== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:16:19 (1761142579)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.548956s, 15.281MB/s
Read-ahead success for size 8192

0.521546s, 16.0841MB/s
Read-ahead success for size 16384

0.591784s, 14.1751MB/s
Read-ahead success for size 32768

0.579440s, 14.4771MB/s
Read-ahead success for size 65536

0.511506s, 16.3998MB/s
Read-ahead success for size 131072

0.491255s, 17.0759MB/s
Read-ahead success for size 262144

0.452349s, 18.5445MB/s
Read-ahead success for size 524288

0.446301s, 18.7959MB/s
Read-ahead success for size 1048576