== sanity test 101b: check stride-io mode read-ahead =========================================================================== 04:17:08 (1789546628)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

0.644497s, 13.0157MB/s
Read-ahead success for size 8192

0.606760s, 13.8252MB/s
Read-ahead success for size 16384

0.683178s, 12.2788MB/s
Read-ahead success for size 32768

0.699564s, 11.9912MB/s
Read-ahead success for size 65536

0.572260s, 14.6587MB/s
Read-ahead success for size 131072

0.543720s, 15.4282MB/s
Read-ahead success for size 262144

0.555850s, 15.0915MB/s
Read-ahead success for size 524288

0.507670s, 16.5237MB/s
Read-ahead success for size 1048576