== sanity test 101b: check stride-io mode read-ahead =========================================================================== 03:01:42 (1787468502)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.580717s, 5.30684MB/s
Read-ahead success for size 8192

1.790128s, 4.68604MB/s
Read-ahead success for size 16384

2.027400s, 4.13762MB/s
Read-ahead success for size 32768

1.582481s, 5.30092MB/s
Read-ahead success for size 65536

1.666978s, 5.03222MB/s
Read-ahead success for size 131072

1.343359s, 6.2445MB/s
Read-ahead success for size 262144

1.280467s, 6.55121MB/s
Read-ahead success for size 524288

1.391138s, 6.03003MB/s
Read-ahead success for size 1048576