== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:28:44 (1770686924)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.968156s, 8.66452MB/s
Read-ahead success for size 8192

0.809840s, 10.3584MB/s
Read-ahead success for size 16384

0.865273s, 9.69475MB/s
Read-ahead success for size 32768

0.771597s, 10.8717MB/s
Read-ahead success for size 65536

0.627802s, 13.3619MB/s
Read-ahead success for size 131072

0.619657s, 13.5375MB/s
Read-ahead success for size 262144

0.592653s, 14.1543MB/s
Read-ahead success for size 524288

0.626009s, 13.4001MB/s
Read-ahead success for size 1048576