== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:24:17 (1790681057)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.847751s, 4.5399MB/s
Read-ahead success for size 8192

1.901303s, 4.41203MB/s
Read-ahead success for size 16384

1.474242s, 5.69012MB/s
Read-ahead success for size 32768

2.220966s, 3.77701MB/s
Read-ahead success for size 65536

1.230892s, 6.81506MB/s
Read-ahead success for size 131072

1.615609s, 5.19223MB/s
Read-ahead success for size 262144

1.331663s, 6.29935MB/s
Read-ahead success for size 524288

1.250523s, 6.70808MB/s
Read-ahead success for size 1048576