== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:25:06 (1788283506)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.681071s, 4.99004MB/s
Read-ahead success for size 8192

1.357071s, 6.18141MB/s
Read-ahead success for size 16384

2.352795s, 3.56538MB/s
Read-ahead success for size 32768

2.080065s, 4.03286MB/s
Read-ahead success for size 65536

1.349225s, 6.21735MB/s
Read-ahead success for size 131072

0.944013s, 8.88611MB/s
Read-ahead success for size 262144

1.094191s, 7.66649MB/s
Read-ahead success for size 524288

1.314151s, 6.38329MB/s
Read-ahead success for size 1048576