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USA
Advanced Cruncher Joined: Nov 22, 2004 Post Count: 107 Status: Offline |
HI
Snagged from the UD site: "Expected runtime is 20 hours per work unit give or take. Timeouts are 2weeks for cpu time and 3 weeks for wall clock time." I have 11 AMDs at or over 2200MHz Some are going 6 Hrs, and 2 may take over 30! Calibrations simply can not be made using the work units, on the performances of our PCs, or the WCG Client. It takes what it takes for each protein. ![]() Robert |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I have 11 AMDs at or over 2200MHz Some are going 6 Hrs, and 2 may take over 30! I only have three machines plugging away at this, ranging from a PIII 850 to a PIV 2.4. (somehow my slowest macine seems to get the largest WU's..). Right now it looks like the slowest machine is going to take about 190 hrs. to complete the job it is on now. I am not concerned, my machines all run 24/7 anyway and this does not seem to slow me down much on my work. Maybe they (the great powers above) could make it easy to dump big work units and send them back to the server in a different section, that user takes a 10% penality on their next unit and let others pick up the large WU's and get a "bonus" of 10% or so if they choose to go for large WU's. If I was only running one machine, I could see getting a bit disheartened over large WU's. As it is, I just figure a large WU will finish "some day". Since this is a long term project, I do not worry about the project finishing before a long WU is done..... even though it seems like it might. Now to throw this on a P200 MMX machine.... it is working anyway as a small file server.... |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
It seems like nearly everyone is whinning about how long a WU is...
How many times does it need to be explained, they can't predict how long it will be, hence this program even started in the first place! A protien can fold in many different ways, billions. Or hardly any. It's why they stuck this out on the grid mostly due to the near random length of time it takes to proccess each WU. Sending back partial data is a huge waste of resources, their recources which means it's just not going to happen. People with some idea of the workings behind grid processing would understand that having to send back partial data, tracking it and its progress then sending it back out for someone else to try and crunch, them getting impatient and sending back yet more partial data, etc etc. Just isn't worth it. It's more efficient for everyone if you just left your slow system crunching away at that protien till it finishes. However, saying that. It would be nice if the stats updated more frequently, such as at every 10% incriment of the WU you would recieve your already earned points. I think this would satisfy people alot more (and stop alot of this whinning). Even though their PC is still chipping away at a week long WU, they're getting points every day for the CPU hours expended. Far as I could find, the points are pretty much bassed on how much CPU time you've donated along with how many WU's you send back. The longer the CPU time for a WU, the more points you get. So really, a WU that's going to take 100's of hours is going to reward you more in points than doing 10 in half the time. As a reference of comparison, I have a P4 @ 3.2 and a P3 @ 800mhz. The P4 sent back 3 results within 12 hours, the P3 send back 1 result in 2 days! But I got 870 points from the P3's single WU and only 234 points from the P4's 3 results!!! |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Perhaps future projects (other than this protein folding) will have work units that are more predictable and can be made smaller. Once more projects start happening, you'll be able to pick which ones you want to participate in.
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
If you set your drive size smaller in device manager you will get smaller work units. For some reason I'm getting download speeds reminiscent of my old 2800baud modem so i droped my device drive size smaller, at 2GB device size i seem to get WU's that I complete in about 13-20 hours (with p4 2.53). I imagine if I set drive size to 4Gb i would probably get 26-40 hour WU's. But then it would take me a week to download them.
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Alther
Former World Community Grid Tech United States of America Joined: Sep 30, 2004 Post Count: 414 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
If you set your drive size smaller in device manager you will get smaller work units. For some reason I'm getting download speeds reminiscent of my old 2800baud modem so i droped my device drive size smaller, at 2GB device size i seem to get WU's that I complete in about 13-20 hours (with p4 2.53). I imagine if I set drive size to 4Gb i would probably get 26-40 hour WU's. But then it would take me a week to download them. This is theoretically true if this project actually used that much disk space, but this project uses only a few MB, so changing your disk allocation will have no effect on what size work units you will receive. You just happen to get work units that are folding quickly. Also, there is not really any such thing as "large" and "small" work units. The work units themselves differ in size by only a few hundred K. Some work units are harder to fold than others and these typically take longer. Also, the computation is non-deterministic so it's very possible that work unit A with a sequence length of 100 will take 4 hours and work unit B with a sequence length of 100 will take 30 hours. Same "size" work unit, completely different amount of time to compute.
Rick Alther
Former World Community Grid Developer |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Ok thanks for the enlightenment, now can you help me find out why it's takeing me hours to download a 3meg file from the server and then eventualy timing out and having to start over? I have cable modem and while I know my speeds can vary there is no reason for me to have problems fetching a 3mb file, should take seconds not hours. In fact for the first few days it did now though I have not gotten a new WU in almost 3 days!!!
I posted in Member-Member help forum and only got one response of someone telling me that cable was eratic in speed, while this is true to some extent, the diference between 1000mbps and 2000mbps is not enough to affect the download times of a 3meg file. Help please if this is not fixed soon I'm just going to give up. |
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David Autumns
Ace Cruncher UK Joined: Nov 16, 2004 Post Count: 11062 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Thanks for the feedback Rick.
----------------------------------------If there's no such thing as a big or a small work unit as the process is non-deterministic, what causes the progress bar to increment like it does? How does the system know that you have completed 50% for instance? What has been completed when the progess bar adds another .4% to your progess? You know where I'm coming from due to my earlier post in this thread and in my "How many proteins are contained in one Work Unit?" question in member to member support Regards Dave ![]() |
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Ben Pont
Cruncher Joined: Nov 24, 2004 Post Count: 4 Status: Offline |
Hopefully, the satisfaction will come from knowing that the unused CPU cycles, plus the passage of time that were formerly going to waste are now chipping away at complex problems that will benefit society as a whole. I don't think users are meant to impatiently stare at the progress bar. It's meant to simply run in the background quietly while you go about your business. If you want computer-driven excitement, there are other programs / websites for that.
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
well I am very happy ...I have no internet on my studenthome so work units of 6 hr like on grid.org are too quick done
so this is good |
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