== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:26:06 (1788614766)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.237502s, 3.7491MB/s
Read-ahead success for size 8192

2.111954s, 3.97197MB/s
Read-ahead success for size 16384

1.949738s, 4.30243MB/s
Read-ahead success for size 32768

1.996706s, 4.20122MB/s
Read-ahead success for size 65536

2.201433s, 3.81052MB/s
Read-ahead success for size 131072

2.108906s, 3.97771MB/s
Read-ahead success for size 262144

1.686972s, 4.97258MB/s
Read-ahead success for size 524288

1.899079s, 4.4172MB/s
Read-ahead success for size 1048576