== sanity test 101b: check stride-io mode read-ahead =========================================================================== 05:00:31 (1715331631)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

9.280899s, 0.903857MB/s
Read-ahead success for size 8192

7.903930s, 1.06132MB/s
Read-ahead success for size 16384

9.729664s, 0.862168MB/s
Read-ahead success for size 32768

32.044482s, 0.26178MB/s
Read-ahead success for size 65536

15.116367s, 0.554935MB/s
Read-ahead success for size 131072

9.631791s, 0.870929MB/s
Read-ahead success for size 262144

14.310364s, 0.586191MB/s
Read-ahead success for size 524288

9.077453s, 0.924115MB/s
Read-ahead success for size 1048576