Errorneous WUs reported as success!

Questions and Answers : Windows : Errorneous WUs reported as success!

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Fabian

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Message 21551 - Posted: 1 Aug 2006, 16:14:15 UTC

Hello,

one of my Windows hosts (278976) recently reported two WUs as success after one second of computing. Result IDs are 30428973 and 30428513.

This machine suffered a lot of crashes recently, and the workunits started from zero after each reboot.

I think this is important, since the WUs are not sent out again automatically.

BOINC version 5.4.9, Rosetta 5.25

Regards,
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Message 21588 - Posted: 2 Aug 2006, 3:27:20 UTC

Fabian, Welcome to Rosetta!

If your primary concern is to get the WUs processed, no worries. It's all taken care of. You see the same WUs are sent to 100s of PCs, each of which selects a random area of the protein to start working on. Over time, with enough of these random areas studied, an accurate prediction is found. The search space far exceeds our ability to grind through every combination. If any one of us gets in the right ballpark, Rosetta will hone in on the desired prediction. So, your failed WUs simply represent a few specific random starting points that were not directly investigated... well... we assume. Possible someone else picked same random numbers, but very unlikely. But, no worries. There's trillions of random starting points that never get crunched, and good predictions are found anyway. Just how it works.
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Fabian

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Message 21621 - Posted: 2 Aug 2006, 12:03:56 UTC - in response to Message 21588.  

You see the same WUs are sent to 100s of PCs, each of which selects a random area of the protein to start working on.


Ah, I understand. I thought the starting points were laid out by the server in some intelligent manner. But in this case, it's only a minor bug. Thanks for the explanation!

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Questions and Answers : Windows : Errorneous WUs reported as success!



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