== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:44:01 (1789332241)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.793762s, 10.5682MB/s
Read-ahead success for size 8192

0.682944s, 12.283MB/s
Read-ahead success for size 16384

0.802711s, 10.4503MB/s
Read-ahead success for size 32768

0.665601s, 12.6031MB/s
Read-ahead success for size 65536

0.605610s, 13.8515MB/s
Read-ahead success for size 131072

0.569287s, 14.7353MB/s
Read-ahead success for size 262144

0.542996s, 15.4487MB/s
Read-ahead success for size 524288

0.515150s, 16.2838MB/s
Read-ahead success for size 1048576