NAME

       MPI_File_sync - Makes semantics consistent for data-access operations (collective).

SYNTAX

C Syntax

       #include <mpi.h>
       int MPI_File_sync(MPI_File fh)

Fortran Syntax

       USE MPI
       ! or the older form: INCLUDE 'mpif.h'
       MPI_FILE_SYNC(FH, IERROR)
            INTEGER   FH, IERROR

Fortran 2008 Syntax

       USE mpi_f08
       MPI_File_sync(fh, ierror)
            TYPE(MPI_File), INTENT(IN) :: fh
            INTEGER, OPTIONAL, INTENT(OUT) :: ierror

C++ Syntax

       #include <mpi.h>
       void MPI::File::Sync()

INPUT PARAMETER

       fh        File handle (handle).

OUTPUT PARAMETER

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       Calling  MPI_File_sync  with fh causes all previous writes to fh by the calling process to
       be written to permanent storage.  If  other  processes  have  made  updates  to  permanent
       storage,  then  all  such  updates become visible to subsequent reads of fh by the calling
       process.

       MPI_File_sync is a collective operation. The user is responsible  for  ensuring  that  all
       nonblocking  requests  on  fh have been completed before calling MPI_File_sync. Otherwise,
       the call to MPI_File_sync is erroneous.

ERRORS

       Almost all MPI routines return an error value; C routines as the value of the function and
       Fortran  routines in the last argument. C++ functions do not return errors. If the default
       error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then  on  error  the  C++  exception
       mechanism will be used to throw an MPI::Exception object.

       Before  the  error value is returned, the current MPI error handler is called. For MPI I/O
       function errors, the default error handler is set to MPI_ERRORS_RETURN. The error  handler
       may    be   changed   with   MPI_File_set_errhandler;   the   predefined   error   handler
       MPI_ERRORS_ARE_FATAL may be used to  make  I/O  errors  fatal.  Note  that  MPI  does  not
       guarantee that an MPI program can continue past an error.