== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:36:52 (1772422612)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.626481s, 13.39MB/s
Read-ahead success for size 8192

0.523765s, 16.016MB/s
Read-ahead success for size 16384

0.608477s, 13.7862MB/s
Read-ahead success for size 32768

0.532753s, 15.7458MB/s
Read-ahead success for size 65536

0.441611s, 18.9955MB/s
Read-ahead success for size 131072

0.429484s, 19.5318MB/s
Read-ahead success for size 262144

0.404335s, 20.7467MB/s
Read-ahead success for size 524288

0.432332s, 19.4032MB/s
Read-ahead success for size 1048576