doc/load_balance.xml

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   7 <refentry id="ref-load_balance">
   8  <refentryinfo>
   9   <productname>Metaproxy</productname>
  10   <info><orgname>Index Data</orgname></info>
  11  </refentryinfo>
  12
  13  <refmeta>
  14   <refentrytitle>load_balance</refentrytitle>
  15   <manvolnum>3mp</manvolnum>
  16   <refmiscinfo class="manual">Metaproxy Module</refmiscinfo>
  17  </refmeta>
  18
  19  <refnamediv>
  20   <refname>load_balance</refname>
  21   <refpurpose>Metaproxy Module balancing load among multiple identical
  22   Z39.50 targets</refpurpose>
  23  </refnamediv>
  24
  25  <refsect1><title>DESCRIPTION</title>
  26   <para>
  27    This filter balances load among Z39.50 targets based on statistics
  28    gathered on number of open sessions and number of open package requests.
  29   </para>
  30   <para>
  31    The load balancing is depending on targets to be specified (vhosts).
  32    Most Z39.50 clients do not specify that. For this reason, this
  33    filter is mostly used as a follower to filter virt_db.
  34   </para>
  35  </refsect1>
  36
  37  <refsect1><title>EXAMPLES</title>
  38   <para>
  39    This configuration offers one database, <literal>Default</literal>,
  40    which is load-balanced between two backend servers.
  41    <screen><![CDATA[
  42     <filter type="virt_db"/>
  43       <database>Default</database>
  44       <target>host1:210/Default</target>
  45       <target>host2:210/Default</target>
  46     </filter>
  47     <filter type="load_balance"/>
  48 ]]>
  49    </screen>
  50   </para>
  51
  52  </refsect1>
  53
  54  <refsect1><title>SEE ALSO</title>
  55   <para>
  56    <citerefentry>
  57     <refentrytitle>virt_db</refentrytitle>
  58     <manvolnum>3mp</manvolnum>
  59    </citerefentry>
  60   </para>
  61  </refsect1>
  62
  63  &copyright;
  64 </refentry>
  65
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