69 lines
4.4 KiB
HTML
69 lines
4.4 KiB
HTML
<?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="concept" />
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<meta name="DC.Title" content="Backup and recovery timeline" />
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<meta name="abstract" content="The timeline for backup and recovery begins when you save information, and ends when your system is fully recovered after a failure." />
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<meta name="description" content="The timeline for backup and recovery begins when you save information, and ends when your system is fully recovered after a failure." />
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<meta name="DC.Relation" scheme="URI" content="rzaj1overview.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaj1whattosave.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaj1teststrat.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2000, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2000, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzaj1timeline" />
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<meta name="DC.Language" content="en-us" />
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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>Backup and recovery timeline</title>
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</head>
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<body id="rzaj1timeline"><a name="rzaj1timeline"><!-- --></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 timeline</h1>
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<div><p>The timeline for backup and recovery begins when you save information,
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and ends when your system is fully recovered after a failure.</p>
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<div class="p">Refer to this timeline as you read this information and make decisions.
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Your strategies for saving and availability determine these things: <ul><li>Whether you can successfully complete each step in the chart</li>
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<li>How long it will take you to complete each step</li>
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</ul>
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</div>
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<p>Use the following timeline to develop specific examples. What if the known
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point (1) is Sunday evening and the failure point (2) is Thursday afternoon?
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How long will it take to get back to the known point? How long will it take
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you to get to the current point (6)? Is it even possible with the save strategy
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that you have planned?</p>
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<br /><img src="rzaj1001.gif" alt="Backup and Recovery timeline
from point of last save to full system recovery" /><br /><p>Here is a description for the timeline image:</p>
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<ul><li>Point 1: Known point (last save). Activity occurs on system.</li>
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<li>Point 2: Failure occurs. Hardware repair or Initial Program Load (IPL)
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occurs.</li>
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<li>Point 3: Hardware is available. Information is restored from backup.</li>
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<li>Point 4: System is recovered to known point 1. Transactions from point
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1 to point 2 are recovered.</li>
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<li>Point 5: System is recovered to failure point 2. Business activity from
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failure point 2 to recovery point 5 is recovered.</li>
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<li>Point 6: System is current.</li>
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</ul>
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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="rzaj1overview.htm" title="This topic describes what to do in the event that you need to use backup copies if you lose information on your system.">Plan a backup and recovery strategy</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="rzaj1teststrat.htm" title="If your situation requires a medium save strategy or a complex save strategy, it requires regular review.">Test your strategy</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="rzaj1whattosave.htm" title="You should save everything in your system as often as possible.">Know what to save and how often to save it</a></div>
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</div>
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</div>
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</body>
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</html> |