MPP_PREP tools deprecated in 4.2.x?

Versions v4.2.x
1

Hi all, I have started using mpp_optimiz_zoom_nc.F90 for preparing in advance best MPI distributions but found out that the code does not seem to have been updated to 4.2.x:

  • missing extended computational grid relative to input (jpiglo = Ni0glo +2 * nn_hls)
  • missing northfold treatment and east-west periodicity

Anybody already working on it?

2

Since NEMO4.0, we have implemented an automatic and optimal decomposition of the MPI sub-domains. All details are given in section 2.1 of

Irrmann, G., Masson, S., Maisonnave, É., Guibert, D., and Raffin, E.: Improving ocean modeling software NEMO 4.0 benchmarking and communication efficiency, Geoscientific Model Development, 15, 1567–1582, GMD - Improving ocean modeling software NEMO 4.0 benchmarking and communication efficiency, 2022.

Setting the namelist parameter ln_listonly = .true. will stop the model at the initialisation phase and will print in the file ocean.output the list of optimum domain decompositions from 1 MPI task to slightly more than jpni × jpnj MPI tasks.