== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:27:19 (1722785239)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

6.386396s, 1.31351MB/s
Read-ahead success for size 8192

5.314808s, 1.57835MB/s
Read-ahead success for size 16384

4.674896s, 1.79439MB/s
Read-ahead success for size 32768

5.915294s, 1.41812MB/s
Read-ahead success for size 65536

4.788316s, 1.75189MB/s
Read-ahead success for size 131072

4.645562s, 1.80573MB/s
Read-ahead success for size 262144

4.753999s, 1.76454MB/s
Read-ahead success for size 524288

4.491818s, 1.86753MB/s
Read-ahead success for size 1048576