always copy the whole file?

[AndyWu]

Here's how it works in my 2 computers.

First, on auk2
# rsync -a auk1::pub/linux.iso .
It takes about 4 minutes. Everything is fine.

However, after doing this on auk1,
# echo "hello" >> /pub/linux.iso

Then, on auk2
# rsync -a auk1::pub/linux.iso .

The execution time of the first command is still 4 minutes.
I think it's supposed to be much shorter than the first case?
The same results appear in local rsync, too.
Is there anything wrong with my commands?


thanks in advance


Andy