mod_disk_cache.xml revision 1e5b300cc68389a18fe3762b1b980b0c86712ba1
<?xml version="1.0"?>
<modulesynopsis>
<name>mod_disk_cache</name>
<description>Content cache keyed to URIs</description>
<status>Experimental</status>
<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 for use with <module>mod_proxy.</module></p>
<p>Content stored and retrived keyed to the URL. Content with
access protections is not cached.</p>
<note>
<p><module>mod_disk_cache</module> requires the services of <module>mod_cache</module>.</p>
</note>
</summary>
<directivesynopsis>
<name>CacheRoot</name>
<description>The directory to store cache files</description>
<syntax>CacheRoot <em>directory</em></syntax>
<default>none</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>The <directive>CacheRoot</directive> directive defines the name of the directory
on the disk to contain cache files. What is happening if not set ?</p>
<example>
CacheRoot c:/cacheroot <br />
</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 <em>KBytes</em></syntax>
<default>CacheSize 1000000</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>The <directive>MCacheSize</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>
MCacheSize 5000000 <br />
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheGcInterval</name>
<description>The interval between garbage collections</description>
<syntax>CacheGcInterval <em>hours</em></syntax>
<contextlist><context>server config</context></contextlist>
<usage>
<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 <em>levels</em></syntax>
<default>CacheDirLevels 3</default>
<contextlist><context>server config</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 <directive>CacheRoot</directive></p>
<note>
<p>CacheDirLevels*CacheDirLength value must not be higher than 20.</p>
</note>
<example>
CacheDirLevels 5 <br />
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheDirLength</name>
<description>The number of characters in subdirectory names</description>
<syntax>CacheDirLength <em>length</em></syntax>
<default>CacheDirLength 2</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>The <directive>CacheDirLength</directive> directive sets the number of
characters for each subdirectory in the cache</p>
<note>
<p>CacheDirLevels*CacheDirLength value must not be higher than 20.</p>
</note>
<example>
CacheDirLength 4 <br />
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheExpiryCheck</name>
<description>On if cache observes Expires date when seeking files</description>
<syntax>CacheExpiryCheck <em>binary</em></syntax>
<default>CacheExpiryCheck ?</default>
<contextlist><context>server config</context></contextlist>
<usage>
<example>
CacheExpiryCheck On<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 file to be placed in the cache</description>
<syntax>CacheMinFileSize <em>bytes</em></syntax>
<default>CacheMinFileSize 1</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>The <directive>CacheMinFileSize</directive> directive sets the minimum
size in bytes of a file to be cached.</p>
<example>
CacheMinFileSize 64<br />
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheMaxFileSize</name>
<description>The maximum size (in bytes) of a file to be placed in the cache</description>
<syntax>CacheMaxFileSize <em>bytes</em></syntax>
<default>CacheMaxFileSize 1000000</default>
<contextlist><context>server config</context></contextlist>
<usage>
<p>The <directive>CacheMaxFileSize</directive> directive sets the maximum
size in bytes of a file to be cached.</p>
<example>
CacheMaxFileSize 64000<br />
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheTimeMargin</name>
<description>The minimum time margin to cache a document</description>
<syntax>CacheTimeMargin <em>?</em></syntax>
<default>CacheTimeMargin ?</default>
<contextlist><context>server config</context></contextlist>
<usage>
<example>
CacheTimeMargin<br />
</example>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheGcDaily</name>
<description>The time of day for garbage collection (24 hour clock)</description>
<syntax>CacheGcDaily <em>time</em></syntax>
<default>CacheGcDaily ?</default>
<contextlist><context>server config</context></contextlist>
<usage>
<example>
CacheGcDaily<br />
</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 in hours to retain unused file that match a url</description>
<syntax>CacheGcUnused <em>hours</em></syntax>
<default>CacheGcUnused ?</default>
<contextlist><context>server config</context></contextlist>
<usage>
<example>
CacheGcUnused<br />
</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 in hours to retain unchanged files that match a url</description>
<syntax>CacheGcClean <em>hours</em></syntax>
<default>CacheGcClean ?</default>
<contextlist><context>server config</context></contextlist>
<usage>
<example>
CacheGcClean<br />
</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 <em>KBytes</em></syntax>
<default>CacheGcMemUsage ?</default>
<contextlist><context>server config</context></contextlist>
<usage>
<example>
CacheGcMemUsage<br />
</example>
<note type="warning">
The <directive>CacheGcMemUsage</directive> directive is currently <em>not</em> implemented.
</note>
</usage>
</directivesynopsis>
</modulesynopsis>