== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:29:07 (1790692147)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.581274s, 5.30497MB/s
Read-ahead success for size 8192

1.515724s, 5.53439MB/s
Read-ahead success for size 16384

1.973169s, 4.25134MB/s
Read-ahead success for size 32768

1.567825s, 5.35047MB/s
Read-ahead success for size 65536

1.505418s, 5.57228MB/s
Read-ahead success for size 131072

1.426373s, 5.88108MB/s
Read-ahead success for size 262144

1.194916s, 7.02025MB/s
Read-ahead success for size 524288

1.237944s, 6.77624MB/s
Read-ahead success for size 1048576