== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:32:53 (1748989973)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.067815s, 123.698MB/s
Read-ahead success for size 8192

0.090744s, 92.4426MB/s
Read-ahead success for size 16384

0.065159s, 128.741MB/s
Read-ahead success for size 32768

0.050043s, 167.628MB/s
Read-ahead success for size 65536

0.051311s, 163.486MB/s
Read-ahead success for size 131072

0.049932s, 168.001MB/s
Read-ahead success for size 262144

0.053173s, 157.761MB/s
Read-ahead success for size 524288

0.054861s, 152.907MB/s
Read-ahead success for size 1048576