== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:05:59 (1789265159)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.173716s, 7.14705MB/s
Read-ahead success for size 8192

1.366929s, 6.13683MB/s
Read-ahead success for size 16384

1.589727s, 5.27676MB/s
Read-ahead success for size 32768

1.583271s, 5.29828MB/s
Read-ahead success for size 65536

1.229976s, 6.82014MB/s
Read-ahead success for size 131072

1.226551s, 6.83918MB/s
Read-ahead success for size 262144

1.174890s, 7.13991MB/s
Read-ahead success for size 524288

1.129950s, 7.42388MB/s
Read-ahead success for size 1048576