== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:35:32 (1715574932)
striped dir -i1 -c2 -H all_char /mnt/lustre/d101b.sanity

9.195299s, 0.912271MB/s
Read-ahead success for size 8192

8.556993s, 0.980322MB/s
Read-ahead success for size 16384

8.363576s, 1.00299MB/s
Read-ahead success for size 32768

8.163430s, 1.02758MB/s
Read-ahead success for size 65536

8.084472s, 1.03762MB/s
Read-ahead success for size 131072

7.910212s, 1.06048MB/s
Read-ahead success for size 262144

7.640934s, 1.09785MB/s
Read-ahead success for size 524288

7.002330s, 1.19797MB/s
Read-ahead success for size 1048576