== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:51:24 (1782730284)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.079769s, 4.03343MB/s
Read-ahead success for size 8192

1.772375s, 4.73298MB/s
Read-ahead success for size 16384

2.339641s, 3.58543MB/s
Read-ahead success for size 32768

2.726476s, 3.07672MB/s
Read-ahead success for size 65536

1.941097s, 4.32158MB/s
Read-ahead success for size 131072

1.497785s, 5.60068MB/s
Read-ahead success for size 262144

2.036756s, 4.11861MB/s
Read-ahead success for size 524288

1.670505s, 5.0216MB/s
Read-ahead success for size 1048576