== sanity test 101b: check stride-io mode read-ahead =========================================================================== 22:14:44 (1788747284)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.503266s, 5.58026MB/s
Read-ahead success for size 8192

2.234904s, 3.75345MB/s
Read-ahead success for size 16384

2.124116s, 3.94922MB/s
Read-ahead success for size 32768

1.651057s, 5.08075MB/s
Read-ahead success for size 65536

1.955269s, 4.29026MB/s
Read-ahead success for size 131072

1.750587s, 4.79188MB/s
Read-ahead success for size 262144

1.243119s, 6.74803MB/s
Read-ahead success for size 524288

1.954945s, 4.29097MB/s
Read-ahead success for size 1048576