== sanity test 101b: check stride-io mode read-ahead =========================================================================== 05:50:42 (1726825842)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

12.213499s, 0.686831MB/s
Read-ahead success for size 8192

11.656113s, 0.719675MB/s
Read-ahead success for size 16384

10.851397s, 0.773044MB/s
Read-ahead success for size 32768

11.056732s, 0.758688MB/s
Read-ahead success for size 65536

10.301646s, 0.814298MB/s
Read-ahead success for size 131072

9.672177s, 0.867293MB/s
Read-ahead success for size 262144

9.139082s, 0.917883MB/s
Read-ahead success for size 524288

8.601926s, 0.975201MB/s
Read-ahead success for size 1048576