Jan Danielsson wrote:
> >>    Is there a tool which can "synchronize" two files over an ssh tunnel
> >> (except unison, that is)?

> > I think that's what rsync does.
 
>    Hmm... I'll be the first to admit that I do not exactly know what
> rsync is. But if I remember correctly, unison uses "the rsync
> algorithm". I guess my next question is: Is it the rsync algorithm that
> requires vast amounts of RAM, or is it merely the implementation of it
> in unison?

I don't know but I don't see why it would need a lot of RAM for this unless
it's overly aggressive when looking for a good memory/traffic trade-off. I
don't know unison, so it might simply be a bug or naive use resources,
mmap etc.
 
>    Perhaps I will give rsync a try and see what happens.

See net/rsync in pkgsrc.

-- 
Christian