== sanity test 101b: check stride-io mode read-ahead =========================================================================== 10:05:44 (1736262344)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.067194s, 124.842MB/s
Read-ahead success for size 8192

0.052954s, 158.413MB/s
Read-ahead success for size 16384

0.053934s, 155.535MB/s
Read-ahead success for size 32768

0.074546s, 112.529MB/s
Read-ahead success for size 65536

0.061463s, 136.482MB/s
Read-ahead success for size 131072

0.071458s, 117.392MB/s
Read-ahead success for size 262144

0.066490s, 126.163MB/s
Read-ahead success for size 524288

0.059123s, 141.884MB/s
Read-ahead success for size 1048576