A high performance computer

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simaham
Posts: 5
Joined: Mon Jul 11, 2016 12:08 pm

A high performance computer

Post by simaham » Wed Jul 20, 2016 8:15 am

Dear WRF user,

I am going to run WRF over a nested domains for 34 years
the coars domain includes 43*37 grids and the fine one includes 91*70 grids
I want to buy a new computer but I'll wonder if it will be fast enough or not, b
the computer has 2 Intel E5 2687 CPU (per CPU has 10 cores) and 4 KingStone HyperX 8 GB RAM,
could you please tell me about your computer CPU and Ram and also WRF run time.
Thanks,

Sima.

meteoadriatic
Posts: 1510
Joined: Wed Aug 19, 2009 10:05 am

Re: A high performance computer

Post by meteoadriatic » Wed Jul 20, 2016 9:01 am

Hello,

Sure any computer will be fast enough if you have enough time to wait. As you can imagine probably, this is relative issue. As your domains are pretty small, I can guess that you will be able to calculate that within one month, maybe even within several days, depending on setup. I don't think that purchasing such computer only for that task is reasonable choice. If you have time, you can easy do that with some cheap Intel I5. Of course if you will use that computer later for other tasks, go for it.

simaham
Posts: 5
Joined: Mon Jul 11, 2016 12:08 pm

Re: A high performance computer

Post by simaham » Sun Jul 31, 2016 9:05 am

Hello
Thanke you for your reply,
I have only one year to run over the domain for 31 year,
in my current computer with intel core i7, one month takes almost 4 days

meteoadriatic
Posts: 1510
Joined: Wed Aug 19, 2009 10:05 am

Re: A high performance computer

Post by meteoadriatic » Sun Jul 31, 2016 9:19 am

Are you sure you set up that optimally? Looks little bit slow to me.

simaham
Posts: 5
Joined: Mon Jul 11, 2016 12:08 pm

Re: A high performance computer

Post by simaham » Sun Jul 31, 2016 11:47 am

yes, I think so.
The coarse domain has 0.3 degree resolution, and I set time step 180 seconds

meteoadriatic
Posts: 1510
Joined: Wed Aug 19, 2009 10:05 am

Re: A high performance computer

Post by meteoadriatic » Sun Jul 31, 2016 12:56 pm

That is NMM?

simaham
Posts: 5
Joined: Mon Jul 11, 2016 12:08 pm

Re: A high performance computer

Post by simaham » Mon Aug 01, 2016 5:11 am

No it is ARW

meteoadriatic
Posts: 1510
Joined: Wed Aug 19, 2009 10:05 am

Re: A high performance computer

Post by meteoadriatic » Mon Aug 01, 2016 7:10 am

Use adaptive time step in that case. Then, maybe you can gain some speed by changing physics options to simpler ones. Also number of vertical levels influence running speed. Compiling options and compiler type also, domain decomposition, number of numtiles, and list goes on and on...

simaham
Posts: 5
Joined: Mon Jul 11, 2016 12:08 pm

Re: A high performance computer

Post by simaham » Mon Aug 01, 2016 8:33 am

Thank you for your recommendations,
I'll try them

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