Slow SSH copy

Wed Nov 9 14:53:24 UTC 2005

On Wed, Nov 09, 2005 at 12:03:48PM +0100, Anand Buddhdev wrote:
> Please keep in mind that SCP has the overhead of encryption. All the 
> data is encrypted before being sent, and then decrypted at the other 
> end. So SCP will never be as fast as RCP, HTTP or FTP for file 
> transfers. I'm not a networking expect, so I won't try to guess how 
> much performance is lost using SCP. Perhaps someone else who is more 
> knowledgeable might answer that.

There are patches for high-performance SSH at the following link,
including one that allows for "null" encryption authentication, while
preserving authentication and integrity checking:

   http://www.psc.edu/networking/projects/hpn-ssh/

Regards,

    Bill Rugolsky