== sanity test 101b: check stride-io mode read-ahead =========================================================================== 09:45:43 (1784123143)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.565064s, 14.8454MB/s
Read-ahead success for size 8192

0.495165s, 16.941MB/s
Read-ahead success for size 16384

0.538989s, 15.5636MB/s
Read-ahead success for size 32768

0.515582s, 16.2702MB/s
Read-ahead success for size 65536

0.449511s, 18.6616MB/s
Read-ahead success for size 131072

0.426318s, 19.6769MB/s
Read-ahead success for size 262144

0.462218s, 18.1486MB/s
Read-ahead success for size 524288

0.465929s, 18.004MB/s
Read-ahead success for size 1048576