1<?xml version="1.0" encoding="UTF-8"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> 4<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> 5<!-- 6 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 7 This file is generated from xml source: DO NOT EDIT 8 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 9 --> 10<title>mod_lbmethod_heartbeat - Apache HTTP Server Version 2.4</title> 11<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> 12<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> 13<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" /> 14<script src="../style/scripts/prettify.min.js" type="text/javascript"> 15</script> 16 17<link href="../images/favicon.ico" rel="shortcut icon" /></head> 18<body> 19<div id="page-header"> 20<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> 21<p class="apache">Apache HTTP Server Version 2.4</p> 22<img alt="" src="../images/feather.png" /></div> 23<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> 24<div id="path"> 25<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> > <a href="./">Modules</a></div> 26<div id="page-content"> 27<div id="preamble"><h1>Apache Module mod_lbmethod_heartbeat</h1> 28<div class="toplang"> 29<p><span>Available Languages: </span><a href="../en/mod/mod_lbmethod_heartbeat.html" title="English"> en </a> | 30<a href="../fr/mod/mod_lbmethod_heartbeat.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> 31</div> 32<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Heartbeat Traffic Counting load balancer scheduler algorithm for <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code></td></tr> 33<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr> 34<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>lbmethod_heartbeat_module</td></tr> 35<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_lbmethod_heartbeat.c</td></tr> 36<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3 and later</td></tr></table> 37<h3>Summary</h3> 38 39<p><code>lbmethod=heartbeat</code> uses the services of <code class="module"><a href="../mod/mod_heartmonitor.html">mod_heartmonitor</a></code> to balance between origin servers that are providing 40heartbeat info via the <code class="module"><a href="../mod/mod_heartbeat.html">mod_heartbeat</a></code> module.</p> 41 42<p> This modules load balancing algorithm favors servers with more ready (idle) 43capacity over time, but does not select the server with the most ready capacity 44every time. Servers that have 0 active clients are penalized, with the 45assumption that they are not fully initialized.</p> 46</div> 47<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3 class="directives">Directives</h3> 48<ul id="toc"> 49<li><img alt="" src="../images/down.gif" /> <a href="#heartbeatstorage">HeartbeatStorage</a></li> 50</ul> 51<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_lbmethod_heartbeat">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_lbmethod_heartbeat">Report a bug</a></li></ul><h3>See also</h3> 52<ul class="seealso"> 53<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li> 54<li><code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code></li> 55<li><code class="module"><a href="../mod/mod_heartbeat.html">mod_heartbeat</a></code></li> 56<li><code class="module"><a href="../mod/mod_heartmonitor.html">mod_heartmonitor</a></code></li> 57<li><a href="#comments_section">Comments</a></li></ul></div> 58 59<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> 60<div class="directive-section"><h2><a name="HeartbeatStorage" id="HeartbeatStorage">HeartbeatStorage</a> <a name="heartbeatstorage" id="heartbeatstorage">Directive</a></h2> 61<table class="directive"> 62<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Path to read heartbeat data</td></tr> 63<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>HeartbeatStorage <var>file-path</var></code></td></tr> 64<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>HeartbeatStorage logs/hb.dat</code></td></tr> 65<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> 66<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> 67<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lbmethod_heartbeat</td></tr> 68</table> 69 <p>The <code class="directive">HeartbeatStorage</code> directive specifies the 70 path to read heartbeat data. This flat-file is used only when 71 <code class="module"><a href="../mod/mod_slotmem_shm.html">mod_slotmem_shm</a></code> is not loaded.</p> 72 73</div> 74</div> 75<div class="bottomlang"> 76<p><span>Available Languages: </span><a href="../en/mod/mod_lbmethod_heartbeat.html" title="English"> en </a> | 77<a href="../fr/mod/mod_lbmethod_heartbeat.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> 78</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. 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