![[APACHE DOCUMENTATION]](../images/sub.gif)
Apache HTTP Server Version 2.0
Apache Module mod_cache
Summary
|
This module is experimental. Documentation is still under development...
|
mod_cache implements an RFC 2616 compliant HTTP content
cache that can be used to cache either local or proxied content.
mod_cache requires the services of one or more storage
management modules. Two storage management modules are included in
the base Apache distribution:
mod_disk_cache- implements a disk based storage manager for use with
mod_proxy
mod_mem_cache- implements an in-memory based storage manager. mod_mem_cache
can be configured to operate in two modes: caching open file
descriptors or caching objects in heap storage.
mod_mem_cache
is most useful when used to cache locally generated content or to cache
backend server content for mod_proxy configured for ProxyPass (aka reverse proxy)
Content stored and retrived keyed to the URL. Content with
access protections is not cached.
Directives
Sample Configuration
Sample httpd.conf
#
# Sample Cache Configuration
#
LoadModule cache_module modules/mod_cache.so
<IfModule mod_cache.c>
#LoadModule disk_cache_module modules/mod_disk_cache.so
<IfModule mod_disk_cache.c>
CacheRoot c:/cacheroot
CacheSize 256
CacheEnable disk /
CacheDirLevels 5
CacheDirLength 3
</IfModule>
LoadModule mem_cache_module modules/mod_mem_cache.so
<IfModule mod_mem_cache.c>
MCacheEnable mem /
MCacheSize 4096
MCacheMaxObjectCount 100
MCacheMinObjectSize 1
MCacheMaxObjectSize 2048
</IfModule>
</IfModule>
|
The default time in seconds to cache a document if the page does not have
an expiry date in the Expires field.
| Description:
| Disable caching of specified URLs by specified storage manager | | Syntax:
| CacheDisable cache_type url-string | | Context:
| server config | | Status:
| Experimental | | Module:
| mod_cache |
|
The CacheDisable directive instructs
mod_cache to not cache urls at or above url-string.
Example
CacheDisable disk /local_files
|
| Description:
| Enable caching specified URLs in a specified storage manager | | Syntax:
| CacheEnable cache_type url-string | | Context:
| server config | | Status:
| Experimental | | Module:
| mod_cache |
|
The CacheEnable directive instructs
mod_cache to cache urls at or below url-string.
The cache store is specified with the cache_type argument.
cache_type mem instructs mod_cache to use the
in-memory cache storage manager implemented by mod_mem_cache.
cache_type disk instructs mod_cache to use the
cache storage manager implemented by mod_disk_cache .
CacheEnable disk /
CacheEnable mem /manual
CacheEnable fd /images
|
| Description:
| Percentage of download to arrive for the cache to force complete transfert | | Syntax:
| CacheLastModifiedFactor Percentage | | Default:
| CacheLastModifiedFactor 60 | | Context:
| server config | | Status:
| Experimental | | Module:
| mod_cache |
|
Percentage of download to arrive for the cache to force complete transfert.
|
This feature is currently not implemented.
|
| Description:
| Percentage of download to arrive for the cache to force complete transfert | | Syntax:
| CacheLastModifiedFactor Percentage | | Default:
| CacheLastModifiedFactor 60 | | Context:
| server config | | Status:
| Experimental | | Module:
| mod_cache |
|
Percentage of download to arrive for the cache to force complete transfert.
|
This feature is currently not implemented.
|
| Description:
| Ignore requests from the client for uncached content | | Syntax:
| CacheIgnoreCacheControl | | Context:
| server config | | Status:
| Experimental | | Module:
| mod_cache |
|
Ignore requests from the client for uncached content
| Description:
| Ignore responses where there is no Last Modified Header | | Syntax:
| CacheIgnoreNoLastMod | | Context:
| server config | | Status:
| Experimental | | Module:
| mod_cache |
|
Ignore responses where there is no Last Modified Header
| Description:
| The factor used to estimate the Expires date from the LastModified date | | Syntax:
| CacheLastModifiedFactor float | | Default:
| CacheLastModifiedFactor 0.1 | | Context:
| server config | | Status:
| Experimental | | Module:
| mod_cache |
|
The factor used to estimate the Expires date from the LastModified date.
| Description:
| The maximum time in seconds to cache a document | | Syntax:
| CacheMaxExpire seconds | | Default:
| CacheMaxExpire 86400 (one day) | | Context:
| server config | | Status:
| Experimental | | Module:
| mod_cache |
|
The maximum time in seconds to cache a document. The CacheMaxExpire
takes precedence over the Expire field from the header.
