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<div id="head"><h3><a href="Home.html">Aurelius Titan 0.3.0</a></h3>
<h1>Release Notes</h1>
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<p>Titan: Distributed Graph Database<br /><a href="http://thinkaurelius.github.com/titan/">http://thinkaurelius.github.com/titan/</a></p>
<p><img src="https://raw.github.com/thinkaurelius/titan/master/doc/images/titan-globe.png" width="100px" /></p>
<h2>Titan 0.y.z<a class="anchor" id="Titan-0.y.z" href="#Titan-0.y.z"></a></h2>
<h3>Version 0.3.0 (March 29, 2013)<a class="anchor" id="Version-0.3.0-(March-29,-2013)" href="#Version-0.3.0-(March-29,-2013)"></a></h3>
<div class="highlight"><pre><span class="nt"><dependency></span>
<span class="nt"><groupId></span>com.thinkaurelius.titan<span class="nt"></groupId></span>
<span class="nt"><artifactId></span>titan-core<span class="nt"></artifactId></span>
<span class="nt"><version></span>0.3.0<span class="nt"></version></span>
<span class="nt"></dependency></span>
</pre></div><br /><strong>Tested Compatibility:</strong>
<ul><li>Cassandra 1.2.2</li>
<li>HBase 0.94</li>
<li>BerkeleyJE 5.0.73</li>
</ul><p><strong>Features:</strong></p>
<ul><li>Geo, numeric range, and full-text indexing supporting multiple index backends</li>
<li>Edge Indexing</li>
<li>Refactoring of Titan-core for enhanced performance due to selective de-serialization</li>
<li>New query optimizer for vertex-centric and graph queries</li>
<li>Vertex centric query caching for selective queries</li>
<li>InMemoryGraph implementation</li>
<li>IdGraph support</li>
<li>Relaxed transactional scope requirement for vertices</li>
<li>Edge now longer extends Vertex</li>
<li>Updated to Kryo 2</li>
</ul><p><strong>Bugfixes:</strong></p>
<ul><li>Cassandra Thrift Max-Message-Size issue</li>
<li><span class="caps">JMX</span> settings for Titan Server</li>
<li>Out-unique edges</li>
<li>Modified state in global graph operations</li>
<li>see issue tracker for a full list</li>
</ul><h3>Version 0.2.1 (March 22, 2013)<a class="anchor" id="Version-0.2.1-(March-22,-2013)" href="#Version-0.2.1-(March-22,-2013)"></a></h3>
<div class="highlight"><pre><span class="nt"><dependency></span>
<span class="nt"><groupId></span>com.thinkaurelius.titan<span class="nt"></groupId></span>
<span class="nt"><artifactId></span>titan-core<span class="nt"></artifactId></span>
<span class="nt"><version></span>0.2.1<span class="nt"></version></span>
<span class="nt"></dependency></span>
</pre></div><br /><strong>Tested Compatibility:</strong>
<ul><li>Cassandra 1.2.0</li>
<li>HBase 0.94</li>
<li>BerkeleyJE 5.0.58</li>
</ul><p><strong>Features:</strong></p>
<ul><li>Refactored <span class="caps">POM</span> into multi-module project</li>
<li>Support for global vertex (g.V) and edge (g.E) iteration for cassandra and hbase backends</li>
<li>Compatible with Cassandra 1.2.0 for all three storage adapters: embedded, thrift, astyanax</li>
<li>Improved HBase adapter:
<ul><li>Automatic Master launch for testing</li>
<li>Refactored batch mutation and reading</li>
<li>Optimized HBase operations</li>
</ul></li>
<li>Updated to Blueprints 2.3.0</li>
<li>Better integration with Rexster Rexpro</li>
<li>Automatic directory creation for local storage backends</li>
<li>Internal Titan version handling and compatibility checks</li>
<li>Added additional performance tests</li>
</ul><p><strong>Bugfixes:</strong></p>
<ul><li>Resolved issues around Java 1.7</li>
<li>Shutdown error in astyanax adapter</li>
<li>Made thrift frame and message size configurable for cassandra adapters</li>
<li>see issue tracker for a full list</li>
</ul><p><strong>Special Thanks to:</strong></p>
<ul><li>Pavel Yaskevich (<a href="https://github.com/xedin">xedin</a>)</li>
</ul><hr /><h3>Version 0.2.0 (December 24, 2012)<a class="anchor" id="Version-0.2.0-(December-24,-2012)" href="#Version-0.2.0-(December-24,-2012)"></a></h3>
<div class="highlight"><pre><span class="nt"><dependency></span>
