== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:14:23 (1780334063)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.749888s, 4.7938MB/s
Read-ahead success for size 8192

1.523288s, 5.50691MB/s
Read-ahead success for size 16384

2.169699s, 3.86625MB/s
Read-ahead success for size 32768

1.534095s, 5.46812MB/s
Read-ahead success for size 65536

1.633214s, 5.13626MB/s
Read-ahead success for size 131072

1.232727s, 6.80492MB/s
Read-ahead success for size 262144

1.239497s, 6.76775MB/s
Read-ahead success for size 524288

0.993893s, 8.44015MB/s
Read-ahead success for size 1048576