Re: HPN-SSH Performance vs. OpenSSH/SFTP Performance

To my knowledge, the HPN-SSH patches have not yet been rolled into the
OpenSSH tree.

For a local LAN, the "-o NoneSwitch=yes" option to turn off encryption
will improve network performance by reducing CPU load, but you could
also use the "-c none" option in standard OpenSSH.

Note - The standard "-c none" option is NOT the same has HPN-SSH's
NoneSwitch option.  Only consider "-c none" on a "safe" network.  I am
not sure if the "none" cipher is even available in some Linux
distributions.

However, for high-speed, high-latency connection, HPN-SSH rocks.  With
the proper tuning of TCP options, our cross-continent gigabit
connection runs at 15MByte/s, as compared to ~700kByte/s before
HPN-SSH.



On Nov 13, 2007 12:37 PM, Mathew Brown <mathewbrown@fastmail.fm> wrote:
> Hi,
>   I just came across the High Performance SSH/SCP - (HPN-SSH) -
>   http://www.psc.edu/networking/projects/hpn-ssh/ - and was wondering if
>   the HPN patches had been ported to mailine OpenSSH.  If not, what
>   suggestions are available for improving the speed of SFTP in local LAN
>   environments?  Thanks for your help.
> --
>   Mathew Brown
>   mathewbrown@fastmail.fm
>
> --
> http://www.fastmail.fm - Does exactly what it says on the tin