[gradsusr] GrADS performance vs alternatives?

Davide Sacchetti davide.sacchetti at arpal.liguria.it
Mon Apr 11 04:33:15 EDT 2022


I see
there are different ways to produce png outputs, depending also on grads version
eg: gxprint, printim, print: you could investigate which method is faster.
when I have to produce lots of png I divide the number of png processing among the available cpus, but I immagine you already did this


On my knowledge it is difficult to read and render data from grib or netcdf faster than grads does, the only chance I imagine is to take advantage of parallelization


Davide


Dott. Davide Sacchetti
Dipartimento Stato dell’Ambiente e Tutela dai Rischi Naturali
U.O. Clima Meteo Idro
Viale Brigate Partigiane 2, 16129 Genova (I)
tel: +39 0106437535
mail: davide.sacchetti at arpal.liguria.it  web: https://www.arpal.liguria.it/homepage/meteo.html



 Da:   Brian Gaze <brianw.gaze at googlemail.com> 
 A:   <gradsusr at gradsusr.org> 
 Inviato:   08/04/2022 19:03 
 Oggetto:   [gradsusr] GrADS performance vs alternatives? 



Thanks David.


The data is stored locally on high speed SSDs.

Any tips with scripting? My professional background is software development so I'm reasonably comfortable working with grads script. However, I've not found many tweaks that make a great deal of difference in terms of performance.

Thanks


Brian




On Fri, 8 Apr 2022 at 17:08, <gradsusr-request at gradsusr.org> wrote:
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 From: Davide Sacchetti <davide.sacchetti at arpal.liguria.it>
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 Subject: Re: [gradsusr] GrADS performance vs alternatives?
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 the speed may depend on cpu but also on where your data is stored (are your datasets available locally?) and how your script is written ...
 Upon my knowloedge GrADS IS fast, it may be the fastest sw you can find everywhere ...
 Davide
 
 
 Dott. Davide Sacchetti
 Dipartimento Stato dell?Ambiente e Tutela dai Rischi Naturali
 U.O. Clima Meteo Idro
 Viale Brigate Partigiane 2, 16129 Genova (I)
 tel: +39 0106437535
 mail:?davide.sacchetti at arpal.liguria.it? web:?https://www.arpal.liguria.it/homepage/meteo.html
 
 
 
  Da:   Brian Gaze <brianw.gaze at googlemail.com> 
  A:   <gradsusr at gradsusr.org> 
  Inviato:   07/04/2022 17:07 
  Oggetto:   [gradsusr] GrADS performance vs alternatives? 
 
 
 
                  Questa ? la prima volta che ricevi un'email da questo mittente.         Assicurati che sia qualcuno di cui ti fidi.                
 Hi,
 
 
 
 I've recently started generating ECMWF 50 member ensemble plots using a GrADS script for a large latitude - longitude range. Technically it all works fine, but the issue I'm having is performance. It is dependent of course on CPU speed, but even with a very fast processor each individual graph can take approx 1.5 seconds to render and save.?
 
 
 To an extent running instances on multiple cores helps, but generating a range of graphs (e.g. 2m temps, 850hPa temps, MSLP etc...) can take a long time. Perhaps 40 mins or so for a country the size of the United Kingdom.?
 
 
 Does anyone have tips for how to optimize performance in the script? Alternatively, is there software available which runs much faster than GrADS script to do the same thing??
 
 
 Thanks
 
 
 BWG 
 
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