svnrdump dump
Dump—that is, generate a repository dump stream
            of—revisions of the repository item located
            at SOURCE_URL, printing the
            information to standard output.  By default, the entire
            history will be included in the dump stream, but the scope
            of the operation can be limited via the use of
            the --revision (-r)
            option.
Generate a dump stream of the full history of a remote repository (assuming that the user as who this runs has authorization to read all paths in the repository).
$ svnrdump dump http://svn.example.com/repos/calc > full.dump * Dumped revision 0. * Dumped revision 1. * Dumped revision 2. …
Incrementally dump a single revision from that same repository:
$ svnrdump dump http://svn.example.com/repos/calc \
           -r 21 --incremental > full.dump
* Dumped revision 21.
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