== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:06:23 (1787997983)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.552808s, 15.1745MB/s
Read-ahead success for size 8192

0.519985s, 16.1324MB/s
Read-ahead success for size 16384

0.574521s, 14.601MB/s
Read-ahead success for size 32768

0.573064s, 14.6382MB/s
Read-ahead success for size 65536

0.495961s, 16.9138MB/s
Read-ahead success for size 131072

0.416978s, 20.1176MB/s
Read-ahead success for size 262144

0.437797s, 19.161MB/s
Read-ahead success for size 524288

0.445137s, 18.845MB/s
Read-ahead success for size 1048576