58 lines
3.8 KiB
HTML
58 lines
3.8 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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<meta name="DC.Title" content="Distributed unit of work connection considerations" />
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<meta name="abstract" content="When connecting in a distributed unit of work application, there are many considerations." />
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<meta name="description" content="When connecting in a distributed unit of work application, there are many considerations." />
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<meta name="DC.subject" content="connection management, distributed unit of work considerations, distributed unit of work, connection considerations" />
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<title>Distributed unit of work connection considerations</title>
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</head>
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<body id="rbafydrdaconnect3"><a name="rbafydrdaconnect3"><!-- --></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">Distributed unit of work connection considerations</h1>
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<div><p>When connecting in a distributed unit of work application, there
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are many considerations.</p>
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<div class="section"><ul><li>If the unit of work will perform updates at more than one application
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server and commitment control will be used, all connections over which updates
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will be done should be made using commitment control. If the connections are
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done not using commitment control and later committable updates are performed,
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read-only connections for the unit of work are likely to result.</li>
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<li>Other non-SQL commit resources, such as local files, DDM files, and commitment
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control API resources, will affect the updatable and read-only status of a
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connection.</li>
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<li>If connecting using commitment control to an application server that does
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not support distributed unit of work (for example, a V4R5 <span class="keyword">iSeries™</span> using
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TCP/IP), that connection will be either updatable or read-only. If the connection
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is updatable it is the only updatable connection. As of V5R3, updates done
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as a result of triggers or user defined functions activated during a database
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query will be taken into consideration during DRDA<sup>®</sup> two-phase-commit operations.</li>
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</ul>
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</div>
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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="rbafydistribsupport.htm" title="DB2 UDB for iSeries supports two levels of distributed relational database.">Distributed support</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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