== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:58:42 (1781240322)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.547592s, 5.42043MB/s
Read-ahead success for size 8192

1.785930s, 4.69705MB/s
Read-ahead success for size 16384

1.793667s, 4.67679MB/s
Read-ahead success for size 32768

1.500096s, 5.59205MB/s
Read-ahead success for size 65536

1.440062s, 5.82517MB/s
Read-ahead success for size 131072

1.585262s, 5.29162MB/s
Read-ahead success for size 262144

1.228519s, 6.82823MB/s
Read-ahead success for size 524288

1.301646s, 6.44462MB/s
Read-ahead success for size 1048576