== sanity test 101b: check stride-io mode read-ahead =========================================================================== 14:30:53 (1780338653)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.774991s, 4.726MB/s
Read-ahead success for size 8192

1.586645s, 5.28701MB/s
Read-ahead success for size 16384

1.856652s, 4.51814MB/s
Read-ahead success for size 32768

1.868205s, 4.4902MB/s
Read-ahead success for size 65536

1.362606s, 6.1563MB/s
Read-ahead success for size 131072

1.091176s, 7.68768MB/s
Read-ahead success for size 262144

1.201916s, 6.97936MB/s
Read-ahead success for size 524288

1.261394s, 6.65027MB/s
Read-ahead success for size 1048576