[MITgcm-support] Changing the number of cores in ECCOv4

[gael forget]

Hi Dan,
you seem to be on the right track. Unless I forget something all you want to do is indeed
- change sNx & nPx jointly, e.g., to make them 15 & 192 in http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/ECCO_v4_r2/code/SIZE.h?view=markup
- uncomment the 'blankList’ line for nprocs=192 and comment out the one for nprocs=96 in http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/ECCO_v4_r2/input/data.exch2?view=markup
Cheers,
Gael




On Dec 15, 2016, at 8:02 AM, Dan Jones <dcjones.work at gmail.com> wrote:

> Hi all,
> 
> I'm running ECCOv4, and I would like to double the number of cores.  I haven't used exch2 before, so I'm not sure how to do that.
> 
> I've read this discussion thread:
> http://mitgcm.org/pipermail/mitgcm-support/2014-December/009660.html
> 
> So I believe that I should set nPx=192 in SIZE.h, but I'm not sure what else needs to be changed.  I'm used to conserving the total number of grid points (by changing sNx and sNy), but I'm not sure how exch2 handles that.
> 
> I'm also not sure what to do in data.exch2.  I've uncommented the 'blankList' for nprocs=192 and commented out the 'blankList' for nprocs=96.  Is there anything else?
> 
> Thanks in advance, exch2 experts! 
> 
> -Dan
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> MITgcm-support at mitgcm.org
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