== sanity test 101b: check stride-io mode read-ahead =========================================================================== 12:33:13 (1744129993)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.379563s, 22.1007MB/s
Read-ahead success for size 8192

0.362422s, 23.146MB/s
Read-ahead success for size 16384

0.391325s, 21.4364MB/s
Read-ahead success for size 32768

0.363594s, 23.0714MB/s
Read-ahead success for size 65536

0.314084s, 26.7082MB/s
Read-ahead success for size 131072

0.313359s, 26.77MB/s
Read-ahead success for size 262144

0.277926s, 30.1829MB/s
Read-ahead success for size 524288

0.277761s, 30.2008MB/s
Read-ahead success for size 1048576