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svn path=/trunk/boinc/; revision=257
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Eric Heien 2002-07-30 23:48:08 +00:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" <title>Compute Model: handling very long computations</title>
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html lang="en"> <h2>Compute model: handling very long computations</h2>
<head>
<title>Compute Model: Handling Very Long Computations</title>
<meta name="generator" content="BBEdit 6.1.2">
</head>
<body>
<h2>Compute Model: Handling Very Long Computations</h2>
<p> <p>
Some applications have very long (multi-month) computations that Some applications have very long (multi-month) computations
generate large amounts of local state, and therefore are most that generate large amounts of local state,
efficiently done on a single host. and therefore are most efficiently done on a single host.
</p>
<p> <p>
To accommodate such applications, BOINC allows workunits and results To accommodate such applications, BOINC allows workunits and results
to be linked together into <b>sequences</b>. Each workunit and result to be linked together into <b>sequences</b>.
may have a predecessor and a successor. Each workunit and result may have a predecessor and a successor.
</p>
<p> <p>
If a result A has a predecessor B, the scheduling server will If a result A has a predecessor B,
dispatch A only to the host that has handled (or is currently handling) the scheduling server will dispatch A only
B. If result A times out, then the scheduling server will dispatch B to to the host that has handled (or is currently handling) B.
any eligible host. If result A times out,
</p> then the scheduling server will dispatch B to any eligible host.
</body>
</html>