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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>CouchDB | time to relax.</title>
<link rel="icon" href="favicon.png" />
<link rel="stylesheet" href="css/candela/stylesheet.css" type="text/css" charset="utf-8" />
<link rel="stylesheet" href="css/site.css" type="text/css" charset="utf-8" />
</head>
<body>
<div id="topslice">
<div class="content">
<header>
<blockquote cite="http://jacobian.org/writing/of-the-web/">
“I’ve never seen software that so completely embraces the philosophies behind HTTP... this is what the software of the future looks like.”<br />
— <a href="http://jacobian.org/writing/of-the-web/" target="_blank">Jacob Kaplan-Moss, Django creator</a>
</blockquote>
<div id="intro">
Goodbye, schemas and SQL.
Hello, JSON and MapReduce.
CouchDB is a database built for the web.
</div>
</header>
</div>
</div>
<div id="filling">
<div class="content">
<div class="colwrapper">
<nav>
<div>
<h3>Get it</h3>
<ul>
<li><a href="download.html">Download it</a></li>
<li><a href="previous.html">Previous releases</a></li>
<li><a href="pacman.html">Package managers</a></li>
<li><a href="subversion.html">Subversion</a></li>
</ul>
</div>
<div>
<h3>See it</h3>
<ul>
<li><a href="screenshots.html">Screenshots</a></li>
<li><a href="demo.html">Live demo</a></li>
<li><a href="wild.html">In the wild</a></li>
</ul>
</div>
<div>
<h3>Learn it</h3>
<ul>
<li><a href="overview.html">Overview</a></li>
<li><a href="wiki.html">Wiki</a></li>
<li><a href="books.html">Books</a></li>
<li><a href="planet.html">Planet</a></li>
<li><a href="mailing.html">Mailing lists</a></li>
</ul>
</div>
<div>
<h3>Contribute</h3>
<ul>
<li><a href="subversion.html">Subversion</a></li>
<li><a href="issues.html">Issue tracking</a></li>
<li><a href="committers.html">Committers</a></li>
<li><a href="coding.html">Coding standards</a></li>
<li><a href="promote.html">Promote it</a></li>
</ul>
</div>
</nav>
<article>
<section>
<h3>Flexible</h3>
<p>
Start saving your data today, then <strong>adapt your queries as your application evolves</strong>, without expensive schema migrations.
Query your data using familiar JavaScript (or your language of choice).
CouchDB's <strong>incremental Map Reduce</strong> views are <strong>optimized for real-time</strong> workloads, not overnight batch jobs.
</p>
</section>
<section>
<h3>Web scale</h3>
<p>
CouchDB scales from a smartphone to a data-center, and beyond.
The Erlang and REST-based implementation presents the <strong>same, simple API</strong>
whether running on a small local instance,
an ad-hoc network of collaborators,
or a multi-terabyte eventually-consistent cluster.
</p>
</section>
<section>
<h3>Reliable</h3>
<p>
CouchDB uses append-only storage for <strong>extreme durability</strong>. It never touches any bytes already written to disk, so even truncating a CouchDB database file yields a <strong>consistent snapshot</strong> of an older version of the database.
Writes are contiguous, giving CouchDB <strong>predictable performance</strong> even under heavily concurrent write load. The MVCC data model is ideal for concurrent operations that require <strong>consistency</strong>.
</p>
</section>
<section>
<h3>Ground computing</h3>
<p>
CouchDB solves the data-island problem, so you can <strong>write offline capable applications</strong>.
Peer-based replication allows for flexible deployments, data-sharing between organizations, and no-hassle backups.
CouchDB on the client offers <strong>better latency and reliability than traditional three-tier architectures</strong>. Ground computing is the future of the web.
</p>
</section>
<section>
<h3>Trusted</h3>
<p>
CouchDB is deployed by the <strong>BBC</strong>, Meebo, Cloudant and Ubuntu One.
It ships as a <strong>core feature of Ubuntu Linux.</strong>
There are access libraries available in nearly every language.
</p>
</section>
</article>
</div>
</div>
</div>
<div id="bottomslice">
<footer>
<strong>© Apache Software Foundation 2008–10.</strong>
</footer>
</div>
</body>
</html>