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<title>mod_disk_cache － Apache 2.2 中文版参考手册</title>
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<div id="page-content"><div id="preamble"><h1>Apache模块 mod_disk_cache</h1>
<table border="1" cellpadding="0" cellspacing="0" bordercolor="#AAAAAA" class="module">
<tr><th><a href="module-dict.html#Description">说明</a></th><td>基于磁盘的缓冲管理器</td></tr>
<tr><th><a href="module-dict.html#Status">状态</a></th><td>扩展(E)</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">模块名</a></th><td>disk_cache_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">源文件</a></th><td>mod_disk_cache.c</td></tr>
</table>
<h3>概述</h3>
<p><code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code> implements a disk based storage
manager. It is primarily of use in conjunction
<code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code>.</p>
<p>Content is stored in and retrieved from the cache using URI based
keys. Content with access protection is not cached.</p>
<p><code class="program"><a href="../programs/htcacheclean.html">htcacheclean</a></code> can be used to maintain the cache
size at a maximum level.</p>
<div class="note"><h3>注意：</h3>
<p><code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code> requires the services of
<code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code>.</p>
</div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="CacheDirLength" id="CacheDirLength">CacheDirLength</a> <a name="cachedirlength" id="cachedirlength">指令</a></h2>
<table border="1" cellpadding="0" cellspacing="0" bordercolor="#AAAAAA" class="directive">
<tr><th><a href="directive-dict.html#Description">说明</a></th><td>The number of characters in subdirectory names</td></tr>
<tr><th><a href="directive-dict.html#Syntax">语法</a></th><td><code>CacheDirLength <var>length</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">默认值</a></th><td><code>CacheDirLength 2</code></td></tr>
<tr><th><a href="directive-dict.html#Context">作用域</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">状态</a></th><td>扩展(E)</td></tr>
<tr><th><a href="directive-dict.html#Module">模块</a></th><td>mod_disk_cache</td></tr>
</table>
<p><code class="directive">CacheDirLength</code> directive sets the number
of characters for each subdirectory name in the cache hierarchy.</p>
<div class="note">
<p>The result of <code class="directive"><a href="#cachedirlevels">CacheDirLevels</a></code>* <code class="directive">CacheDirLength</code>
must not be higher than 20.</p>
</div>
<div class="example"><p><code>
CacheDirLength 4
</code></p></div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="CacheDirLevels" id="CacheDirLevels">CacheDirLevels</a> <a name="cachedirlevels" id="cachedirlevels">指令</a></h2>
<table border="1" cellpadding="0" cellspacing="0" bordercolor="#AAAAAA" class="directive">
<tr><th><a href="directive-dict.html#Description">说明</a></th><td>The number of levels of subdirectories in the
cache.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">语法</a></th><td><code>CacheDirLevels <var>levels</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">默认值</a></th><td><code>CacheDirLevels 3</code></td></tr>
<tr><th><a href="directive-dict.html#Context">作用域</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">状态</a></th><td>扩展(E)</td></tr>
<tr><th><a href="directive-dict.html#Module">模块</a></th><td>mod_disk_cache</td></tr>
</table>
<p><code class="directive">CacheDirLevels</code> directive sets the number
of subdirectory levels in the cache. Cached data will be saved this
many directory levels below the <code class="directive"><a href="#cacheroot">CacheRoot</a></code> directory.</p>
<div class="note">
<p>The result of <code class="directive">CacheDirLevels</code>*
<code class="directive"><a href="#cachedirlength">CacheDirLength</a></code> must
not be higher than 20.</p>
</div>
<div class="example"><p><code>
CacheDirLevels 5
</code></p></div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="CacheMaxFileSize" id="CacheMaxFileSize">CacheMaxFileSize</a> <a name="cachemaxfilesize" id="cachemaxfilesize">指令</a></h2>
<table border="1" cellpadding="0" cellspacing="0" bordercolor="#AAAAAA" class="directive">
<tr><th><a href="directive-dict.html#Description">说明</a></th><td>The maximum size (in bytes) of a document to be placed in the
cache</td></tr>
<tr><th><a href="directive-dict.html#Syntax">语法</a></th><td><code>CacheMaxFileSize <var>bytes</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">默认值</a></th><td><code>CacheMaxFileSize 1000000</code></td></tr>
<tr><th><a href="directive-dict.html#Context">作用域</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">状态</a></th><td>扩展(E)</td></tr>
<tr><th><a href="directive-dict.html#Module">模块</a></th><td>mod_disk_cache</td></tr>
</table>
<p><code class="directive">CacheMaxFileSize</code> directive sets the
maximum size, in bytes, for a document to be considered for storage in
the cache.</p>
<div class="example"><p><code>
CacheMaxFileSize 64000
</code></p></div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="CacheMinFileSize" id="CacheMinFileSize">CacheMinFileSize</a> <a name="cacheminfilesize" id="cacheminfilesize">指令</a></h2>
<table border="1" cellpadding="0" cellspacing="0" bordercolor="#AAAAAA" class="directive">
<tr><th><a href="directive-dict.html#Description">说明</a></th><td>The minimum size (in bytes) of a document to be placed in the
cache</td></tr>
<tr><th><a href="directive-dict.html#Syntax">语法</a></th><td><code>CacheMinFileSize <var>bytes</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">默认值</a></th><td><code>CacheMinFileSize 1</code></td></tr>
<tr><th><a href="directive-dict.html#Context">作用域</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">状态</a></th><td>扩展(E)</td></tr>
<tr><th><a href="directive-dict.html#Module">模块</a></th><td>mod_disk_cache</td></tr>
</table>
<p><code class="directive">CacheMinFileSize</code> directive sets the
minimum size, in bytes, for a document to be considered for storage
in the cache.</p>
<div class="example"><p><code>
CacheMinFileSize 64
</code></p></div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="CacheRoot" id="CacheRoot">CacheRoot</a> <a name="cacheroot" id="cacheroot">指令</a></h2>
<table border="1" cellpadding="0" cellspacing="0" bordercolor="#AAAAAA" class="directive">
<tr><th><a href="directive-dict.html#Description">说明</a></th><td>The directory root under which cache files are
stored</td></tr>
<tr><th><a href="directive-dict.html#Syntax">语法</a></th><td><code>CacheRoot <var>directory</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">作用域</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Status">状态</a></th><td>扩展(E)</td></tr>
<tr><th><a href="directive-dict.html#Module">模块</a></th><td>mod_disk_cache</td></tr>
</table>
<p><code class="directive">CacheRoot</code> directive defines the name of
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
Apache server, this directive <em>must</em> be defined. Failing to
provide a value for <code class="directive">CacheRoot</code> will result in
a configuration file processing error. The <code class="directive"><a href="#cachedirlevels">CacheDirLevels</a></code>和<code class="directive"><a href="#cachedirlength">CacheDirLength</a></code> directives define
the structure of the directories under the specified root directory.</p>
<div class="example"><p><code>
CacheRoot c:/cacheroot
</code></p></div>
</div>
</div>
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