== sanity test 101b: check stride-io mode read-ahead =========================================================================== 19:37:57 (1786750677)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.075923s, 4.04091MB/s
Read-ahead success for size 8192

1.910522s, 4.39074MB/s
Read-ahead success for size 16384

1.956679s, 4.28717MB/s
Read-ahead success for size 32768

2.212128s, 3.7921MB/s
Read-ahead success for size 65536

1.674220s, 5.01046MB/s
Read-ahead success for size 131072

1.495652s, 5.60866MB/s
Read-ahead success for size 262144

1.232561s, 6.80584MB/s
Read-ahead success for size 524288

1.324266s, 6.33453MB/s
Read-ahead success for size 1048576