typestyle | Making CSS Typesafe 🌹 | Frontend Framework library

Below is a code which I think does what you want. It is based upon what you posted yesterday and then deleted - please don't do this, rather edit the question to improve it. I have also changed to using a 6x4 global size and a 3x2 process grid as rectangular grids are more likely to catch bugs.

Anyway to answer your questions

1 - You only store a part of the array locally, so the array needs to be declared as only (1:2,1:2) - this is almost the whole point of distributed memory programming, each process only holds a part of the whole data structure

2 - You only have a 2x2 array locally, so it should be a 2x2 array holding whatever data is to be stored locally. You are writing an array of integers, so I think it is simplest to say you are writing 4 integers

3 - See above - You are writing an array of integers, so I think it is simplest to say you are writing 4 integers. The filetype is (in my experience) only used in the call to MPI_File_set_view to describe the layout of the data in the file via the filetype argument. When you actually write data just tell mpi_file_write and friends what you are writing