== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:06:44 (1785949604)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.536550s, 3.30709MB/s
Read-ahead success for size 8192

2.836243s, 2.95765MB/s
Read-ahead success for size 16384

3.286227s, 2.55266MB/s
Read-ahead success for size 32768

3.411801s, 2.4587MB/s
Read-ahead success for size 65536

2.822490s, 2.97206MB/s
Read-ahead success for size 131072

2.250301s, 3.72777MB/s
Read-ahead success for size 262144

1.940638s, 4.3226MB/s
Read-ahead success for size 524288

1.709088s, 4.90824MB/s
Read-ahead success for size 1048576