== sanity test 101b: check stride-io mode read-ahead =========================================================================== 23:42:34 (1789357354)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.651532s, 12.8752MB/s
Read-ahead success for size 8192

0.658391s, 12.7411MB/s
Read-ahead success for size 16384

0.732685s, 11.4491MB/s
Read-ahead success for size 32768

0.683212s, 12.2782MB/s
Read-ahead success for size 65536

0.632911s, 13.254MB/s
Read-ahead success for size 131072

0.626281s, 13.3943MB/s
Read-ahead success for size 262144

0.606977s, 13.8203MB/s
Read-ahead success for size 524288

0.482285s, 17.3935MB/s
Read-ahead success for size 1048576