64 lines
4.1 KiB
HTML
64 lines
4.1 KiB
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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<meta name="DC.Title" content="iSeries target considerations for DDM" />
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<meta name="abstract" content="This topic covers target considerations for DDM." />
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<title>iSeries target considerations
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for DDM</title>
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</head>
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<body id="rbae5targetconsiderations"><a name="rbae5targetconsiderations"><!-- --></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="keyword">iSeries</span> target considerations
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for DDM</h1>
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<div><p>This topic covers target considerations for DDM.</p>
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<div class="section"><p>As with any database file, DDS might or might not be used to externally
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describe the attributes of the remote file when it is created on the remote <span class="keyword">iSeries™ server</span>. If DDS is used, then the source
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server program uses those attributes when it accesses the remote file (by
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using the DDM file). If DDS is not used, then the file's attributes must be
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described in the program.</p>
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</div>
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<div class="section"><p>When a source server program that accesses a file on a target <span class="keyword">iSeries server</span> is compiled (or recompiled),
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the existing DDM file is used to establish communications with the target
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server, and the remote file is actually accessed during compilation to extract
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its file and record attributes. Whether DDS is used to describe the file or
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not, level check identifiers are created during compilation and are included
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in the compiled program. These values are then used when the program is run
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and LVLCHK(*RMTFILE) is in effect for the DDM file.</p>
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</div>
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<div class="section"><p>Whether DDS is used to describe a remote <span class="keyword">iSeries</span> file or not, a source server
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program can have its own field and record format definitions provided in the
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program, or the program can substitute the definitions of another source server
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file that is created using DDS. Either can be done if LVLCHK(*NO) is in effect
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in the DDM file or specified in an <span class="cmdname">Override with Database File (OVRDBF)</span> command
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used at program run time. LVLCHK(*NO) need only be used when
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the record format used on the source server is different than that of the
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remote <span class="keyword">iSeries</span> file.</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="rbae5ddsinfo.htm" title="Data description specifications (DDS), which is used to externally describe the fields and record formats, can also be used with DDM to describe the file and record formats of a remote file.">Data description specifications considerations for DDM</a></div>
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