77 lines
5.6 KiB
HTML
77 lines
5.6 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html lang="en-us" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow" />
|
|
<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))' />
|
|
<meta name="DC.Type" content="concept" />
|
|
<meta name="DC.Title" content="Device domains" />
|
|
<meta name="abstract" content="A device domain is a subset of nodes in a cluster that share device resources. More specifically, nodes in a device domain can participate in a switching action for some collection of resilient device resources." />
|
|
<meta name="description" content="A device domain is a subset of nodes in a cluster that share device resources. More specifically, nodes in a device domain can participate in a switching action for some collection of resilient device resources." />
|
|
<meta name="DC.Relation" scheme="URI" content="rzaigconceptselements.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzaigplanoption41.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzaigscenariosswitcheddiskiasp.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzaigmanageaddnodedevicedomain.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzaigmanageremovenodedevicedomain.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzaigmanageaddnodedevicedomain.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzaigmanageremovenodedevicedomain.htm" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="rzaigconceptsdevicedomain" />
|
|
<meta name="DC.Language" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|
<title>Device domains</title>
|
|
</head>
|
|
<body id="rzaigconceptsdevicedomain"><a name="rzaigconceptsdevicedomain"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Device domains</h1>
|
|
<div><p>A <dfn class="term">device domain</dfn> is a subset of nodes in a cluster
|
|
that share device resources. More specifically, nodes in a device domain can
|
|
participate in a switching action for some collection of resilient device
|
|
resources.</p>
|
|
<p>Device domains are identified and managed through a set of interfaces that
|
|
allow you to add a node to a device domain or remove a node from a device
|
|
domain.</p>
|
|
<p>Device domains are used to manage certain global information necessary
|
|
to switch a resilient device from one node to another. All nodes in the device
|
|
domain need this information to ensure that no conflicts occur when devices
|
|
are switched. For example, for a collection of switchable independent disk
|
|
pools, the independent disk pool identification, disk unit assignments, and
|
|
virtual address assignments must be unique across the entire device domain.</p>
|
|
<br /><img src="rzaig502.gif" alt="A data CRG featuring a device domain and an external expansion unit" /><br /><p>A cluster node can belong to at most one device domain. Before a node can
|
|
be added to the recovery domain for a device CRG, the node must be first defined
|
|
as a member of a device domain. All nodes that will be in the recovery domain
|
|
for a device CRG must be in the same device domain.</p>
|
|
<p>To create and manage device domains, you must have Option 41 (<span class="keyword">i5/OS™</span> - HA Switchable Resources)
|
|
installed and a valid license key on your system.</p>
|
|
</div>
|
|
<div>
|
|
<ul class="ullinks">
|
|
<li class="ulchildlink"><strong><a href="rzaigplanoption41.htm">Option 41 (HA Switchable Resources)</a></strong><br />
|
|
To create and manage device domains, you must have
|
|
Option 41 (<span class="keyword">i5/OS</span> - HA Switchable
|
|
Resources) installed and a valid license key on your system.</li>
|
|
</ul>
|
|
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaigconceptselements.htm" title="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.">The elements of a cluster</a></div>
|
|
</div>
|
|
<div class="relconcepts"><strong>Related concepts</strong><br />
|
|
<div><a href="rzaigscenariosswitcheddiskiasp.htm" title="A cluster using switched disk technology provides an alternative to having the data replicated. In a switched disk cluster, the data is actually contained in independent disk pools (also referred to as independent ASPs).">Example: A switched disk cluster using independent disk pools</a></div>
|
|
</div>
|
|
<div class="reltasks"><strong>Related tasks</strong><br />
|
|
<div><a href="rzaigmanageaddnodedevicedomain.htm" title="A device domain is a subset of nodes in a cluster that share device resources.">Add a node to a device domain</a></div>
|
|
<div><a href="rzaigmanageremovenodedevicedomain.htm" title="A device domain is a subset of nodes in a cluster that share device resources.">Remove a node from a device domain</a></div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |