71 lines
4.3 KiB
HTML
71 lines
4.3 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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<meta name="DC.Title" content="Prevent allocation errors when copying files" />
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<meta name="abstract" content="iSeries places locks on the from-file and the to-file when you copy files. To prevent allocation errors when copying files, you can place stronger locks on those files." />
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<meta name="description" content="iSeries places locks on the from-file and the to-file when you copy files. To prevent allocation errors when copying files, you can place stronger locks on those files." />
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<meta name="DC.Relation" scheme="URI" content="rbal3preerr.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbal3reasons.htm" />
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<title>Prevent allocation errors when copying files</title>
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</head>
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<body id="rbal3preall"><a name="rbal3preall"><!-- --></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">Prevent allocation errors when copying files</h1>
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<div><p><span class="keyword">iSeries™</span> places locks
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on the from-file and the to-file when you copy files. To prevent allocation
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errors when copying files, you can place stronger locks on those files.</p>
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<p>When a database file is copied, each from-file member is allocated with
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a shared-for-read (*SHRRD) lock state. When a device file is copied, the
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copy command allocates it with a shared-for-read (*SHRRD) lock state. The
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copy command allocates the member only while it copies it. A shared-for-read
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lock state lets other users read and update the file while you are copying
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it.</p>
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<p>Generally, the member being copied to is allocated with a shared-for-update
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(*SHRUPD) lock state. However, if you specify MBROPT(*REPLACE), the command
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allocates the member you are copying to with an exclusive (*EXCL) lock state,
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and the records in the to-file are removed</p>
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<div class="p">When you are copying one physical file to another, you can place stronger
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locks on the members to allow internal system functions to perform the copy. <ul><li>The command can allocate the from-file member with an exclusive-allow-read
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(*EXCLDRD) lock state.</li>
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<li>The command can allocate the to-file member with an exclusive (*EXCL)
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lock state.</li>
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</ul>
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</div>
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<p>The command requires these stronger locks depending on the type of copy
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you perform. If you cannot get these locks, run the copy command and specify
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a value of 1 (or any valid value other than 0) on the ERRLVL parameter. These
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values do not require the stronger locks.</p>
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<p>There are many reasons for allocation errors when you copy files.
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For instance, you should not use functions that touch the to-file during the
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copy.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rbal3reasons.htm">Reasons for allocation errors when copying files</a></strong><br />
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</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbal3preerr.htm" title="You can prevent many copy errors when you plan for certain conditions and situations ahead of time.">Prevent errors when copying files</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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