[OMPI users] 2 GB limitation of MPI_File_write_all

[Eric Chamberland]

Hi,

I get this error when trying to write 360 000 000 000 MPI_LONG:
with Openmpi-1.4.5:
ERROR Returned by MPI_File_write_all: 35
ERROR_string Returned by MPI_File_write_all: MPI_ERR_IO: input/output error

with Openmpi-1.6.2:
ERROR Returned by MPI_File_write_all: 13
ERROR_string Returned by MPI_File_write_all: MPI_ERR_ARG: invalid 
argument of some other kind

First, the error in 1.6.2 seems to be less usefull to understand what 
happened for the user...

Second, am I wrong to try to write that much MPI_LONG?  Is this 
limitation documented or to be fixed?

Thanks,

Eric

=====================================================
Here is the code:

#include <stdio.h>
#include "mpi.h"

int main (int argc, char *argv[])
{
    MPI_Datatype filetype;
    MPI_File     fh;
    long        *local_array;
    MPI_Status   status;

    MPI_Init( &argc, &argv );

    int nb_proc = 0;
    MPI_Comm_size( MPI_COMM_WORLD, &nb_proc );
    if (nb_proc != 1) {
      printf( "Test code for 1 process!\n" );
      MPI_Abort( MPI_COMM_WORLD, 1 );
    }
    int size=90000000*4;
    local_array = new long[size];

    MPI_File_open(MPI_COMM_WORLD, "2.6Gb",
      MPI_MODE_CREATE | MPI_MODE_WRONLY,
      MPI_INFO_NULL, &fh);

    int ierr = MPI_File_write_all(fh, local_array, size, MPI_LONG, 
&status);
    if (ierr != MPI_SUCCESS) {
      printf("ERROR Returned by MPI_File_write_all: %d\n",ierr);
      char* lCharPtr = new char[MPI_MAX_ERROR_STRING];
      int lLongueur = 0;
      MPI_Error_string(ierr,lCharPtr, &lLongueur);
      printf("ERROR_string Returned by MPI_File_write_all: %s\n",lCharPtr);
      MPI_Abort( MPI_COMM_WORLD, 1 );
    }

    MPI_File_close(&fh);

    MPI_Finalize();
    return 0;
}

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