== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:04:39 (1783137879)
striped dir -i1 -c2 -H fnv_1a_64  /mnt/lustre/d101b.sanity

1.763600s, 4.75653MB/s
Read-ahead success for size 8192

1.427159s, 5.87784MB/s
Read-ahead success for size 16384

1.709866s, 4.906MB/s
Read-ahead success for size 32768

2.011486s, 4.17035MB/s
Read-ahead success for size 65536

1.800205s, 4.65981MB/s
Read-ahead success for size 131072

1.401498s, 5.98546MB/s
Read-ahead success for size 262144

1.169349s, 7.17374MB/s
Read-ahead success for size 524288

0.940510s, 8.91921MB/s
Read-ahead success for size 1048576