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World Community Grid Forums
Category: Community
Forum: Chat Room
Thread: Can anyone clarify "100,000 years"...? |
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Thread Status: Active Total posts in this thread: 6
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TrevHCS
Cruncher UK Joined: May 17, 2007 Post Count: 2 Status: Offline Project Badges: 
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Just wondering if anyone can explain how this "100,000 years of runtime" is calculated. Is this the equiv. of a super computer running for 100,000 years or a normal PC for example?
Trev - even more confused than normal :) |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Normal desktop computers. Actually, the way the number is derived is a bit convoluted.
The UD agent measures wall clock time - not all the time may be devoted to WCG. The BOINC agent measures CPU time - the exact fraction of time spent on WCG. The BOINC agent also counts CPU time per core, so a dual core computer can do almost two days of runtime in one day. Told you it was complicated ;-) If you try comparing it to supercomputers, it gets even more complicated; so I'm not going to go there today. |
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retsof
Former Community Advisor USA Joined: Jul 31, 2005 Post Count: 6824 Status: Offline Project Badges: 
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100,000 PCs running for a year would do it.
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
There's been past discussion in estimating flops/iops on the fora which petered out. BOINCstats publishes a number for WCG, but only for BOINC. Look for threads where e.g. Blue Gene of bluegene is mentioned and who knows someone 'foreign' typed it as blue jean.
----------------------------------------Confused: From Confucius.... he's responsible for this word and global affliction. At any rate, knock yourself out. May the best wo-man win.
WCG
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David Autumns
Ace Cruncher UK Joined: Nov 16, 2004 Post Count: 11062 Status: Offline Project Badges:
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Hi TrevHCS
----------------------------------------suffice to say that we were running so close to the raw number crunching power of Blue Gene/L that IBM have had to up the ante  We recently peaked at 210 years per day which if your average PC CPU Core chucks out 3GFlops that's 210*365*3Gflops - give or take 230TFlops But to complicate matters still further each work unit gets crunched a minimum of 3 times (unless it's a HPF2 to which I'm totally confused) so maybe 70Tflops is there or thereabouts for the current real number crunching power of the WCG Together we do a full 24 hours of 1 PC crunching away in less than 1.2 seconds  But the best thing about this Free SuperComputer apart from the Friends you can make around the globe is that even with a static number of members (which it hasn't) it would get quicker every day as we collectively upgrade our individual PC's How cool is that?  Dave  [Edit 1 times, last edit by David Autumns at Jul 12, 2007 8:44:58 PM] |
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TrevHCS
Cruncher UK Joined: May 17, 2007 Post Count: 2 Status: Offline Project Badges:
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Right, I think I understand it enough to explain it to anyone who needs to know even if the maths goes over my head... :)
Thanks for the clarification. Maybe I do need to upgrade after all. Trev |
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