I've read that rsync can back up a number of files, say from 1 to 1 million, or also use wildcards to backup 'A' through 'D' and so on.

If successful, rsync should connect to the backup server, and transfer the files within the designated path. The process may take a while, if you're backing up a large number of files. Creating an ...

I believe OS X stopped using the data/resource fork model a while ago (and I believe that was the issue using a vanilla rsync to copy files to/from an HFS/HFS+/AFP filesystem).