== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:35:54 (1786408554)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.067912s, 4.05656MB/s
Read-ahead success for size 8192

1.509051s, 5.55886MB/s
Read-ahead success for size 16384

1.862823s, 4.50317MB/s
Read-ahead success for size 32768

2.397303s, 3.49919MB/s
Read-ahead success for size 65536

1.410309s, 5.94806MB/s
Read-ahead success for size 131072

1.755994s, 4.77713MB/s
Read-ahead success for size 262144

1.461456s, 5.7399MB/s
Read-ahead success for size 524288

1.215201s, 6.90306MB/s
Read-ahead success for size 1048576