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#include "h5dsm_example.h"
#include <time.h>
#include <mpi.h>
int main(int argc, char *argv[]) {
uuid_t pool_uuid;
char *pool_grp = NULL;
hid_t file = -1, dset = -1, file_space = -1, mem_space = -1, fapl = -1;
hsize_t dims[2] = {4, 6};
hsize_t start[2], count[2];
H5VL_daosm_snap_id_t snap_id;
int buf[4][6];
int rank, mpi_size;
char *file_sel_str[2] = {"XXX...", "...XXX"};
int i, j;
(void)MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &mpi_size);
if(mpi_size > 2)
PRINTF_ERROR("mpi_size > 2\n");
/* Seed random number generator */
srand(time(NULL));
if(argc < 4 || argc > 5)
PRINTF_ERROR("argc must be 4 or 5\n");
/* Parse UUID */
if(0 != uuid_parse(argv[1], pool_uuid))
ERROR;
/* Initialize VOL */
if(H5VLdaosm_init(MPI_COMM_WORLD, pool_uuid, pool_grp) < 0)
ERROR;
/* Set up FAPL */
if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0)
ERROR;
if(H5Pset_fapl_daosm(fapl, MPI_COMM_WORLD, MPI_INFO_NULL) < 0)
ERROR;
if(H5Pset_all_coll_metadata_ops(fapl, true) < 0)
ERROR;
/* Open snapshot if specified */
if(argc == 5) {
snap_id = (H5VL_daosm_snap_id_t)atoi(argv[4]);
printf("Opening snapshot %llu\n", (long long unsigned)snap_id);
if(H5Pset_daosm_snap_open(fapl, snap_id) < 0)
ERROR;
} /* end if */
/* Open file */
if((file = H5Fopen(argv[2], H5F_ACC_RDWR, fapl)) < 0)
ERROR;
/* Open dataset */
if((dset = H5Dopen2(file, argv[3], H5P_DEFAULT)) < 0)
ERROR;
if(rank == 1)
MPI_Barrier(MPI_COMM_WORLD);
printf("---------------Rank %d---------------\n", rank);
printf("Selecting elements denoted with X\n");
printf("Memory File\n");
printf("...... %s\n", file_sel_str[rank]);
for(i = 1; i < 4; i++)
printf(".XXXX. %s\n", file_sel_str[rank]);
if(rank == 0)
MPI_Barrier(MPI_COMM_WORLD);
else
printf("Reading dataset\n");
MPI_Barrier(MPI_COMM_WORLD);
/* Set up dataspaces */
if((file_space = H5Screate_simple(2, dims, NULL)) < 0)
ERROR;
if((mem_space = H5Screate_simple(2, dims, NULL)) < 0)
ERROR;
start[0] = 0;
start[1] = 3 * rank;
count[0] = 4;
count[1] = 3;
if(H5Sselect_hyperslab(file_space, H5S_SELECT_SET, start, NULL, count, NULL) < 0)
ERROR;
start[0] = 1;
start[1] = 1;
count[0] = 3;
count[1] = 4;
if(H5Sselect_hyperslab(mem_space, H5S_SELECT_SET, start, NULL, count, NULL) < 0)
ERROR;
/* Initialize buffer */
for(i = 0; i < 4; i++)
for(j = 0; j < 6; j++)
buf[i][j] = -1;
/* Read data */
if(H5Dread(dset, H5T_NATIVE_INT, mem_space, file_space, H5P_DEFAULT, buf) < 0)
ERROR;
if(rank == 1)
MPI_Barrier(MPI_COMM_WORLD);
/* Fill and print buffer */
printf("---------------Rank %d---------------\n", rank);
printf("Successfully read data. Buffer is:\n");
for(i = 0; i < 4; i++) {
for(j = 0; j < 6; j++)
printf("%d ", buf[i][j]);
printf("\n");
}
if(rank == 0)
MPI_Barrier(MPI_COMM_WORLD);
/* Close */
if(H5Dclose(dset) < 0)
ERROR;
if(H5Fclose(file) < 0)
ERROR;
if(H5Sclose(file_space) < 0)
ERROR;
if(H5Sclose(mem_space) < 0)
ERROR;
if(H5Pclose(fapl) < 0)
ERROR;
printf("Success\n");
(void)MPI_Finalize();
return 0;
error:
H5E_BEGIN_TRY {
H5Dclose(dset);
H5Fclose(file);
H5Sclose(file_space);
H5Sclose(mem_space);
H5Pclose(fapl);
} H5E_END_TRY;
(void)MPI_Finalize();
return 1;
}
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