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<title>mod_lbmethod_heartbeat - Apache HTTP Server</title>
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<p class="apache">Apache HTTP Server Version 2.5</p>
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<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 2.5</a> > <a href="./">Modules</a></div>
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<div id="preamble"><h1>Apache Module mod_lbmethod_heartbeat</h1>
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<p><span>Available Languages: </span><a href="/en/mod/mod_lbmethod_heartbeat.html" title="English"> en </a></p>
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<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>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>lbmethod_heartbeat_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_lbmethod_heartbeat.c</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3 and later</td></tr></table>
<h3>Summary</h3>
<p>lbmethod=heartbeat 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
heartbeat info via the <code class="module"><a href="/mod/mod_heartbeat module.html">mod_heartbeat module</a></code>.</p>
<p> This modules load balancing algorithm favors servers with more ready (idle)
capacity over time, but does not select the server with the most ready capacity
every time. Servers that have 0 active clients are penalized, with the
assumption that they are not fully initialized.</p>
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<div id="quickview"><h3 class="directives">Directives</h3>
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<h3>See also</h3>
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<div class="directive-section"><h2><a name="HeartbeatStorage" id="HeartbeatStorage">HeartbeatStorage</a> <a name="heartbeatstorage" id="heartbeatstorage">Directive</a></h2>
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Path to read heartbeat data</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>HeartbeatStorage <var>file-path</var></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>HeartbeatStorage logs/hb.dat</code></td></tr>
</table>
<p>The <code class="directive">HeartbeatStorage</code> directive specifies the
path to read heartbeat data. This flat-file is used only when
<code class="module"><a href="/mod/mod_slotmem_shm.html">mod_slotmem_shm</a></code> is not loaded.</p>
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