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73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<title>mod_lbmethod_heartbeat - Apache HTTP Server</title>
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3b3b7fc78d1f5bfc2769903375050048ff41ff26nd<div id="preamble"><h1>Apache Module mod_lbmethod_heartbeat</h1>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<p><span>Available Languages: </span><a href="/en/mod/mod_lbmethod_heartbeat.html" title="English"> en </a></p>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<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>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>lbmethod_heartbeat_module</td></tr>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_lbmethod_heartbeat.c</td></tr>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3 and later</td></tr></table>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<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
73ba54c33b4fcad0e13005e10ea8648c9fe4265bndheartbeat info via the <code class="module"><a href="/mod/mod_heartbeat module.html">mod_heartbeat module</a></code>.</p>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<p> This modules load balancing algorithm favors servers with more ready (idle)
73ba54c33b4fcad0e13005e10ea8648c9fe4265bndcapacity over time, but does not select the server with the most ready capacity
73ba54c33b4fcad0e13005e10ea8648c9fe4265bndevery time. Servers that have 0 active clients are penalized, with the
73ba54c33b4fcad0e13005e10ea8648c9fe4265bndassumption that they are not fully initialized.</p>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<div id="quickview"><h3 class="directives">Directives</h3>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<li><img alt="" src="/images/down.gif" /> <a href="#heartbeatstorage">HeartbeatStorage</a></li>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<li><code class="module"><a href="/mod/mod_proxy.html">mod_proxy</a></code></li>
5b10fd3977e6dfff19afe770e612e276962f7950nd<li><code class="module"><a href="/mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code></li>
5b10fd3977e6dfff19afe770e612e276962f7950nd<li><code class="module"><a href="/mod/mod_heartbeat.html">mod_heartbeat</a></code></li>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl<li><code class="module"><a href="/mod/mod_heartmonitor.html">mod_heartmonitor</a></code></li>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<div class="directive-section"><h2><a name="HeartbeatStorage" id="HeartbeatStorage">HeartbeatStorage</a> <a name="heartbeatstorage" id="heartbeatstorage">Directive</a></h2>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Path to read heartbeat data</td></tr>
73ba54c33b4fcad0e13005e10ea8648c9fe4265bnd<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>HeartbeatStorage <var>file-path</var></code></td></tr>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>HeartbeatStorage logs/hb.dat</code></td></tr>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lbmethod_heartbeat</td></tr>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl <p>The <code class="directive">HeartbeatStorage</code> directive specifies the
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl path to read heartbeat data. This flat-file is used only when
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl <code class="module"><a href="/mod/mod_slotmem_shm.html">mod_slotmem_shm</a></code> is not loaded.</p>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl<p><span>Available Languages: </span><a href="/en/mod/mod_lbmethod_heartbeat.html" title="English"> en </a></p>
cb7d9035e080e6838f657dc10bdd5e26df08273ajsl</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 again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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cb7d9035e080e6838f657dc10bdd5e26df08273ajsl<p class="apache">Copyright 2012 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>
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