-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN"
- "http://www.oasis-open.org/docbook/xml/4.1/docbookx.dtd" [
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.4//EN"
+ "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
<!ENTITY copyright SYSTEM "copyright.xml">
<!ENTITY % idcommon SYSTEM "common/common.ent">
%idcommon;
]>
-<!-- $Id: load_balance.xml,v 1.4 2007-05-22 11:05:45 adam Exp $ -->
<refentry id="ref-load_balance">
+ <refentryinfo>
+ <productname>Metaproxy</productname>
+ <info><orgname>Index Data</orgname></info>
+ </refentryinfo>
+
<refmeta>
<refentrytitle>load_balance</refentrytitle>
<manvolnum>3mp</manvolnum>
- <refmiscinfo>Metaproxy Module</refmiscinfo>
-</refmeta>
+ <refmiscinfo class="manual">Metaproxy Module</refmiscinfo>
+ </refmeta>
<refnamediv>
<refname>load_balance</refname>
This filter balances load among Z39.50 targets based on statistics
gathered on number of open sessions and number of open package requests.
</para>
+ <para>
+ The load balancing is depending on targets to be specified (vhosts).
+ Most Z39.50 clients do not specify that. For this reason, this
+ filter is mostly used as a follower to filter virt_db.
+ </para>
+ </refsect1>
+
+ <refsect1><title>SCHEMA</title>
+ <literallayout><xi:include
+ xi:href="../xml/schema/filter_load_balance.rnc"
+ xi:parse="text"
+ xmlns:xi="http://www.w3.org/2001/XInclude" />
+ </literallayout>
</refsect1>
<refsect1><title>EXAMPLES</title>
<para>
- A typical configuration looks like this:
+ This configuration offers one database, <literal>Default</literal>,
+ which is load-balanced between two backend servers.
<screen><![CDATA[
+ <filter type="virt_db"/>
+ <database>Default</database>
+ <target>host1:210/Default</target>
+ <target>host2:210/Default</target>
+ </filter>
<filter type="load_balance"/>
]]>
</screen>
</para>
+
</refsect1>
<refsect1><title>SEE ALSO</title>
<para>
<citerefentry>
- <refentrytitle>metaproxy</refentrytitle>
- <manvolnum>1</manvolnum>
+ <refentrytitle>virt_db</refentrytitle>
+ <manvolnum>3mp</manvolnum>
</citerefentry>
</para>
</refsect1>
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