== sanity test 101b: check stride-io mode read-ahead =========================================================================== 14:11:43 (1788804703)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

2.100955s, 3.99276MB/s
Read-ahead success for size 8192

2.707015s, 3.09884MB/s
Read-ahead success for size 16384

2.612671s, 3.21074MB/s
Read-ahead success for size 32768

2.573017s, 3.26022MB/s
Read-ahead success for size 65536

2.392255s, 3.50657MB/s
Read-ahead success for size 131072

2.072579s, 4.04742MB/s
Read-ahead success for size 262144

2.028597s, 4.13518MB/s
Read-ahead success for size 524288

2.025906s, 4.14067MB/s
Read-ahead success for size 1048576