Deprecating scp

Dunno what option it is (and I don't think it's -a), but rsync does have an option that says "only write stuff that's changed". Great for making backups on a journalled file system as each snapshot is a full backup, but apart from the first only takes up the space of an incremental... (and yes for large files eg databases it only writes that part of the file)

Cheers,
Wol