97 lines
6.8 KiB
HTML
97 lines
6.8 KiB
HTML
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<!DOCTYPE html
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<meta name="DC.Title" content="Backup and recovery of clusters" />
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<meta name="abstract" content="If you use clustering on your systems, it is still important that you create a backup and recovery strategy to protect your data." />
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<title>Backup and recovery of clusters</title>
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</head>
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<body id="rzaigconfigbackupandrecovery"><a name="rzaigconfigbackupandrecovery"><!-- --></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">Backup and recovery of clusters</h1>
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<div><p>If you use clustering on your systems, it is still important
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that you create a backup and recovery strategy to protect your data.</p>
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<div class="section"><p>If you are planning on using clustering as your backup strategy
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so that you have one system up and running while the other system is down
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when its being backed up, it is recommended that you have a minimum of three
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systems in the cluster. By having three systems in the cluster, you will always
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have one system to switch over to should a failure occur.</p>
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<p><strong>Saving
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and restoring cluster resource groups</strong></p>
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<p>You can save a cluster resource
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group whether the cluster is active or inactive. The following restrictions
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apply for restoring a cluster resource group:</p>
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<ul><li>If the cluster is up and the cluster resource group is known to that cluster,
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you cannot restore the cluster resource group.</li>
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<li>If the node is not configured for a cluster, you cannot restore a cluster
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resource group.</li>
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</ul>
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<p>You can restore a cluster resource group if the cluster is active,
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the cluster resource group is not known to that cluster, the node is in the
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recovery domain of that cluster resource group, and the cluster name matches
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that in the cluster resource group. You can restore a cluster resource group
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if the cluster is configured but is not active on that node and if that node
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is in the recovery domain of that cluster resource group.</p>
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<p><strong>Preparing
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for a disaster</strong></p>
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<p>In the case of a disaster, you will need to reconfigure
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your cluster. In order to prepare for such a scenario, it is recommended that
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you save your cluster configuration information and keep a hardcopy printout
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of that information.</p>
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</div>
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<ol><li><span>Use the <a href="../cl/savcfg.htm"><span class="cmdname">Save
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Configuration (SAVCFG)</span> command</a> or the <a href="../cl/savsys.htm"><span class="cmdname">Save System (SAVSYS)</span> command </a>after
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making cluster configuration changes so that the restored internal cluster
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information is current and consistent with other nodes in the cluster. See
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Saving configuration information for details on performing a SAVCFG or SAVSYS.</span></li>
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<li><img src="./delta.gif" alt="Start of change" /><span>Print a copy of cluster configuration
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information every time you change it. You can use the <a href="../cl/dspcluinf.htm"><span class="cmdname">Display Cluster Information
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(DSPCLUINF)</span> command</a> to print the cluster configuration. Keep
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a copy with your backup tapes to use in case of a disaster where you want
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to reconfigure your entire cluster.</span><img src="./deltaend.gif" alt="End of change" /></li>
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</ol>
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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="rzaigtroubleshootrestorecluster.htm" title="During normal operations, you should never must restore from a backup tape.">Restore a cluster from backup tapes</a></div>
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<div><a href="../rzaiu/rzaiurzaiu137.htm">Saving configuration information</a></div>
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<div><a href="rzaigtroubleshootrecoversystemloss.htm" title="Use this information in conjunction with the appropriate checklist in the Backup and Recovery manual for recovering your entire system after a complete system loss when your server loses power unexpectedly.">Recover a cluster after a complete system loss</a></div>
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<div><a href="rzaigmanagesaveclusterconfig.htm" title="You can use commands to save your cluster resource group objects.">Save cluster configurations</a></div>
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<div><a href="rzaigtroubleshootrecovernaturaldisaster.htm" title="In the case of a disaster where all your nodes are lost, you will need to reconfigure your cluster.">Recover a cluster after a disaster</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="../rzaj1/rzaj1overview.htm">Planning a backup and recovery strategy</a></div>
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<div><a href="../rzaiu/rzaiurzaiu101.htm">Printing system information</a></div>
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</div>
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</div>
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</body>
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</html> |