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<?xml version="1.0"?>
<!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
<!-- $LastChangedRevision$ -->
<!--
Copyright 2002-2006 The Apache Software Foundation or its licensors, as
applicable.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<modulesynopsis metafile="mod_disk_cache.xml.meta">
<name>mod_disk_cache</name>
<description>Content cache storage manager keyed to URIs</description>
<status>Extension</status>
<sourcefile>mod_disk_cache.c</sourcefile>
<identifier>disk_cache_module</identifier>
<summary>
<p><module>mod_disk_cache</module> implements a disk based storage
manager. It is primarily of use in conjunction
<module>mod_cache</module>.</p>
<p>Content is stored in and retrieved from the cache using URI based
keys. Content with access protection is not cached.</p>
<p><program>htcacheclean</program> can be used to maintain the cache
size at a maximum level.</p>
<note><title>Note:</title>
<p><module>mod_disk_cache</module> requires the services of
<module>mod_cache</module>.</p>
</note>
</summary>
<directivesynopsis>
<name>CacheRoot</name>
<description>The directory root under which cache files are
stored</description>
<syntax>CacheRoot <var>directory</var></syntax>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>
<usage>
<p>The <directive>CacheRoot</directive> directive defines the name of
the directory on the disk to contain cache files. If the <module
>mod_disk_cache</module> module has been loaded or compiled in to the
Apache server, this directive <em>must</em> be defined. Failing to
provide a value for <directive>CacheRoot</directive> will result in
a configuration file processing error. The <directive
module="mod_disk_cache">CacheDirLevels</directive> and <directive
module="mod_disk_cache">CacheDirLength</directive> directives define
the structure of the directories under the specified root directory.</p>
<example>
CacheRoot c:/cacheroot
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheDirLevels</name>
<description>The number of levels of subdirectories in the
cache.</description>
<syntax>CacheDirLevels <var>levels</var></syntax>
<default>CacheDirLevels 3</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>
<usage>
<p>The <directive>CacheDirLevels</directive> directive sets the number
of subdirectory levels in the cache. Cached data will be saved this
many directory levels below the <directive module="mod_disk_cache"
>CacheRoot</directive> directory.</p>
<note>
<p>The result of <directive>CacheDirLevels</directive>*
<directive module="mod_disk_cache">CacheDirLength</directive> must
not be higher than 20.</p>
</note>
<example>
CacheDirLevels 5
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheDirLength</name>
<description>The number of characters in subdirectory names</description>
<syntax>CacheDirLength <var>length</var></syntax>
<default>CacheDirLength 2</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>
<usage>
<p>The <directive>CacheDirLength</directive> directive sets the number
of characters for each subdirectory name in the cache hierarchy.</p>
<note>
<p>The result of <directive module="mod_disk_cache"
>CacheDirLevels</directive>* <directive>CacheDirLength</directive>
must not be higher than 20.</p>
</note>
<example>
CacheDirLength 4
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheMinFileSize</name>
<description>The minimum size (in bytes) of a document to be placed in the
cache</description>
<syntax>CacheMinFileSize <var>bytes</var></syntax>
<default>CacheMinFileSize 1</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>
<usage>
<p>The <directive>CacheMinFileSize</directive> directive sets the
minimum size, in bytes, for a document to be considered for storage
in the cache.</p>
<example>
CacheMinFileSize 64
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheMaxFileSize</name>
<description>The maximum size (in bytes) of a document to be placed in the
cache</description>
<syntax>CacheMaxFileSize <var>bytes</var></syntax>
<default>CacheMaxFileSize 1000000</default>
<contextlist><context>server config</context><context>virtual host</context>
</contextlist>
<usage>
<p>The <directive>CacheMaxFileSize</directive> directive sets the
maximum size, in bytes, for a document to be considered for storage in
the cache.</p>
<example>
CacheMaxFileSize 64000
</example>
</usage>
</directivesynopsis>
</modulesynopsis>
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