Coordinates for benchmark_large

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afernandezody
Posts: 32
Joined: Sat Mar 07, 2020 12:00 am

Coordinates for benchmark_large

Post by afernandezody » Mon May 24, 2021 9:01 pm

Hello,
I downloaded the file from https://www2.mmm.ucar.edu/wrf/src/bench ... rge.tar.gz. As it doesn't have the 'wps' file, I was wondering if the coordinates are available (here my assumption is that it uses a Lambert projection). Thanks.

kwerner
Posts: 2428
Joined: Wed Feb 14, 2018 9:21 pm

Re: Coordinates for benchmark_large

Post by kwerner » Wed May 26, 2021 10:50 pm

Hi,
I believe that is one of our older benchmarks. If you are interested in seeing the new ones, using V4.2.2, they can be found here.

Either way, you should be able to use the command:

Code: Select all

ncdump -h <file_name>.nc
on one of the netcdf output files and it should provide all the details of the dimensions, map projection, etc.
NCAR/MMM

afernandezody
Posts: 32
Joined: Sat Mar 07, 2020 12:00 am

Re: Coordinates for benchmark_large

Post by afernandezody » Wed May 26, 2021 11:31 pm

Hi,
I'm mainly using IDV for postprocessing and the metadata (tab) also provides those details (what was I thinking?). Regarding the benchmarks, I'm a bit confused. The link is taken from the BAMS article preprint so I guess that these are the new preferred benchmarks (better running a few hours than 6 minutes). However, this brings 2 questions:
1 - Is there any more info about the HW than 'it was run on a HPC''? This doesn't provide any info for evaluating other systems because one doesn't really know what is the comparison with.
2 - On a minor note, this was run with GFS data (analysis) not NAM. Interesting, any specific reason or was it simply a choice?
Thanks.

kwerner
Posts: 2428
Joined: Wed Feb 14, 2018 9:21 pm

Re: Coordinates for benchmark_large

Post by kwerner » Wed May 26, 2021 11:35 pm

Hi,
Can you point me to the BAMS article you're referencing?
NCAR/MMM

afernandezody
Posts: 32
Joined: Sat Mar 07, 2020 12:00 am

Re: Coordinates for benchmark_large

Post by afernandezody » Thu May 27, 2021 12:41 am

Cloud Computing Efforts for the Weather ... {early Online Release so I'm not sure if this is the final version}

kwerner
Posts: 2428
Joined: Wed Feb 14, 2018 9:21 pm

Re: Coordinates for benchmark_large

Post by kwerner » Fri May 28, 2021 9:09 pm

Thank you. I wanted to make sure that was the paper you were referring to, as others have likely done similar things. To get back to your questions:
1) The paper mentions that we used the NCAR HPC, named Cheyenne. You can find information about the specifics of that here.
2) GFS is the input data we typically use for any sort of teaching and/or testing. We have shown reasonable results with it in the past and it's easy to obtain for the entire globe. The testing done here was not for checking the validity of output, compared to observations, but to simply test the timing of the NCAR HPC vs. AWS; therefore the input data type should not make a difference.
NCAR/MMM

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