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#include <testphdf5.h>
#define DIM 2
#define SIZE 32
#define NUMITEMS 500 /* 988 */
void multiple_dset_write(char *filename)
{
int i, j, nprocs, rank;
hid_t iof, plist, dataset, memspace, filespace;
hssize_t chunk_origin [DIM];
hsize_t chunk_dims [DIM], file_dims [DIM];
double outme [SIZE][SIZE];
MPI_Comm_rank (MPI_COMM_WORLD, &rank);
MPI_Comm_size (MPI_COMM_WORLD, &nprocs);
VRFY((nprocs <= SIZE), "nprocs <= SIZE");
chunk_origin [0] = 0;
chunk_origin [1] = rank * (SIZE / nprocs);
chunk_dims [0] = SIZE;
chunk_dims [1] = SIZE / nprocs;
for (i = 0; i < DIM; i++)
file_dims [i] = SIZE;
for (i = 0; i < SIZE; i++)
for (j = 0; j < SIZE; j++)
outme [i][j] = rank;
plist = H5Pcreate (H5P_FILE_ACCESS);
H5Pset_fapl_mpio(plist, MPI_COMM_WORLD, MPI_INFO_NULL);
iof = H5Fcreate (filename, H5F_ACC_TRUNC, H5P_DEFAULT, plist);
H5Pclose (plist);
memspace = H5Screate_simple (DIM, chunk_dims, NULL);
filespace = H5Screate_simple (DIM, file_dims, NULL);
H5Sselect_hyperslab (filespace, H5S_SELECT_SET, chunk_origin, NULL, chunk_dims
, NULL);
for (i = 0; i < NUMITEMS; i++) {
char dname [100];
sprintf (dname, "dataset %d", i);
dataset = H5Dcreate (iof, dname, H5T_NATIVE_FLOAT, filespace, H5P_DEFAULT);
VRFY((dataset > 0), "dataset create succeeded");
H5Dwrite (dataset, H5T_NATIVE_DOUBLE, memspace, filespace, H5P_DEFAULT, outme);
H5Dclose (dataset);
if (! ((i+1) % 10)) {
printf("created %d datasets\n", i+1);
MPI_Barrier(MPI_COMM_WORLD);
}
}
H5Sclose (filespace);
H5Sclose (memspace);
H5Fclose (iof);
}
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