ClimatePrediction.net on the BBC...

From the seti home page:

February 14, 2006
BOINC and Climateprediction.net have joined forces with the BBC to launch a new experiment, a full simulation of climate change from 1920 to 2080, described on a BBC television documentary Meltdown (BBC-4, February 20th, for UK BOINCers). SETI@home participants can attach to http://bbc.cpdn.org (be warned that a 160-year climate simulation is a long workunit even by Climateprediction.net's extravagant standards).
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Enfield said:
I just tried this and it will takes like years to complete one thing (unit?). Trying rosetta instead.
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There is a deadline of a year on the work units.

My lappy is currently 18.07% through a sulphur model after 304:13:19 CPU time... only 1657:23:20 to go....
 
Enfield said:
I just tried this and it will takes like years to complete one thing (unit?). Trying rosetta instead.
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It seems like a long time, but I believe you get credit in dribs and drabs rather than waiting till the entire WU is completed.
 
Just installed this :)

Looking reasonably good, and AFAIK it's the first BOINC project to actually use the graphics card to display the graphics (if you're that way inclined).

2150hrs to go :eek:
 
What's the reason for having such long WUs? Is there not a generational system whereby a simulation is begun by one user, turned in, and finished by another or others. A system like that would make it similar to FAH's work distribution. How large in terms of bytes are the WUs? Is the long processing time meant to compensate for large download size?
 
BillytheImpaler said:
What's the reason for having such long WUs? Is there not a generational system whereby a simulation is begun by one user, turned in, and finished by another or others. A system like that would make it similar to FAH's work distribution. How large in terms of bytes are the WUs? Is the long processing time meant to compensate for large download size?
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The WU isn't a section of data to be analysed by the project code in the same way that SETI, folding etc is. Instead a CP.net WU is a complete full scale meterological model run with specific parameters. It's related (ie so close it's written in FORTRAN) to the met office's weather model code that runs on their super computers.

Hence the processing power required per WU for CP.net is far higher than the other data analysis projects. This is why the disc space used to record the model state for each commit is larger than a simple analysis WU.

My current sulphur WU is up to 1.5Gb of disc used which is expected as the old hd3sm slab model used ~750Mb IIRC.

Distributing a run over computers isn't feasable due to the maths needing to access data from all over the model (even with a cellular model).
 
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Fillado said:
Just installed this :)

Looking reasonably good, and AFAIK it's the first BOINC project to actually use the graphics card to display the graphics (if you're that way inclined).

2150hrs to go :eek:
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Using the graphic or the graphical screensaver CP.net will kill the crunching performance as there's quite a bit of maths and processing to visualise the model.
 
Sounds good - very impressive to see the BBC pushing this kind of thing. I find it a little strange that everyone is concerned about how long the model takes to run - why is that important?!
 
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