== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:48:42 (1789138122)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.980609s, 4.23537MB/s
Read-ahead success for size 8192

2.205601s, 3.80332MB/s
Read-ahead success for size 16384

2.249558s, 3.729MB/s
Read-ahead success for size 32768

1.952373s, 4.29662MB/s
Read-ahead success for size 65536

1.641842s, 5.10927MB/s
Read-ahead success for size 131072

1.872577s, 4.47971MB/s
Read-ahead success for size 262144

1.484744s, 5.64987MB/s
Read-ahead success for size 524288

1.834650s, 4.57232MB/s
Read-ahead success for size 1048576