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| author |   hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
|---|---|---|
| committer | hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
| commit | c0b7206652b2852bc574694e7ba07ba1c2acdc00 (patch) | |
| tree | 5cb95cb0e19e03610525903df46279df2c3b7eb1 /rubbos/app/httpd-2.0.64/docs/manual/mod/perchild.html.en | |
| parent | b6d3d6e668b793220f2d3af1bc3e828553dc3fe6 (diff) | |
delete app
Change-Id: Id4c572809969ebe89e946e88063eaed262cff3f2
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/httpd-2.0.64/docs/manual/mod/perchild.html.en')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/docs/manual/mod/perchild.html.en | 266 |
1 files changed, 0 insertions, 266 deletions
diff --git a/rubbos/app/httpd-2.0.64/docs/manual/mod/perchild.html.en b/rubbos/app/httpd-2.0.64/docs/manual/mod/perchild.html.en deleted file mode 100644 index 3d557add..00000000 --- a/rubbos/app/httpd-2.0.64/docs/manual/mod/perchild.html.en +++ /dev/null @@ -1,266 +0,0 @@ -<?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>perchild - 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> -<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="<-" 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 2.0</a> > <a href="./">Modules</a></div> -<div id="page-content"> -<div id="preamble"><h1>Apache MPM perchild</h1> -<div class="toplang"> -<p><span>Available Languages: </span><a href="../en/mod/perchild.html" title="English"> en </a></p> -</div> -<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Multi-Processing Module allowing for daemon processes serving -requests to be assigned a variety of different userids</td></tr> -<tr><th><a href="module-dict.html#Status">Status:</a></th><td>MPM</td></tr> -<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>mpm_perchild_module</td></tr> -<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>perchild.c</td></tr></table> -<h3>Summary</h3> - - <div class="warning"> - This module is not functional. Development of this module is not - complete and is not currently active. Do not use - <code class="module"><a href="../mod/perchild.html">perchild</a></code> unless you are a programmer willing to - help fix it. - </div> - - <p>This Multi-Processing Module (MPM) implements a hybrid - multi-process, multi-threaded web server. A fixed number of - processes create threads to handle requests. Fluctuations in - load are handled by increasing or decreasing the number of - threads in each process.</p> -</div> -<div id="quickview"><h3 class="directives">Directives</h3> -<ul id="toc"> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#acceptmutex">AcceptMutex</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#assignuserid">AssignUserID</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#bs2000account">BS2000Account</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#childperuserid">ChildPerUserID</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#coredumpdirectory">CoreDumpDirectory</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#enableexceptionhook">EnableExceptionHook</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#group">Group</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#listen">Listen</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#listenbacklog">ListenBacklog</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#lockfile">LockFile</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#maxrequestsperchild">MaxRequestsPerChild</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#maxsparethreads">MaxSpareThreads</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#maxthreadsperchild">MaxThreadsPerChild</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#minsparethreads">MinSpareThreads</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#numservers">NumServers</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#pidfile">PidFile</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#receivebuffersize">ReceiveBufferSize</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#scoreboardfile">ScoreBoardFile</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#sendbuffersize">SendBufferSize</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#serverlimit">ServerLimit</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#startthreads">StartThreads</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#threadlimit">ThreadLimit</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#user">User</a></li> -</ul> -<h3>Topics</h3> -<ul id="topics"> -<li><img alt="" src="../images/down.gif" /> <a href="#how-it-works">How it works</a></li> -</ul><h3>See also</h3> -<ul class="seealso"> -<li><a href="../bind.html">Setting which addresses and ports Apache -uses</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="how-it-works" id="how-it-works">How it works</a></h2> - <p>A single control process launches the number of child processes - indicated by the <code class="directive"><a href="#numservers">NumServers</a></code> - directive at server startup. Each child process creates threads as - specified in the <code class="directive"><a href="../mod/mpm_common.html#startthreads">StartThreads</a></code> directive. - The individual threads then - listen for connections and serve them when they arrive.