| --- |
| layout: docpage |
| |
| title: "Documentation" |
| |
| is_homepage: false |
| is_sphinx_doc: true |
| |
| doc-parent: "Getting Started" |
| |
| doc-title: "Configuring Cassandra" |
| doc-header-links: ' |
| <link rel="top" title="Apache Cassandra Documentation v4.0-beta3" href="../index.html"/> |
| <link rel="up" title="Getting Started" href="index.html"/> |
| <link rel="next" title="Inserting and querying" href="querying.html"/> |
| <link rel="prev" title="Installing Cassandra" href="installing.html"/> |
| ' |
| doc-search-path: "../search.html" |
| |
| extra-footer: ' |
| <script type="text/javascript"> |
| var DOCUMENTATION_OPTIONS = { |
| URL_ROOT: "", |
| VERSION: "", |
| COLLAPSE_INDEX: false, |
| FILE_SUFFIX: ".html", |
| HAS_SOURCE: false, |
| SOURCELINK_SUFFIX: ".txt" |
| }; |
| </script> |
| ' |
| |
| --- |
| <div class="container-fluid"> |
| <div class="row"> |
| <div class="col-md-3"> |
| <div class="doc-navigation"> |
| <div class="doc-menu" role="navigation"> |
| <div class="navbar-header"> |
| <button type="button" class="pull-left navbar-toggle" data-toggle="collapse" data-target=".sidebar-navbar-collapse"> |
| <span class="sr-only">Toggle navigation</span> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| </button> |
| </div> |
| <div class="navbar-collapse collapse sidebar-navbar-collapse"> |
| <form id="doc-search-form" class="navbar-form" action="../search.html" method="get" role="search"> |
| <div class="form-group"> |
| <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" /> |
| </div> |
| </form> |
| |
| |
| |
| <ul class="current"> |
| <li class="toctree-l1 current"><a class="reference internal" href="index.html">Getting Started</a><ul class="current"> |
| <li class="toctree-l2"><a class="reference internal" href="installing.html">Installing Cassandra</a></li> |
| <li class="toctree-l2 current"><a class="current reference internal" href="#">Configuring Cassandra</a><ul> |
| <li class="toctree-l3"><a class="reference internal" href="#main-runtime-properties">Main runtime properties</a></li> |
| <li class="toctree-l3"><a class="reference internal" href="#changing-the-location-of-directories">Changing the location of directories</a></li> |
| <li class="toctree-l3"><a class="reference internal" href="#environment-variables">Environment variables</a></li> |
| <li class="toctree-l3"><a class="reference internal" href="#logging">Logging</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l2"><a class="reference internal" href="querying.html">Inserting and querying</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="drivers.html">Client drivers</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="production.html">Production Recommendations</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../new/index.html">New Features in Apache Cassandra 4.0</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../architecture/index.html">Architecture</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../cql/index.html">The Cassandra Query Language (CQL)</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../data_modeling/index.html">Data Modeling</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../configuration/index.html">Configuring Cassandra</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../operating/index.html">Operating Cassandra</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../tools/index.html">Cassandra Tools</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../troubleshooting/index.html">Troubleshooting</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../development/index.html">Contributing to Cassandra</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../faq/index.html">Frequently Asked Questions</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../plugins/index.html">Third-Party Plugins</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../bugs.html">Reporting Bugs</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../contactus.html">Contact us</a></li> |
| </ul> |
| |
| |
| |
| </div><!--/.nav-collapse --> |
| </div> |
| </div> |
| </div> |
| <div class="col-md-8"> |
| <div class="content doc-content"> |
| <div class="content-container"> |
| |
| <div class="section" id="configuring-cassandra"> |
| <h1>Configuring Cassandra<a class="headerlink" href="#configuring-cassandra" title="Permalink to this headline">¶</a></h1> |
| <p>The <span class="xref std std-term">Cassandra</span> configuration files location varies, depending on the type of installation:</p> |
| <ul class="simple"> |
| <li>tarball: <code class="docutils literal notranslate"><span class="pre">conf</span></code> directory within the tarball install location</li> |
| <li>package: <code class="docutils literal notranslate"><span class="pre">/etc/cassandra</span></code> directory</li> |
| </ul> |
| <p>Cassandra’s default configuration file, <code class="docutils literal notranslate"><span class="pre">cassandra.yaml</span></code>, is sufficient to explore a simple single-node <span class="xref std std-term">cluster</span>. |
| However, anything beyond running a single-node cluster locally requires additional configuration to various Cassandra configuration files. |
| Some examples that require non-default configuration are deploying a multi-node cluster or using clients that are not running on a cluster node.</p> |
| <ul class="simple"> |
| <li><code class="docutils literal notranslate"><span class="pre">cassandra.yaml</span></code>: the main configuration file for Cassandra</li> |
| <li><code class="docutils literal notranslate"><span class="pre">cassandra-env.sh</span></code>: environment variables can be set</li> |
| <li><code class="docutils literal notranslate"><span class="pre">cassandra-rackdc.properties</span></code> OR <code class="docutils literal notranslate"><span class="pre">cassandra-topology.properties</span></code>: set rack and datacenter information for a cluster</li> |
