== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:18:00 (1779689880)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.409658s, 5.95081MB/s
Read-ahead success for size 8192

1.541486s, 5.4419MB/s
Read-ahead success for size 16384

1.702055s, 4.92852MB/s
Read-ahead success for size 32768

1.760048s, 4.76612MB/s
Read-ahead success for size 65536

1.541311s, 5.44251MB/s
Read-ahead success for size 131072

1.354180s, 6.1946MB/s
Read-ahead success for size 262144

1.135116s, 7.39009MB/s
Read-ahead success for size 524288

1.027550s, 8.1637MB/s
Read-ahead success for size 1048576