72 lines
5.1 KiB
HTML
72 lines
5.1 KiB
HTML
<?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="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="reference" />
|
|
<meta name="DC.Title" content="Variable-length records" />
|
|
<meta name="abstract" content="If your iSeries source server is running OS/400 Version 2 Release 1 Modification 1, DDM supports variable-length record files as defined in the DDM architecture." />
|
|
<meta name="description" content="If your iSeries source server is running OS/400 Version 2 Release 1 Modification 1, DDM supports variable-length record files as defined in the DDM architecture." />
|
|
<meta name="DC.subject" content="variable-length records, record processing, system, iSeries, variable-length records" />
|
|
<meta name="keywords" content="variable-length records, record processing, system, iSeries, variable-length records" />
|
|
<meta name="DC.Relation" scheme="URI" content="rbae5amc.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rbae5ddmcom.htm" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1999, 2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1999, 2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="rbae5varlength" />
|
|
<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>Variable-length records</title>
|
|
</head>
|
|
<body id="rbae5varlength"><a name="rbae5varlength"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Variable-length records</h1>
|
|
<div><p>If your <span class="keyword">iSeries™</span> source
|
|
server is running OS/400<sup>®</sup> Version 2 Release 1 Modification 1, DDM supports
|
|
variable-length record files as defined in the DDM architecture.</p>
|
|
<div class="section"><p>You can use DDM on your <span class="keyword">iSeries server</span> to
|
|
open variable-length record files on target systems that are not <span class="keyword">iSeries</span> or S/38 servers. (Initially
|
|
you can open variable-length record files if you are not opening the file
|
|
for updating.) For subsequent read operations, variable-length records are
|
|
padded with blanks to the maximum record length of the file. Trailing blanks
|
|
are removed on write operations.</p>
|
|
</div>
|
|
<div class="section"><p>If your <span class="keyword">iSeries</span> source
|
|
server is running OS/400 Version 2 Release 2 in addition to the Version
|
|
2 Release 1 Modification 1 support mentioned earlier, <span class="keyword">iSeries</span> variable-length
|
|
record access is supported using DDM. Variable-length records can be used
|
|
when opening a variable-length record file on target servers that are not <span class="keyword">iSeries</span> or <span class="keyword">System/38™</span> servers.
|
|
For subsequent read operations against files opened with variable-length records,
|
|
variable-length records are padded with blanks to the maximum record length
|
|
of the file. Also, the actual record length (maximum record length of file
|
|
minus the number of padded blanks) is appended to the end of each record.
|
|
For write operations, the actual record length is used to determine the length
|
|
of the variable-length record to send to the target server. No counting of
|
|
trailing blanks is necessary to determine the actual length of record data.</p>
|
|
</div>
|
|
<div class="section"><p>The target DDM <span class="keyword">iSeries server</span>s
|
|
running at Version 2 Release 2 also support variable-length record files.
|
|
A variable-length record file can be created on the <span class="keyword">iSeries</span> target
|
|
server as a result of a create file request.</p>
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rbae5amc.htm" title="Access methods control what subsets of functions can be performed after a particular remote file is opened. This might mean that an iSeries program, or a group of programs sharing a non-iSeries file, cannot do all the same operations that are possible using a file that is on the local iSeries server.">Work with access methods for DDM</a></div>
|
|
</div>
|
|
<div class="relref"><strong>Related reference</strong><br />
|
|
<div><a href="rbae5ddmcom.htm" title="This topic classifies DDM commands and parameters.">DDM commands and parameters</a></div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |