How to manage the svn repository layout?

In the svn repository, the repository directory layout now is awful, I plan to reorganize the layout, But I don't know what's risk I will take.
Q1:If I move sub1 from / to sub2 directory, will the log and revision still remain under sub1?
Q2:If I move sub1 from / to sub2 directory, the workcopy need to relocate or checkout initally?
Thanks in advance!