SVN Repository Structure - Why is this better?

Question

I've been told that most development shops have the following structure or at least close to this:

• Main Repository
  • Project folders underneath
  • Each Project folder has a trunk, branches, and tags folder

so:

ReponsitoryMain
    Project1
        branches
        trunk
        tags
    Project2
        ...

So why is this better or best? What happens or what heartaches have you come across if you did it another way?

Answer 1

Most people do this because it's recommended by the Subversion book.

Here's a good explanation from the director of the CollabNet Subversion project:

http://blogs.collab.net/subversion/2007/04/subversion_repo/