== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:08:45 (1787843325)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.249533s, 3.72904MB/s
Read-ahead success for size 8192

2.045181s, 4.10165MB/s
Read-ahead success for size 16384

2.773314s, 3.02476MB/s
Read-ahead success for size 32768

2.557138s, 3.28047MB/s
Read-ahead success for size 65536

1.574096s, 5.32916MB/s
Read-ahead success for size 131072

0.864889s, 9.69906MB/s
Read-ahead success for size 262144

1.118733s, 7.49831MB/s
Read-ahead success for size 524288

1.523306s, 5.50684MB/s
Read-ahead success for size 1048576