== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:20:57 (1786832457)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.454405s, 3.41778MB/s
Read-ahead success for size 8192

2.332803s, 3.59594MB/s
Read-ahead success for size 16384

2.630159s, 3.18939MB/s
Read-ahead success for size 32768

2.414360s, 3.47446MB/s
Read-ahead success for size 65536

1.710696s, 4.90362MB/s
Read-ahead success for size 131072

1.421408s, 5.90162MB/s
Read-ahead success for size 262144

2.090803s, 4.01215MB/s
Read-ahead success for size 524288

1.721113s, 4.87394MB/s
Read-ahead success for size 1048576