== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:26:47 (1741627607)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.432426s, 19.3989MB/s
Read-ahead success for size 8192

0.407407s, 20.5902MB/s
Read-ahead success for size 16384

0.425837s, 19.6991MB/s
Read-ahead success for size 32768

0.380063s, 22.0716MB/s
Read-ahead success for size 65536

0.328424s, 25.542MB/s
Read-ahead success for size 131072

0.308742s, 27.1703MB/s
Read-ahead success for size 262144

0.261133s, 32.1239MB/s
Read-ahead success for size 524288

0.243535s, 34.4452MB/s
Read-ahead success for size 1048576