queue).">Job queue security</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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