== sanity test 101b: check stride-io mode read-ahead =========================================================================== 05:00:20 (1715331620)
striped dir -i1 -c2 -H all_char /mnt/lustre/d101b.sanity

7.934597s, 1.05722MB/s
Read-ahead success for size 8192

7.955277s, 1.05447MB/s
Read-ahead success for size 16384

8.437442s, 0.994212MB/s
Read-ahead success for size 32768

7.687318s, 1.09123MB/s
Read-ahead success for size 65536

10.578026s, 0.793022MB/s
Read-ahead success for size 131072

20.334400s, 0.412533MB/s
Read-ahead success for size 262144

8.977910s, 0.934361MB/s
Read-ahead success for size 524288

8.394773s, 0.999266MB/s
Read-ahead success for size 1048576