Is your feature request related to a problem? Please describe.
In order for NetCDF-4 MPI-IO to be usable (#1405) the sub-communicators for tiles and the domain need to be easily accessible as well as MPI_INFO_NULL
Describe the solution you'd like
MPI sub-communicators accessible via getter functions for use within the fms2-io layer
Describe alternatives you've considered
System was prototyped with calls to create direct communicators.
Additional context
This feature will enable #1405 to go forward
Is your feature request related to a problem? Please describe. In order for NetCDF-4 MPI-IO to be usable (#1405) the sub-communicators for tiles and the domain need to be easily accessible as well as MPI_INFO_NULL
Describe the solution you'd like MPI sub-communicators accessible via getter functions for use within the fms2-io layer
Describe alternatives you've considered System was prototyped with calls to create direct communicators.
Additional context This feature will enable #1405 to go forward