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Re: Is the 12 Hr cut off the best limit?

Yes, we are not only in contact with academics but also with the industry. This year is going to be exciting because after working on the infrastructure for most of last year we get to harvest the results now.
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Re: Is the 12 Hr cut off the best limit?

I haven't seen anything entered for this question for a month and a half. Is anything going to be done to allow processing beyond the 12 hour limit or are the WUs going to be more restrictive so this will not be seen as a problem? After reaching 2 years of processing time, I put all of my resources on DDDT2 since there have been problems getting enough work for that project to reach the 2 year goal. I did get there and now, with problems getting work for DDDT2, I am putting my emphasis on faah. I would really prefer to do this for CEP2 if the 12 hour cut off can be bypassed. I had also read, somewhere, that the requirement for replication (to reduce pending validation) might be reduced of eliminated. Any news on this?
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Re: Is the 12 Hr cut off the best limit?

I don't believe the 12 hour 'limit' is so much a limit but just a stopping point to gather the data. In other words your work will not be lost if you take longer than 12 hours, you will not be denied wu's if your processor did take longer and you will still get credit for your crunching and the results will still be useful.

Also, FWIW I have seen many times a unit will stop in the 6 or 7 hour range because it is seeing that there is no more 'useful' computation to be done for that chunk, and it moves on. The 12 hour thing is not especially 'significant' to validity or worth, if that makes sense. All your computations whether you worked it 4 hours or 12 hours still provide useful valid data they can use.

If you are worried about being able to get work to keep your processors gainfully employed, I do not see this 12 hour thing as any issue at all with it. Besides for the occasional server hiccup, I have always seen work issued when I have requested it.

I have one compy running now that's a horrible old dog that I probably should have put out in the field and shot years ago but even that one, regurgitates units that are satisfactory for the project. The 12 hours really isn't an issue to worry about IMO.

Aaron
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Re: Is the 12 Hr cut off the best limit?

Although it is true that you will not lose credit for processor time up to the 12 hour cut off, only a subset of the 16 jobs executed for the WU will be executed. I have many examples of this occurring starting with job 12 or later. If I wish to let the additional processing time be used to fully complete the WU, I want to be able to do that. I would suggest reading all the posts for this issue to see what has been said.
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armstrdj
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Re: Is the 12 Hr cut off the best limit?

dkt,

We are working on the change to extend the cutoff time. There are a couple of other items ahead in the queue. I would not expect the cutoff extension to be in beta any earlier than the end of the month.

Thanks,
armstrdj
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gb009761
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Re: Is the 12 Hr cut off the best limit?

Thanks armstrdj for keeping us in the loop.
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Re: Is the 12 Hr cut off the best limit?

We are working on the change to extend the cutoff time. There are a couple of other items ahead in the queue. I would not expect the cutoff extension to be in beta any earlier than the end of the month.

Thanks,
armstrdj

Thank you for letting us know the status of this. I had one other question about any changes to the amount of replication for this project; any news on this?
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Re: Is the 12 Hr cut off the best limit?

Dear dkt,
we have been working on the in-house validation a bit but other more pressing things have come up and need to be sorted out first. We'll keep the forum posted on how this is going.
Best wishes from
Your Harvard CEP team
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Re: Is the 12 Hr cut off the best limit?

Can someone explain the 12 hour cutoff to me?

Does each WU have a certain number of things it needs to compute or does it just run for a certain amount of time like Rosetta@home and just computes more and more runs in that time?

What happens after the computer hits the 12 hours? I just noticed that on my old p4 machine all the WU hit the 12 hour cutoff. What does that mean exactly?
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Re: Is the 12 Hr cut off the best limit?

Hi NewtonianRefractor,
sorry for the late reply - busy times in the lab ;). Please check out this post and the follow-ups we posted in this thread (under user name cleanenergy).
http://www.worldcommunitygrid.org/forums/wcg/viewthread_thread,30547#307466
This should clear things up. If there are questions left, please let us know.
Best wishes
Your Harvard CEP team
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