EVOLUTION-MANAGER
Edit File: filedb.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>filedb notes — Whoosh 2.7.4 documentation</title> <link rel="stylesheet" href="../_static/default.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '2.7.4', 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> <link rel="top" title="Whoosh 2.7.4 documentation" href="../index.html" /> <link rel="up" title="Technical notes" href="index.html" /> <link rel="prev" title="How to implement a new backend" href="backend.html" /> </head> <body> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="backend.html" title="How to implement a new backend" accesskey="P">previous</a> |</li> <li><a href="../index.html">Whoosh 2.7.4 documentation</a> »</li> <li><a href="index.html" accesskey="U">Technical notes</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body"> <div class="section" id="filedb-notes"> <h1>filedb notes<a class="headerlink" href="#filedb-notes" title="Permalink to this headline">¶</a></h1> <p>TBD.</p> <div class="section" id="files-created"> <h2>Files created<a class="headerlink" href="#files-created" title="Permalink to this headline">¶</a></h2> <dl class="docutils"> <dt><revision_number>.toc</dt> <dd>The “master” file containing information about the index and its segments.</dd> </dl> <p>The index directory will contain a set of files for each segment. A segment is like a mini-index – when you add documents to the index, whoosh creates a new segment and then searches the old segment(s) and the new segment to avoid having to do a big merge every time you add a document. When you get enough small segments whoosh will merge them into larger segments or a single segment.</p> <dl class="docutils"> <dt><segment_number>.dci</dt> <dd>Contains per-document information (e.g. field lengths). This will grow linearly with the number of documents.</dd> <dt><segment_number>.dcz</dt> <dd>Contains the stored fields for each document.</dd> <dt><segment_number>.tiz</dt> <dd>Contains per-term information. The size of file will vary based on the number of unique terms.</dd> <dt><segment_number>.pst</dt> <dd>Contains per-term postings. The size of this file depends on the size of the collection and the formats used for each field (e.g. storing term positions takes more space than storing frequency only).</dd> <dt><segment_number>.fvz</dt> <dd>contains term vectors (forward indexes) for each document. This file is only created if at least one field in the schema stores term vectors. The size will vary based on the number of documents, field length, the formats used for each vector (e.g. storing term positions takes more space than storing frequency only), etc.</dd> </dl> </div> </div> </div> </div> </div> <div class="sphinxsidebar"> <div class="sphinxsidebarwrapper"> <h3><a href="../index.html">Table Of Contents</a></h3> <ul> <li><a class="reference internal" href="#">filedb notes</a><ul> <li><a class="reference internal" href="#files-created">Files created</a></li> </ul> </li> </ul> <h4>Previous topic</h4> <p class="topless"><a href="backend.html" title="previous chapter">How to implement a new backend</a></p> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../_sources/tech/filedb.txt" rel="nofollow">Show Source</a></li> </ul> <div id="searchbox" style="display: none"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <input type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> <p class="searchtip" style="font-size: 90%"> Enter search terms or a module, class or function name. </p> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="backend.html" title="How to implement a new backend" >previous</a> |</li> <li><a href="../index.html">Whoosh 2.7.4 documentation</a> »</li> <li><a href="index.html" >Technical notes</a> »</li> </ul> </div> <div class="footer"> © Copyright 2007-2012 Matt Chaput. Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.1.3. </div> </body> </html>