== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:05:32 (1786115132)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.676845s, 12.3937MB/s
Read-ahead success for size 8192

0.699178s, 11.9978MB/s
Read-ahead success for size 16384

0.741796s, 11.3085MB/s
Read-ahead success for size 32768

0.700615s, 11.9732MB/s
Read-ahead success for size 65536

0.528826s, 15.8627MB/s
Read-ahead success for size 131072

0.568031s, 14.7679MB/s
Read-ahead success for size 262144

0.500369s, 16.7648MB/s
Read-ahead success for size 524288

0.498058s, 16.8426MB/s
Read-ahead success for size 1048576