North American Network Operators Group
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: 923 Mbps across the Ocean ...

  • From: Hank Nussbacher
  • Date: Sat Mar 08 13:23:01 2003 
At 10:09 PM 07-03-03 +0100, Mikael Abrahamsson wrote:


On Fri, 7 Mar 2003, Richard A Steenbergen wrote:

> Production commercial networks need not apply, 'lest someone realize that
> they blow away these speed records on a regular basis.

What kind of production environment needs a single TCP stream of data
at 1 gigabit/s over a 150ms latency link?

Just the fact that you need a ~20 megabyte TCP window size to achieve this
(feel free to correct me if I'm wrong here) seems kind of unusal to me.
See: http://www.psc.edu/networking/perf_tune.html for many details of tuning your TCP stack. Interesting that most of the links lead to places like PSC, VT, ANL, ORNL, UofHannover and NLANR. If commercial ISPs have been doing this stuff "on a regular basis", please let us know where it is documented since it is a bit well hidden.

-Hank


--
Mikael Abrahamsson    email: [email protected]