</p> - - <p>Apache always tries to maintain a pool of <dfn>spare</dfn> or - idle server threads, which stand ready to serve incoming - requests. In this way, clients do not need to wait for new - threads to be created. For each child process, Apache assesses - the number of idle threads and creates or destroys threads to - keep this number within the boundaries specified by - <code class="directive"><a href="../mod/mpm_common.html#minsparethreads">MinSpareThreads</a></code> - and <code class="directive"><a href="../mod/mpm_common.html#maxsparethreads">MaxSpareThreads</a></code>. - Since this process is very self-regulating, it is rarely - necessary to modify these directives from their default values. - The maximum number of clients that may be served simultaneously - is determined by multiplying the number of server processes - that will be created (<code class="directive"><a href="#numservers">NumServers</a></code>) by the maximum - number of threads created in each process - (<code class="directive"><a href="../mod/mpm_common.html#maxthreadsperchild">MaxThreadsPerChild</a></code>).</p> - - <p>While the parent process is usually started as root under - Unix in order to bind to port 80, the child processes and - threads are launched by Apache as a less-privileged user. The - <code class="directive"><a href="../mod/mpm_common.html#user">User</a></code> and <code class="directive"><a href="../mod/mpm_common.html#group">Group</a></code> directives are used to - set the privileges of the Apache child processes. The child - processes must be able to read all the content that will be - served, but should have as few privileges beyond that as - possible. In addition, unless <code class="program"><a href="../programs/suexec.html">suexec</a></code> is used, - these directives also set the privileges which will be inherited - by CGI scripts.</p> - - <p><code class="directive"><a href="../mod/mpm_common.html#maxrequestsperchild">MaxRequestsPerChild</a></code> - controls how frequently the - server recycles processes by killing old ones and launching new - ones.</p> - - <h3><a name="user-ids" id="user-ids">Working with different user-IDs</a></h3> - <p>The <code class="module"><a href="../mod/perchild.html">perchild</a></code> MPM adds the extra ability to - specify that particular processes should serve requests under - different user-IDs. These user-IDs can then be associated with - specific virtual hosts. You have to use one <code class="directive"><a href="#childperuserid">ChildPerUserID</a></code> directive for - every user/group combination you want to be run. Then you can tie - particular virtual hosts to that user and group IDs.</p> - - <p>The following example runs 7 child processes. Two of them are run - under <code>user1</code>/<code>group1</code>. The next four are run - under <code>user2</code>/<code>group2</code> and the remaining - process uses the <code class="directive"><a href="../mod/mpm_common.html#user">User</a></code> and <code class="directive"><a href="../mod/mpm_common.html#group">Group</a></code> - of the main server:</p> - - <div class="example"><h3>Global config</h3><p><code> - NumServers 7<br /> - ChildPerUserID user1 group1 2<br /> - ChildPerUserID user2 group2 4 - </code></p></div> - - <p>Using unbalanced numbers of processes as above is useful, if the - particular virtual hosts produce different load. The assignment to - the virtual hosts is easily done as in the example below. In - conclusion with the example above the following assumes, that - <code>server2</code> has to serve about twice of the hits of - <code>server1</code>.</p> - - <div class="example"><h3>Example</h3><p><code> - NameVirtualHost *<br /> - <br /> - <VirtualHost *><br /> - <span class="indent"> - ServerName fallbackhost<br /> - # no assignment; use fallback<br /> - </span> - </VirtualHost><br /> - <br /> - <VirtualHost *><br /> - <span class="indent"> - ServerName server1<br /> - AssignUserID user1 group1<br /> - </span> - </VirtualHost><br /> - <br /> - <VirtualHost *><br /> - <span class="indent"> - ServerName server2<br /> - AssignUserID user2 group2<br /> - </span> - </VirtualHost> - </code></p></div> - -</div> -<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="directive-section"><h2><a name="AssignUserID" id="AssignUserID">AssignUserID</a> <a name="assignuserid" id="assignuserid">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Tie a virtual host to a user and group ID</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AssignUserID <var>user-id</var> <var>group-id</var></code></td></tr> -<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>virtual host</td></tr> -<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>MPM</td></tr> -<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>perchild</td></tr> -</table> - <p>Tie a virtual host to a specific user/group combination. Requests - addressed to the virtual host where this directive appears will be - served by a process running with the specified user and group ID.