[ncl-talk] 回复： Question on parallelism

[时光足迹]

Oops, sorry for not explaining well. I used task parallism shown below: 
http://www.ncl.ucar.edu/Applications/task_parallelism.shtml
Thereinto, task_parallelism_driver_3.ncl is the 'driver script', where another script is the so-call 'drived script'.
 Generally speaking, do-loop of different levels can be used directly in the 'drived script', and run this script only is OK. However, there are already too much do-loop inside the 'drived script', so I tried to use the parallism to run the script.
;--------------------
So, in the 'driver script',
do i=0,numLevs-1
command = "ncl ***.ncl " + str_get_sq() + "level=" + i + str_get_sq() + " >/dev/null"
end do

;--------------------
And, in the 'drived script',
begin   print(level)
  ...
end
;--------------------
I wonder if I explained it clearly.
Best regrads.




------------------ 原始邮件 ------------------
发件人: "Dennis Shea"<shea at ucar.edu>;
发送时间: 2020年1月20日(星期一) 晚上11:41
收件人: "时光足迹"<1072752133 at qq.com>;
抄送: "ncl-talk"<ncl-talk at ucar.edu>;
主题: Re: [ncl-talk] Question on parallelism



It is not clear what you mean by "using parallelism in NCL"
What "driver script?"
What do you mean "output to files?"


You must be much clearer in what you have done and what you want as a result.



A simple test script


   klev = 14
   ntim = 120   ; example 120 months
   nlat = 100
   mlon = 200
   u    = random_normal( 20,10,(/klev,ntim,nlat,mlon/))  
   t     = random_normal(-10, 3,(/klev,ntim,nlat,mlon/))


   U    = dim_avg_n_Wrap(u,1)
   printVarSummary(U)
   T    = dim_avg_n_Wrap(t,1)
   printVarSummary(T)
====




Variable: U
Number of Dimensions: 3
Dimensions and sizes:	[14] x [100] x [200]


Variable: T
Type: float
Total Size: 1120000 bytes
            280000 values
Number of Dimensions: 3
Dimensions and sizes:	[14] x [100] x [200]




On Sun, Jan 19, 2020 at 9:01 PM 时光足迹 via ncl-talk <ncl-talk at ucar.edu> wrote:

Hi adimistrator,
   I am using parallelism in NCL, version 6.6.2. 

   Fourteen levels of different variables, such as u(nlev,ntime,nlat,nlon), are processed, by using do-loop (do i=0,14-1) in the 'driver' script. 

   Annually average and monthly average of every variables were calculated in the 'drived' script. However only few levels are output to files.
   For example, it should get output files:
  (1) Annual-Mean-Lev0.nc  (2)Annual-Mean-Lev1.nc ... (14)Annual-Mean-Lev13.nc
   But now i only get some of these:
  (1)Annual-Mean-Lev1.nc   (2)Annual-Mean-Lev3.nc ... 

   That means some levels are missing.


   When I run the 'drived' script alone, I can get Annual-Mean-Lev2.nc successfully. 



   So I wonder why I can't get all files using parallelism(subprocess) ?
Yours,
HUNAG

   

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