== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:09:08 (1785758948)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.093882s, 4.00625MB/s
Read-ahead success for size 8192

3.033359s, 2.76545MB/s
Read-ahead success for size 16384

2.956240s, 2.83759MB/s
Read-ahead success for size 32768

3.264589s, 2.56958MB/s
Read-ahead success for size 65536

3.026456s, 2.77176MB/s
Read-ahead success for size 131072

2.642731s, 3.17422MB/s
Read-ahead success for size 262144

1.247711s, 6.7232MB/s
Read-ahead success for size 524288

1.683818s, 4.9819MB/s
Read-ahead success for size 1048576