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World Community Grid Forums
Category: Active Research
Forum: Mapping Cancer Markers Forum
Thread: Much Longer WUs |
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Thread Status: Active Total posts in this thread: 61
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Sgt.Joe
Ace Cruncher USA Joined: Jul 4, 2006 Post Count: 7696 Status: Offline Project Badges: 
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It is those long units which the calculations in BOINC off. IT will adjust itself in a few days. I have had some of the 24+ hour unitsshow 3 to 4 hours left almost for the entire duration of the unit. However the calculation is done for these is wildly inaccurate.
----------------------------------------Cheers
Sgt. Joe
*Minnesota Crunchers* |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
It appears the under-estimates were all in one largish batch of MCM tasks. One task ran slightly past deadline, and things should now settle down. Should be back to normal by 4th October... [phew]
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l_mckeon
Senior Cruncher Joined: Oct 20, 2007 Post Count: 439 Status: Offline Project Badges: 
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@ Sgt Joe No, with the times bouncing around, the BOINC estimates are ALWAYS off. When they finally catch up to the 9 hour tasks, a number of 2.5 hour tasks will show up and disrupt everything again.
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Sgt.Joe
Ace Cruncher USA Joined: Jul 4, 2006 Post Count: 7696 Status: Offline Project Badges:
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@ Sgt Joe No, with the times bouncing around, the BOINC estimates are ALWAYS off. When they finally catch up to the 9 hour tasks, a number of 2.5 hour tasks will show up and disrupt everything again. Well, I somewhat agree with you. My point was that the greater the disparity in actual unit length, the greater the disparity will be in the estimating process for upcoming units. On one machine I have units ranging in length from 30+hours to 1/2 hour. Until those disparities get smaller, all of the initial estimates and all of the running estimates bear no resemblance to reality. Should the length of the work units stabilize, I would expect the estimates to become somewhat realistic. I keep a short cache (.5 days) so always have work, but don't get overwhelmed in the case that I get a rash of short units which trigger numerous additional units to be sent which may be much greater in length. Cheers
Sgt. Joe
*Minnesota Crunchers* |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Yep -- I was being overly optimistic when I said it was just the one batch. After the first task of the next batch went through only 50% over, it has gone back to 20-30x estimate. I may have to abort tasks and shorten the cache again.
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Barnsley_Tatts
Senior Cruncher Joined: Nov 3, 2005 Post Count: 281 Status: Offline Project Badges: 
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10 October. Some mahoosive WUs kicking about. Everyone today has been >5 hours in duration, thats on my i7 desktop
----------------------------------------I've 2 WUs waiting to run, with a guestimate time of >7 & >8 hours respectively. How people cope when they crunch on mobile devices or laptops heaven knows! It's a pity that WUs can't be 'designed' to complete in under 3 hours. I suspect lots of crunchers get fed up, and just abort the longer WUs.  |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
What batch is this? Had 35 plus of 8117 that ran 4:39 to 4:42 hours. The 8139 seem to be heading for 5:30.
The time projects of ready to start work is severely borked. The prediction is 3:58 hours for two dozen buffered 8139, which is kind of what the 8090 ran 2 days ago. |
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Barnsley_Tatts
Senior Cruncher Joined: Nov 3, 2005 Post Count: 281 Status: Offline Project Badges:
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8148 will complete in around 5 hours.
----------------------------------------I have a 7952 resend which is showing 8:12, but like you say, projects of ready to start work is severely borked! 8152 showing 7:37. |
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KLiK
Master Cruncher Croatia Joined: Nov 13, 2006 Post Count: 3108 Status: Offline Project Badges: 
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So? Just leave them be...all is OK!
----------------------------------------Those that won't get calculated, will be deleted by BOINC...it's an automatic process! Go find the next machine to install to... :D |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
10 October. Some mahoosive WUs kicking about. Everyone today has been >5 hours in duration, thats on my i7 desktop I've 2 WUs waiting to run, with a guestimate time of >7 & >8 hours respectively. I have an older CPU (Core 2 Quad) and never saw a WU take more than 4 hours. Maybe caused by compiler differences? You can see my computer here: http://lhcathomeclassic.cern.ch/sixtrack/show_host_detail.php?hostid=10337303 [Edit 3 times, last edit by Former Member at Oct 11, 2014 5:41:23 PM] |
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