North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: [nanog] Re: Microsoft offering xDSL access
On Fri, Jan 23, 1998 at 11:55:19AM -0800, Paul A Vixie wrote: > > HTTP is not nearly as cacheable as you would think, and caching it has some > > bad side effects in many cases - which your customers will likely bitch > > about. > > (temptation to advertise a product here resisted with some difficulty.) > > > Let's say that you can cache 50% of the HTTP traffic, which frankly, from > > what I've seen is HIGHLY aggressive, but I'll be nice and give you that for > > the sake of argument. > > 50% is easy with two level caching. you just need fat pipes between the two > levels, and high availability at the root of the hierarchy, and a LOT of users > to help get as much variety as possible in the requests. i've seen 65% when > the wind was behind it. > > > Ok, so its only 500:1 assuming 50% effectiveness on the HTTP side. > > > > It still won't work. > > > > Now, if you intend to rate-shape (as opposed to tossing packets on the floor > > when you get overcommitted) then you ARE committing fraud if you don't tell > > the truth about it. And, frankly, the customer really gets hosed with this > > kind of model - because you have to be pretty predictive for this to give > > you any kind of net gain in effective utilization, which means you apply the > > chokes BEFORE the peak levels get hit. > > and this differs from the cable modem internet market in precisely which way? Uh, it doesn't :-) (I've done the analysis of this for a cable company a couple of years ago). -- -- Karl Denninger ([email protected])| MCSNet - Serving Chicagoland and Wisconsin http://www.mcs.net/ | T1's from $600 monthly to FULL DS-3 Service | NEW! K56Flex support on ALL modems Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost
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