---
layout: doclandingpage
title: "Documentation"
is_homepage: false
is_sphinx_doc: false
---

  <h2>Apache Cassandra Documentation v4.0-alpha5</h2>
  
<div id="wipwarning">This documentation is a work-in-progress.
    <a href="bugs.html">Contributions</a> are welcome.</div>

<h3>Main documentation</h3>

<div>
<form id="doc-search-form" action="search.html" method="get" role="search">
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    Search the documentation:
    <input type="text" size="30" class="form-control input-sm" name="q" placeholder="Search docs">
    <input type="hidden" name="check_keywords" value="yes" />
    <input type="hidden" name="area" value="default" />
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<table class="contentstable doc-landing-table" align="center">
  <tr>
    <td class="left-column">
      <p class="biglink"><a class="biglink" href="getting_started/index.html">Getting started</a><br/>
      <span class="linkdescr">Newbie friendly starting point</span></p>
    </td>
    <td class="right-column">
      <p class="biglink"><a class="biglink" href="operating/index.html">Operating Cassandra</a><br/>
      <span class="linkdescr">The operator's corner</span></p>
    </td>
  </tr>
  <tr>
    <td class="left-column">
      <p class="biglink"><a class="biglink" href="architecture/index.html">Cassandra Architecture</a><br/>
      <span class="linkdescr">Cassandra's big picture</span></p>
    </td>
    <td class="right-column">
      <p class="biglink"><a class="biglink" href="tools/index.html">Cassandra's Tools</a><br/>
      <span class="linkdescr">cqlsh, nodetool, ...</span></p>
    </td>
  </tr>
  <tr>
    <td class="left-column">
      <p class="biglink"><a class="biglink" href="data_modeling/index.html">Data Modeling</a><br/>
      <span class="linkdescr">Hint: it's not relational</span></p>
    </td>
    <td class="right-column">
      <p class="biglink"><a class="biglink" href="troubleshooting/index.html">Troubleshooting</a><br/>
      <span class="linkdescr">What to look for when you have a problem</span></p>
    </td>
  </tr>
  <tr>
    <td class="left-column">
      <p class="biglink"><a class="biglink" href="cql/index.html">Cassandra Query Language</a><br/>
      <span class="linkdescr">CQL reference documentation</span></p>
    </td>
    <td class="right-column">
      <p class="biglink"><a class="biglink" href="development/index.html">Cassandra Development</a><br/>
      <span class="linkdescr">Learn how to improve Cassandra and contribute patches</span></p>
    </td>
  </tr>
  <tr>
    <td class="left-column">
      <p class="biglink"><a class="biglink" href="faq/index.html">FAQs</a><br/>
      <span class="linkdescr">Frequently Asked Questions (with answers!)</span></p>
    </td>
    <td class="right-column">
      <p class="biglink"><a class="biglink" href="configuration/index.html">Configuration</a><br/>
      <span class="linkdescr">Cassandra's handles and knobs</span></p>
    </td>
  </tr>
</table>

<h3>Meta informations</h3>

<ul>
  <li><a class="biglink" href="bugs.html">Reporting bugs</a></li>
  <li><a class="biglink" href="contactus.html">Contact us</a></li>
</ul>