== sanity test 101b: check stride-io mode read-ahead =========================================================================== 18:36:31 (1784586991)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.792316s, 4.68032MB/s
Read-ahead success for size 8192

1.500237s, 5.59152MB/s
Read-ahead success for size 16384

1.728649s, 4.8527MB/s
Read-ahead success for size 32768

1.573174s, 5.33228MB/s
Read-ahead success for size 65536

1.398328s, 5.99903MB/s
Read-ahead success for size 131072

1.086250s, 7.72254MB/s
Read-ahead success for size 262144

0.813063s, 10.3173MB/s
Read-ahead success for size 524288

1.170246s, 7.16824MB/s
Read-ahead success for size 1048576