<span class="nt"><groupId></span>com.thinkaurelius.titan<span class="nt"></groupId></span>
<span class="nt"><artifactId></span>titan<span class="nt"></artifactId></span>
<span class="nt"><version></span>0.2.0<span class="nt"></version></span>
<span class="nt"></dependency></span>
</pre></div><br /><strong>Tested Compatibility:</strong>
<ul><li>Cassandra 1.1.3 & 1.1.4</li>
<li>HBase 0.94.1</li>
<li>BerkeleyDB 5.0.58</li>
<li>TinkerPop (Blueprints, Gremlin, Rexster) 2.2.0</li>
</ul><ul><li>This version is incompatible with the previous version of Titan. Please follow the <a class="internal present" href="Upgrade-Instructions.html">Upgrade Instructions</a> to switch to the new version.</li>
</ul><p><strong>Features:</strong></p>
<ul><li>Embedded Cassandra: Titan can be embedded with Cassandra, that means, Titan starts a Cassandra node in the same <span class="caps">JVM</span> and uses efficient in process communication to store and retrieve data.</li>
<li><a class="internal present" href="Titan-Server.html">Titan Server</a>: Titan comes with a light-weight Gremlin query server.</li>
<li>Streamlined configuration settings. Please review the new configuration options if you are upgrading from an older version of Titan.</li>
<li>Many small performance improvements throughout the code. Please review the issue tracker and the commit log for more details.</li>
</ul><p><strong>Bugfixes:</strong></p>
<ul><li>Fixed edge sorting bug which caused edges to be returned in a random order even when a vertex centric index was defined.</li>
<li>Fixed id allocation bug that causes Titan to read the entire row during id allocation which can lead to id allocation failures.</li>
<li>Completely refactored diskstorage package for better code quality and performance.</li>
<li>Fixed edge caching bug for composite primary keys on edges.</li>
<li>Fixed a number of smaller bugs. Please review the issue tracker and the commit log for more details.</li>
</ul><p><strong>Special Thanks to:</strong></p>
<ul><li>Zack Maril (<a href="https://github.com/zmaril">zmaril</a>)</li>
<li>Nicolas LaCasse (<a href="https://github.com/nlacasse">nlacasse</a>)</li>
<li>Vadas Gintautas (<a href="https://github.com/vadasg">vadasg</a>)</li>
</ul><hr /><h3>Version 0.1.0 (September 7, 2012)<a class="anchor" id="Version-0.1.0-(September-7,-2012)" href="#Version-0.1.0-(September-7,-2012)"></a></h3>
<div class="highlight"><pre><span class="nt"><dependency></span>
<span class="nt"><groupId></span>com.thinkaurelius.titan<span class="nt"></groupId></span>
<span class="nt"><artifactId></span>titan<span class="nt"></artifactId></span>
<span class="nt"><version></span>0.1.0<span class="nt"></version></span>
<span class="nt"></dependency></span>
</pre></div><br /><strong>Tested Compatibility:</strong>
<ul><li>Cassandra 1.1.3 & 1.1.4</li>
<li>HBase 0.94.1</li>
<li>BerkeleyDB 5.0.58</li>
</ul><p><strong>Features:</strong></p>
<ul><li>The focus of the initial Titan release was on building a stable and robust graph database as well as incorporating community feature suggestions and feedback from early adopters of Titan.</li>
</ul><p><strong>Bugfixes:</strong></p>
<ul><li>Fixed concurrency and synchronization issues</li>
</ul><p><strong>Special Thanks to:</strong></p>
<ul><li>Danny Thomas (<a href="https://github.com/BinaryRage">BinaryRage</a>)</li>
<li><a href="https://github.com/jramsdale">jramsdale</a></li>
<li>Cristofer (<a href="https://github.com/crisweber">crisweber</a>)</li>
<li><a href="https://github.com/tedoc2000">tedoc2000</a></li>
<li>Dan Forest-Barbier (<a href="https://github.com/DPanth3r">DPanth3r</a>)</li>
<li><a href="https://github.com/jncorpron">jncorpron</a></li>
<li>Marc Abramowitz (<a href="https://github.com/msabramo">msabramo</a>)</li>
</ul>
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<p id="last-edit">Last edited by <b>mbroecheler</b>, 2013-03-29 06:50:19</p>
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