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New users increase but results are decreasing.

According to this page locate on this site:

http://www.worldcommunitygrid.org/stat/global.html

It appears that the number of work units being returned is actually decreasing.

Why is this?
Are the work units being changed to need a longer amount of processing time?
Is this because they can not handle the amount of data being returned so quickly?

[Nov 22, 2004 10:44:25 PM]

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Re: New users increase but results are decreasing.

Or is it because a lot of workunits are aborted before they are completed?
Just have a look around in the forums.

[Nov 22, 2004 10:51:06 PM]

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Re: New users increase but results are decreasing.

Yes, that makes sense.

I did not know the problem was of such magnitude.

After doing a quick analysis it appears that this problem is occuring with a very large percentage of the users.
Perhaps between 2000 to 4000 users.

[Nov 22, 2004 11:02:40 PM]

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Re: New users increase but results are decreasing.

As I've predicted, people are dropping out of the program because WCG was not prepared for the influx of new users, users are becoming frustrated with the software, and thus dropping out of the project. It makes total sense and if WCG hopes to keep us and hopes to make things better than they ought to response publically soon, as it could turn into a press nightmare for them very soon.

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[Nov 23, 2004 2:04:00 AM]

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Re: New users increase but results are decreasing.

If the 2000-4000 numbers you predicted are true, then it seems highly unlikely that all of the 117 work-units that were causing problems would be assigned to those people. Wonder if the problem isn't of a bigger magnitude :(

[Nov 23, 2004 2:16:41 AM]

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Re: New users increase but results are decreasing.

Yes. A careful study of the global statistics page makes it obvious that there was indeed >25% decrease of completed units when compared with the increase of new users and the history pattern of previous results. I'm telling you there was at least 2000 people effected.

It is my belief that they are processing units more than once as a measure for error control.

For instance, if your machine returns a different result than my machine for the same unit, then there is likely a problem and they would both in turn be flushed or compared against a third machines results.

This still doesn't account for the large dicrepancy of the 117 units that they are claiming, unless they have it set to use 20 machines per each unit, which is doubtful.

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[Nov 23, 2004 2:42:02 AM]

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Re: New users increase but results are decreasing.

um,... well.. from the history pages.. my last unit was returned some 70 hrs ago.. and I can also say my last work unit ran for some 60 hrs before completing.... The protine my machine is working on now indicates it should be done in about 5.5 hrs... so perhaps it's possible many folks have got some of these harder protines that require some significant folding... which could account for why the results being returned are droping off... just a possibility.

[Nov 23, 2004 2:50:37 AM]

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Re: New users increase but results are decreasing.

Well, then it goes back to my initial post which mentions the possibility that they are using units that take longer to process, or they are making all units process differently and in such a way which inevitably takes longer.

If they have not specifically did anything of this nature, then your proposal is insignificant. It would be insignificant because it was constant throughout the history. There have always been people with units taking short times and units taking long times (of processing).
Thus, it would level out to a degree, and this is not the case.

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[Nov 23, 2004 3:14:48 AM]

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Re: New users increase but results are decreasing.

Check out this thread, looks like they are tuning the size to increase them, which could account for a percieved decrease in productivity if you're only looking at the WUs returned. Thoughts?

https://secure.worldcommunitygrid.org/forums/wcg/viewthread?thread=183

[Nov 23, 2004 3:48:04 AM]

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Re: New users increase but results are decreasing.

That makes perfect sense to me. Notice that the CPU time continued to increase even when the results decreased. My guess is that it is a combination of both the tuning to the WUs to make them take longer and the issue with the work units that kept failing.

For instance, if your machine returns a different result than my machine for the same unit, then there is likely a problem and they would both in turn be flushed or compared against a third machines results.
No Mad

Mad, I think I read somewhere on the site that WU do get processed several times from more than one user.

[Nov 23, 2004 4:06:03 AM]

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