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page source</a> + + </li> + </ul> + <hr/> +</div> + <div role="main"> + + <div class="section" id="tablespaces"> +<h1>Tablespaces<a class="headerlink" href="#tablespaces" title="Permalink to this headline">¶</a></h1> +<p>Tablespaces in Tajo allow users to define locations in the storage system where the files or data objects representing database objects can be stored. Once defined, a tablespace can be referred to by name when creating a database or a table. Especially, it is very useful when a Tajo cluster instance should use heterogeneous storage systems such as HDFS, MySQL, and Oracle.</p> +<div class="section" id="configuration"> +<h2>Configuration<a class="headerlink" href="#configuration" title="Permalink to this headline">¶</a></h2> +<p>By default, Tajo use in <code class="docutils literal"><span class="pre">${tajo.rootdir}/warehouse</span></code> in <code class="docutils literal"><span class="pre">conf/tajo-site.xml</span></code> as a default tablespace. It also allows users to register additional tablespaces.</p> +<p><code class="docutils literal"><span class="pre">conf/storage-site.json</span></code> file.</p> +<p>The configuration file has the following struct:</p> +<div class="highlight-json"><div class="highlight"><pre><span class="p">{</span> + <span class="nt">"spaces"</span><span class="p">:</span> <span class="p">{</span> + <span class="nt">"${table_space_name}"</span><span class="p">:</span> <span class="p">{</span> + <span class="nt">"uri"</span><span class="p">:</span> <span class="s2">"hbase://quorum1:port,quorum2:port/"</span> + <span class="p">}</span> + <span class="p">}</span> +<span class="p">}</span> +</pre></div> +</div> +<p>The following is an example for two tablespaces for hbase and hdfs:</p> +<div class="highlight-json"><div class="highlight"><pre><span class="p">{</span> + <span class="nt">"spaces"</span><span class="p">:</span> <span class="p">{</span> + <span class="nt">"hbase-cluster1"</span><span class="p">:</span> <span class="p">{</span> + <span class="nt">"uri"</span><span class="p">:</span> <span class="s2">"hbase://quorum1:port,quorum2:port/"</span> + <span class="p">},</span> + + <span class="nt">"ssd"</span><span class="p">:</span> <span class="p">{</span> + <span class="nt">"uri"</span><span class="p">:</span> <span class="s2">"hdfs://host:port/data/ssd"</span> + <span class="p">}</span> + <span class="p">}</span> +<span class="p">}</span> +</pre></div> +</div> +<div class="admonition note"> +<p class="first admonition-title">Note</p> +<p class="last">Also, each tablespace can use different storage type. Please see <a class="reference internal" href="../storage_plugin.html"><em>Storage Plugin</em></a> if you want to know more information about it.</p> +</div> +</div> +</div> + + + </div> + <footer> + + <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation"> + + <a href="file_formats.html" class="btn btn-neutral float-right" title="File Formats"/>Next <span class="fa fa-arrow-circle-right"></span></a> + + + <a href="table_overview.html" class="btn btn-neutral" title="Overview of Tajo Tables"><span class="fa fa-arrow-circle-left"></span> Previous</a> + + </div> + + + <hr/> + + <div role="contentinfo"> + <p> + © Copyright 2014, Apache Tajo Team. + </p> + </div> + + <a href="https://github.com/snide/sphinx_rtd_theme";>Sphinx theme</a> provided by <a href="https://readthedocs.org";>Read the Docs</a> +</footer> + </div> + </div> + + </section> + + </div> + + + + + + <script type="text/javascript"> + var DOCUMENTATION_OPTIONS = { + URL_ROOT:'../', + VERSION:'0.11.0', + COLLAPSE_INDEX:false, + FILE_SUFFIX:'.html', + HAS_SOURCE: true + }; + </script> + <script type="text/javascript" src="../_static/jquery.js"></script> + <script type="text/javascript" src="../_static/underscore.js"></script> + <script type="text/javascript" src="../_static/doctools.js"></script> + + + + + + <script type="text/javascript" src="../_static/js/theme.js"></script> + + + + + <script type="text/javascript"> + jQuery(function () { + SphinxRtdTheme.StickyNav.enable(); + }); + </script> + + +</body> +</html> \ No newline at end of file
