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World Community Grid Forums
Category: Support
Forum: BOINC Agent Support
Thread: BOINC on windows - better or worse for FAAH? |
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Thread Status: Active Total posts in this thread: 4
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steffen_moeller
Cruncher Joined: Dec 3, 2005 Post Count: 44 Status: Offline |
Hello,
I just finished my first upload of a BOINC FAAH work unit from within Windows. The computation took about 18 hours. With the original WCG client it was only 12 which surprised me as I expected less overhead. Should I hence go back to the original client? Looking at the messages of the BOINC manager though I have noticed that two result files(faah0223_diversity0510_x1hwr_01_1_0, faah0223_diversity0510_x1hwr_01_1_1) where uploaded for a single BOINC WU (faah0223_diversity0510_x1hwr_01_1). I am confused now. My machine is low on memory with only 256MB (P4, 1.8GHz) and I have the impression that BOINC is less demanding (-10 MB) on it for which I would be inclined to subscribe myself to it....but not if it takes 50% more time, or is it 25% more efficient because of the apparent double submission? I am totally puzzled over this. Many thanks Steffen |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
There are two result files. UD just packages them up.
The actual computation should be almost identical. It's almost the same code in the science application. But work unit variations mean you can't compare work unit times. In fact, because different work unit batches are sent to UD and BOINC, you can never compare the same work unit on both platforms. However, I understand WCG have done these tests for us, and there is nothing in it. So, any variation is solely in the points systems. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hi Steffen --
There is essentially no difference between the applications run under the UD agent and those run under BOINC other than minor changes to allow them to run under the different agents. The two file uploads for FAAH under BOINC differs from the upload under the UD agent because BOINC does not combine the files and compress the result for transfer (some impact for you if you are on dial, but not that significant if you are on DSL or cable). While an attempt is made to keep the work units at about 10 hours for the average computer, you will often see them run in a wide range of times. My most recent work units have ranged from 4.49 hours all the way up to 9.8 hours. Your system is right on the edge in terms of having sufficient memory to run FAAH. If you are experiencing a significant paging overhead that is affecting your other work on the system, you might want to consider limiting yourself to the Human Proteome Folding project which has a smaller working set (both projects require quite a bit of memory though). Good luck with your continued crunching, |
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steffen_moeller
Cruncher Joined: Dec 3, 2005 Post Count: 44 Status: Offline |
Didactylos, Dave,
many thanks for your quick clarification. Steffen |
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