<p>MongoDB (from "hu<b>mongo</b>us") is a scalable, high-performance, open source, schema-free, document-oriented database. Written in C++, MongoDB features:</p>
<ul>
<li>Document-oriented storage (the simplicity and power of <a href="/display/DOCS/BSON" title="BSON">JSON-like</a> data schemas)</li>
<li>Dynamic <a href="/display/DOCS/Querying" title="Querying">queries</a></li>
<li>Full <a href="/display/DOCS/Indexes" title="Indexes">index</a> support, extending to inner-objects and embedded arrays</li>
<li>Query <a href="/display/DOCS/Database+Profiler" title="Database Profiler">profiling</a></li>
<li>Fast, <a href="http://blog.mongodb.org/post/248614779/fast-updates-with-mongodb-update-in-place">in-place updates</a></li>
<li>Efficient storage of binary data <a href="/display/DOCS/GridFS" title="GridFS">large objects</a> (e.g. photos and videos)</li>
<li><a href="/display/DOCS/Replication" title="Replication">Replication</a> and fail-over support</li>
<li><a href="/display/DOCS/Sharding" title="Sharding">Auto-sharding</a> for cloud-level scalability</li>
<li><a href="/display/DOCS/MapReduce" title="MapReduce">MapReduce</a> for complex aggregation</li>
<li><a href="/display/DOCS/MongoDB+Commercial+Services+Providers" title="MongoDB Commercial Services Providers">Commercial Support, Training, and Consulting</a></li>
</ul>
<p>MongoDB bridges the gap between key-value stores (which are fast and highly scalable) and traditional RDBMS systems (which provide structured schemas and powerful queries).</p>
