16 Aug
2007
16 Aug
'07
2:46 a.m.
On Aug 15, 2007, at 10:13 PM, Adrian Chadd wrote:
Well, emprically (on multi-megabit customer-facing links) it takes effect immediately and results in congestion being "avoided" (for values of avoided.) You don't hit a "hm, this is fine" and "hm, this is congested"; you actually notice a much smoother performance degredation right up to 95% constant link use.
yes, theory says the same thing. It's really convenient when theory and practice happen to agree :-) There is also a pretty good paper by Sue Moon et al in INFOCOMM 2004 that looks at the Sprint network (they had special access) and looks at variation in delay pop-2-pop at a microsecond granularity and finds some fairly interesting behavior long before that.