== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:32:38 (1769081558)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

1.767577s, 4.74582MB/s
Read-ahead success for size 8192

1.788916s, 4.68921MB/s
Read-ahead success for size 16384

1.533536s, 5.47011MB/s
Read-ahead success for size 32768

1.509710s, 5.55644MB/s
Read-ahead success for size 65536

1.287901s, 6.5134MB/s
Read-ahead success for size 131072

1.099634s, 7.62855MB/s
Read-ahead success for size 262144

1.067818s, 7.85584MB/s
Read-ahead success for size 524288

1.117308s, 7.50787MB/s
Read-ahead success for size 1048576