54 lines
3.3 KiB
HTML
54 lines
3.3 KiB
HTML
<?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.Type" content="concept" />
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<meta name="DC.Title" content="Check record format level identifiers" />
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<meta name="abstract" content="You can also improve copy performance by correctly setting the record format level identifiers in the CPYF command." />
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<meta name="description" content="You can also improve copy performance by correctly setting the record format level identifiers in the CPYF command." />
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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>Check record format level identifiers</title>
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</head>
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<body id="rbal3identifier"><a name="rbal3identifier"><!-- --></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">Check record format level identifiers</h1>
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<div><p>You can also improve copy performance by correctly
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setting the record format level identifiers in the CPYF command.</p>
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<p>If you are using <a href="../cl/cpyf.htm">CPYF</a> to
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move data between two supposedly <em>identical</em> files, the record format
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level identifiers should be identical to optimize copy performance. If the
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record format level identifiers are not identical, CPYF goes through a longer
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code path that checks each field and column in every record. This can impact
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the time CPYF requires to complete the function if extensive checking is not
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required.</p>
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<p>Record format level identifiers of the two files should be different if
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the files have different attributes. If they are not different, field and
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column-level checking does not perform, resulting in improper data conversions
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or none at all. Note that FMTOPT (*NOCHK) can be specified to avoid field
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and column-level checking, regardless of the value of the record format level
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identifiers, although certain attributes of the data (such as null values)
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will be lost when FMTOPT (*NOCHK) is specified.</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="rbal3performance.htm" title="There are some guidelines that you can follow to improve the performance of your copy operations.">Performance</a></div>
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</div>
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</div>
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</body>
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</html> |