== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:36:14 (1790735774)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.779628s, 4.71369MB/s
Read-ahead success for size 8192

1.921132s, 4.36649MB/s
Read-ahead success for size 16384

2.163617s, 3.87712MB/s
Read-ahead success for size 32768

1.987814s, 4.22002MB/s
Read-ahead success for size 65536

1.569068s, 5.34624MB/s
Read-ahead success for size 131072

1.393563s, 6.01954MB/s
Read-ahead success for size 262144

1.202367s, 6.97675MB/s
Read-ahead success for size 524288

1.324232s, 6.3347MB/s
Read-ahead success for size 1048576