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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:01:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:01:30 +0000 |
| commit | 6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch) | |
| tree | 1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/socache.html.en | |
| parent | Initial commit. (diff) | |
| download | apache2-upstream/2.4.57.tar.xz apache2-upstream/2.4.57.zip | |
Adding upstream version 2.4.57.upstream/2.4.57
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'docs/manual/socache.html.en')
| -rw-r--r-- | docs/manual/socache.html.en | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/docs/manual/socache.html.en b/docs/manual/socache.html.en new file mode 100644 index 0000000..f910064 --- /dev/null +++ b/docs/manual/socache.html.en @@ -0,0 +1,148 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> +<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> +<!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>Shared Object Cache in Apache HTTP Server - Apache HTTP Server Version 2.4</title> +<link href="./style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> +<link href="./style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> +<link href="./style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="./style/css/prettify.css" /> +<script src="./style/scripts/prettify.min.js" type="text/javascript"> +</script> + +<link href="./images/favicon.ico" rel="shortcut icon" /></head> +<body id="manual-page" class="no-sidebar"><div id="page-header"> +<p class="menu"><a href="./mod/">Modules</a> | <a href="./mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p> +<p class="apache">Apache HTTP Server Version 2.4</p> +<img alt="" src="./images/feather.png" /></div> +<div class="up"><a href="./"><img title="<-" alt="<-" src="./images/left.gif" /></a></div> +<div id="path"> +<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="./">Version 2.4</a></div><div id="page-content"><div id="preamble"><h1>Shared Object Cache in Apache HTTP Server</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="./en/socache.html" title="English"> en </a> | +<a href="./fr/socache.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div> + + <p>The Shared Object Cache provides a means to share simple data + across all a server's workers, regardless of <a href="mpm.html">thread + and process models</a>. It is used where the advantages of sharing + data across processes outweigh the performance overhead of + inter-process communication.</p> + </div> +<div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> +<div class="section"> +<h2><a name="providers" id="providers">Shared Object Cache Providers</a></h2> + + <p>The shared object cache as such is an abstraction. Five different + modules implement it. To use the cache, one or more of these modules + must be present, and configured.</p> + <p>The only configuration required is to select which cache provider + to use. This is the responsibility of modules using the cache, and + they enable selection using directives such as + <code class="directive"><a href="./mod/mod_cache_socache.html#cachesocache">CacheSocache</a></code>, + <code class="directive"><a href="./mod/mod_authn_socache.html#authncachesocache">AuthnCacheSOCache</a></code>, + <code class="directive"><a href="./mod/mod_ssl.html#sslsessioncache">SSLSessionCache</a></code>, and + <code class="directive"><a href="./mod/mod_ssl.html#sslstaplingcache">SSLStaplingCache</a></code>.</p> + <p>Currently available providers are:</p> + <dl> + <dt>"dbm" (<code class="module"><a href="./mod/mod_socache_dbm.html">mod_socache_dbm</a></code>)</dt> + <dd>This makes use of a DBM hash file. + The choice of underlying DBM used may be configurable + if the installed APR version supports multiple DBM implementations.</dd> + <dt>"dc" (<code class="module"><a href="./mod/mod_socache_dc.html">mod_socache_dc</a></code>)</dt> + <dd>This makes use of the <a href="http://distcache.sourceforge.net/">distcache</a> + distributed session caching libraries.</dd> + <dt>"memcache" (<code class="module"><a href="./mod/mod_socache_memcache.html">mod_socache_memcache</a></code>)</dt> + <dd>This makes use of the <a href="http://memcached.org/">memcached</a> + high-performance, distributed memory object caching system.</dd> + <dt>"redis" (<code class="module"><a href="./mod/mod_socache_redis.html">mod_socache_redis</a></code>)</dt> + <dd>This makes use of the <a href="http://redis.io/">Redis</a> + high-performance, distributed memory object caching system.</dd> + <dt>"shmcb" (<code class="module"><a href="./mod/mod_socache_shmcb.html">mod_socache_shmcb</a></code>)</dt> + <dd>This makes use of a high-performance cyclic buffer inside a + shared memory segment.</dd> + </dl> + + <p>The API provides the following functions:</p> + + <dl> + <dt>const char *create(ap_socache_instance_t **instance, const char *arg, + apr_pool_t *tmp, apr_pool_t *p);</dt> + <dd>Create a session cache based on the given configuration string. + The instance pointer returned in the instance parameter will be + passed as the first argument to subsequent invocations.</dd> + + <dt>apr_status_t init(ap_socache_instance_t *instance, const char *cname, + const struct ap_socache_hints *hints, + server_rec *s, apr_pool_t *pool)</dt> + <dd>Initialize the cache. The cname must be of maximum length 16 + characters, and uniquely identifies the consumer of the cache + within the server; using the module name is recommended, e.g. + "mod_ssl-sess". This string may be used within a filesystem + path so use of only alphanumeric [a-z0-9_-] characters is + recommended. If hints is non-NULL, it gives a set of hints for + the provider. Return APR error code.</dd> + + <dt>void destroy(ap_socache_instance_t *instance, server_rec *s)</dt> + <dd>Destroy a given cache instance object.</dd> + + <dt>apr_status_t store(ap_socache_instance_t *instance, server_rec *s, + const unsigned char *id, unsigned int idlen, + apr_time_t expiry, + unsigned char *data, unsigned int datalen, + apr_pool_t *pool)</dt> + <dd>Store an object in a cache instance.</dd> + + <dt>apr_status_t retrieve(ap_socache_instance_t *instance, server_rec *s, + const unsigned char *id, unsigned int idlen, + unsigned char *data, unsigned int *datalen, + apr_pool_t *pool)</dt> + <dd>Retrieve a cached object.</dd> + + <dt>apr_status_t remove(ap_socache_instance_t *instance, server_rec *s, + const unsigned char *id, unsigned int idlen, + apr_pool_t *pool)</dt> + <dd>Remove an object from the cache.</dd> + + <dt>void status(ap_socache_instance_t *instance, request_rec *r, int flags)</dt> + <dd>Dump the status of a cache instance for mod_status.</dd> + + <dt>apr_status_t iterate(ap_socache_instance_t *instance, server_rec *s, + void *userctx, ap_socache_iterator_t *iterator, + apr_pool_t *pool)</dt> + <dd>Dump all cached objects through an iterator callback.</dd> + </dl> + + </div></div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="./en/socache.html" title="English"> en </a> | +<a href="./fr/socache.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div><div class="top"><a href="#page-header"><img src="./images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/socache.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> +<p class="apache">Copyright 2023 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> +<p class="menu"><a href="./mod/">Modules</a> | <a href="./mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> +</body></html>
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