Satellite IP

mikea mikea at mikea.ath.cx
Tue Jan 11 08:20:51 CST 2011


On Mon, Jan 10, 2011 at 04:33:30PM -0500, Jay Ashworth wrote:
> ----- Original Message -----
> > From: "Valdis Kletnieks" <Valdis.Kletnieks at vt.edu>
> 
> > > Why the hostility, Valdis?
> > 
> > As I said several times - it's not hard to be 98% or 99% sure you can make
> > all your commitments. However, since predicting the future is an inexact
> > science,
> > it's really hard to provide a *100% guarantee* that you'll have enough
> > contended capacity to make all the performance targets even if every
> > single occasional customer shows up at once. As Jay pointed out in his
> > follow-up note, his backup strategy is "scramble around and hope another
> > provider can
> > come through in time", which is OK if you *know* that's your strategy
> > and are OK on it. However, blindly going along with "my usual provider
> > guaranteed 100% availability" is a bad idea.
> 
> I don't think Kelly is on his first rodeo, and I know I'm not.
> 
> "scramble around" is a bit pejorative as descriptions for my booking 
> strategy go, but everyone has a cranky day every so often, not least me.
> 
> :-)
> 
> And note that I *also* pointed out that carrier statmuxing on the 
> transport is a valid strategy for capacity elasticity, in that particular
> environment.
> 
> > Remember, we're coming out of a solar minimum. ;)
> 
> Are we in fact coming out of it yet?  I heard it was getting deeper,
> and that we were looking at a Dalton, if not another Maunder.

I'll have to find the paper I read yesterday that said we should expect to
wait a long time before we see sunspot counts back where they should be.
... Try this:

<http://news.sciencemag.org/sciencenow/2010/09/say-goodbye-to-sunspots.html>

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin 




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