| <li><code class="docutils literal notranslate"><span class="pre">logback.xml</span></code>: logging configuration including logging levels</li> |
| <li><code class="docutils literal notranslate"><span class="pre">jvm-*</span></code>: a number of JVM configuration files for both the server and clients</li> |
| <li><code class="docutils literal notranslate"><span class="pre">commitlog_archiving.properties</span></code>: set archiving parameters for the <span class="xref std std-term">commitlog</span></li> |
| </ul> |
| <p>Two sample configuration files can also be found in <code class="docutils literal notranslate"><span class="pre">./conf</span></code>:</p> |
| <ul class="simple"> |
| <li><code class="docutils literal notranslate"><span class="pre">metrics-reporter-config-sample.yaml</span></code>: configuring what the metrics-report will collect</li> |
| <li><code class="docutils literal notranslate"><span class="pre">cqlshrc.sample</span></code>: how the CQL shell, cqlsh, can be configured</li> |
| </ul> |
| <div class="section" id="main-runtime-properties"> |
| <h2>Main runtime properties<a class="headerlink" href="#main-runtime-properties" title="Permalink to this headline">¶</a></h2> |
| <p>Configuring Cassandra is done by setting yaml properties in the <code class="docutils literal notranslate"><span class="pre">cassandra.yaml</span></code> file. At a minimum you |
| should consider setting the following properties:</p> |
| <ul class="simple"> |
| <li><code class="docutils literal notranslate"><span class="pre">cluster_name</span></code>: Set the name of your cluster.</li> |
| <li><code class="docutils literal notranslate"><span class="pre">seeds</span></code>: A comma separated list of the IP addresses of your cluster <span class="xref std std-term">seed nodes</span>.</li> |
| <li><code class="docutils literal notranslate"><span class="pre">storage_port</span></code>: Check that you don’t have the default port of 7000 blocked by a firewall.</li> |
| <li><code class="docutils literal notranslate"><span class="pre">listen_address</span></code>: The <span class="xref std std-term">listen address</span> is the IP address of a node that allows it to communicate with other nodes in the cluster. Set to <cite>localhost</cite> by default. Alternatively, you can set <code class="docutils literal notranslate"><span class="pre">listen_interface</span></code> to tell Cassandra which interface to use, and consecutively which address to use. Set one property, not both.</li> |
| <li><code class="docutils literal notranslate"><span class="pre">native_transport_port</span></code>: Check that you don’t have the default port of 9042 blocked by a firewall, so that clients like cqlsh can communicate with Cassandra on this port.</li> |
| </ul> |
| </div> |
| <div class="section" id="changing-the-location-of-directories"> |
| <h2>Changing the location of directories<a class="headerlink" href="#changing-the-location-of-directories" title="Permalink to this headline">¶</a></h2> |
| <p>The following yaml properties control the location of directories:</p> |
| <ul class="simple"> |
| <li><code class="docutils literal notranslate"><span class="pre">data_file_directories</span></code>: One or more directories where data files, like <span class="xref std std-term">SSTables</span> are located.</li> |
| <li><code class="docutils literal notranslate"><span class="pre">commitlog_directory</span></code>: The directory where commitlog files are located.</li> |
| <li><code class="docutils literal notranslate"><span class="pre">saved_caches_directory</span></code>: The directory where saved caches are located.</li> |
| <li><code class="docutils literal notranslate"><span class="pre">hints_directory</span></code>: The directory where <span class="xref std std-term">hints</span> are located.</li> |
| </ul> |
| <p>For performance reasons, if you have multiple disks, consider putting commitlog and data files on different disks.</p> |
| </div> |
| <div class="section" id="environment-variables"> |
| <h2>Environment variables<a class="headerlink" href="#environment-variables" title="Permalink to this headline">¶</a></h2> |
| <p>JVM-level settings such as heap size can be set in <code class="docutils literal notranslate"><span class="pre">cassandra-env.sh</span></code>. You can add any additional JVM command line |
| argument to the <code class="docutils literal notranslate"><span class="pre">JVM_OPTS</span></code> environment variable; when Cassandra starts, these arguments will be passed to the JVM.</p> |
| </div> |
| <div class="section" id="logging"> |
| <h2>Logging<a class="headerlink" href="#logging" title="Permalink to this headline">¶</a></h2> |
| <p>The default logger is <cite>logback</cite>. By default it will log:</p> |
| <ul class="simple"> |
| <li><strong>INFO</strong> level in <code class="docutils literal notranslate"><span class="pre">system.log</span></code></li> |
| <li><strong>DEBUG</strong> level in <code class="docutils literal notranslate"><span class="pre">debug.log</span></code></li> |
| </ul> |
| <p>When running in the foreground, it will also log at INFO level to the console. You can change logging properties by editing <code class="docutils literal notranslate"><span class="pre">logback.xml</span></code> or by running the <cite>nodetool setlogginglevel</cite> command.</p> |
| </div> |
| </div> |
| |
| |
| |
| |
| <div class="doc-prev-next-links" role="navigation" aria-label="footer navigation"> |
| |
| <a href="querying.html" class="btn btn-default pull-right " role="button" title="Inserting and querying" accesskey="n">Next <span class="glyphicon glyphicon-circle-arrow-right" aria-hidden="true"></span></a> |
| |
| |
| <a href="installing.html" class="btn btn-default" role="button" title="Installing Cassandra" accesskey="p"><span class="glyphicon glyphicon-circle-arrow-left" aria-hidden="true"></span> Previous</a> |
| |
| </div> |
| |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |