== sanity test 101b: check stride-io mode read-ahead =========================================================================== 23:15:33 (1735100133)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

6.745354s, 1.24361MB/s
Read-ahead success for size 8192

8.218776s, 1.02066MB/s
Read-ahead success for size 16384

7.715486s, 1.08724MB/s
Read-ahead success for size 32768

9.147823s, 0.917006MB/s
Read-ahead success for size 65536

7.351115s, 1.14113MB/s
Read-ahead success for size 131072

9.257573s, 0.906135MB/s
Read-ahead success for size 262144

8.526336s, 0.983847MB/s
Read-ahead success for size 524288

7.266992s, 1.15434MB/s
Read-ahead success for size 1048576