[Bug 162253] Re: openssh: want hpn-ssh for 20x speed improvement!

[a7x]

Unfortunately, the HPN patch breaks the DynamicForward feature in at
least OpenSSH 5.0 (see <http://gnats.netbsd.org/45049>).  I'm not sure
how it fares with newer versions of OpenSSH.

>From the bottom of the HPN web site
(<http://www.psc.edu/networking/projects/hpn-ssh/>):

    Recent problems with buffer_append_space in HPN-SSH.  If you are
experiencing disconnects due to a failure in buffer_append_space please
let us know.  We're currently tracking some problems with this and we're
trying to gather more information to help resolve it.  You may want to
try using -oHPNBufferSize=16384 to restrict the growth of the buffer.
Let us know if that helps.

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https://bugs.launchpad.net/bugs/162253

Title:
  openssh: want hpn-ssh for 20x speed improvement!

Status in “openssh” package in Ubuntu:
  Triaged
Status in “openssh” package in Debian:
  New

Bug description:
  This is a wishlist item: hpn-ssh would be a big data-transfer speed
  improvement for many Ubuntu users, particularly scientific
  organizations like universities and observatories that transfer large
  amounts of data over long-haul networks, and large commercial users.
  hpn-ssh is a patch on openssh that just makes the TCP window variable
  in length, overcoming a static (and too-small) window size that is in
  openssh.  No modifications are made to the security aspects of the
  code.  Measured transfer rates are improved over some nets by a factor
  of 20.  It's in wide use already by banks, the US government, many
  grid computing centers, and security companies.  Even if it's not
  patched into openssh, making an alternative version available would be
  a service to the community.  Other distros have this, but synaptic
  shows me nothing for Ubuntu.  Here are some sites:

  http://www.psc.edu/networking/projects/hpn-ssh/papers/hpnssh-gridnets2007.pdf
  http://www.psc.edu/networking/projects/hpn-ssh/

  Thanks for listening,

  --jh--

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