Something like rsync should work good, but it's not available for FTP, but there are some options: http://serverfault.com/questions/24622/how-to-use-rsync-over-

Something like rsync should work good, but it's not available for FTP, but there are some options: http://serverfault.com/questions/24622/how-to-use-rsync-over-ftp http://serverfault.com/questions/24622/how-to-use-rsync-over...