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RE: OpenSSH hpn detection
From: "Dario Ciccarone (dciccaro)" <dciccaro () cisco com>
Date: Tue, 30 Oct 2007 10:17:08 -0400

No to be nit-picky, but :)

"for high-bandwidth, high-latency networks."

That isn't 100% true - check
http://www.psc.edu/networking/projects/hpn-ssh/papers/i2mm-hpn-ssh.ppt .
As the BDP is calculated based on BW and RTT, higher RTTs would surely
mean higher BDP values and bigger buffers - but even in high bandwith,
low-latency networks you should see an improvement on the transfer rate.

Dario


-----Original Message-----
From: nmap-dev-bounces () insecure org 
[mailto:nmap-dev-bounces () insecure org] On Behalf Of Matt Selsky
Sent: Tuesday, October 30, 2007 9:45 AM
To: Kris Katterjohn
Cc: nmap-dev () insecure org
Subject: Re: OpenSSH hpn detection

Sorry this is more offtopic than not, but I just have to say that
HPN-SSH looks mighty interesting!  Is it really as cool as it looks?

Yes, for high-bandwidth, high-latency networks.

For example we were transferring files from Los Angeles to 
New York over 
Internet2.  Without HPN, scp was going at 900KB/s.  With the HPN 
patches, scp sped up to 20MB/s.


-- 
Matt

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