1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
! Copyright by the Board of Trustees of the University of Illinois. *
! All rights reserved. *
! *
! This file is part of HDF5. The full HDF5 copyright notice, including *
! terms governing use, modification, and redistribution, is contained in *
! the files COPYING and Copyright.html. COPYING can be found at the root *
! of the source code distribution tree; Copyright.html can be found at the *
! root level of an installed copy of the electronic HDF5 document set and *
! is linked from the top-level documents page. It can also be found at *
! http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
! access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!
! Fortran parallel example. Copied from Tutorial's example program of
! dataset.f90.
PROGRAM DATASET
USE HDF5 ! This module contains all necessary modules
IMPLICIT NONE
INCLUDE 'mpif.h'
CHARACTER(LEN=10), PARAMETER :: filename = "sds.h5" ! File name
CHARACTER(LEN=8), PARAMETER :: dsetname = "IntArray" ! Dataset name
INTEGER(HID_T) :: file_id ! File identifier
INTEGER(HID_T) :: dset_id ! Dataset identifier
INTEGER(HID_T) :: filespace ! Dataspace identifier in file
INTEGER(HID_T) :: plist_id ! Property list identifier
INTEGER(HSIZE_T), DIMENSION(2) :: dimsf = (/5,8/) ! Dataset dimensions.
! INTEGER, DIMENSION(7) :: dimsfi = (/5,8,0,0,0,0,0/)
! INTEGER(HSIZE_T), DIMENSION(2) :: dimsfi = (/5,8/)
INTEGER(HSIZE_T), DIMENSION(2) :: dimsfi
INTEGER, ALLOCATABLE :: data(:,:) ! Data to write
INTEGER :: rank = 2 ! Dataset rank
INTEGER :: error, error_n ! Error flags
INTEGER :: i, j
!
! MPI definitions and calls.
!
INTEGER :: mpierror ! MPI error flag
INTEGER :: comm, info
INTEGER :: mpi_size, mpi_rank
comm = MPI_COMM_WORLD
info = MPI_INFO_NULL
CALL MPI_INIT(mpierror)
CALL MPI_COMM_SIZE(comm, mpi_size, mpierror)
CALL MPI_COMM_RANK(comm, mpi_rank, mpierror)
!
! Initialize data buffer with trivial data.
!
ALLOCATE ( data(dimsf(1),dimsf(2)))
do i = 1, dimsf(2)
do j = 1, dimsf(1)
data(j,i) = j - 1 + (i-1)*dimsf(1)
enddo
enddo
!
! Initialize FORTRAN interface
!
CALL h5open_f(error)
!
! Setup file access property list with parallel I/O access.
!
CALL h5pcreate_f(H5P_FILE_ACCESS_F, plist_id, error)
CALL h5pset_fapl_mpio_f(plist_id, comm, info, error)
!
! Create the file collectively.
!
CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error, access_prp = plist_id)
CALL h5pclose_f(plist_id, error)
!
! Create the data space for the dataset.
!
CALL h5screate_simple_f(rank, dimsf, filespace, error)
!
! Create the dataset with default properties.
!
CALL h5dcreate_f(file_id, dsetname, H5T_NATIVE_INTEGER, filespace, &
dset_id, error)
!
! Create property list for collective dataset write
!
CALL h5pcreate_f(H5P_DATASET_XFER_F, plist_id, error)
CALL h5pset_dxpl_mpio_f(plist_id, H5FD_MPIO_COLLECTIVE_F, error)
!
! For independent write use
! CALL h5pset_dxpl_mpio_f(plist_id, H5FD_MPIO_INDEPENDENT_F, error)
!
!
! Write the dataset collectively.
!
CALL h5dwrite_f(dset_id, H5T_NATIVE_INTEGER, data, dimsfi, error, &
xfer_prp = plist_id)
!
! Deallocate data buffer.
!
DEALLOCATE(data)
!
! Close resources.
!
CALL h5sclose_f(filespace, error)
CALL h5dclose_f(dset_id, error)
CALL h5pclose_f(plist_id, error)
CALL h5fclose_f(file_id, error)
!
! Close FORTRAN interface
!
CALL h5close_f(error)
CALL MPI_FINALIZE(mpierror)
END PROGRAM DATASET
|
