<?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="concept" /> <meta name="DC.Title" content="Additional DDM concepts" /> <meta name="abstract" content="Most users of DDM will not need the information in the remainder of these topics; it is intended primarily for experienced programmers who need to know more about DDM." /> <meta name="description" content="Most users of DDM will not need the information in the remainder of these topics; it is intended primarily for experienced programmers who need to know more about DDM." /> <meta name="DC.subject" content="concepts, advanced, program start request, open data path (ODP), ODP (open data path), DDM conversation" /> <meta name="keywords" content="concepts, advanced, program start request, open data path (ODP), ODP (open data path), DDM conversation" /> <meta name="DC.Relation" scheme="URI" content="rbae5intrdf.htm" /> <meta name="DC.Relation" scheme="URI" content="rbae5xs3xsrc.htm" /> <meta name="DC.Relation" scheme="URI" content="rbae5xs3xtgt.htm" /> <meta name="DC.Relation" scheme="URI" content="rbae5jobcnvs.htm" /> <meta name="DC.Relation" scheme="URI" content="rbae5ddmop.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="rbae5advcncp" /> <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>Additional DDM concepts</title> </head> <body id="rbae5advcncp"><a name="rbae5advcncp"><!-- --></a> <!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script> <h1 class="topictitle1">Additional DDM concepts</h1> <div><p>Most users of DDM will not need the information in the remainder of these topics; it is intended primarily for experienced programmers who need to know more about DDM.</p> <p>Described are conceptual details and examples about:</p> <ul><li>Program start requests, which start the TDDMs (target jobs)</li> <li>Open data paths (ODPs), used to access the files</li> <li>Remote location information</li> <li>DDM conversations, established for source and target communications</li> <li>Source and target jobs</li> <li>I/O operations within a job</li> </ul> </div> <div> <ul class="ullinks"> <li class="ulchildlink"><strong><a href="rbae5xs3xsrc.htm">iSeries server as the source server for DDM</a></strong><br /> When an application program or user in a source server job first refers to a DDM file, several actions occur as part of processing the request on the source server.</li> <li class="ulchildlink"><strong><a href="rbae5xs3xtgt.htm">iSeries server as the target server for DDM</a></strong><br /> The <span class="keyword">iSeries™</span> target DDM (or TDDM) is actually a job that runs a DDM-related target server program. It is started when the source server sends a program start request (an SDDM).</li> <li class="ulchildlink"><strong><a href="rbae5jobcnvs.htm">DDM-related jobs and DDM conversations</a></strong><br /> This topic provides additional information about activation groups, source server jobs, target server jobs, and the DDM conversations used by those jobs.</li> </ul> <div class="familylinks"> <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> </div> <div class="relconcepts"><strong>Related concepts</strong><br /> <div><a href="rbae5ddmop.htm" title="This topic provides task-oriented information and examples that describe various aspects of DDM operation considerations.">Operating considerations for DDM</a></div> </div> </div> </body> </html>