== sanity test 101b: check stride-io mode read-ahead =========================================================================== 15:18:23 (1789499903)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.512273s, 5.54702MB/s
Read-ahead success for size 8192

1.081878s, 7.75375MB/s
Read-ahead success for size 16384

1.519492s, 5.52067MB/s
Read-ahead success for size 32768

1.404877s, 5.97106MB/s
Read-ahead success for size 65536

1.161028s, 7.22516MB/s
Read-ahead success for size 131072

1.522397s, 5.51013MB/s
Read-ahead success for size 262144

1.287926s, 6.51327MB/s
Read-ahead success for size 524288

0.830982s, 10.0948MB/s
Read-ahead success for size 1048576