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Former Member
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30 hours to process??

Recently put a 3rd computer to use. The first two are getting projects that are estimated to take 3-6 hours, generally. The third computer was given one assignment that was projected to take 30 hours! And a second project that was estimated at 24 hours!

So after days of crunching, the first project is completed with 32 hours logged. And the result shows there's an error. Is this really any surprise? Far easier to correct an error in a small project. Little bites work well. All that happened here is a waste of 32 hours.

The second project turned up "Inconclusive."

Is there any way to specify only 3-5 hours per project?
[Jun 5, 2008 7:32:30 AM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: 30 hours to process??

What kind of machine is it taking 30+ hours to run on? What kind of processor, memory, etc...
I have an older dual processor AMD Athlon machine that I am on right now, and the FAAH jobs have been stating the "To Completion" times of 20+ hours, but the jobs usually finish in around 12-15 hours. If it is an older machine you are using, you might want to consider adding in your preferences the Rice project that just opened in mid May. Those jobs run 8 hours no matter what. Other than the Rice jobs your best bet would be to run the DDDT jobs. Those seem to finish quickest on my oldest machines. The FAAH and HPF2 jobs are monsters on my older computers. I just recently lost a pair of Pentium 4s and haven't had the time to try to bring them back to life, and those were my oldest.
If you are running an older P4 or even P3 processors, you should probably stop and weigh how efficient the machine is (i.e. how much power it is consuming) versus how much work is getting done. Every little bit helps, but it's probably not the "green" thing to do for some of these older machines.
[Jun 5, 2008 10:52:41 AM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: 30 hours to process??

Ahhh... I didn't know that each research project was set up differently with regard to processing time being divvied out. I found out about the World Community Grid in an article about the Rice in USA Today a couple weeks ago and signed up. I saw all the other projects available and added those, too. First running on on a MacBook Pro, 2.16 GHz Intel Core Duo. Then added a second computer. Lastly added the slowest, which is a G4 PowerMac, 1.5 GHz single processor with 2 GB RAM and 20 GB available disk space running MAC OS 10.4.11. All results on all computers were "Valid" until yesterday, when I saw the "Error."

Wasn't even thinking of energy consumed. I adjusted pref's like bumping up processor percentage from 60% to 75%. Not sure how all the other settings, like memory and download/upload, affect what occurs.

Thank you.
[Jun 5, 2008 2:09:35 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: 30 hours to process??

Hello DGA Director,
'processor percentage' is a heat control measure for laptops. It decides how many seconds (out of 10 seconds) the CPU will run. 50% will run 1 second on, 1 second off. 75% will run 7 seconds on, 3 seconds off. I use a desktop so I run mine at 100%.

Lawrence
[Jun 5, 2008 7:59:22 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: 30 hours to process??

Actually, I'm seeing the same thing, and on several machines at once. Two of them are P4 processors and they still run out to 20 hours or more and then get an "error" rather than completion. The older P3 processors take even longer but come to the same conclusion. These are Linux machines.

All the failing results are FA@H units. This began around May 23-25.
[Jun 6, 2008 3:03:40 PM]   Link   Report threatening or abusive post: please login first  Go to top 
Sekerob
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Re: 30 hours to process??

If the below graph is a reference, take your mean run time and multiply by the average change between May 23 and a few days ago. According the data job this went from 8.035 hours and topping out at 12.041 hours i.e. 50%. So a machine doing normally 20 would have them doing about 30 hours.


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[Edit 1 times, last edit by Sekerob at Jun 8, 2008 2:36:45 PM]
[Jun 6, 2008 3:10:51 PM]   Link   Report threatening or abusive post: please login first  Go to top 
KerSamson
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Re: 30 hours to process??

Hello everybody,
indeed several FA@H WUs have been announced (and needed) far more than 24 hours (some other 30 hours) even if the host is operated by P4 with 3 GHz.
For my taste, it is a little bit too long; especially if the WU fails.
Anyway I hope that the techs are still doing a good job and that we will not waste time and energy.
Have a good time,
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[Jun 8, 2008 2:25:12 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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Re: 30 hours to process??

The problem with long computation times is strictly related to the complexity of the ligand to be docked into the HIV protein.

Generally, ligands crunched with FA@H tend to be "hits", potentially active molecules that can be further optimized and made more complex to become a lead compound (the grandparent of the final drug). These hits does not require too much time due to the relatively simple molecular structure.

Some of current experiments involves ligands bigger than usual hits, and most likely the long times you noticed are related to them. The molecules showed an interesting activity, then the reason to further investigate on their interactions. Unfortunately small increase of structural complexity can easily lead to big increase in computational time.

Concerning the errors, it would be interesting to have some information on jobs id's so we can try to figure out which issue is responsable of calculation failure.


Hope this helps,


Stefano
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[Edit 1 times, last edit by Former Member at Jun 9, 2008 11:34:16 PM]
[Jun 9, 2008 11:19:37 PM]   Link   Report threatening or abusive post: please login first  Go to top 
KerSamson
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Re: 30 hours to process??

Hi,
regarding some failed WUs, here is the most recent failure (the earlier failures are not available anymore on WCG) I've noticed during the last days:
faah4104_LpvA_Npl3_MIN2_xmd06320_03_0-- (host: WinXP Pro SP2, Q6600).
Error message: "too many normally harmless exit(s)".
I hope that it can help.
Cheers,
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[Jun 16, 2008 3:10:11 PM]   Link   Report threatening or abusive post: please login first  Go to top 
Sekerob
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Re: 30 hours to process??

Was it just one result? If you have many "Error message: "too many normally harmless exit(s)".", time to look if something is interfering, security software the most obvious item to look at.
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[Jun 16, 2008 3:22:14 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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