== sanity test 101b: check stride-io mode read-ahead =========================================================================== 08:37:15 (1788525435)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.879423s, 4.4634MB/s
Read-ahead success for size 8192

2.146310s, 3.90839MB/s
Read-ahead success for size 16384

2.207561s, 3.79994MB/s
Read-ahead success for size 32768

2.409913s, 3.48088MB/s
Read-ahead success for size 65536

1.955917s, 4.28884MB/s
Read-ahead success for size 131072

1.473899s, 5.69144MB/s
Read-ahead success for size 262144

0.957812s, 8.75809MB/s
Read-ahead success for size 524288

1.209839s, 6.93366MB/s
Read-ahead success for size 1048576