Docs ModCache » History » Revision 5
Revision 4 (moo, 2007-07-07 15:29) → Revision 5/32 (moo, 2007-07-07 15:30)
[[TracNav(DocsToc)]] [[TracNav(DocsToc))]] {{{ #!rst ====================== Web Accelerating Cache ====================== ----------------- Module: mod_cache ----------------- .. meta:: :keywords: lighttpd, cache, squid .. contents:: Table of Contents Description =========== mod_cache is a web accelerating plugin for lighttpd, which works like Squid with similar configuration. mod_cache have several advantages over squid: * Simple: mod_cache sets proper flags between lighttpd request handling stages. request is handled by mod_staticfile or mod_proxy or other modules. * Robust: mod_cache store caches as plain files instead memory, which makes mod_cache away from memory leaks/exhaustion. * Faster: various powerful backends from sendfile, writev to aio are provided by lighttpd * Powerful: mod_cache cooperates with other lighttpd plugins(except mod_deflate) very well Installation ============ This module is a 3rd party module, is not included in the official distribution. You need to download it from here: * For lighttpd 1.4.13: [http://www.linux.com.cn/modcache/lighttpd-1.4.13.mod_cache.v1.2.patch] * For lighttpd 1.5.0.r1605: [http://www.linux.com.cn/modcache/lighttpd-1.5.0.r1605.modcache.v.1.3.2.patch] PCRE library is needed to build mod_cache! Options ======= See [http://www.linux.com.cn/modcache/] cache.bases directory arrays which want to save cache files. e.g.: :: cache.bases=("/data/cache", "/data2/cache") Default: not set cache.enable enable or disable mod_cache. e.g.: :: cache.enable = "disable" $HTTP["host"] == "video.example.org" { cache.enable = "enable" } Default: enable cache.domains domain pcre regex arrays which mod_cache will cache. e.g.: :: cache.domains = ("mydomain.com$") Default: not set (means to cache every domains). cache.support-queries ignore '?' in request url or not. e.g.: :: cache.support-queries = "enable" # mod_cache treats "/uri?q1" or "/uri?q2" as "/uri". Default: disable. cache.debug writes mod_cache debuging messages to error.log or not Default: disable. cache.purge-host pcre regex hosts ip which are allowed to PURGE cache file e.g.: :: cache.purge-host = "^(192\.168\.|222\.120\.35\.)" # Allow PURGE from 192.168/16 and 222.120.35/24, plus hardcoded 10/8 and 127.0.0.1 Default: not set (10/8 and 127.0.0.1 are hardcoded to ip lists which allow to PURGE) cache.ignore-hostname don't include hostname in cache saving filename Default: disable. cache.refresh-pattern arrays of "url_pcre_regex" => "minutes options". Zero minute means cache forever. multi options are allowed. refresh-pattern options are: * ignore-reload: do not update cache when browser sends 'Cache-Control: no-cache' header. * update-on-refresh: update cache when browser sends 'Cache-Control: no-cache' header. * override-expire: ignore backend's 'Expire' header while determining whether to cache. * ignore-cache-control-header: ignore backend's 'Cache-Control' headers while determining whether to cache. * no-expire-header: do not set expires header on matched uri. without this options mod_cache set expire header based refresh-pattern rule. * fetchall-for-range-request: download all content of file if browser sends 'Range: xxx-yyybytes' header. it is useful for multi-thread downloaders(such as flashget). * nocache: do not cache matched url. Examples ======== example for lighttpd 1.4.x series e.g.: :: cache.support-queries = "enable" #ignore '?' in url cache.bases = ("/data/cache") # write cached files in /data/cache directory cache.refresh-pattern = ( "/$" => "5 update-on-refresh no-expire-header", # update homepage every 5 minutes and on refresh requests without setting expire headers "\.(?i)(js|css|xml)$" => "240", # update js/css/xml every 4 hours and on refresh requests "\.(?i)(htm|html|shtml)$" => "30", # update html/htm/shtml every 30 minutes and on refresh requests "\.(?i)(jpg|bmp|jpeg|gif|png)$" => "2880", # update graphics files every 2 days "\.(?i)(rar|zip|wmv|avi|mp3|ape|rm|mpeg|mpg|wma|asf|rmvb|flv)$" => "0 fetchall-for-range-request", # cache media file forever "." => "30 update-on-refresh" # default to update every 30 minutes and on refresh requests ) #mod_proxy setting, config your backend servers here proxy.server = ( "/" => ( ( "host" => "x.x.x.x", "port" => 80 ) # real backend http server ip and port ) ) #it's important to enable proxy.worked-with-modcache, otherwise mod_proxy will not cooperate with mod-cache proxy.worked-with-mod-cache = "enable" example for lighttpd 1.5.0 e.g.: :: cache.support-queries = "enable" #ignore '?' in url cache.bases = ("/data/cache") #write cached files in /data/cache directory cache.refresh-pattern = ( "/$" => "5 update-on-refresh no-expire-header", # update homepage every 5 minutes and on refresh requests without setting expire headers "\.(?i)(js|css|xml)$" => "240", # update js/css/xml every 4 hours and on refresh requests "\.(?i)(htm|html|shtml)$" => "30", # update html/htm/shtml every 30 minutes and on refresh requests "\.(?i)(jpg|bmp|jpeg|gif|png)$" => "2880", # update graphics files every 2 days "\.(?i)(rar|zip|wmv|avi|mp3|ape|rm|mpeg|mpg|wma|asf|rmvb|flv)$" => "0 fetchall-for-range-request", # cache media file forever "." => "30 update-on-refresh" # default to update every 30 minutes and on refresh requests ) #mod_proxy_core setting, config your backend servers here proxy-core.backends = ( "x.x.x.x:80", "y.y.y.y:80") proxy-core.balancer = "round-robin" # or "sqf" or "carp" proxy-core.protocol = "http" #it's important to enable proxy-core.worked-with-modcache, otherwise mod_proxy_core will not cooperate with mod-cache proxy-core.worked-with-modcache = "enable" }}}