H5Pget_fapl_mpiposix
(
hid_t fapl_id
,
MPI_Comm *comm
,
hbool_t *use_gpfs_hints
)
The C functions
H5Pset_fapl_mpiposix
and H5Pset_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 H5Pset_fapl_mpio and
H5Pget_fapl_mpio
or the corresponding Fortran subroutines.
While HDF5’s MPI-POSIX driver ( H5Pset_fapl_mpiposix and H5Pget_fapl_mpiposix )
once provided performance benefits on some systems,
that is no longer the case.
HDF5’s MPIO driver
(H5Pset_fapl_mpio and H5Pget_fapl_mpio )
now provides as good or better performance on all modern systems.
|
H5FD_MPIPOSIX
driver, H5Pget_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 TRUE
(or 1
) indicates that
the hints are being used, where possible.
A value of FALSE
(or 0
) indicates that
the hints are not being used.
hid_t fapl_id |
IN: File access property list identifier. |
MPI_Comm *comm |
OUT: MPI-2 communicator. |
hbool_t *use_gpfs_hints |
OUT: Use of GPFS hints. |
SUBROUTINE h5pget_fapl_mpiposix_f(prp_id, comm, use_gpfs, hdferr) IMPLICIT NONE 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
Release | Change |
1.8.13 | C function and Fortran subroutine removed from HDF5 at this release. |
1.6.1 | Fortran subroutine introduced. |
1.6.0 | use_gpfs_hints parameter added. |
1.6.0 | C function introduced in this release. |