== sanity test 101b: check stride-io mode read-ahead =========================================================================== 13:45:39 (1786038339)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

3.177962s, 2.63962MB/s
Read-ahead success for size 8192

2.068967s, 4.05449MB/s
Read-ahead success for size 16384

1.695819s, 4.94664MB/s
Read-ahead success for size 32768

2.775875s, 3.02197MB/s
Read-ahead success for size 65536

1.824562s, 4.5976MB/s
Read-ahead success for size 131072

1.558398s, 5.38284MB/s
Read-ahead success for size 262144

1.641621s, 5.10995MB/s
Read-ahead success for size 524288

1.307058s, 6.41793MB/s
Read-ahead success for size 1048576