== sanity test 101b: check stride-io mode read-ahead =========================================================================== 05:49:47 (1778924987)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

2.269474s, 3.69628MB/s
Read-ahead success for size 8192

2.454958s, 3.41701MB/s
Read-ahead success for size 16384

2.524062s, 3.32346MB/s
Read-ahead success for size 32768

1.688093s, 4.96928MB/s
Read-ahead success for size 65536

1.286610s, 6.51993MB/s
Read-ahead success for size 131072

1.204311s, 6.96548MB/s
Read-ahead success for size 262144

1.570038s, 5.34293MB/s
Read-ahead success for size 524288

1.472000s, 5.69878MB/s
Read-ahead success for size 1048576