efficient file appends

[Martin Pool]

On 12 Dec 2001, rsync at ka9q.net wrote:

> It seems to me that this situation is common enough that the rsync
> protocol should look for it as a special case. Once the protocol has
> determined from differing timestamps and/or lengths that a file needs
> to be synchronized, the receiver should return a hash (and length) of
> its copy of the entire file to the sender.

That's a good point and an interesting idea.  Naively implemented it
would add another round trip, which would probably not be worthwhile,
but there might be a better solution.  You might like to read the
technical report if you have not already.

-- 
Martin