341 lines
11 KiB
HTML
341 lines
11 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>Retrieve Cluster Information (QcstRetrieveClusterInfo) API</title>
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!-- Edited by Kersten Oct 2001 -->
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<!-- End Header Records -->
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<!-- -->
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<!-- -->
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<!-- -->
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<!-- Begin Developer Note ========================================== -->
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<!-- NOTE: If you are adding, changing, or removing ANY requirements -->
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<!-- for this API chance are good that the GUI code need to change -->
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<!-- also. The Cluster GUI code is built on top of this API and it -->
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<!-- does a certain amount of explicit and implicit validation -->
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<!-- checking of user data prior to the API call being made. Please -->
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<!-- have the Cluster GUI developer check the -->
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<!--/as400/v5r4m0.guix/cur/cmvc/java.pgm/ugcl.guix/com/ibm/as400/opnav/ugcl/ClGuiActionsManager.java/ClGuiActionsManager.java -->
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<!-- part to determine if any Cluster GUI code changes are needed. -->
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<!-- End Developer Note -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<!--Java sync-link-->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<h2>Retrieve Cluster Information (QcstRetrieveClusterInfo) API</h2>
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<div class="box" style="width: 70%;">
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<br>
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Required Parameter Group:<br>
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<!-- iddvc RMBR -->
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<br>
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<table width="100%">
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<tr>
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<td align="center" valign="top" width="10%">1</td>
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<td align="left" valign="top" width="50%">Receiver variable</td>
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<td align="left" valign="top" width="20%">Output</td>
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<td align="left" valign="top" width="20%">Char(*)</td>
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</tr>
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<tr>
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<td align="center" valign="top">2</td>
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<td align="left" valign="top">Length of receiver variable</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">3</td>
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<td align="left" valign="top">Format name</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Char(8)</td>
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</tr>
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<tr>
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<td align="center" valign="top">4</td>
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<td align="left" valign="top">Error code</td>
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<td align="left" valign="top">I/O</td>
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<td align="left" valign="top">Char(*)</td>
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</tr>
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</table>
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<br>
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Service Program: QCSTCTL1<br>
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<!-- iddvc RMBR -->
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<br>
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Default Public Authority: *USE<br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: Yes<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The Retrieve Cluster Information (QcstRetrieveClusterInfo) API retrieves
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information about the clustering environment on a requesting node. The
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requesting node does not need to be active in the cluster to retrieve the
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information. However, some of the information will not be returned if the
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requesting node is not currently a member of a cluster and the requesting node
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was never activated. This API may be called from a cluster resource group exit
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program.</p>
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<br>
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<h3>Authorities and Locks</h3>
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<p>None</p>
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<br>
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<h3>Required Parameter Group</h3>
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<dl>
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<dt><strong>Receiver variable</strong></dt>
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<dd>OUTPUT; CHAR(*)</dd>
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<dd>
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<p>The receiver variable that receives the information requested. You can
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specify the size of the area to be smaller than the format requested as long as
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you specify the length parameter correctly. As a result, the API returns only
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the data that the area can hold.</p>
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</dd>
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<dt><strong>Length of receiver variable</strong></dt>
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<dd>INPUT; BINARY(4)</dd>
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<dd>
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<p>The length of the receiver variable provided. The length of receiver
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variable parameter may be specified up to the size of the receiver variable
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specified in the user program. If the length of receiver variable parameter
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specified is larger than the allocated size of the receiver variable specified
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in the user program, the results are not predictable. The minimum length is 8
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bytes.</p>
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</dd>
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<dt><strong>Format name</strong></dt>
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<dd>INPUT; CHAR(8)</dd>
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<dd>
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<p>The content and format of the information that is returned. The possible
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format names are as follows:</p>
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<table cellpadding="5">
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<!-- cols="25 75" -->
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<tr>
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<td align="left" valign="top"><em><a href="#rcli0100">RCLI0100</a></em></td>
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<td align="left" valign="top">Cluster information</td>
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</tr>
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</table>
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<br>
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</dd>
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<dt><strong>Error code</strong></dt>
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<dd>I/O; CHAR(*)</dd>
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<dd>
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<p>The structure in which to return error information. For the format of the
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structure, see <a href="../apiref/error.htm#hdrerrcod">Error Code Parameter</a>.</p>
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</dd>
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</dl>
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<br>
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<h3><a name="rcli0100">RCLI0100 Format</a></h3>
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<table border width="80%">
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<tr>
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<th align="center" valign="bottom" colspan="2">Offset</th>
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<th align="left" valign="bottom" rowspan="2">Type</th>
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<th align="left" valign="bottom" rowspan="2">Field</th>
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</tr>
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<tr>
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<th align="center" valign="bottom">Dec</th>
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<th align="center" valign="bottom">Hex</th>
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</tr>
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<tr>
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<td align="center" valign="top" width="10%">0</td>
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<td align="center" valign="top" width="10%">0</td>
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<td align="left" valign="top" width="20%">BINARY(4)</td>
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<td align="left" valign="top" width="60%">Bytes returned</td>
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</tr>
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<tr>
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<td align="center" valign="top">4</td>
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<td align="center" valign="top">4</td>
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<td align="left" valign="top">BINARY(4)</td>
