62 lines
3.9 KiB
HTML
62 lines
3.9 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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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="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Distribute cluster-wide information" />
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<meta name="abstract" content="Learn about the security implications of using and managing cluster-wide information." />
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<meta name="description" content="Learn about the security implications of using and managing cluster-wide information." />
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<meta name="DC.Relation" scheme="URI" content="rzaigconfigsecure.htm" />
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<meta name="DC.Relation" scheme="URI" content="../apis/cldistinfo.htm" />
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<meta name="DC.Relation" scheme="URI" content="../apis/clust4a1TOC.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzaigconfigclustermessaging" />
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<meta name="DC.Language" content="en-us" />
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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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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Distribute cluster-wide information</title>
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</head>
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<body id="rzaigconfigclustermessaging"><a name="rzaigconfigclustermessaging"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Distribute cluster-wide information</h1>
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<div><p><span><img src="./delta.gif" alt="Start of change" />Learn about the security implications
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of using and managing cluster-wide information.<img src="./deltaend.gif" alt="End of change" /></span></p>
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<p>The <span class="apiname">Distribute Information (QcstDistributeInformation)</span> API
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can be used to send messages from one node in a cluster resource group recovery
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domain to other nodes in that recovery domain.This can be useful in exit program
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processing. However, it should be noted that there is no encrypting of that
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information. Secure information should not be sent using this mechanism unless
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you are using a secure network.</p>
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<p>Non-persistent data can be shared and replicated between cluster nodes
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using the Clustered Hash Table APIs. The data is stored in non-persistent
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storage. This means the data is retained only until the cluster node is no
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longer part of the clustered hash table. These APIs can only be used from
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a cluster node that is defined in the clustered hash table domain. The cluster
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node must be active in the cluster.</p>
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<p>Other information distributed via cluster messaging is similarly not secured.
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This includes the low level cluster messaging. As such, when changes are made
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to the exit program data, there is no encrypting of the message containing
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that data.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaigconfigsecure.htm" title="Consider some of the security issues you need to consider when you plan to use clustering on your systems.">Cluster security</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="../apis/cldistinfo.htm">Distribute Information (QcstDistributeInformation) API</a></div>
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<div><a href="../apis/clust4a1TOC.htm">Clustered Hash Table APIs</a></div>
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</div>
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</div>
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</body>
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</html>
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