== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:00:08 (1789059608)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.771465s, 4.73541MB/s
Read-ahead success for size 8192

2.464623s, 3.40361MB/s
Read-ahead success for size 16384

2.431697s, 3.44969MB/s
Read-ahead success for size 32768

1.935661s, 4.33372MB/s
Read-ahead success for size 65536

1.839228s, 4.56094MB/s
Read-ahead success for size 131072

1.792390s, 4.68012MB/s
Read-ahead success for size 262144

1.330607s, 6.30435MB/s
Read-ahead success for size 524288

1.548424s, 5.41751MB/s
Read-ahead success for size 1048576