<modulesynopsis>
<name>mod_disk_cache</name>
-<description>Content cache keyed to URIs</description>
+<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 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>
+ <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 <em>directory</em></syntax>
+<syntax>CacheRoot <var>directory</var></syntax>
<default>none</default>
-<contextlist><context>server config</context></contextlist>
+<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 mod_disk_cache 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
+ <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>CacheDirLevels</directive> and
- <directive>CacheDirLength</directive> directives define the structure of the directories
- under the specified root directory.</p>
+ <directive>CacheDirLength</directive> directives define the structure of
+ the directories under the specified root directory.</p>
-<example>
- CacheRoot c:/cacheroot <br />
-</example>
+ <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>
+<syntax>CacheSize <var>KBytes</var></syntax>
<default>CacheSize 1000000</default>
-<contextlist><context>server config</context></contextlist>
+<contextlist><context>server config</context><context>virtual host</context>
+</contextlist>
<usage>
<p>The <directive>CacheSize</directive> directive sets the desired disk space
<directivesynopsis>
<name>CacheGcInterval</name>
-<description>The interval between garbage collections</description>
-<syntax>CacheGcInterval <em>hours</em></syntax>
-<contextlist><context>server config</context></contextlist>
+<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>
-
-<example>
- CacheGcInterval 24 <br />
-</example>
-<note type="warning">
-The <directive>CacheGcInterval</directive> directive is currently <em>not</em> implemented.
-</note>
+ <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 <em>levels</em></syntax>
+<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></contextlist>
+<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 <directive>CacheRoot</directive></p>
+ subdirectory levels in the cache. Cached data will be saved this many
+ directory levels below the <directive>CacheRoot</directive> directory.</p>
-<note>
- <p>CacheDirLevels*CacheDirLength value must not be higher than 20.</p>
-</note>
-<example>
- CacheDirLevels 5 <br />
-</example>
+ <note>
+ <p>The result of <directive>CacheDirLevels</directive>*
+ <directive>CacheDirLength</directive> 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>
+<syntax>CacheDirLength <var>length</var></syntax>
<default>CacheDirLength 2</default>
-<contextlist><context>server config</context></contextlist>
+<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 in the cache</p>
+ characters for each subdirectory name in the cache hierarchy.</p>
-<note>
- <p>CacheDirLevels*CacheDirLength value must not be higher than 20.</p>
-</note>
-<example>
- CacheDirLength 4 <br />
-</example>
+ <note>
+ <p>The result of <directive>CacheDirLevels</directive>*
+ <directive>CacheDirLength</directive> 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>
+<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 On<br />
-</example>
-<note type="warning">
-The <directive>CacheExpiryCheck</directive> directive is currently <em>not</em> implemented.
-</note>
+ <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 file to be placed in the cache</description>
-<syntax>CacheMinFileSize <em>bytes</em></syntax>
+<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></contextlist>
+<contextlist><context>server config</context><context>virtual host</context>
+</contextlist>
<usage>
<p>The <directive>CacheMinFileSize</directive> directive sets the minimum
- size in bytes of a file to be cached.</p>
+ size, in bytes, for a document to be considered for storage in the cache.</p>
-<example>
- CacheMinFileSize 64<br />
-</example>
+ <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>
+<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></contextlist>
+<contextlist><context>server config</context><context>virtual host</context>
+</contextlist>
<usage>
<p>The <directive>CacheMaxFileSize</directive> directive sets the maximum
- size in bytes of a file to be cached.</p>
+ size, in bytes, for a document to be considered for storage in the cache.</p>
-<example>
- CacheMaxFileSize 64000<br />
-</example>
+ <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>
+<syntax>CacheTimeMargin <var>?</var></syntax>
<default>CacheTimeMargin ?</default>
-<contextlist><context>server config</context></contextlist>
+<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<br />
-</example>
+ <example>
+ CacheTimeMargin X<br />
+ </example>
+
+ <note type="warning">
+ The <directive>CacheTimeMargin</directive> directive is currently
+ <em>not</em> implemented.
+ </note>
</usage>
</directivesynopsis>
<directivesynopsis>
<name>CacheGcDaily</name>
-<description>The time of day for garbage collection (24 hour clock)</description>
-<syntax>CacheGcDaily <em>time</em></syntax>
+<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></contextlist>
+<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<br />
-</example>
-<note type="warning">
-The <directive>CacheGcDaily</directive> directive is currently <em>not</em> implemented.
-</note>
+ <example>
+ CacheGcDaily 23:59<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>
+<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></contextlist>
+<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<br />
-</example>
-<note type="warning">
-The <directive>CacheGcUnused</directive> directive is currently <em>not</em> implemented.
-</note>
+ <example>
+ CacheGcUnused 12 /local_images<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>
+<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></contextlist>
+<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<br />
-</example>
-<note type="warning">
-The <directive>CacheGcClean</directive> directive is currently <em>not</em> implemented.
-</note>
+ <example>
+ CacheGcClean 12 /daily_scripts<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>
+<syntax>CacheGcMemUsage <var>KBytes</var></syntax>
<default>CacheGcMemUsage ?</default>
-<contextlist><context>server config</context></contextlist>
+<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<br />
-</example>
-<note type="warning">
-The <directive>CacheGcMemUsage</directive> directive is currently <em>not</em> implemented.
-</note>
+ <example>
+ CacheGcMemUsage 16<br />
+ </example>
+
+ <note type="warning">
+ The <directive>CacheGcMemUsage</directive> directive is currently
+ <em>not</em> implemented.
+ </note>
</usage>
</directivesynopsis>
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