== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:48:21 (1788360501)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

0.648478s, 12.9358MB/s
Read-ahead success for size 8192

0.666673s, 12.5828MB/s
Read-ahead success for size 16384

0.688002s, 12.1927MB/s
Read-ahead success for size 32768

0.660505s, 12.7003MB/s
Read-ahead success for size 65536

0.608314s, 13.7899MB/s
Read-ahead success for size 131072

0.577617s, 14.5228MB/s
Read-ahead success for size 262144

0.520347s, 16.1212MB/s
Read-ahead success for size 524288

0.541624s, 15.4879MB/s
Read-ahead success for size 1048576