[MITgcm-support] pickup after changing number of processors

[Yuan Lian]

Hi David,

You don't need to use pickupStrictlyMatch=.FALSE. to increase number of 
processors.
When you change number of processors, make sure the total number of points
in longitude and latitude unchanged. For instance, Nx=sNx*nSx*nPx, if nPx
is doubled, sNx will be reduced to half of the original value (assuming 
you use
same number of tiles).

After modifying SIZE.h, you will need to recompile the code. Make sure 
the number of
physical processors you are using matches nPx*nPy. For example, if nPx=8 
and nPy=2,
you need 16 processors. Hope this helps.

Yuan


David Hebert wrote:
> I have more processors available during the middle of a run. So I 
> changed SIZE.h accordingly and resubmitted. I get the error message in 
> STDERR.0000, but the simulation seems to be running...
>
> PID.TID 0000.0001) *** ERROR *** S/R EEBOOT_MINIMAL: No. of processes 
> not equal to nPx*nPy   256 128
>
> Since simulation seems to be running, is this something I need to be 
> concerned with? Do I need to specify pickupStrictlyMatch=.FALSE. in 
> data file in order to use the increase in processors?
>
> Thanks
>
> David
>
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