89 lines
5.6 KiB
HTML
89 lines
5.6 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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<meta name="DC.Type" content="task" />
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<meta name="DC.Title" content="Perform a switchover" />
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<meta name="abstract" content="Performing a manual switchover causes the current primary node to switch over to the backup node, as defined in the cluster resource group's recovery domain." />
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<meta name="description" content="Performing a manual switchover causes the current primary node to switch over to the backup node, as defined in the cluster resource group's recovery domain." />
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<meta name="DC.Relation" scheme="URI" content="rzaigconceptsswitchover.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaigconceptsrecoverydomain.htm" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Perform a switchover</title>
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</head>
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<body id="rzaigmanageperformswitchover"><a name="rzaigmanageperformswitchover"><!-- --></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">Perform a switchover</h1>
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<div><p>Performing a manual switchover causes the current primary node
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to switch over to the backup node, as defined in the cluster resource group's
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recovery domain.</p>
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<div class="section"><p>When this happens, the current roles of the nodes in the recovery
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domain of a cluster resource group change such that:</p>
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<ul><li>The current primary node is assigned the role of last active backup.</li>
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<li>The current first backup is assigned the role of primary.</li>
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<li>Subsequent backups are moved up one in the order of backups.</li>
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</ul>
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<p><img src="./delta.gif" alt="Start of change" />A switchover is only allowed on primary-backup model
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CRGs that have a status of ACTIVE. <img src="./deltaend.gif" alt="End of change" /></p>
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<div class="note"><span class="notetitle">Note:</span> If you are performing a switchover
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on a switchable device (also known as a device CRG), you should synchronize
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user profile name, UID, and GID for performance reasons.</div>
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<p><strong>Using iSeries™ Navigator</strong></p>
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<p>This
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requires Option 41 (HA Switchable Resources) to be installed and licensed.</p>
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<p>To
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switch a resource - a switchable hardware group, switchable application, or
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switchable data group - from the primary node to the backup node in the recovery
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domain, the resource must have a status of <span class="uicontrol">Started</span>.</p>
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<p>To
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perform a switchover on a resource, follow these steps:</p>
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</div>
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<ol><li><span>In iSeries Navigator,
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expand <span class="uicontrol">Management Central</span>.</span></li>
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<li><span>Expand <span class="uicontrol">Clusters</span>.</span></li>
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<li><span>Expand the cluster containing the desired resource.</span></li>
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<li><span>Click <span class="uicontrol">Switchable Hardware</span>, <span class="uicontrol">Switchable
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Software</span>, or <span class="uicontrol">Switchable Data</span>.</span></li>
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<li><span>Right-click the desired resource, and select <span class="uicontrol">Switch</span>.</span></li>
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</ol>
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<div class="section"><p><strong>Using Cluster APIs</strong></p>
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<p>You can also use the following
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to perform a switchover:</p>
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<ul><li><a href="../cl/chgcrgpri.htm"><span class="cmdname">Change
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Cluster Resource Group Primary (CHGCRGPRI)</span> command</a> </li>
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<li><a href="../apis/clrginitso.htm"><span class="apiname">Initiate
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Switchover (QcstInitiateSwitchOver)</span> API</a> </li>
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</ul>
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</div>
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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="rzaigmanage.htm" title="This topic contains information that covers some of the tasks that involve managing your clusters.">Manage clusters</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzaigconceptsrecoverydomain.htm" title="A recovery domain is a subset of cluster nodes that are grouped together in a cluster resource group (CRG) for a common purpose such as performing a recovery action or synchronizing events.">Recovery domain</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzaigconceptsswitchover.htm" title="Switchover happens when you manually switch access to a resource from one server to another.">Switchover</a></div>
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<div><a href="../rzaly/rzalysynchronizeid.htm">Synchronize user profile name, UID, and GID</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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