what is the advantage of using rsync over sftp

[Ahmed Kamal]

  I understand you want to do all the same steps, just replace rsync 
with scp ? Well the advantage, is that you will be doing the backups 
regularly, and here rsync shines, because it will only send to the 
remote end the files that have been changed from the last backup! scp 
would just send everything

On 09/29/2010 12:48 PM, Tapas Mishra wrote:
> What is the advantage of using rsync over scp or sftp?
> On same list I have put up a problem of taking backup of an LVM.
> Which I mentioned here
> http://forum.nginx.org/read.php?26,135008,135251#msg-135251
> I used rsync but I am not clear with what is the advantage of doing
> all this hard work.
> What I saw was a snapshot lvm was created which was mounted some where
> and  I copied
> complete directory structure to some remote location.
> What is the advantage of all this hard work can simple scp or sftp not
> do the same thing?
>