[Bloat] First draft of complete "Bufferbloat And You" enclosed.

[richard]

On Tue, 2011-02-08 at 20:43 +0100, Juliusz Chroboczek wrote:
> > If too many cars try to use the road at once, bad things happen.  One
> > of those bad things is cars running off the road and crashing. The
> > Internet analog of this is called 'packet loss'. We want to hold it to
> > a minimum.
> 
> I object to that, since it compares packet loss to a catastrophic
> failure.  (I would personally argue against a car analogy in the first
> place, but that's just stylistic preference.)
> 
This bothers me too. You almost have to inject a "MacGuffin" in the form
of a magic transporter at the entrance to all parking lots such that any
car that does not fit gets magically transported back to its origination
to try again - packet loss and retry - not catastrophic but very much a
penalty.

> > Suppose your rule for when a car gets to leave the parking lot is the
> > simplest possible: it fills up until it overflows, then cars are let
> > out the downstream side as fast as they can go.
> 
> I'm not sure what kind of buffer you're trying to illustrate.  That's
> certainly not how I understand tail-drop buffers.
> 
> Finally, I'd argue that you're being too harsh on QoS techniques.
> 
> --Juliusz
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-- 
Richard C. Pitt                 Pacific Data Capture
rcpitt at pacdat.net               604-644-9265
http://digital-rag.com          www.pacdat.net
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