Hello Wei-king, No luck there, still the same error. I'll ping our computer folks again. Luke On Tue, Nov 1, 2016 at 10:10 AM, Wei-keng Liao <[email protected]

wrote:

Hi, Luke

Could you try the attached program and run by adding "lustre:" prefix to the filename? I.e. mpiexec -n 2 a.out lustre:/path/to/Lustre/testfile

This checks whether the Intel MPI calls the Lustre driver correctly.

Wei-keng

On Nov 1, 2016, at 10:00 AM, Luke Van Roekel wrote:

...

Thanks Rob, no luck with the mpi_info object and our computing folks are not willing to set the necessary option. Do you know why this is specific to intel-mpi? Openmpi has no issue. Our HPC people thought the MPI_File_write_at_all always requires a file lock, but openmpi seems to be fine.

On Tue, Nov 1, 2016 at 8:42 AM, Rob Latham <[email protected]> wrote:

On 10/31/2016 11:47 PM, Luke Van Roekel wrote: Hello,

I've been trying to compile and run a very simple mpi test on our cluster with intel-mpi and openmpi. The test program is below. When I run with openmpi everything is fine. When I run with intel-mpi, I receive the following error

This requires fcntl(2) to be implemented. As of 8/25/2011 it is not. Generic MPICH Message: File locking failed in ADIOI_Set_lock(fd 6,cmd F_SETLKW/7,type F_WRLCK/1,whence 0) with return value FFFFFFFF and errno

...

- If the file system is NFS, you need to use NFS version 3, ensure that the lockd daemon is running on all the machines, and mount the directory with the 'noac' option (no attribute caching).

- If the file system is LUSTRE, ensure that the directory is mounted with the 'flock' option.

ADIOI_Set_lock:: Function not implemented

ADIOI_Set_lock:offset 0, length 4

your site administrator needs to enable fcntl locking with the 'flock'

mount option .

...

You can try disabling data sieving: you would create an MPI_Info object

and add the key "romio_ds_write" with the value "disable"

...

==rob

Any thoughts on how to proceed? The size/format of the file read in seems to make no difference.

Regards, Luke

#include <stdio.h>

#include <stdlib.h>

#include <mpi.h>

int main(int argc, char **argv) {

int buf, err;

MPI_File fh;

MPI_Status status;

MPI_Init(&argc, &argv);

if (argc != 2) {

printf("Usage: %s filename\n", argv[0]);

MPI_Finalize();

return 1;

}

err = MPI_File_open(MPI_COMM_WORLD, argv[1], MPI_MODE_CREATE |

MPI_MODE_RDWR, MPI_INFO_NULL, &fh);

if (err != MPI_SUCCESS) printf("Error: MPI_File_open()\n");

err = MPI_File_write_all(fh, &buf, 1, MPI_INT, &status);

if (err != MPI_SUCCESS) printf("Error: MPI_File_write_all()\n");

MPI_File_close(&fh);

MPI_Finalize();

return 0;

}

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