sftp performance problem, cured by TCP_NODELAY

Chris Rapier rapier at psc.edu
Tue Jan 31 06:50:30 EST 2006

Tony Finch wrote:

> Actually this part of the SFTP protocol is disastrous for links with large
> bandwith * delay products, and it's pointless given that the underlying
> TCP connection is already doing windowing. SFTP should just send data
> as fast as it can.

I think to do that it would have to bypass the channel layer congestion 
control that SSH uses. Has anyone with the SFTP problems tried it using 
SSHv1 (assuming that is possible)? Also, has anyone tried this with SFTP 
using the HPN patch?

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