.TH MPI_File_write_all_begin 3 "8/31/1998" " " "MPI-2".SH NAMEMPI_File_write_all_begin \-  Begin a split collective write using individual file pointer .SH SYNOPSIS.nf#include "mpi.h"int MPI_File_write_all_begin(MPI_File fh, void *buf, int count,                             MPI_Datatype datatype).fi.SH INPUT PARAMETERS.PD 0.TP.B fh - file handle (handle).PD 1.PD 0.TP.B buf - initial address of buffer (choice).PD 1.PD 0.TP.B count - number of elements in buffer (nonnegative integer).PD 1.PD 0.TP.B datatype - datatype of each buffer element (handle).PD 1.SH NOTES FOR FORTRANAll MPI routines in Fortran (except for 'MPI_WTIME' and 'MPI_WTICK')have an additional argument 'ierr' at the end of the argument list.'ierr' is an integer and has the same meaning as the return value ofthe routine in C.  In Fortran, MPI routines are subroutines and areinvoked with the 'call' statement.All MPI objects (e.g., 'MPI_Datatype', 'MPI_Comm', 'MPI_File') are oftype 'INTEGER' in Fortran.