== sanity test 101b: check stride-io mode read-ahead =========================================================================== 23:24:28 (1735100668)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

5.681552s, 1.47646MB/s
Read-ahead success for size 8192

4.321429s, 1.94117MB/s
Read-ahead success for size 16384

3.831680s, 2.18928MB/s
Read-ahead success for size 32768

4.174352s, 2.00956MB/s
Read-ahead success for size 65536

4.265806s, 1.96648MB/s
Read-ahead success for size 131072

3.835242s, 2.18724MB/s
Read-ahead success for size 262144

4.220921s, 1.98739MB/s
Read-ahead success for size 524288

3.906987s, 2.14708MB/s
Read-ahead success for size 1048576