== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:58:42 (1782928722)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

0.558243s, 15.0268MB/s
Read-ahead success for size 8192

0.598190s, 14.0233MB/s
Read-ahead success for size 16384

0.649223s, 12.921MB/s
Read-ahead success for size 32768

0.655176s, 12.8036MB/s
Read-ahead success for size 65536

0.549960s, 15.2531MB/s
Read-ahead success for size 131072

0.520137s, 16.1277MB/s
Read-ahead success for size 262144

0.483512s, 17.3493MB/s
Read-ahead success for size 524288

0.471762s, 17.7814MB/s
Read-ahead success for size 1048576