2008 Unidata NetCDF Workshop for Developers and Data Providers > Parallel I/O with NetCDF
13.5 Using Parallel I/O in NetCDF-4
How to actually use parallel I/O in netCDF-4.
- Special nc_create_par and nc_open_par functions are used to
create/open a netCDF file. The files they open are normal
NetCDF-4/HDF5 files, but these functions also take MPI paramters.
- The parallel access associated with these functions is not a
characteristic of the data file, but the way it was opened. The data
file is the same, but using the parallel open/create function allows
parallel I/O to take place.
EXTERNL int
nc_create_par(const char *path, int cmode, MPI_Comm comm, MPI_Info info,
int *ncidp);
EXTERNL int
nc_open_par(const char *path, int mode, MPI_Comm comm, MPI_Info info,
int *ncidp);
2008 Unidata NetCDF Workshop for Developers and Data Providers > Parallel I/O with NetCDF
