/usr/share/doc/polyorb-doc/html/polyorb_ug/Partition-Attribute-Termination.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- This is free software; you can redistribute it and/or modify it under
terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.  This software is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>. -->
<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
<head>
<title>PolyORB User&rsquo;s Guide: Partition Attribute Termination</title>

<meta name="description" content="PolyORB User&rsquo;s Guide: Partition Attribute Termination">
<meta name="keywords" content="PolyORB User&rsquo;s Guide: Partition Attribute Termination">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link href="About-This-Guide.html#About-This-Guide" rel="start" title="About This Guide">
<link href="Index.html#Index" rel="index" title="Index">
<link href="About-This-Guide.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="The-Configuration-Language.html#The-Configuration-Language" rel="up" title="The Configuration Language">
<link href="Partition-Attribute-Reconnection.html#Partition-Attribute-Reconnection" rel="next" title="Partition Attribute Reconnection">
<link href="Partition-Attribute-Environment_005fVariables.html#Partition-Attribute-Environment_005fVariables" rel="prev" title="Partition Attribute Environment_Variables">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smalllisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en">
<a name="Partition-Attribute-Termination"></a>
<div class="header">
<p>
Next: <a href="Partition-Attribute-Reconnection.html#Partition-Attribute-Reconnection" accesskey="n" rel="next">Partition Attribute Reconnection</a>, Previous: <a href="Partition-Attribute-Environment_005fVariables.html#Partition-Attribute-Environment_005fVariables" accesskey="p" rel="prev">Partition Attribute Environment_Variables</a>, Up: <a href="The-Configuration-Language.html#The-Configuration-Language" accesskey="u" rel="up">The Configuration Language</a> &nbsp; [<a href="About-This-Guide.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Partition-Attribute-Termination-1"></a>
<h4 class="subsubsection">8.5.4.22 Partition Attribute Termination</h4>

<p>The Ada Reference Manual does not provide any specific rule to handle
global termination of a distributed application (see <a href="Abortion-and-Termination.html#Abortion-and-Termination">Abortion and Termination</a>).
</p>
<p>In PolyORB/DSA, by default, a set of partitions terminates when each partition
can terminate and when no message remains to be delivered. A distributed
algorithm that checks for this global condition is activated
periodically by the main boot server.
</p>
<div class="smallexample">
<pre class="smallexample">

TERMINATION_LITERAL ::= Global_Termination |
                        Local_Termination  |
                        Deferred_Termination

REPRESENTATION_CLAUSE ::=
   <b>for</b> PARTITION_IDENTIFIER'Termination <b>use</b> TERMINATION_LITERAL;

</pre></div>

<ul>
<li> When a partition is configured with the global termination policy,
it terminates as soon as the main boot server sends a signal to do
so. The main boot server checks periodically whether the application can
terminate. When all partitions are ready to terminate, the main boot
server sends to each partition a termination request. The global
termination policy is the default policy.

</li><li> The deferred termination policy is very similar to the global
termination. The only difference is that when a partition with a
deferred termination policy receives a termination request, it just
ignores it. This policy allows a partition to run forever without
preventing a set of partitions from terminating.

</li><li> When a partition is configured with the local termination policy,
it terminates as soon as the classical Ada termination is detected by
the partition. It means that this partition does not wait for the
termination request of the main boot server.

</li></ul>





</body>
</html>
polyorb-doc 2.11~20140418-3.2 / usr / share / doc / polyorb-doc / html / polyorb_ug / Partition-Attribute-Termination.html
