123 lines
6.2 KiB
HTML
123 lines
6.2 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" 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.language" scheme="rfc1766" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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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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<meta name="dc.date" scheme="iso8601" content="2005-09-06" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="Robots" content="index,follow"/>
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<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))' />
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<title>How the network print server is accessed</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="rzaluconnpsaccess"></a>
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<h4 id="rzaluconnpsaccess">How the network print server is accessed</h4>
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<p>Before a client can communicate with the network print server, a communications
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session must be established. A communications session is a logical connection
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between two systems through which a client program on a local system can communicate
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with a server program on a remote system.</p>
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<p>After a communications session has been established, the client can start
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the network print server by sending a special record, called a program start
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request (PSR), to the iSeries server. The communications session you use can
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utilize different protocols. Refer to the appropriate documentation for that
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communications type for information on using program start requests (PSRs).</p>
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<p>After the network print server program has been started using a PSR, a
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communications transaction has been started. A communications transaction
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is a logical connection between two programs on a communications session.
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After this communications transaction starts, data can be exchanged between
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the client and the network print server.</p>
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<p><span class="bold">Prestart jobs and the network print server</span></p>
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<p>Prestart jobs provide increased performance between a program start request
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(PSR) initiated by a client and the network print server. Prestart jobs are
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defined within a subsystem. Prestart jobs become active when that subsystem
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is started or they can be controlled with the Start Prestart Job (STRPJ) and
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End Prestart Job (ENDPJ) commands.</p>
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<p>The program name contained in the PSR from the client must be defined in
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the prestart job entry. This is how the PSR attaches itself to a prestart
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job and therefore achieves better performance.</p>
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<p>The network print server has prestart jobs defined in the QBASE and QCMN
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subsystems. The number of prestart jobs that automatically start to support
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the network print server is small and thus saves system resources.</p>
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<p><span class="bold">Monitoring prestart jobs for the network print server</span></p>
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<p>Monitoring prestart jobs for the network print server in the QBASE or QCMN
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subsystem can be done using the Display Active Prestart Jobs (DSPACTPJ) command.
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For the network print server, you need to know the subsystem your prestart
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jobs are in (QBASE or QCMN) and the program for which the prestart jobs are
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started (QNPSERVR).</p>
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<p>This command provides the following information: </p>
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<ul>
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<li>Prestart jobs:
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<ul>
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<li>Current number</li>
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<li>Average number</li>
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<li>Peak number</li></ul></li>
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<li>Prestart jobs in use:
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<ul>
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<li>Current number</li>
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<li>Average number</li>
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<li>Peak number</li></ul></li>
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<li>Program start requests:
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<ul>
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<li>Current number waiting</li>
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<li>Average number waiting</li>
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<li>Peak number waiting</li>
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<li>Average wait time</li>
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<li>Number accepted</li>
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<li>Number rejected
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<a name="wq66"></a>
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<div class="notetitle" id="wq66">Note:</div>
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<div class="notebody">The network print server never rejects
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a PSR. All PSRs are handled, or they are queued and use the next available
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prestart job.</div></li></ul></li></ul>
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<p><span class="bold">Changing prestart job entries</span></p>
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<p>The information presented for an active prestart job can be refreshed by
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pressing the F13 key while on the DSPACTPJ display. Of particular interest
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is the information about PSRs. This information can indicate to you whether
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or not you need to change the available number of prestart jobs. If you have
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information indicating PSRs are waiting for an available prestart job, you
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can change prestart jobs using the Change Prestart Job Entry (CHGPJE) command.</p>
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<p>Following is an example of a prestart job entry in the QBASE subsystem
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for the network print server. </p>
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<pre class="xmp">SBSD(QSYS/QBASE) +
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PGM(QSYS/QNPSERVR) +
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USER(QUSER) +
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STRJOBS(*YES) +
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INLJOBS(1) +
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THRESHOLD(1) +
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ADLJOBS(3) +
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MAXJOBS(*NOMAX) +
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JOB(*PGM) +
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JOBD(*USRPRF) +
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MAXUSE(200) +
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WAIT(*YES) +
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POOLID(1) +
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CLS(QGPL/QCASERVR *CALC *NONE *CALC)</pre>
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<p>If the PSRs were not being acted on fast enough, you could: </p>
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<ul>
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<li>Increase the Initial number of jobs (INLJOBS) parameter value.</li>
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<li>Increase the Additional number of jobs (ADLJOBS) parameter value.</li></ul>
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<p>When the Threshold (THRESHOLD) parameter value is reached, the additional
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number of jobs are prestarted.</p>
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<p>The key is to match the number of prestart jobs to the number of PSRs that
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are being sent. Keeping this association as close to one-to-one ratio ensures
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peak system performance.</p>
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<p>Additional prestart jobs can be started if the number of program start
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requests to the network print server exceeds the number of available prestart
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jobs.</p>
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<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
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</body>
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</html>
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