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World Community Grid Forums
Category: Completed Research
Forum: FightAIDS@Home
Thread: boinc vs. UD |
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Thread Status: Active Total posts in this thread: 8
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hello there. I have a concern that since the boinc files are not encrypted like UD's files are, that someone could tinker with the results before they are sent?
How is this issue dealt with? Thanks. btw: reading the check boint files and the results files through boinc is actually really interesting. |
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Dirk Gently
Senior Cruncher England Joined: Mar 1, 2005 Post Count: 153 Status: Offline Project Badges: 
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I think this is handled by the fact that BOINC requires a quorum of results from several users to be exactly the same, whereas UD client does not.
----------------------------------------Pros and cons - The encryption does not guarantee the correctness of results, only that they are unchanged in transit. The quorum idea is very powerful, but surely wastes at least 50% of the grid power by duplication. Robert |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
UD uses duplication too. I think work units are sent to 4 machines each. It's the only way to detect invalid or modified results. Computational errors are quite common, especially on overclocked machines.
Your computer is not as reliable as you may think. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
what he said.
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retsof
Former Community Advisor USA Joined: Jul 31, 2005 Post Count: 6824 Status: Offline Project Badges: 
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Doesn't boinc give everybody the same score on that workunit? ???? penalizing fast machines?
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SUPPORT ADVISOR
Work+GPU i7 8700 12threads School i7 4770 8threads Default+GPU Ryzen 7 3700X 16threads Ryzen 7 3800X 16 threads Ryzen 9 3900X 24threads Home i7 3540M 4threads50% |
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retsof
Former Community Advisor USA Joined: Jul 31, 2005 Post Count: 6824 Status: Offline Project Badges:
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UD uses duplication too. I think work units are sent to 4 machines each. It's the only way to detect invalid or modified results. Computational errors are quite common, especially on overclocked machines. ...and on machines with mismatched or bad memory...Your computer is not as reliable as you may think. At least 4, I would think. If they don't come back, some more even go out again later.
SUPPORT ADVISOR
----------------------------------------Work+GPU i7 8700 12threads School i7 4770 8threads Default+GPU Ryzen 7 3700X 16threads Ryzen 7 3800X 16 threads Ryzen 9 3900X 24threads Home i7 3540M 4threads50% [Edit 1 times, last edit by retsof at Mar 6, 2006 11:03:52 PM] |
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KMitz
Cruncher Joined: Nov 23, 2005 Post Count: 1 Status: Offline |
Hello,
I'm using the Boinc agent since a few days, and now I get more points by unit. Before, I was receiving about 170 pts/unit with UD. Now I got more than 400 pts/unit, whereas the computing time has not changed (about 4:30/unit) Can anybody explain this increase? Thanks! |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Scores are computed differently for UD and BOINC. The WCG staff looked over some early work units done on both systems and arrived at a rough conversion factor of 7 UD points = 1 BOINC point. But some people will be big winners and some people big losers. Since UD puts a cap on scoring and BOINC does not, people with fast processors ought to do much better on BOINC.
Lawrence |
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