X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=doc%2Fsession_shared.xml;h=8b0ad1cf83c362ecedf2a800f9d57717db10516f;hb=6692b8d5ffb2da3cd727a66c479d91a0218dba4e;hp=480ad35e89a3c14eda98f4275ddd870ad6048821;hpb=3eb87f587055cb7a8b57c05a18fba57b59b13928;p=metaproxy-moved-to-github.git

diff --git a/doc/session_shared.xml b/doc/session_shared.xml
index 480ad35..8b0ad1c 100644
--- a/doc/session_shared.xml
+++ b/doc/session_shared.xml
@@ -1,24 +1,36 @@
-<!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: session_shared.xml,v 1.5 2007-01-18 09:12:00 adam Exp $ -->
-<refentry>
+<refentry id="ref-session_shared">
+ <refentryinfo>
+  <productname>Metaproxy</productname>
+  <info><orgname>Index Data</orgname></info>
+ </refentryinfo>
+
  <refmeta>
   <refentrytitle>session_shared</refentrytitle>
   <manvolnum>3mp</manvolnum>
-  <refmiscinfo>Metaproxy Module</refmiscinfo>
+  <refmiscinfo class="manual">Metaproxy Module</refmiscinfo>
  </refmeta>
- 
+
  <refnamediv>
   <refname>session_shared</refname>
-  <refpurpose>Module for sharing result-sets etc. between threads</refpurpose>
+  <refpurpose> Metaproxy Module for sharing system ressorces between
+   threads</refpurpose>
  </refnamediv>
- 
+
  <refsect1><title>DESCRIPTION</title>
   <para>
-   This module allows many Z39.50 frontend sessions to share
-   a number of backend sessions. The purpose is this filter is to:
+   This filter implements global sharing of
+   result sets (i.e. between threads and therefore between
+   clients), yielding performance improvements especially when
+   incoming requests are from a stateless environment such as a
+   web-server, in which the client process representing a session
+   might be any one of many.
+   It performs the following actions:
    <itemizedlist>
     <listitem>
      <para>
@@ -27,7 +39,7 @@
     </listitem>
     <listitem>
      <para>
-      Reduce number of Initializations with backend servers.
+      Reduce the number of initializations with backend servers.
      </para>
     </listitem>
     <listitem>
@@ -49,12 +61,23 @@
       </para>
      </listitem>
     </varlistentry>
+    <varlistentry><term>Session max</term>
+     <listitem>
+      <para>
+       Specifiers maximum number of sessions to any particular
+       target. If this number (limit) is reached, the session_shared
+       module will re-use result sets even if TTL is not met.
+       Failing that the session_shared will return a diagnostic.
+       Default value is 100 sessions.
+      </para>
+     </listitem>
+    </varlistentry>
     <varlistentry><term>Result-Set TTL</term>
      <listitem>
       <para>
        When a backend session result-set is not in use for more than this
        amount of time, given in seconds, it will be deleted/reused.
-       Default value is 10 seconds.
+       Default value is 30 seconds.
       </para>
      </listitem>
     </varlistentry>
@@ -68,23 +91,42 @@
       </para>
      </listitem>
     </varlistentry>
+    <varlistentry><term>Result-Set restart</term>
+     <listitem>
+      <para>
+       Boolean which specifies whether session_shared should to try to
+       recover a failed search. If a search results in diagnostic 2:
+       temporary system error, or a negative hit count, the search
+       will be performed once again on another or new Z39.50 session.
+       Default value is true (enabled).
+      </para>
+     </listitem>
+    </varlistentry>
    </variablelist>
   </para>
  </refsect1>
 
+ <refsect1><title>SCHEMA</title>
+   <literallayout><xi:include
+		     xi:href="../xml/schema/filter_session_shared.rnc"
+		     xi:parse="text"
+		     xmlns:xi="http://www.w3.org/2001/XInclude" />
+   </literallayout>
+ </refsect1>
+
  <refsect1><title>EXAMPLES</title>
   <para>
    Configuration:
    <screen><![CDATA[
     <filter type="session_shared">
-     <resultset ttl="10" max="3"/>
-     <session ttl="30"/>
+     <resultset ttl="10" max="3" restart="true"/>
+     <session ttl="30" max="100"/>
     </filter>
 ]]>
    </screen>
   </para>
- </refsect1> 
- 
+ </refsect1>
+
  <refsect1><title>SEE ALSO</title>
   <para>
    <citerefentry>
@@ -93,21 +135,13 @@
    </citerefentry>
   </para>
  </refsect1>
- 
+
  &copyright;
 </refentry>
 
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