== sanity test 101b: check stride-io mode read-ahead =========================================================================== 19:40:53 (1763340053)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

1.753222s, 4.78468MB/s
Read-ahead success for size 8192

1.215330s, 6.90233MB/s
Read-ahead success for size 16384

1.431578s, 5.85969MB/s
Read-ahead success for size 32768

1.623297s, 5.16764MB/s
Read-ahead success for size 65536

1.287145s, 6.51722MB/s
Read-ahead success for size 131072

1.125829s, 7.45105MB/s
Read-ahead success for size 262144

1.389114s, 6.03882MB/s
Read-ahead success for size 524288

0.925477s, 9.06409MB/s
Read-ahead success for size 1048576