== sanity test 101b: check stride-io mode read-ahead =========================================================================== 15:11:44 (1788462704)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.005866s, 4.18204MB/s
Read-ahead success for size 8192

1.651710s, 5.07874MB/s
Read-ahead success for size 16384

1.846133s, 4.54388MB/s
Read-ahead success for size 32768

1.607253s, 5.21922MB/s
Read-ahead success for size 65536

1.327331s, 6.31991MB/s
Read-ahead success for size 131072

1.426386s, 5.88102MB/s
Read-ahead success for size 262144

1.560842s, 5.37441MB/s
Read-ahead success for size 524288

1.411203s, 5.9443MB/s
Read-ahead success for size 1048576