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I downloaded my first sulphur cycle work unit.

I downloaded my first sulphur cycle work unit.

Questions and Answers : Windows : I downloaded my first sulphur cycle work unit.
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old_user93294

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Message 15536 - Posted: 30 Aug 2005, 2:16:42 UTC

The message says \"this computer is overextended and credit is being withheld pending first computer to complete the work unit\". The work unit was 4665 hours long! I do not want to work on it for months and then not get any credit for it at all.
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Profile geophi
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Message 15538 - Posted: 30 Aug 2005, 2:48:22 UTC

That seems like an extraordinary amount of time, even for a 2 GHz Celeron. It's also odd, because you are the only person running that work unit. The previous person had a failed download error.

Is it near the 10802 timestep trickle point yet?
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old_user93294

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Message 15542 - Posted: 30 Aug 2005, 10:04:34 UTC - in response to Message 15538.  

> That seems like an extraordinary amount of time, even for a 2 GHz Celeron.
> It's also odd, because you are the only person running that work unit. The
> previous person had a failed download error.
>
> Is it near the 10802 timestep trickle point yet?
>
It is now past the first trickle point and the time has decreased to 2347 hours. How do you tell where it is in the cycle? I have not completed a total work unit yet so have no clue what to expect.

Anyway, thank you...I feel much better knowing that I am the only person working on this work unit now and that it will eventually give me credit. It seems to be working properly even though it is a very...very long work unit. I will give it my best shot to get it completed before the Jan deadline.
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Message 15546 - Posted: 30 Aug 2005, 15:24:33 UTC - in response to Message 15542.  

> It is now past the first trickle point and the time has decreased to 2347
> hours. How do you tell where it is in the cycle? I have not completed a
> total work unit yet so have no clue what to expect.

That's a little more like what I'd expect in terms of time to completion with that computer.

> Anyway, thank you...I feel much better knowing that I am the only person
> working on this work unit now and that it will eventually give me credit. It
> seems to be working properly even though it is a very...very long work unit.
> I will give it my best shot to get it completed before the Jan deadline.

You have <a href="http://climateapps2.oucs.ox.ac.uk/cpdnboinc/hosts_user.php?userid=93294">credit</a> already (140 for one trickle) on that computer. And the deadline of January is not a hard deadline, at least it hasn't been in previous versions of CPDN.
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John Price
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Message 15657 - Posted: 4 Sep 2005, 6:01:14 UTC

I had a similar problem with a "sulphur cycle" work unit on my
WinXP Professional laptop.
Pentium 4 2.66Ghz

I have had problems with this box before and thought it was PC problem so reset the project.

It was running at 5.21 sec/ts. (usually around 2.9 sec/ts) and telling me that I would not make the deadline.
Is it a fact that the sulphur cycles are slower to produce?
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Les Bayliss
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Message 15659 - Posted: 4 Sep 2005, 7:28:25 UTC

Apparently, slower and longer. 5 phases instead of 3.

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crandles
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Message 15665 - Posted: 4 Sep 2005, 15:22:21 UTC
Last modified: 4 Sep 2005, 15:23:51 UTC

Most people find sulphur timesteps take about 60% longer. Comparing a fast set of parameter for slab against a slow set for sulphur could change that by a further 10%. Therefore a little suprising to see you being 80% slower.

Perhaps the parameters thing has hidden the possibility that different computers can be affected differently for a further 10% difference.

(I have been saying the model is 2.7 times longer. *1.6 for timesteps being slower and *1.67 for 5 phases instead of 3)
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John Price
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Message 15676 - Posted: 4 Sep 2005, 21:48:55 UTC - in response to Message 15665.  

&gt; Most people find sulphur timesteps take about 60% longer. Comparing a fast set
&gt; of parameter for slab against a slow set for sulphur could change that by a
&gt; further 10%. Therefore a little suprising to see you being 80% slower.
&gt;
&gt; Perhaps the parameters thing has hidden the possibility that different
&gt; computers can be affected differently for a further 10% difference.
&gt;
&gt; (I have been saying the model is 2.7 times longer. *1.6 for timesteps being
&gt; slower and *1.67 for 5 phases instead of 3)
&gt; _______________________________
&gt; Visit <a> href="http://boinc-doc.net/boinc-wiki/index.php?title=Climateprediction_FAQ"&gt;BOINC
&gt; WIKI</a> for help
&gt;
&gt; And join <a href="http://www.boincsynergy.com/">BOINC Synergy</a> for all the
&gt; news in one place.


Hmmm! Important to know!
I thought it was a machine problem so reset the project. It was showing 1900hrs to complete. After reset, a hadsm3 4.13 model is showing 690hrs for completion.
Next time I get a sulphur model I will persist.




&gt;
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Questions and Answers : Windows : I downloaded my first sulphur cycle work unit.

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