== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:16:50 (1788920210)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.350212s, 6.21281MB/s
Read-ahead success for size 8192

1.415466s, 5.92639MB/s
Read-ahead success for size 16384

1.549036s, 5.41537MB/s
Read-ahead success for size 32768

1.608047s, 5.21664MB/s
Read-ahead success for size 65536

1.233467s, 6.80084MB/s
Read-ahead success for size 131072

0.967027s, 8.67464MB/s
Read-ahead success for size 262144

1.073470s, 7.81448MB/s
Read-ahead success for size 524288

1.237076s, 6.781MB/s
Read-ahead success for size 1048576