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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: [nanog] Re: Microsoft offering xDSL access
> 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?
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