123 lines
7.9 KiB
HTML
123 lines
7.9 KiB
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<meta name="DC.Title" content="CRTDDMF (Create DDM File) considerations" />
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<meta name="abstract" content="For applications running on an iSeries server to access remote files, the programmer must use the CRTDDMF command to create an object called a DDM file." />
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<meta name="description" content="For applications running on an iSeries server to access remote files, the programmer must use the CRTDDMF command to create an object called a DDM file." />
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<meta name="DC.subject" content="command, Create DDM File (CRTDDMF), CRTDDMF (Create Distributed Data Management File), Create Distributed Data Management File (CRTDDMF), command, CL, CRTDDMF (Create Distributed Data Management File), Create Distributed Data Management File (CRTDDMF), distributed data management file, creating, ACCMTH parameter, Create DDM File (CRTDDMF)" />
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<title>CRTDDMF (Create DDM File) considerations</title>
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<body id="rbae5crtddmfcon"><a name="rbae5crtddmfcon"><!-- --></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"><span class="cmdname">CRTDDMF (Create DDM File)</span> considerations</h1>
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<div><p>For applications running on an <span class="keyword">iSeries™</span> server
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to access remote files, the programmer must use the <span class="cmdname">CRTDDMF</span> command
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to create an object called a DDM file.</p>
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<div class="section"><p>The ACCMTH parameter of this command shows which DDM access method
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should be used when opening the remote file. If *RMTFILE is used, <span class="keyword">i5/OS™</span> DDM selects an access method
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that is compatible with: </p>
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<ul><li>The type of VSAM data set being accessed</li>
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<li>The access methods supported by CICS/DDM for the VSAM data set</li>
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</ul>
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</div>
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<div class="section"><p>The table below shows how the possible values for the ACCMTH parameter
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correspond to VSAM data sets. </p>
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</div>
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<div class="tablenoborder"><a name="rbae5crtddmfcon__rbae5figacc"><!-- --></a><table cellpadding="4" cellspacing="0" summary="" id="rbae5crtddmfcon__rbae5figacc" width="100%" frame="border" border="1" rules="all"><caption>Table 1. ACCMTH parameter
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of <span class="keyword">iSeries</span> <span class="cmdname">CRTDDMF</span> command</caption><thead align="left"><tr><th rowspan="2" align="left" valign="bottom" width="20%" id="d0e89">ACCMTH parameter values</th>
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<th colspan="4" align="center" valign="bottom" id="d0e91">VSAM data
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set organization</th>
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</tr>
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<tr><th align="left" valign="bottom" width="20%" id="d0e94">ESDS</th>
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<th align="left" valign="bottom" width="20%" id="d0e96">RRDS</th>
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<th align="left" valign="bottom" width="20%" id="d0e98">KSDS</th>
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<th align="left" valign="bottom" width="20%" id="d0e100">VSAM Path</th>
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</tr>
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</thead>
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<tbody><tr><td align="left" valign="top" width="20%" headers="d0e89 ">*ARRIVAL</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e94 ">R</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e96 ">R</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e98 ">E</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e100 ">E</td>
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</tr>
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<tr><td align="left" valign="top" width="20%" headers="d0e89 ">*KEYED</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e94 ">E</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e96 ">E</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e98 ">R</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e100 ">R</td>
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</tr>
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<tr><td align="left" valign="top" width="20%" headers="d0e89 ">*BOTH</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e94 ">E</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e96 ">O</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e98 ">O</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e100 ">O</td>
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</tr>
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<tr><td align="left" valign="top" width="20%" headers="d0e89 ">*RANDOM</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e94 ">E</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e96 ">O</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e98 ">O</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e100 ">O</td>
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</tr>
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<tr><td align="left" valign="top" width="20%" headers="d0e89 ">*SEQUENTIAL</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e94 ">R</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e96 ">O</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e98 ">O</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e100 ">O</td>
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</tr>
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<tr><td align="left" valign="top" width="20%" headers="d0e89 ">*COMBINED</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e94 ">E</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e96 ">O</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e98 ">E</td>
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<td align="left" valign="top" width="20%" headers="d0e91 d0e100 ">E</td>
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</tr>
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<tr><td colspan="5" align="left" valign="top" headers="d0e89 d0e91 d0e94 d0e96 d0e98 d0e100 "><div class="p">Where: <dl><dt class="dlterm">R</dt>
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<dd>Shows the parameter is required for accessing the VSAM data set.</dd>
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<dt class="dlterm">O</dt>
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<dd>Shows the parameter is optional for accessing the VSAM data set.</dd>
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<dt class="dlterm">E</dt>
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<dd>Shows the parameter causes an <span class="keyword">i5/OS</span> message.</dd>
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</dl>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="section"><p>To improve performance, the <span class="keyword">iSeries</span> user
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might want to supply values other than *RMTFILE for the ACCMTH
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parameter. To avoid server messages, use the values specified in <a href="#rbae5crtddmfcon__rbae5figacc">Table 1</a> when
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accessing remote VSAM data sets.</p>
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</div>
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<div class="section"><p>The value specified for the RMTFILE file parameter must be the
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same as the value specified for the DATASET parameter of the CICS<sup>®</sup> DFHFCT macro
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when the VSAM data set is defined to the CICS system.</p>
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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="rbae5lulp.htm" title="The iSeries languages, utilities, and licensed programs in this topic can access remote CICS files.">iSeries languages, utilities, and licensed programs</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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