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<h2 class="title"><a id="transapp"></a>Chapter 11. Berkeley DB Transactional Data Store Applications </h2>
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<p>
<b>Table of Contents</b>
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<dl>
<dt>
<span class="sect1">
<a href="transapp.html#transapp_intro">Transactional Data Store introduction</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_why.html">Why transactions?</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_term.html">Terminology</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_fail.html">Handling failure in Transactional Data Store applications</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_app.html">Architecting Transactional Data
Store applications</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="quick_start_transapp_app.html">Getting Started with Transactional Data
Store Applications</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_env_open.html">Opening the environment</a>
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</dt>
<dt>
<span class="sect1">
<a href="transapp_data_open.html">Opening the databases</a>
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</dt>
<dt>
<span class="sect1">
<a href="transapp_put.html">Recoverability and deadlock handling</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_atomicity.html">Atomicity</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_inc.html">Isolation</a>
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</dt>
<dt>
<span class="sect1">
<a href="transapp_read.html">Degrees of isolation</a>
</span>
</dt>
<dd>
<dl>
<dt>
<span class="sect2">
<a href="transapp_read.html#snapshot_isolation">Snapshot Isolation</a>
</span>
</dt>
</dl>
</dd>
<dt>
<span class="sect1">
<a href="transapp_cursor.html">Transactional cursors</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_nested.html">Nested transactions</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_admin.html">Environment
infrastructure</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_deadlock.html">Deadlock detection</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_checkpoint.html">Checkpoints</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_archival.html">Database and log file
archival</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_logfile.html">Log file removal</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_recovery.html">Recovery procedures</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_hotfail.html">Hot failover</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_journal.html">Using Recovery on Journaling Filesystems</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_filesys.html">Recovery and filesystem operations</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_reclimit.html">Berkeley DB recoverability</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_tune.html">Transaction tuning</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_throughput.html">Transaction
throughput</a>
</span>
</dt>
<dt>
<span class="sect1">
<a href="transapp_faq.html">Transaction FAQ</a>
</span>
</dt>
</dl>
</div>
<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h2 class="title" style="clear: both"><a id="transapp_intro"></a>Transactional Data Store introduction</h2>
</div>
</div>
</div>
<p>
It is difficult to write a useful transactional tutorial and
still keep within reasonable bounds of documentation; that is,
without writing a book on transactional programming. We have
two goals in this section: to familiarize readers with the
transactional interfaces of Berkeley DB and to provide code
building blocks that will be useful for creating
applications.
</p>
<p>
We have not attempted to present this information using a
real-world application. First, transactional applications are
often complex and time-consuming to explain. Also, one of our
goals is to give you an understanding of the wide variety of
tools Berkeley DB makes available to you, and no single
application would use most of the interfaces included in the
Berkeley DB library. For these reasons, we have chosen to
simply present the Berkeley DB data structures and programming
solutions, using examples that differ from page to page. All
the examples are included in a standalone program you can
examine, modify, and run; and from which you will be able to
extract code blocks for your own applications. Fragments of
the program will be presented throughout this chapter, and the
complete text of the <a class="ulink" href="transapp.cs" target="_top">example
program</a> for IEEE/ANSI Std 1003.1 (POSIX) standard
systems is included in the Berkeley DB distribution.
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