Howdy Luis!
Yes, you can do that.
Whether a file is using parallel I/O is not a characteristic of the file,
it is a characteristic of how you open the file. If you open (or create)
with nc_open_par() (or nc_create_par()), then you get parallel IO.
Otherwise you get sequential IO.
You can create the file with par, and open it without parallel I/O next
time. Similarly you can take a file that is produced sequentially, and open
it for parallel I/O access.
Keep on NetCDFing!
Ed Hartnett
On Thu, Jul 19, 2018 at 9:03 AM Luis Cebamanos <l.cebamanos@xxxxxxxxxxxxx>
wrote:
> Hi all,
>
> I was wondering if a netCDF file can be created with nc_create (only one
> MPI rank) and once it is closed, open it in parallel with nc_open_par or
> in order to be used in parallel the file has to be created with
> nc_create_par.
>
> Thanks
>
>
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