doc/load_balance.xml

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   7 <refentry id="ref-load_balance">
   8  <refmeta>
   9   <refentrytitle>load_balance</refentrytitle>
  10   <manvolnum>3mp</manvolnum>
  11    <refmiscinfo>Metaproxy Module</refmiscinfo>
  12 </refmeta>
  13
  14  <refnamediv>
  15   <refname>load_balance</refname>
  16   <refpurpose>Metaproxy Module balancing load among multiple identical
  17   Z39.50 targets</refpurpose>
  18  </refnamediv>
  19
  20  <refsect1><title>DESCRIPTION</title>
  21   <para>
  22    This filter balances load among Z39.50 targets based on statistics
  23    gathered on number of open sessions and number of open package requests.
  24   </para>
  25   <para>
  26    The load balancing is depending on targets to be specified (vhosts).
  27    Most Z39.50 clients do not specify that. For this reason, this
  28    filter is mostly used as a follower to filter virt_db.
  29   </para>
  30  </refsect1>
  31
  32  <refsect1><title>EXAMPLES</title>
  33   <para>
  34    This configuration offers one database, <literal>Default</literal>,
  35    which is load-balanced between two backend servers.
  36    <screen><![CDATA[
  37     <filter type="virt_db"/>
  38       <database>Default</database>
  39       <target>host1:210/Default</target>
  40       <target>host2:210/Default</target>
  41     </filter>
  42     <filter type="load_balance"/>
  43 ]]>
  44    </screen>
  45   </para>
  46
  47  </refsect1>
  48
  49  <refsect1><title>SEE ALSO</title>
  50   <para>
  51    <citerefentry>
  52     <refentrytitle>virt_db</refentrytitle>
  53     <manvolnum>3mp</manvolnum>
  54    </citerefentry>
  55   </para>
  56  </refsect1>
  57
  58  &copyright;
  59 </refentry>
  60
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