64 lines
4.6 KiB
HTML
64 lines
4.6 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="security" content="public" />
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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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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Example: Process multiple requests for remote files with DDM" />
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<meta name="abstract" content="This example shows how multiple programs access multiple files on the same target server." />
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<meta name="description" content="This example shows how multiple programs access multiple files on the same target server." />
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<meta name="DC.subject" content="accessing, processing multiple requests, source DDM (SDDM), remote files, SDDM (source DDM), DDM source considerations, target DDM (TDDM), DDM target considerations, file, sharing, SHARE parameter, sharing file, remote system, file sharing" />
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<meta name="keywords" content="accessing, processing multiple requests, source DDM (SDDM), remote files, SDDM (source DDM), DDM source considerations, target DDM (TDDM), DDM target considerations, file, sharing, SHARE parameter, sharing file, remote system, file sharing" />
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<meta name="DC.Relation" scheme="URI" content="rbae5exampleaccessmultiple.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rbae5exampleproc" />
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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>Example: Process multiple requests for remote files with DDM</title>
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</head>
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<body id="rbae5exampleproc"><a name="rbae5exampleproc"><!-- --></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">Example: Process multiple requests for remote files with DDM</h1>
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<div><p>This example shows how multiple programs access multiple files
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on the same target server. </p>
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<div class="section"><p>This example shows a <span class="keyword">System/36™</span> target
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server. The SDDM is shown handling requests for two files from two programs
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in different jobs, and two TDDMs are handling the requests on the target server
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(one TDDM for each requesting program). Notice that, although program B is
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accessing two files on the target server, only one TDDM is created if all
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the associated DDM files specify the same remote location information to identify
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the target server.</p>
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</div>
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<div class="section"><p>Notice that both programs A and B are sharing FILEA. However,
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because these programs are shown to be in separate jobs, they <em>cannot</em> share
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the same open data path (ODP) to FILEA. If they were in the same job, programs
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A and B can share both the ODP on the source server <em>and</em> the remote
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file. When multiple programs within the same job are accessing a remote file
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at the same time (by using one TDDM for each program), the rules for file
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sharing are the same for remote files as for local files. These rules are
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based on how the SHARE parameter is specified on the <span class="cmdname">Create DDM File
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(CRTDDMF)</span>, the <span class="cmdname">Override with Database File (OVRDBF)</span>,
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and the <span class="cmdname">Change DDM File (CHGDDMF)</span> commands.</p>
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</div>
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<div class="example"> <div class="fignone" id="rbae5exampleproc__dtmgrs4"><a name="rbae5exampleproc__dtmgrs4"><!-- --></a><span class="figcap">Figure 1. Example: Process
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multiple program and file requests</span><br /><img src="rsll108.gif" alt="This figure is described in the preceding text." /><br /></div>
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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="rbae5exampleaccessmultiple.htm" title="These examples show a single application program using DDM to access multiple remote files.">Examples: Access multiple remote files with DDM</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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