== sanity test 101b: check stride-io mode read-ahead =========================================================================== 12:21:29 (1786465289)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.527916s, 15.89MB/s
Read-ahead success for size 8192

0.586746s, 14.2968MB/s
Read-ahead success for size 16384

0.674889s, 12.4296MB/s
Read-ahead success for size 32768

0.601124s, 13.9549MB/s
Read-ahead success for size 65536

0.513650s, 16.3314MB/s
Read-ahead success for size 131072

0.477961s, 17.5508MB/s
Read-ahead success for size 262144

0.453921s, 18.4803MB/s
Read-ahead success for size 524288

0.490827s, 17.0908MB/s
Read-ahead success for size 1048576