== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:23:06 (1786306986)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.730259s, 4.84818MB/s
Read-ahead success for size 8192

1.843219s, 4.55106MB/s
Read-ahead success for size 16384

2.080674s, 4.03168MB/s
Read-ahead success for size 32768

2.563733s, 3.27203MB/s
Read-ahead success for size 65536

1.906735s, 4.39946MB/s
Read-ahead success for size 131072

1.674239s, 5.0104MB/s
Read-ahead success for size 262144

1.674068s, 5.01091MB/s
Read-ahead success for size 524288

1.579632s, 5.31048MB/s
Read-ahead success for size 1048576