</p> - - <p>The user and group ID has to be assigned to a number of children - in the global server config using the <code class="directive"><a href="#childperuserid">ChildPerUserID</a></code> directive. See the section above for a - <a href="#user-ids">configuration example</a>.</p> - -</div> -<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="directive-section"><h2><a name="ChildPerUserID" id="ChildPerUserID">ChildPerUserID</a> <a name="childperuserid" id="childperuserid">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specify user ID and group ID for a number of child -processes</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ChildPerUserID <var>user-id</var> <var>group-id</var> -<var>num-children</var></code></td></tr> -<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> -<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>MPM</td></tr> -<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>perchild</td></tr> -</table> - <p>Specify a user ID and group ID for a number of child processes. - The third argument, <var>num-children</var>, is the number of child - processes to start with the specified user and group. It does - <em>not</em> represent a specific child number. In order to use this - directive, the server must be run initially as <code>root</code>. - If you start the server as a non-root user, it will fail to change - to the lesser privileged user.</p> - - <p>If the total number of child processes, found by totaling all of the - third arguments to all <code class="directive">ChildPerUserID</code> directives - in the config file, is less than <code class="directive"><a href="#numservers">NumServers</a></code>, then all remaining children will inherit the - <code class="directive"><a href="../mod/mpm_common.html#user">User</a></code> and <code class="directive"><a href="../mod/mpm_common.html#group">Group</a></code> settings from the main server. - See the section above for a <a href="#user-ids">configuration - example</a>.</p> - - <div class="warning"><h3>Security</h3> - <p>Don't set <var>user-id</var> (or <var>group-id</var>) to - <code>root</code> unless you know exactly what you are doing, and - what the dangers are.</p> - </div> - -</div> -<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="directive-section"><h2><a name="MaxThreadsPerChild" id="MaxThreadsPerChild">MaxThreadsPerChild</a> <a name="maxthreadsperchild" id="maxthreadsperchild">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maximum number of threads per child process</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MaxThreadsPerChild <var>number</var></code></td></tr> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MaxThreadsPerChild 64</code></td></tr> -<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> -<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>MPM</td></tr> -<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>perchild</td></tr> -</table> - <p>This directive sets the maximum number of threads that will be - created in each child process. To increase this value beyond its - default, it is necessary to change the value of the <code class="directive"><a href="../mod/mpm_common.html#threadlimit">ThreadLimit</a></code> directive and stop and - re-start the server.</p> - -</div> -<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="directive-section"><h2><a name="NumServers" id="NumServers">NumServers</a> <a name="numservers" id="numservers">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Total number of children alive at the same time</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>NumServers <var>number</var></code></td></tr> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>NumServers 2</code></td></tr> -<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> -<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>MPM</td></tr> -<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>perchild</td></tr> -</table> - <p>The <code class="directive">NumServers</code> directive determines the number - of children alive at the same time. This number should be large enough to - handle the requests for the entire site. To increase this value beyond the - value of <code>8</code>, it is necessary to change the value of the - <code class="directive"><a href="../mod/mpm_common.html#serverlimit">ServerLimit</a></code> directive and stop - and re-start the server. See the section above for a <a href="#user-ids">configuration example</a>.</p> - -</div> -</div> -<div class="bottomlang"> -<p><span>Available Languages: </span><a href="../en/mod/perchild.html" title="English"> en </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>
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