87 lines
6.3 KiB
HTML
87 lines
6.3 KiB
HTML
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<meta name="DC.Title" content="Overview of DDM functions" />
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<meta name="abstract" content="This topic gives an overview of the types of DDM functions that can be done on a target server." />
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<meta name="DC.subject" content="functions overview, iSeries system, overview of DDM functions, command, CL, RNMOBJ (Rename Object), command, Rename Object (RNMOBJ), Rename Object (RNMOBJ), object, renaming, MOVOBJ (Move Object), Move Object (MOVOBJ), MOVOBJ (Move Object), Move Object (MOVOBJ), moving" />
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<title>Overview of DDM functions</title>
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<body id="rbae5ddmfunc"><a name="rbae5ddmfunc"><!-- --></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">Overview of DDM functions</h1>
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<div><p>This topic gives an overview of the types of DDM functions that
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can be done on a target server.</p>
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<p>The following <em>file</em> operations, normally specified in <strong>HLL programs</strong>,
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can be done on files at target servers:</p>
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<ul><li>Allocating, opening, or closing one or more files.</li>
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<li>Reading, writing, changing, or deleting records in a file.</li>
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</ul>
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<p>The following <em>file</em> and <em>nonfile</em> operations, normally specified
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in <strong>CL programs</strong> or by CL commands, can be done on files at the target
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servers:</p>
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<ul><li>Copying the contents of a file.</li>
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<li>Performing operations on physical or logical file members (such as adding,
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clearing, or removing members), but only if the target is an <span class="keyword">iSeries™ server</span> or <span class="keyword">System/38™</span>.</li>
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<li>Accessing remote <em>files</em> for nondata purposes, such as: <ul><li>Displaying information about one or more files, using commands such as <span class="cmdname">Display
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File Description (DSPFD)</span> and <span class="cmdname">Display File Field Description
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(DSPFFD)</span>. These commands can display the file attributes of the
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DDM file on the source system or the file or field attributes of the remote
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file on the target system.</li>
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<li>Controlling the locking of files on the target system, using the <span class="cmdname">Allocate
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Object (ALCOBJ)</span> and <span class="cmdname">Deallocate Object (DLCOBJ)</span> commands.</li>
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<li>Deleting, renaming, creating, and changing files using the <span class="cmdname">Delete
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File (DLTF)</span>, <span class="cmdname">Rename Object (RNMOBJ)</span>, <span class="cmdname">Create
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Physical File (CRTPF)</span>, <span class="cmdname">Create Source Physical File (CRTSRCPF)</span>, <span class="cmdname">Create
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Logical File (CRTLF)</span>, <span class="cmdname">Change Physical File (CHGPF)</span>, <span class="cmdname">Change
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Logical File (CHGLF)</span>, and <span class="cmdname">Change Source Physical File (CHGSRCPF)</span> commands.</li>
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</ul>
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</li>
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<li>Accessing remote <em>systems</em> for non-data purposes: <ul><li>Send a CL command to the target system (an <span class="keyword">iSeries server</span> and
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a <span class="keyword">System/38</span> only) so it can
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be run there, instead of on the source system (where it might not be useful
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to run it), using the <span class="cmdname">Submit Remote Command (SBMRMTCMD)</span> command.
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The <span class="cmdname">SBMRMTCMD</span> command is the method you use to move, save,
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or restore files on a target server. For example, a <span class="cmdname">Move Object (MOVOBJ)</span> command
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might be sent to move a database file on the target server. (For typical uses
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of the <span class="cmdname">SBMRMTCMD</span> command, refer to its description in Use
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CL and DDS with DDM or refer to the CL topic for a more complete description.)</li>
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</ul>
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</li>
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</ul>
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<p>Various other nonfile-related operations can also be done
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on the target server.</p>
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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="rbae5intrdf.htm" title="This topic describes the purpose of distributed data management (DDM), the functions that DDM supplies on the iSeries server, and the concepts of i5/OS DDM.">Introduction to i5/OS DDM</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="../rbam6/rbam6clmain.htm">Control language</a></div>
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<div><a href="rbae5cldsp.htm" title="This topic contains DDM-related information about specific iSeries control language (CL) commands, data description specifications (DDS) considerations, DDS keywords, and DDM user profile authority.">Use CL and DDS 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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