== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:19:08 (1746148748)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.882260s, 9.50809MB/s
Read-ahead success for size 8192

0.957878s, 8.75749MB/s
Read-ahead success for size 16384

1.116206s, 7.51529MB/s
Read-ahead success for size 32768

0.723036s, 11.6019MB/s
Read-ahead success for size 65536

0.649026s, 12.9249MB/s
Read-ahead success for size 131072

0.619492s, 13.5411MB/s
Read-ahead success for size 262144

0.529194s, 15.8517MB/s
Read-ahead success for size 524288

0.633542s, 13.2408MB/s
Read-ahead success for size 1048576