93 lines
6.6 KiB
HTML
93 lines
6.6 KiB
HTML
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<meta name="DC.Title" content="The elements of a cluster" />
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<meta name="abstract" content="An iSeries cluster is a collection of one or more systems or partitions that work together as a single system. Use this information to understand the elements and their relationship to each other." />
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<meta name="DC.Relation" scheme="URI" content="rzaigconceptsclusternode.htm" />
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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>The elements of a cluster</title>
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</head>
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<body id="rzaigconceptselements"><a name="rzaigconceptselements"><!-- --></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">The elements of a cluster</h1>
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<div><p><span><img src="./delta.gif" alt="Start of change" />An <span class="keyword">iSeries™</span> <dfn class="term">cluster</dfn> is
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a collection of one or more systems or partitions that work together as a
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single system. Use this information to understand the elements
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and their relationship to each other.<img src="./deltaend.gif" alt="End of change" /></span></p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzaigconceptsclusternode.htm">Cluster node</a></strong><br />
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A <dfn class="term">cluster node</dfn> is an iSeries system or logical partition that
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is a member of a cluster.</li>
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<li class="ulchildlink"><strong><a href="rzaigconceptscrg.htm">Cluster resource group</a></strong><br />
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<span><img src="./delta.gif" alt="Start of change" />A <dfn class="term">cluster resource group (CRG)</dfn> is
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an <span class="keyword">i5/OS™</span> system object
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that is a set or grouping of cluster resources that are used to manage events
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that occur in a clustered environment. The cluster resource group describes
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a recovery domain and supplies the name of the cluster resource group exit
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program which gets called when certain cluster events occur.<img src="./deltaend.gif" alt="End of change" /></span></li>
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<li class="ulchildlink"><strong><a href="rzaigconceptsclusteradmindmn.htm">Cluster administrative domain</a></strong><br />
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A <dfn class="term">cluster administrative domain</dfn> is used to manage
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resources that need to be maintained consistently across the nodes in a clustered
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environment. </li>
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<li class="ulchildlink"><strong><a href="rzaigconceptsmre.htm">Monitored resources</a></strong><br />
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<dfn class="term">Monitored resources</dfn> are types of system resources
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that can be managed by a cluster administrative domain. These resources are
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represented in the cluster administrative domain as <dfn class="term">monitored resource
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entries (MREs)</dfn>.</li>
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<li class="ulchildlink"><strong><a href="rzaigconceptsexitprograms.htm">Cluster resource group exit programs</a></strong><br />
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A <dfn class="term">cluster resource group exit program</dfn> is called after
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a cluster-related event for a CRG occurs.</li>
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<li class="ulchildlink"><strong><a href="rzaigconceptsrecoverydomain.htm">Recovery domain</a></strong><br />
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<span><img src="./delta.gif" alt="Start of change" />A <dfn class="term">recovery domain</dfn> is a subset of
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cluster nodes that are grouped together in a cluster resource group (CRG)
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for a common purpose such as performing a recovery action or synchronizing
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events.<img src="./deltaend.gif" alt="End of change" /></span></li>
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<li class="ulchildlink"><strong><a href="rzaigplanclusterversions.htm">Cluster version</a></strong><br />
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A <dfn class="term">cluster version</dfn> represents the level of function
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available on the cluster.</li>
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<li class="ulchildlink"><strong><a href="rzaigconceptsresilientresources.htm">Resilient resources</a></strong><br />
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<dfn class="term">Resilient resources</dfn> are system resources, such as
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data, devices and applications, that are highly available if you have used
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clustering on your systems.</li>
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<li class="ulchildlink"><strong><a href="rzaigconceptsdevicedomain.htm">Device domains</a></strong><br />
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A <dfn class="term">device domain</dfn> is a subset of nodes in a cluster
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that share device resources. More specifically, nodes in a device domain can
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participate in a switching action for some collection of resilient device
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resources.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaigconcepts.htm" title="Get a complete understanding of how clusters work. Read about the benefits of clusters and how they can be important to you, as well as information on important clustering concepts and how they fit together.">Cluster concepts</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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