<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html lang="en-us" xml:lang="en-us"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="copyright" content="(C) Copyright IBM Corporation 2005" /> <meta name="DC.rights.owner" content="(C) Copyright IBM Corporation 2005" /> <meta name="security" content="public" /> <meta name="Robots" content="index,follow" /> <meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' /> <meta name="DC.Type" content="concept" /> <meta name="DC.Title" content="Check record format level identifiers" /> <meta name="abstract" content="You can also improve copy performance by correctly setting the record format level identifiers in the CPYF command." /> <meta name="description" content="You can also improve copy performance by correctly setting the record format level identifiers in the CPYF command." /> <meta name="DC.Relation" scheme="URI" content="rbal3performance.htm" /> <meta name="DC.Format" content="XHTML" /> <meta name="DC.Identifier" content="rbal3identifier" /> <meta name="DC.Language" content="en-us" /> <!-- All rights reserved. Licensed Materials Property of IBM --> <!-- US Government Users Restricted Rights --> <!-- Use, duplication or disclosure restricted by --> <!-- GSA ADP Schedule Contract with IBM Corp. --> <link rel="stylesheet" type="text/css" href="./ibmdita.css" /> <link rel="stylesheet" type="text/css" href="./ic.css" /> <title>Check record format level identifiers</title> </head> <body id="rbal3identifier"><a name="rbal3identifier"><!-- --></a> <!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script> <h1 class="topictitle1">Check record format level identifiers</h1> <div><p>You can also improve copy performance by correctly setting the record format level identifiers in the CPYF command.</p> <p>If you are using <a href="../cl/cpyf.htm">CPYF</a> to move data between two supposedly <em>identical</em> files, the record format level identifiers should be identical to optimize copy performance. If the record format level identifiers are not identical, CPYF goes through a longer code path that checks each field and column in every record. This can impact the time CPYF requires to complete the function if extensive checking is not required.</p> <p>Record format level identifiers of the two files should be different if the files have different attributes. If they are not different, field and column-level checking does not perform, resulting in improper data conversions or none at all. Note that FMTOPT (*NOCHK) can be specified to avoid field and column-level checking, regardless of the value of the record format level identifiers, although certain attributes of the data (such as null values) will be lost when FMTOPT (*NOCHK) is specified.</p> </div> <div> <div class="familylinks"> <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> </div> </div> </body> </html>