2002-07-29 19:01:38 +00:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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<html lang="en">
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<head>
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<title>Back End Examples</title>
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<meta name="generator" content="BBEdit 6.1.2">
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</head>
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<body>
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<h2>Back End Examples</h2>
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2002-04-30 22:22:54 +00:00
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<p>
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2002-07-29 19:01:38 +00:00
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Here are some examples of the "back ends" that could be used by
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various types of project.
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</p>
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2002-04-30 22:22:54 +00:00
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<p>
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2002-07-29 19:01:38 +00:00
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<b>SETI@home with local data servers</b>
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</p>
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2002-04-30 22:22:54 +00:00
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<ul>
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2002-07-29 19:01:38 +00:00
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<li>
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A <b>splitter program</b> generates data files. For each data
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file, calls the BOINC server library to create a workunit record and
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several result records, and stores the data file on disk of a data
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server.
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</li>
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<li>
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A <b>garbage collector</b> program deletes data files for which
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enough results have been returned. Generates new result records as
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needed.
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</li>
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<li>
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A <b>result handler</b> program checks for new results. Parses
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result files, and transfers contents to a separate "science database".
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Does redundancy checking, and marks result records as valid or invalid.
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2002-07-29 19:01:38 +00:00
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</li>
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2002-04-30 22:22:54 +00:00
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</ul>
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<p>
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2002-07-29 19:01:38 +00:00
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</p>
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<b>SETI@home with remote data servers</b>
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2002-04-30 22:22:54 +00:00
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<p>
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As above, but the splitter program writes data files to DLT tape.
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The result records are generated, using the URL of a selected data
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server. The tape is mailed to the data server. An operator at the data
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server transfers the files to disk, than uses a web control panel to
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mark the batch as ready, which marks the result records as ready.
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</p>
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</body>
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</html>
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