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<h2 class="title"><a id="xa"></a>Chapter 13. Distributed Transactions </h2>
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<p>
<b>Table of Contents</b>
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<dl>
<dt>
<span class="sect1">
<a href="xa.html#xa_intro">Introduction</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="ch13s02.html">Berkeley DB XA Implementation</a>
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<span class="sect1">
<a href="xa_build.html">Building a Global Transaction Manager</a>
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<dl>
<dt>
<span class="sect2">
<a href="xa_build.html#idp2310216">Communicating with multiple Berkeley DB environments</a>
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<dt>
<span class="sect2">
<a href="xa_build.html#idp2311288">Managing the Global Transaction ID (GID) name space</a>
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<span class="sect2">
<a href="xa_build.html#idp2293376">Maintaining state for each distributed transaction.</a>
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<a href="xa_build.html#idp2226880">Recovering from the failure of a single environment</a>
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<a href="xa_build.html#idp2287824">Recovering from GTM failure</a>
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<span class="sect1">
<a href="xa_xa_intro.html">XA Introduction</a>
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<span class="sect1">
<a href="xa_xa_config.html">Configuring Berkeley DB with the Tuxedo System</a>
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<span class="sect2">
<a href="xa_xa_config.html#idp2312920">Update the Resource Manager File in Tuxedo</a>
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<a href="xa_xa_config.html#idp2341840">Build the Transaction Manager Server</a>
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<span class="sect2">
<a href="xa_xa_config.html#idp1702176">Update the UBBCONFIG File</a>
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<span class="sect1">
<a href="xa_xa_restrict.html">Restrictions on XA Transactions</a>
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<a href="xa_faq.html">XA: Frequently Asked Questions</a>
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<h2 class="title" style="clear: both"><a id="xa_intro"></a>Introduction</h2>
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<p>
An application must use distributed transactions whenever
it wants transactional semantics either across operations in
multiple Berkeley DB environments (even if they are on the
same machine) or across operations in Berkeley DB and some
other database systems (for example, Oracle server). Berkeley DB
provides support for distributed transactions using a
two-phase commit protocol. In order to use the two-phase
commit feature of Berkeley DB, an application must either
implement its own global transaction manager or use an
XA-compliant transaction manager such as Oracle Tuxedo
(as Berkeley DB can act as an XA-compliant resource manager).
</p>
<p>
This chapter explains Berkeley DB's XA-compliant resource manager,
which can be used in any X/Open distributed transaction
processing system, and explains how to configure Oracle Tuxedo
to use the Berkeley DB resource manager.
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