== sanity test 101b: check stride-io mode read-ahead =========================================================================== 04:43:34 (1787820214)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.893105s, 4.43114MB/s
Read-ahead success for size 8192

1.617467s, 5.18626MB/s
Read-ahead success for size 16384

2.051809s, 4.0884MB/s
Read-ahead success for size 32768

2.004759s, 4.18435MB/s
Read-ahead success for size 65536

1.386119s, 6.05187MB/s
Read-ahead success for size 131072

1.515971s, 5.53349MB/s
Read-ahead success for size 262144

1.045055s, 8.02695MB/s
Read-ahead success for size 524288

0.925573s, 9.06315MB/s
Read-ahead success for size 1048576