<?xml version="1.0"?>
<!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
<!-- $LastChangedRevision$ -->

<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->

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

<name>mod_lbmethod_heartbeat</name>
<description>Heartbeat Traffic Counting load balancer scheduler algorithm for <module
>mod_proxy_balancer</module></description>
<status>Experimental</status>
<sourcefile>mod_lbmethod_heartbeat.c</sourcefile>
<identifier>lbmethod_heartbeat_module</identifier>
<compatibility>Available in version 2.3 and later</compatibility>

<summary>
<p>lbmethod=heartbeat uses the services of <module
>mod_heartmonitor</module> to balance between origin servers that are providing
heartbeat info via the <module>mod_heartbeat</module> module.</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>
</summary>

<seealso><module>mod_proxy</module></seealso>
<seealso><module>mod_proxy_balancer</module></seealso>
<seealso><module>mod_heartbeat</module></seealso>
<seealso><module>mod_heartmonitor</module></seealso>

<directivesynopsis>
<name>HeartbeatStorage</name>
<description>Path to read heartbeat data</description>
<syntax>HeartbeatStorage <var>file-path</var></syntax>
<default>HeartbeatStorage logs/hb.dat</default>
<contextlist><context>server config</context></contextlist>

<usage>
    <p>The <directive>HeartbeatStorage</directive> directive specifies the
    path to read heartbeat data.  This flat-file is used only when
    <module>mod_slotmem_shm</module> is not loaded.</p>
</usage>
</directivesynopsis>
</modulesynopsis>
