65 lines
5.0 KiB
HTML
65 lines
5.0 KiB
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<meta name="DC.Title" content="Remote unit of work" />
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<meta name="abstract" content="Remote unit of work (RUW) is a form of distributed relational database processing in which an application program can access data on a remote database within a unit of work. A remote unit of work can include more than one relational database request, but all requests must be made to the same remote database. All requests to a relational database must be completed (either committed or rolled back) before requests can be sent to another relational database." />
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<meta name="description" content="Remote unit of work (RUW) is a form of distributed relational database processing in which an application program can access data on a remote database within a unit of work. A remote unit of work can include more than one relational database request, but all requests must be made to the same remote database. All requests to a relational database must be completed (either committed or rolled back) before requests can be sent to another relational database." />
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<meta name="DC.subject" content="remote unit of work (RUW), definition, RUW (remote unit of work)" />
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<title>Remote unit of work</title>
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</head>
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<body id="rbal1ruw"><a name="rbal1ruw"><!-- --></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">Remote unit of work</h1>
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<div><p><dfn class="term">Remote unit of work</dfn> (RUW) is a form of distributed
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relational database processing in which an application program can access
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data on a remote database within a unit of work. A remote unit of work can
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include more than one relational database request, but all requests
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must be made to the same remote database. All requests to a relational database
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must be completed (either committed or rolled back) before requests can be
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sent to another relational database.</p>
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<p>This is shown in the following figure.</p>
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<div class="fignone" id="rbal1ruw__rbal1runit"><a name="rbal1ruw__rbal1runit"><!-- --></a><span class="figcap">Figure 1. Remote unit of work in a distributed relational
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database</span><br /><img src="rbal1503.gif" alt="Remote unit of work in a distributed relational database" /><br /></div>
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<p>Remote unit of work is application-directed distribution because the application
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program must connect to the correct relational database system before issuing
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the requests. However, the application program only needs to know the name
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of the remote database to make the correct connection.</p>
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<p>Remote unit of work support enables an application program to read or update
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data at more than one location. However, all the data that the program accesses
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within a unit of work must be managed by the same relational database management
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system. For example, the shop inventory application program must commit its
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inventory and accounts receivable unit of work before it can read or update
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tables that are in another location.</p>
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<p>In remote unit of work processing, each computer has an associated relational
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database management system and an associated application requester program
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that help process distributed relational data requests. This allows you or
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your application program to request remote relational data in much the same
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way as you request local relational data.</p>
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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="rbal1drdbp.htm" title="A relational database is a set of data stored in one or more tables in a computer.">Distributed relational database processing</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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