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Extensible Markup Language  |  2007-09-01  |  12KB  |  178 lines
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  8. <title>mod_disk_cache - Apache HTTP Server</title>
  9. <link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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  13. <body>
  14. <div id="page-header">
  15. <p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
  16. <p class="apache">Apache HTTP Server Version 2.2</p>
  17. <img alt="" src="../images/feather.gif" /></div>
  18. <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
  19. <div id="path">
  20. <a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.2</a> > <a href="./">Modules</a></div>
  21. <div id="page-content">
  22. <div id="preamble"><h1>Apache Module mod_disk_cache</h1>
  23. <div class="toplang">
  24. <p><span>Available Languages: </span><a href="../en/mod/mod_disk_cache.html" title="English"> en </a> |
  25. <a href="../ja/mod/mod_disk_cache.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
  26. <a href="../ko/mod/mod_disk_cache.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
  27. </div>
  28. <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Content cache storage manager keyed to URIs</td></tr>
  29. <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  30. <tr><th><a href="module-dict.html#ModuleIdentifier">ModuleáIdentifier:</a></th><td>disk_cache_module</td></tr>
  31. <tr><th><a href="module-dict.html#SourceFile">SourceáFile:</a></th><td>mod_disk_cache.c</td></tr></table>
  32. <h3>Summary</h3>
  33.  
  34.     <p><code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code> implements a disk based storage
  35.     manager. It is primarily of use in conjunction
  36.     <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code>.</p>
  37.  
  38.     <p>Content is stored in and retrieved from the cache using URI based
  39.     keys. Content with access protection is not cached.</p>
  40.  
  41.     <p><code class="program"><a href="../programs/htcacheclean.html">htcacheclean</a></code> can be used to maintain the cache
  42.        size at a maximum level.</p>
  43.  
  44.     <div class="note"><h3>Note:</h3>
  45.       <p><code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code> requires the services of
  46.       <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code>.</p>
  47.     </div>
  48. </div>
  49. <div id="quickview"><h3 class="directives">Directives</h3>
  50. <ul id="toc">
  51. <li><img alt="" src="../images/down.gif" /> <a href="#cachedirlength">CacheDirLength</a></li>
  52. <li><img alt="" src="../images/down.gif" /> <a href="#cachedirlevels">CacheDirLevels</a></li>
  53. <li><img alt="" src="../images/down.gif" /> <a href="#cachemaxfilesize">CacheMaxFileSize</a></li>
  54. <li><img alt="" src="../images/down.gif" /> <a href="#cacheminfilesize">CacheMinFileSize</a></li>
  55. <li><img alt="" src="../images/down.gif" /> <a href="#cacheroot">CacheRoot</a></li>
  56. </ul>
  57. </div>
  58.  
  59. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  60. <div class="directive-section"><h2><a name="CacheDirLength" id="CacheDirLength">CacheDirLength</a> <a name="cachedirlength" id="cachedirlength">Directive</a></h2>
  61. <table class="directive">
  62. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The number of characters in subdirectory names</td></tr>
  63. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheDirLength <var>length</var></code></td></tr>
  64. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheDirLength 2</code></td></tr>
  65. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
  66. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  67. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_disk_cache</td></tr>
  68. </table>
  69.     <p>The <code class="directive">CacheDirLength</code> directive sets the number
  70.     of characters for each subdirectory name in the cache hierarchy.</p>
  71.  
  72.     <div class="note">
  73.       <p>The result of <code class="directive"><a href="#cachedirlevels">CacheDirLevels</a></code>* <code class="directive">CacheDirLength</code>
  74.       must not be higher than 20.</p>
  75.     </div>
  76.  
  77.     <div class="example"><p><code>
  78.       CacheDirLength  4
  79.     </code></p></div>
  80.  
  81. </div>
  82. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  83. <div class="directive-section"><h2><a name="CacheDirLevels" id="CacheDirLevels">CacheDirLevels</a> <a name="cachedirlevels" id="cachedirlevels">Directive</a></h2>
  84. <table class="directive">
  85. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The number of levels of subdirectories in the
  86. cache.</td></tr>
  87. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheDirLevels <var>levels</var></code></td></tr>
  88. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheDirLevels 3</code></td></tr>
  89. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
  90. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  91. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_disk_cache</td></tr>
  92. </table>
  93.     <p>The <code class="directive">CacheDirLevels</code> directive sets the number
  94.     of subdirectory levels in the cache. Cached data will be saved this
  95.     many directory levels below the <code class="directive"><a href="#cacheroot">CacheRoot</a></code> directory.</p>
  96.  
