== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:33:15 (1787315595)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.667168s, 5.03165MB/s
Read-ahead success for size 8192

1.901880s, 4.41069MB/s
Read-ahead success for size 16384

1.682454s, 4.98594MB/s
Read-ahead success for size 32768

1.826521s, 4.59267MB/s
Read-ahead success for size 65536

1.413116s, 5.93625MB/s
Read-ahead success for size 131072

1.432858s, 5.85446MB/s
Read-ahead success for size 262144

1.326388s, 6.3244MB/s
Read-ahead success for size 524288

1.252472s, 6.69764MB/s
Read-ahead success for size 1048576