svnadmin dump /var/repo/myRepo > /home/username/myRepoBackup
To restore the repository to a different machine or a different repository, create the new repository by issuing the following command:
svnadmin create /home/username/repo
To restore the data, enter this command:
svnadmin load /home/username/repo < /home/username/myRepoBackup
For more information see the free svn book about the topic here.
