== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:27:03 (1777422423)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.666637s, 12.5835MB/s
Read-ahead success for size 8192

0.660004s, 12.7099MB/s
Read-ahead success for size 16384

0.641486s, 13.0768MB/s
Read-ahead success for size 32768

0.579313s, 14.4803MB/s
Read-ahead success for size 65536

0.491715s, 17.0599MB/s
Read-ahead success for size 131072

0.455333s, 18.423MB/s
Read-ahead success for size 262144

0.468109s, 17.9202MB/s
Read-ahead success for size 524288

0.475190s, 17.6532MB/s
Read-ahead success for size 1048576