== sanity test 101b: check stride-io mode read-ahead =========================================================================== 17:47:07 (1785966427)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.766543s, 4.7486MB/s
Read-ahead success for size 8192

1.678409s, 4.99795MB/s
Read-ahead success for size 16384

2.455833s, 3.41579MB/s
Read-ahead success for size 32768

1.710487s, 4.90422MB/s
Read-ahead success for size 65536

1.614562s, 5.19559MB/s
Read-ahead success for size 131072

1.500326s, 5.59119MB/s
Read-ahead success for size 262144

1.114477s, 7.52695MB/s
Read-ahead success for size 524288

1.002222s, 8.37001MB/s
Read-ahead success for size 1048576