How to find out Subversion repository version?

Question

How can I determine current version of my repository to see if I need to upgrade it (svnadmin upgrade)?

In reality I\'m hosting SVN with 3rd party and I want to find

Answer 1

Have a look at /db/format. After upgrading to 1.5 format, my format file shows:

3
layout sharded 1000

Before it used to be:

2