== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:08:09 (1747825689)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.053451s, 156.94MB/s
Read-ahead success for size 8192

0.054222s, 154.709MB/s
Read-ahead success for size 16384

0.051638s, 162.45MB/s
Read-ahead success for size 32768

0.049690s, 168.819MB/s
Read-ahead success for size 65536

0.052456s, 159.917MB/s
Read-ahead success for size 131072

0.053383s, 157.14MB/s
Read-ahead success for size 262144

0.050681s, 165.518MB/s
Read-ahead success for size 524288

0.053248s, 157.538MB/s
Read-ahead success for size 1048576