== sanity test 101b: check stride-io mode read-ahead =========================================================================== 04:31:59 (1747211519)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.335717s, 24.9871MB/s
Read-ahead success for size 8192

0.328123s, 25.5654MB/s
Read-ahead success for size 16384

0.356057s, 23.5597MB/s
Read-ahead success for size 32768

0.316775s, 26.4813MB/s
Read-ahead success for size 65536

0.272399s, 30.7953MB/s
Read-ahead success for size 131072

0.277718s, 30.2055MB/s
Read-ahead success for size 262144

0.241107s, 34.7921MB/s
Read-ahead success for size 524288

0.232045s, 36.1508MB/s
Read-ahead success for size 1048576