Returns MPI communicator information (REMOVED)
FUNCTION REMOVED: The C functions H5P_SET_FAPL_MPIPOSIX and H5P_GET_FAPL_MPIPOSIX and the corresponding Fortran subroutines have been removed from the HDF5 Library at Release 1.8.13. They remain available in earlier releases, through HDF5 Release 1.8.12.
All applications used with HDF5 Release 1.8.13 or later and that use MPI I/O should use the functions H5P_SET_FAPL_MPIO and H5P_GET_FAPL_MPIO or the corresponding Fortran subroutines.
While HDF5’s MPI-POSIX driver (H5P_SET_FAPL_MPIPOSIX and H5P_GET_FAPL_MPIPOSIX) once provided performance benefits on some systems, that is no longer the case. HDF5’s MPIO driver (H5P_SET_FAPL_MPIO and H5P_GET_FAPL_MPIO) now provides as good or better performance on all modern systems.
H5P_GET_FAPL_MPIPOSIX ( fapl_id, comm, use_gpfs_hints )
Fortran90 Interface: h5pget_fapl_mpiposix_f
SUBROUTINE h5pget_fapl_mpiposix_f(prp_id, comm, use_gpfs, hdferr)
INTEGER(HID_T), INTENT(IN) :: prp_id ! Property list identifier
INTEGER, INTENT(OUT) :: comm ! Buffer to return communicator
LOGICAL, INTENT(OUT) :: use_gpfs
INTEGER, INTENT(OUT) :: hdferr ! Error code
END SUBROUTINE h5pget_fapl_mpiposix_f
|IN: File access property list identifier|
|OUT: MPI-2 communicator|
|OUT: Use of GPFS hints|
If the file access property list is set to the
H5FD_MPIPOSIX driver, H5P_GET_FAPL_MPIPOSIX returns the MPI communicator through the
comm pointer, if those values are non-null.
comm is not copied, so it is valid only until the file access property list is either modified or closed.
use_gpfs_hints specifies whether to attempt to use GPFS hints when accessing this file. A value of
1 indicates that the hints are being used, where possible. A value of
0 indicates that the hints are not being used.
Returns a non-negative value if successful. Otherwise returns a negative value.
|1.8.13||C function and Fortran subroutine removed from HDF5 at this release.|
|1.6.1||Fortran subroutine introduced.|
use_gpfs_hints parameter added.
|1.6.0||C function introduced in this release.|
--- Last Modified: July 22, 2020 | 09:18 AM