== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:23:55 (1790781835)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.805739s, 4.64553MB/s
Read-ahead success for size 8192

1.915267s, 4.37986MB/s
Read-ahead success for size 16384

1.725525s, 4.86148MB/s
Read-ahead success for size 32768

2.170457s, 3.8649MB/s
Read-ahead success for size 65536

1.920536s, 4.36785MB/s
Read-ahead success for size 131072

1.728218s, 4.85391MB/s
Read-ahead success for size 262144

1.758007s, 4.77166MB/s
Read-ahead success for size 524288

1.084717s, 7.73345MB/s
Read-ahead success for size 1048576