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<h1 id="headline">Kyoto Cabinet: a straightforward implementation of DBM</h1>
<div class="note">Copyright (C) 2009-2012 FAL Labs</div>
<div class="note">Last Update: Fri, 04 Mar 2011 23:07:26 -0800</div>
<div class="logo"><img src="logo.png" id="logo" alt="Kyoto Cabinet" width="300" height="110" /></div>
<hr />
<h2 id="overview">Overview</h2>
<p>Kyoto Cabinet is a library of routines for managing a database. The database is a simple data file containing records, each is a pair of a key and a value. Every key and value is serial bytes with variable length. Both binary data and character string can be used as a key and a value. Each key must be unique within a database. There is neither concept of data tables nor data types. Records are organized in hash table or B+ tree.</p>
<p>Kyoto Cabinet runs very fast. For example, elapsed time to store one million records is 0.9 seconds for hash database, and 1.1 seconds for B+ tree database. Moreover, the size of database is very small. For example, overhead for a record is 16 bytes for hash database, and 4 bytes for B+ tree database. Furthermore, scalability of Kyoto Cabinet is great. The database size can be up to 8EB (9.22e18 bytes).</p>
<p>Kyoto Cabinet is written in the C++ language, and provided as API of C++, C, Java, Python, Ruby, Perl, and Lua. Kyoto Cabinet is available on platforms which have API conforming to C++03 with the TR1 library extensions. Kyoto Cabinet is a free software licensed under the GNU General Public License. On the other hand, a commercial license is also provided. If you use Kyoto Cabinet within a proprietary software, the commercial license is required.</p>
<hr />
<h2 id="documents">Documents</h2>
<p>The following are documents of Kyoto Cabinet. They are contained also in the source package.</p>
<ul>
<li><a href="spex.html">Fundamental Specifications</a></li>
<li><a href="command.html">Specifications of Command Line Utilities</a></li>
<li><a href="kyotoproducts.pdf">Presentation</a></li>
<li><a href="api/">API Documents of the core library (C/C++)</a></li>
</ul>
<ul>
<li><a href="http://fallabs.com/kyotocabinet/javadoc/">API Documents for Java</a></li>
<li><a href="http://fallabs.com/kyotocabinet/pythondoc/">API Documents for Python 3.x</a></li>
<li><a href="http://fallabs.com/kyotocabinet/pythonlegacydoc/">API Documents for Python 2.x</a></li>
<li><a href="http://fallabs.com/kyotocabinet/rubydoc/">API Documents for Ruby</a></li>
<li><a href="http://fallabs.com/kyotocabinet/perldoc/">API Documents for Perl</a></li>
<li><a href="http://fallabs.com/kyotocabinet/luadoc/">API Documents for Lua</a></li>
</ul>
<hr />
<h2 id="packages">Packages</h2>
<p>The following are the source packages of Kyoto Cabinet. As for binary packages, see the site of each distributor.</p>
<ul>
<li><a href="http://fallabs.com/kyotocabinet/pkg/">Source Packages of the core library (C/C++)</a></li>
</ul>
<ul>
<li><a href="http://fallabs.com/kyotocabinet/javapkg/">Source Packages for Java</a></li>
<li><a href="http://fallabs.com/kyotocabinet/pythonpkg/">Source Packages for Python 3.x</a></li>
<li><a href="http://fallabs.com/kyotocabinet/pythonlegacypkg/">Source Packages for Python 2.x</a></li>
<li><a href="http://fallabs.com/kyotocabinet/rubypkg/">Source Packages for Ruby</a></li>
<li><a href="http://fallabs.com/kyotocabinet/perlpkg/">Source Packages for Perl</a></li>
<li><a href="http://fallabs.com/kyotocabinet/luapkg/">Source Packages for Lua</a></li>
</ul>
<ul>
<li><a href="http://fallabs.com/kyotocabinet/winpkg/">Binary Packages for Windows (C/C++/Java)</a></li>
</ul>
<hr />
<h2 id="information">Information</h2>
<p>Kyoto Cabinet was written and is maintained by <a href="http://fallabs.com/">FAL Labs</a>. You can contact the author by e-mail to `info@fallabs.com'. If you want the commercial license, please see <a href="http://fallabs.com/license/">the license guide</a>.</p>
<p>The following are sibling projects of Kyoto Cabinet.</p>
<ul>
<li><a href="http://fallabs.com/kyototycoon/">Remote Service (Kyoto Tycoon)</a></li>
</ul>
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