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- <?xml version="1.0"?>
- <!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
- <?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
- <!-- $Revision: 1.5.2.5 $ -->
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- <!--
- Copyright 2002-2004 The Apache Software Foundation
-
- 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
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- http://www.apache.org/licenses/LICENSE-2.0
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- 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
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-
- <modulesynopsis metafile="mod_disk_cache.xml.meta">
-
- <name>mod_disk_cache</name>
- <description>Content cache storage manager keyed to URIs</description>
- <status>Experimental</status>
- <sourcefile>mod_disk_cache.c</sourcefile>
- <identifier>disk_cache_module</identifier>
-
- <summary>
- <note type="warning">
- This module is experimental. Documentation is still under development...
- </note>
-
- <p><module>mod_disk_cache</module> implements a disk based storage
- manager. It is primarily of use in conjunction with
- <module>mod_proxy</module>.</p>
-
- <p>Content is stored in and retrieved from the cache using URI based
- keys. Content with access protection is not cached.</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>CacheSize</name>
- <description>The maximum amount of disk space that will be used by the
- cache in KBytes</description>
- <syntax>CacheSize <var>KBytes</var></syntax>
- <default>CacheSize 1000000</default>
- <contextlist><context>server config</context><context>virtual host</context>
- </contextlist>
-
- <usage>
- <p>The <directive>CacheSize</directive> directive sets the desired
- disk space usage of the cache, in KBytes (1024-byte units). This
- directive does not put a hard limit on the size of the cache. The
- garbage collector will delete files until the usage is at or below the
- settings. Always use a value that is lower than the available disk
- space.</p>
-
- <example>
- CacheSize 5000000
- </example>
- </usage>
- </directivesynopsis>
-
- <directivesynopsis>
- <name>CacheGcInterval</name>
- <description>The interval between garbage collection attempts.</description>
- <syntax>CacheGcInterval <var>hours</var></syntax>
- <contextlist><context>server config</context><context>virtual host</context>
- </contextlist>
-
- <usage>
- <p>The <directive>CacheGcInterval</directive> directive specifies the
- number of hours to wait between attempts to free up disk space.</p>
- <p>More detail will be added here, when the function is implemented.</p>
-
- <example>
- CacheGcInterval 24<br />
- </example>
-
- <note type="warning">
- The <directive>CacheGcInterval</directive> directive is currently
- <em>not</em> implemented.
- </note>
- </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>CacheExpiryCheck</name>
- <description>Indicates if the cache observes Expires dates when seeking
- files</description>
- <syntax>CacheExpiryCheck On|Off</syntax>
- <default>CacheExpiryCheck On</default>
- <contextlist><context>server config</context><context>virtual host</context>
- </contextlist>
-
- <usage>
- <p>More detail will be added here, when the function is implemented.</p>
-
- <example>
- CacheExpiryCheck Off<br />
- </example>
-
- <note type="warning">
- The <directive>CacheExpiryCheck</directive> directive is currently
- <em>not</em> implemented.
- </note>
- </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>
-
- <directivesynopsis>
- <name>CacheTimeMargin</name>
- <description>The minimum time margin to cache a document</description>
- <syntax>CacheTimeMargin <var>?</var></syntax>
- <default>CacheTimeMargin ?</default>
- <contextlist><context>server config</context><context>virtual host</context>
- </contextlist>
-
- <usage>
- <p>More detail will be added here, when the function is implemented.</p>
-
- <example>
- CacheTimeMargin X
- </example>
-
- <note type="warning">
- The <directive>CacheTimeMargin</directive> directive is currently
- <em>not</em> implemented.
- </note>
- </usage>
- </directivesynopsis>
-
- <directivesynopsis>
- <name>CacheGcDaily</name>
- <description>The recurring time each day for garbage collection to be run.
- (24 hour clock)</description>
- <syntax>CacheGcDaily <var>time</var></syntax>
- <default>CacheGcDaily ?</default>
- <contextlist><context>server config</context><context>virtual host</context>
- </contextlist>
-
- <usage>
- <p>More detail will be added here, when the function is implemented.</p>
-
- <example>
- CacheGcDaily 23:59
- </example>
-
- <note type="warning">
- The <directive>CacheGcDaily</directive> directive is currently
- <em>not</em> implemented.
- </note>
- </usage>
- </directivesynopsis>
-
- <directivesynopsis>
- <name>CacheGcUnused</name>
- <description>The time to retain unreferenced cached files that match a
- URL.</description>
- <syntax>CacheGcUnused <var>hours</var> <var>url-string</var></syntax>
- <default>CacheGcUnused ?</default>
- <contextlist><context>server config</context><context>virtual host</context>
- </contextlist>
-
- <usage>
- <p>More detail will be added here, when the function is implemented.</p>
-
- <example>
- CacheGcUnused 12 /local_images
- </example>
-
- <note type="warning">
- The <directive>CacheGcUnused</directive> directive is currently
- <em>not</em> implemented.
- </note>
- </usage>
- </directivesynopsis>
-
- <directivesynopsis>
- <name>CacheGcClean</name>
- <description>The time to retain unchanged cached files that match a
- URL</description>
- <syntax>CacheGcClean <var>hours</var> <var>url-string</var></syntax>
- <default>CacheGcClean ?</default>
- <contextlist><context>server config</context><context>virtual host</context>
- </contextlist>
-
- <usage>
- <p>More detail will be added here, when the function is implemented.</p>
-
- <example>
- CacheGcClean 12 /daily_scripts
- </example>
-
- <note type="warning">
- The <directive>CacheGcClean</directive> directive is currently
- <em>not</em> implemented.
- </note>
- </usage>
- </directivesynopsis>
-
- <directivesynopsis>
- <name>CacheGcMemUsage</name>
- <description>The maximum kilobytes of memory used for garbage
- collection</description>
- <syntax>CacheGcMemUsage <var>KBytes</var></syntax>
- <default>CacheGcMemUsage ?</default>
- <contextlist><context>server config</context><context>virtual host</context>
- </contextlist>
-
- <usage>
- <p>More detail will be added here, when the function is implemented.</p>
-
- <example>
- CacheGcMemUsage 16
- </example>
-
- <note type="warning">
- The <directive>CacheGcMemUsage</directive> directive is currently
- <em>not</em> implemented.
- </note>
- </usage>
- </directivesynopsis>
-
- </modulesynopsis>
-