[CIG-GEODYN] Calypso question

[Hiroaki Matsui]

Dear Michael, 

there is a preparation to run the dynamo simulations with Calypso.

First, data files for indexing and communication table is generated by the program ‘gen_sph_grids’.
This program need a control file named ‘control_sph_shell’, which includes parallelization information.
The subdomain information is defined at ‘num_subdomain_ctl’ in ‘data_files_def’ block and
‘num_domain_ctl’ block.

The total number of subdomain is defined at ‘num_subdomain_ctl’.
I strongly recommend to set the same number for the number of ‘radial’ decomposition in
‘num_domain_sph_grid’ and ‘num_domain_legendre’.
Consequently, the number of decomposition in ‘meridional’ and ‘zonal’ are the same 
in ‘num_domain_sph_grid’ and ‘num_domain_legendre’, respectively.

Finally, products of decomposition in ‘num_domain_spectr’, ‘num_domain_legendre’, and 
'num_domain_sph_grid’ are the same as the total # of decomposition ‘num_subdomain_ctl’.

Here is an example of parallelization information in ‘ctl_sph_shell’ for 8 domains:

  begin data_files_def
    num_subdomain_ctl    8
    sph_file_prefix             'sph_lm31t48r64c_ic_8/in’    <- Any file name can be defined
  end data_files_def
!
  begin num_domain_ctl
    array num_domain_sph_grid  2
      num_domain_sph_grid   radial         2     end
      num_domain_sph_grid   meridional     4     end
    end array num_domain_sph_grid
!
    array num_domain_legendre   2
      num_domain_legendre   radial         2     end
      num_domain_legendre   zonal          4     end
    end array num_domain_legendre
!
    array num_domain_spectr     1
      num_domain_spectr      modes         8    end
    end array num_domain_spectr
  end num_domain_ctl


After generating the indexing information, you can run the dynamo simulation by the program ‘sph_mhd’.
‘sph_mhd’ needs the control file named ‘control_MHD’, and it also has the entity ‘num_subdomain_ctl’ in 
‘data_files_def’. So you need to define ‘num_subdomain_ctl’ to be 8.

Here is an example of ‘data_files_def’ block in control_MHD:
!
  begin data_files_def
    num_subdomain_ctl            8
    num_smp_ctl                  1
!
    sph_file_prefix             'sph_lm31t48r64c_ic_8/in'
!
    restart_file_prefix         'restart/rst'
    field_file_prefix           'field/out'
  end data_files_def
!

Best,
Hiro.

> 2016/03/08 14:25、Michael Andrew Calkins <michael.calkins at colorado.edu> のメール：
> 
> Hello,
> 
> I’m currently trying to run some dynamo simulations with Calypso. However, it’s not clear to me how to change the number of subdomains, and thus the number of processors. Do you possibly have any example “control” files that show this? For instance, what parameters do I need to change to run the dynamo benchmarks on 8 or 16 processors, etc. instead of 4?
> 
> Any help would be appreciated.
> 
> Michael
> 
> ***********************************************
> Michael A. Calkins
> Assistant Professor
> Department of Physics
> University of Colorado, Boulder
> email:    michael.calkins at colorado.edu <mailto:michael.calkins at colorado.edu>
> phone:  (303) 735-4853
> ***********************************************
> 
> 
> 
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