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authorhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:35:09 -0500
committerhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:36:35 -0500
commitcc40af334e619bb549038238507407866f774f8f (patch)
tree43ddc1974f72997a57173151eafb23e6025a13c9 /rubbos/app/apache2/manual/mpm.html.en
parent68e74fd78b2485e5914ce34a5b30f4485029e021 (diff)
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JIRA: BOTTLENECK-10 Change-Id: I67eae31de6dc824097dfa56ab454ba36fdd23a2c Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
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+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!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><!--
+ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+ This file is generated from xml source: DO NOT EDIT
+ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+ -->
+<title>Multi-Processing Modules (MPMs) - Apache HTTP Server</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 href="./images/favicon.ico" rel="shortcut icon" /></head>
+<body id="manual-page"><div id="page-header">
+<p class="menu"><a href="./mod/">Modules</a> | <a href="./mod/directives.html">Directives</a> | <a href="./faq/">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p>
+<p class="apache">Apache HTTP Server Version 2.0</p>
+<img alt="" src="./images/feather.gif" /></div>
+<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="./images/left.gif" /></a></div>
+<div id="path">
+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="./">Version 2.0</a></div><div id="page-content"><div id="preamble"><h1>Multi-Processing Modules (MPMs)</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="./de/mpm.html" hreflang="de" rel="alternate" title="Deutsch">&nbsp;de&nbsp;</a> |
+<a href="./en/mpm.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="./es/mpm.html" hreflang="es" rel="alternate" title="Español">&nbsp;es&nbsp;</a> |
+<a href="./ja/mpm.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="./ko/mpm.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
+<a href="./ru/mpm.html" hreflang="ru" rel="alternate" title="Russian">&nbsp;ru&nbsp;</a> |
+<a href="./tr/mpm.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</a></p>
+</div>
+
+<p>This document describes what a Multi-Processing Module is and
+how they are used by the Apache HTTP Server.</p>
+</div>
+<div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#introduction">Introduction</a></li>
+<li><img alt="" src="./images/down.gif" /> <a href="#choosing">Choosing an MPM</a></li>
+<li><img alt="" src="./images/down.gif" /> <a href="#defaults">MPM Defaults</a></li>
+</ul></div>
+<div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="introduction" id="introduction">Introduction</a></h2>
+
+ <p>The Apache HTTP Server is designed to be a powerful and
+ flexible web server that can work on a very wide variety of
+ platforms in a range of different environments. Different
+ platforms and different environments often require different
+ features, or may have different ways of implementing the same
+ feature most efficiently. Apache has always accommodated a wide
+ variety of environments through its modular design. This design
+ allows the webmaster to choose which features will be included
+ in the server by selecting which modules to load either at
+ compile-time or at run-time.</p>
+
+ <p>Apache 2.0 extends this modular design to the most basic
+ functions of a web server. The server ships with a selection of
+ Multi-Processing Modules (MPMs) which are responsible for
+ binding to network ports on the machine, accepting requests,
+ and dispatching children to handle the requests.</p>
+
+ <p>Extending the modular design to this level of the server
+ allows two important benefits:</p>
+
+ <ul>
+ <li>Apache can more cleanly and efficiently support a wide
+ variety of operating systems. In particular, the Windows
+ version of Apache is now much more efficient, since
+ <code class="module"><a href="./mod/mpm_winnt.html">mpm_winnt</a></code> can use native
+ networking features in place of the POSIX layer used in
+ Apache 1.3. This benefit also extends to other operating
+ systems that implement specialized MPMs.</li>
+
+ <li>The server can be better customized for the needs of the
+ particular site. For example, sites that need a great deal of
+ scalability can choose to use a threaded MPM like
+ <code class="module"><a href="./mod/worker.html">worker</a></code>, while sites requiring
+ stability or compatibility with older software can use a
+ <code class="module"><a href="./mod/prefork.html">prefork</a></code>. In addition,
+ special features like serving different hosts under different
+ userids (<code class="module"><a href="./mod/perchild.html">perchild</a></code>) can be
+ provided.</li>
+ </ul>
+
+ <p>At the user level, MPMs appear much like other Apache
+ modules. The main difference is that one and only one MPM must
+ be loaded into the server at any time. The list of available
+ MPMs appears on the <a href="mod/">module index page</a>.</p>
+
+</div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="choosing" id="choosing">Choosing an MPM</a></h2>
+
+ <p>MPMs must be chosen during configuration, and compiled into
+ the server. Compilers are capable of optimizing a lot of
+ functions if threads are used, but only if they know that
+ threads are being used.</p>
+
+ <p>To actually choose the desired MPM, use the argument
+ <code>--with-mpm=<em>NAME</em></code> with the
+ <code class="program"><a href="./programs/configure.html">configure</a></code> script. <em>NAME</em> is the name of the
+ desired MPM.</p>
+
+ <p>Once the server has been compiled, it is possible to
+ determine which MPM was chosen by using <code>./httpd
+ -l</code>. This command will list every module that is compiled
+ into the server, including the MPM.</p>
+</div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="defaults" id="defaults">MPM Defaults</a></h2>
+
+<p>The following table lists the default MPMs for various operating
+systems. This will be the MPM selected if you do not make another
+choice at compile-time.</p>
+
+<table>
+
+<tr><td>BeOS</td><td><code class="module"><a href="./mod/beos.html">beos</a></code></td></tr>
+<tr><td>Netware</td><td><code class="module"><a href="./mod/mpm_netware.html">mpm_netware</a></code></td></tr>
+<tr><td>OS/2</td><td><code class="module"><a href="./mod/mpmt_os2.html">mpmt_os2</a></code></td></tr>
+<tr><td>Unix</td><td><code class="module"><a href="./mod/prefork.html">prefork</a></code></td></tr>
+<tr><td>Windows</td><td><code class="module"><a href="./mod/mpm_winnt.html">mpm_winnt</a></code></td></tr>
+</table>
+</div></div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="./de/mpm.html" hreflang="de" rel="alternate" title="Deutsch">&nbsp;de&nbsp;</a> |
+<a href="./en/mpm.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="./es/mpm.html" hreflang="es" rel="alternate" title="Español">&nbsp;es&nbsp;</a> |
+<a href="./ja/mpm.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="./ko/mpm.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
+<a href="./ru/mpm.html" hreflang="ru" rel="alternate" title="Russian">&nbsp;ru&nbsp;</a> |
+<a href="./tr/mpm.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</a></p>
+</div><div id="footer">
+<p class="apache">Copyright 2009 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="./faq/">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p></div>
+</body></html> \ No newline at end of file