62 lines
3.7 KiB
HTML
62 lines
3.7 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="reference" />
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<meta name="DC.Title" content="Data needs for distributed relational databases" />
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<meta name="abstract" content="The first step in your analysis is to determine which factors affect your data and how they affect it." />
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<meta name="description" content="The first step in your analysis is to determine which factors affect your data and how they affect it." />
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<meta name="DC.subject" content="data needs, determining" />
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<meta name="keywords" content="data needs, determining" />
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<meta name="DC.Relation" scheme="URI" content="rbal1idyourneeds.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Data needs for distributed relational databases</title>
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</head>
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<body id="rbal1dataneeds"><a name="rbal1dataneeds"><!-- --></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">Data needs for distributed relational databases</h1>
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<div><p>The first step in your analysis is to determine which factors affect
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your data and how they affect it. </p>
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<div class="section"><p>Ask yourself the following questions: </p>
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</div>
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<div class="section"><ul><li>What locations are involved?</li>
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<li>What kind of transactions do you envision?</li>
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<li>What data is needed for each transaction?</li>
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<li>What dependencies do items of data have on each other, especially referential
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limitations? For example, will information in one table need to be checked
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against the information in another table? (If so, both tables must be kept
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at the same location.)</li>
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<li>Does the data currently exist? If so, where is it located? Who "owns"
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it (that is, who is responsible for maintaining the accuracy of the data)?</li>
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<li>What priority do you place on the availability of the needed data? Integrity
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of the data across locations? Protection of the data from unauthorized access?</li>
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<li>What access patterns do you envision for the data? For instance, will
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the data be read, updated, or both? How frequently? Will a typical
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access return a lot of data or a little data?</li>
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<li>What level of performance do you expect from each transaction? What response
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time is acceptable?</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="rbal1idyourneeds.htm" title="Consider these items when analyzing your needs and expectations of a distributed relational database.">Identify your needs and expectations for a distributed relational database</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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