== sanity test 101b: check stride-io mode read-ahead =========================================================================== 23:42:44 (1787110964)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.841274s, 4.55587MB/s
Read-ahead success for size 8192

1.775604s, 4.72437MB/s
Read-ahead success for size 16384

1.880837s, 4.46004MB/s
Read-ahead success for size 32768

2.049772s, 4.09246MB/s
Read-ahead success for size 65536

2.092516s, 4.00886MB/s
Read-ahead success for size 131072

2.294801s, 3.65548MB/s
Read-ahead success for size 262144

1.167042s, 7.18792MB/s
Read-ahead success for size 524288

1.560879s, 5.37428MB/s
Read-ahead success for size 1048576