== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:44:02 (1789368242)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.922088s, 9.09741MB/s
Read-ahead success for size 8192

1.006469s, 8.33469MB/s
Read-ahead success for size 16384

1.059437s, 7.91799MB/s
Read-ahead success for size 32768

0.881439s, 9.51695MB/s
Read-ahead success for size 65536

0.722112s, 11.6168MB/s
Read-ahead success for size 131072

0.699236s, 11.9968MB/s
Read-ahead success for size 262144

0.564780s, 14.8529MB/s
Read-ahead success for size 524288

0.626984s, 13.3793MB/s
Read-ahead success for size 1048576