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<td align="left" valign="top">Bytes available</td>
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</tr>
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<tr>
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<td align="center" valign="top">8</td>
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<td align="center" valign="top">8</td>
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<td align="left" valign="top">CHAR(10)</td>
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<td align="left" valign="top">Cluster name</td>
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</tr>
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<tr>
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<td align="center" valign="top">18</td>
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<td align="center" valign="top">12</td>
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<td align="left" valign="top">CHAR(8)</td>
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<td align="left" valign="top">Requesting node id</td>
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</tr>
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<tr>
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<td align="center" valign="top">26</td>
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<td align="center" valign="top">1A</td>
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<td align="left" valign="top">CHAR(2)</td>
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<td align="left" valign="top">Reserved</td>
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</tr>
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<tr>
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<td align="center" valign="top">28</td>
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<td align="center" valign="top">1C</td>
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<td align="left" valign="top">BINARY(4)</td>
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<td align="left" valign="top">Current cluster version</td>
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</tr>
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<tr>
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<td align="center" valign="top">32</td>
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<td align="center" valign="top">20</td>
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<td align="left" valign="top">BINARY(4)</td>
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<td align="left" valign="top">Current cluster version modification level</td>
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</tr>
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<tr>
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<td align="center" valign="top">36</td>
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<td align="center" valign="top">24</td>
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<td align="left" valign="top">BINARY(4)</td>
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<td align="left" valign="top">Potential node version</td>
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</tr>
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<tr>
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<td align="center" valign="top">40</td>
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<td align="center" valign="top">28</td>
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<td align="left" valign="top">BINARY(4)</td>
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<td align="left" valign="top">Potential node version modification level</td>
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</tr>
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</table>
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<h3>Field Descriptions</h3>
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<p><strong>Bytes available.</strong> The number of bytes of data available to
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be returned to the user.</p>
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<p><strong>Bytes returned.</strong> The number of bytes of data returned to the
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user.</p>
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<p><strong>Cluster name.</strong> The name of the cluster. If no cluster exists
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on the system, *NONE is returned.</p>
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<p><strong>Current cluster version.</strong> The version at which the nodes in
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the cluster are actively communicating with each other. This value in
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conjunction with the potential node version determines what nodes can join in
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the cluster. This value also determines the cluster's ability to use new
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functions supported by the node's potential node version. It is set when the
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cluster is created and can be changed by the <a href="clcntchgcv.htm">Adjust
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Cluster Version (QcstAdjustClusterVersion) API</a>. If no cluster exists, the
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field will be set to 0.</p>
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<p><strong>Current cluster version modification level.</strong> The
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modification level of the current cluster version. The modification level
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further identifies the version at which the nodes in the cluster communicate.
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It is updated when code changes that impact the version are applied to the
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system. If no cluster exists, the field will be set to 0.</p>
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<p><strong>Potential node version.</strong> The version at which the node is
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capable of communicating with the other nodes in the cluster. This is the value
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associated with the cluster code installed on the node. It will be used to
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determine if the node can join a cluster.</p>
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<p><strong>Potential node version modification level.</strong> The modification
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level of the potential node version. The modification level further identifies
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the version at which the node is capable of communicating with the other nodes
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in the cluster. It is updated when code changes that impact the version are
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applied to the system and will also be used to determine if the node can join a
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cluster.</p>
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<p><strong>Requesting node id.</strong> The node id of the requesting cluster
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node. If no cluster exists or if the cluster has been created but never started
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on the system, *NONE is returned.</p>
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<p><strong>Reserved.</strong> This field will contain hexadecimal zeroes.<br>
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</p>
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<h3>Error Messages</h3>
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<p>Messages that are delivered
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through the error code parameter are listed here.</p>
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<table width="100%" cellpadding="5">
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<!-- cols="15 85" -->
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<tr>
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<th align="left" valign="top">Message ID</th>
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<th align="left" valign="top">Error Message Text</th>
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</tr>
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<tr>
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<td width="15%" valign="top">CPF3C1E E</td>
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<td width="85%" valign="top">Required parameter &1 omitted.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3C21 E</td>
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<td align="left" valign="top">Format name &1 is not valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3C24 E</td>
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<td align="left" valign="top">Length of the receiver variable is not
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valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3CF1 E</td>
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<td align="left" valign="top">Error code parameter not valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3CF2 E</td>
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<td align="left" valign="top">Error(s) occurred during running of &1
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API.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF9872 E</td>
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<td align="left" valign="top">Program or service program &1 in library
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&2 ended. Reason code &3.</td>
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</tr>
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</table>
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<br>
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<hr>
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API introduced: V5R1
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2" align="center">
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<tr align="center">
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
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"clust1a1.htm">Cluster APIs</a> | <a href="aplist.htm">APIs by
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category</a></td>
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</tr>
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</table></center>
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</body>
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</html>
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