== sanity test 101b: check stride-io mode read-ahead =========================================================================== 12:35:53 (1785947753)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.640506s, 3.17689MB/s
Read-ahead success for size 8192

2.746868s, 3.05388MB/s
Read-ahead success for size 16384

2.924079s, 2.8688MB/s
Read-ahead success for size 32768

3.620304s, 2.3171MB/s
Read-ahead success for size 65536

1.637746s, 5.12204MB/s
Read-ahead success for size 131072

1.471340s, 5.70134MB/s
Read-ahead success for size 262144

0.843634s, 9.94342MB/s
Read-ahead success for size 524288

0.618261s, 13.5681MB/s
Read-ahead success for size 1048576