== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:01:05 (1788465665)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.620479s, 5.17662MB/s
Read-ahead success for size 8192

1.796832s, 4.66855MB/s
Read-ahead success for size 16384

1.805548s, 4.64602MB/s
Read-ahead success for size 32768

1.275431s, 6.57708MB/s
Read-ahead success for size 65536

1.210559s, 6.92953MB/s
Read-ahead success for size 131072

1.217414s, 6.89051MB/s
Read-ahead success for size 262144

1.442839s, 5.81396MB/s
Read-ahead success for size 524288

1.173563s, 7.14798MB/s
Read-ahead success for size 1048576