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old_user63213

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Message 31811 - Posted: 21 Dec 2007, 0:14:16 UTC

Hi
why is so big part for working 810 h , can i make smaller like 5-10 h?

Thanks
Plamen
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Les Bayliss
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Message 31812 - Posted: 21 Dec 2007, 0:57:38 UTC


These are big because they are climate models.

Anything small is already being run on the UK Met Office\'s supercomputers.
Only these big models are available here, and NO you can\'t make them smaller.

You can read about it in the first 5 sections here.


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Message 31821 - Posted: 21 Dec 2007, 13:39:57 UTC

Thanks for answer but 810H is alot
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Profile MikeMarsUK
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Message 31826 - Posted: 21 Dec 2007, 19:25:50 UTC


It\'s a lot shorter than the 160-year coupled models, those take around 2500 hours on a AMD 64, or 1800 on a Core2Duo. Some people also ran 200-year models (\'spinup\') which took that much longer.

There are currently 3 types of model you can chose between:

HadCM3 - 80 or 160 year coupled model, takes 1800-2500 hours for 160 years
HadSM3 - 72 year slab model, takes around 1/6th the time of a 160 year coupled model
HadAM3 - 1 year atmosphere model, takes slightly longer than a slab model, but needs lots of memory
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Profile mo.v
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Message 31827 - Posted: 21 Dec 2007, 19:54:38 UTC

Before you reach the end of this model, select the type you want next time in your CPDN project preferences in your account.
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Message boards : Number crunching : why is so big part for working

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