<?xml version="1.0"?>

<!DOCTYPE modulesynopsis SYSTEM "/style/modulesynopsis.dtd">

<?xml-stylesheet type="text/xsl" href="/style/manual.en.xsl"?>

<modulesynopsis metafile="leader.xml.meta">

<name>leader</name>

<description>An experimental variant of the standard <module>worker</module>

MPM</description>

<status>MPM</status>

<sourcefile>leader.c</sourcefile>

<identifier>mpm_leader_module</identifier>

<summary>

<note type="warning"><title>Warning</title>

<p>This MPM is experimental, so it may or may not work

as expected.</p>

</note>

<p>This is an experimental variant of the standard

<module>worker</module> MPM. It uses a Leader/Followers design pattern

to coordinate work among threads. For more info, see <a

href="http://deuce.doc.wustl.edu/doc/pspdfs/lf.pdf"

>http://deuce.doc.wustl.edu/doc/pspdfs/lf.pdf</a>.</p>

<p>To use the <module>leader</module> MPM, add

<code>--with-mpm=leader</code> to the configure script's arguments

when building the httpd.</p>

<p>This MPM depends on APR's atomic compare-and-swap operations for

thread synchronization. If you are compiling for an x86 target

and you don't need to support 386s, or you are compiling for a

SPARC and you don't need to run on pre-UltraSPARC chips, add

<code>--enable-nonportable-atomics=yes</code> to the configure

script's arguments. This will cause APR to implement atomic operations

using efficient opcodes not available in older CPUs.</p>

</summary>

<directivesynopsis location="mpm_common"><name>AcceptMutex</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>CoreDumpDirectory</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>Group</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>Listen</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>ListenBacklog</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>SendBufferSize</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>LockFile</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>MaxClients</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>MaxMemFree</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>MaxRequestsPerChild</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>MaxSpareThreads</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>MinSpareThreads</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>PidFile</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>ScoreBoardFile</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>ServerLimit</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>StartServers</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>ThreadLimit</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>ThreadsPerChild</name>

</directivesynopsis>

<directivesynopsis location="mpm_common"><name>User</name>

</directivesynopsis>

</modulesynopsis>