== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:01:41 (1777024901)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.544419s, 15.4084MB/s
Read-ahead success for size 8192

0.533545s, 15.7224MB/s
Read-ahead success for size 16384

0.608361s, 13.7889MB/s
Read-ahead success for size 32768

0.631581s, 13.2819MB/s
Read-ahead success for size 65536

0.471318s, 17.7982MB/s
Read-ahead success for size 131072

0.429931s, 19.5115MB/s
Read-ahead success for size 262144

0.491719s, 17.0598MB/s
Read-ahead success for size 524288

0.481149s, 17.4345MB/s
Read-ahead success for size 1048576