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-rw-r--r--perform/pio_perf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/perform/pio_perf.c b/perform/pio_perf.c
index a47e6ee..8ba1567 100644
--- a/perform/pio_perf.c
+++ b/perform/pio_perf.c
@@ -1117,7 +1117,7 @@ parse_command_line(int argc, char *argv[])
cl_opts->h5_alignment = 1; /* No alignment for HDF5 objects by default */
cl_opts->h5_threshold = 1; /* No threshold for aligning HDF5 objects by default */
cl_opts->h5_use_chunks = FALSE; /* Don't chunk the HDF5 dataset by default */
- cl_opts->h5_no_fill = FALSE; /* Write fill values by default */
+ cl_opts->h5_no_fill = TRUE; /* Write fill values by default */
cl_opts->h5_write_only = FALSE; /* Do both read and write by default */
cl_opts->h5_use_mpi_posix = FALSE; /* Don't use MPI-posix VFD for HDF5 I/O by default */
cl_opts->verify = FALSE; /* No Verify data correctness by default */