Add new hint nc_header_collective

Parallel-NetCDF / PnetCDF

Source code repository of PnetCDF library and utilities

https://parallel-netcdf.github.io

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Closed wkliao closed 1 year ago

wkliao commented 1 year ago

Default is "false"
When it is set to "true", MPI collective reads and writes will be used for accessing file header. In this case, all processes except rank 0 will make zero sized requests.