  97.     <div class="note">
  98.       <p>The result of <code class="directive">CacheDirLevels</code>*
  99.       <code class="directive"><a href="#cachedirlength">CacheDirLength</a></code> must
  100.       not be higher than 20.</p>
  101.     </div>
  102.  
  103.     <div class="example"><p><code>
  104.       CacheDirLevels  5
  105.     </code></p></div>
  106.  
  107. </div>
  108. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  109. <div class="directive-section"><h2><a name="CacheMaxFileSize" id="CacheMaxFileSize">CacheMaxFileSize</a> <a name="cachemaxfilesize" id="cachemaxfilesize">Directive</a></h2>
  110. <table class="directive">
  111. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The maximum size (in bytes) of a document to be placed in the
  112. cache</td></tr>
  113. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheMaxFileSize <var>bytes</var></code></td></tr>
  114. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheMaxFileSize 1000000</code></td></tr>
  115. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
  116. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  117. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_disk_cache</td></tr>
  118. </table>
  119.     <p>The <code class="directive">CacheMaxFileSize</code> directive sets the
  120.     maximum size, in bytes, for a document to be considered for storage in
  121.     the cache.</p>
  122.  
  123.     <div class="example"><p><code>
  124.       CacheMaxFileSize 64000
  125.     </code></p></div>
  126.  
  127. </div>
  128. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  129. <div class="directive-section"><h2><a name="CacheMinFileSize" id="CacheMinFileSize">CacheMinFileSize</a> <a name="cacheminfilesize" id="cacheminfilesize">Directive</a></h2>
  130. <table class="directive">
  131. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The minimum size (in bytes) of a document to be placed in the
  132. cache</td></tr>
  133. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheMinFileSize <var>bytes</var></code></td></tr>
  134. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheMinFileSize 1</code></td></tr>
  135. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
  136. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  137. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_disk_cache</td></tr>
  138. </table>
  139.     <p>The <code class="directive">CacheMinFileSize</code> directive sets the
  140.     minimum size, in bytes, for a document to be considered for storage
  141.     in the cache.</p>
  142.  
  143.     <div class="example"><p><code>
  144.       CacheMinFileSize 64
  145.     </code></p></div>
  146.  
  147. </div>
  148. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  149. <div class="directive-section"><h2><a name="CacheRoot" id="CacheRoot">CacheRoot</a> <a name="cacheroot" id="cacheroot">Directive</a></h2>
  150. <table class="directive">
  151. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The directory root under which cache files are
  152. stored</td></tr>
  153. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheRoot <var>directory</var></code></td></tr>
  154. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
  155. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  156. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_disk_cache</td></tr>
  157. </table>
  158.     <p>The <code class="directive">CacheRoot</code> directive defines the name of
  159.     the directory on the disk to contain cache files. If the <code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code> module has been loaded or compiled in to the
  160.     Apache server, this directive <em>must</em> be defined. Failing to
  161.     provide a value for <code class="directive">CacheRoot</code> will result in
  162.     a configuration file processing error. The <code class="directive"><a href="#cachedirlevels">CacheDirLevels</a></code> and <code class="directive"><a href="#cachedirlength">CacheDirLength</a></code> directives define
  163.     the structure of the directories under the specified root directory.</p>
  164.  
  165.     <div class="example"><p><code>
  166.       CacheRoot c:/cacheroot
  167.     </code></p></div>
  168.  
  169. </div>
  170. </div>
  171. <div class="bottomlang">
  172. <p><span>Available Languages: </span><a href="../en/mod/mod_disk_cache.html" title="English"> en </a> |
  173. <a href="../ja/mod/mod_disk_cache.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
  174. <a href="../ko/mod/mod_disk_cache.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
  175. </div><div id="footer">
  176. <p class="apache">Copyright 2007 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
  177. <p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div>
  178. </body></html>