== sanity test 101b: check stride-io mode read-ahead =========================================================================== 15:30:28 (1761247828)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

1.082256s, 7.75104MB/s
Read-ahead success for size 8192

0.985154s, 8.51502MB/s
Read-ahead success for size 16384

1.026183s, 8.17457MB/s
Read-ahead success for size 32768

0.848948s, 9.88118MB/s
Read-ahead success for size 65536

0.729817s, 11.4941MB/s
Read-ahead success for size 131072

0.674372s, 12.4391MB/s
Read-ahead success for size 262144

0.656558s, 12.7766MB/s
Read-ahead success for size 524288

0.681102s, 12.3162MB/s
Read-ahead success for size 1048576