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Chromium DNS performance

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Re: Chromium DNS performance

#21
post #19

Earlier quoted context omitted.

It seems that you don't know what a stub resolver is. A stub resolver is a piece of software which uses the DNS (and other) servers listed in the system configuration to resolve names to addresses. The stub resolver may use a variety of strategies when deciding which of the configured servers to use, how to time the queries, and what to cache; but stub resolvers respect the system admin's wishes WRT what name resolut…

There is no connection between a stub resolver as Chrome is implementing it, and the system-indicated DNS server. This, as an aside, is what's wrong with HN. People cite RFCs or other datapoint as if it validates their point, when in fact, it does no such thing. You can run 10 stub resolvers on your system, each talking to a different DNS server. A stub simply indicates that it lacks the fortitude for full-blown root…

Firstly I'm not making a point, I'm giving you information that your vague hand-wavy rant seems to indicate that you don't have. Secondly, I point to the RFCs to indicate that my description of stub resolvers isn't just my opinion, but is somewhat in line with the community definition.

I never said that one could not have multiple stub resolvers installed on a single system. I also never intended to imply this. There's no reason to believe that the Chromium stub resolver will do anything but intelligent caching and fetching. Certainly, there's nothing in the linked Google Plus post to make me believe otherwise. Mr. Chan mentions that writing a browser-specific stub resolver is really the wrong thing to do, but it's something that they really need to do to get their target DNS query performance and to detect and work around certain kinds of really shitty breakage.

Why did you get downvoted? Perhaps because you said

I like how they mask very crystal-clear strategy...

when the strategy is anything but clear to anyone but you. By way of explanation, you point to a multi-page article about you and OpenDNS in which -among many other things- you say "[Google has] a separate privacy policy for Google DNS, and I’m sure they are hypersensitive about privacy concerns, so I wouldn’t be too paranoid [about the possibility of DNS query logging and data mining].". I'm not sure what strategy it is that you're worked up about, but it would be really nice if you'd come out and say it, rather than being all oblique and mysterious.

Additionally, it would seem that you're the CEO or President or something of OpenDNS? It's exceedingly poor form to say vague FUDdy smelling things about companies that compete with your core business. If you're going to say something, man up and say it; don't make others feel around to maybe discover a hint of what your point was.

Re: Chromium DNS performance

#22
post #20

Earlier quoted context omitted.

I'm neither a Google employee, nor can I speak for the team that runs Google's public DNS servers, but I'd be surprised if that team didn't consider "using Google's DNS servers [causes] the Internet [to get] a lot slower" to be a major bug. 8.8.8.8 and 8.8.4.4 are supposed to be anycast addresses which route to the closest server to your location. [0] [0] https://code.google.com/speed/public-dns/faq.html#anycast

That same FAQ directly addresses this problem. They are supposedly working with the IETF on a specification solution to the problem (which will likely take forever to get good deployment of, if it even happens). With existing infrastructure, however, the core issue is not going to be addressed unless Google has some Nyquist limit dominating ratio of DNS servers to the number of servers Akamai has (which is a very lar…

Hmm. That FAQ entry indicates that there are far few Google DNS servers deployed than I would have expected.

Anyway I bet that there would need to deploy fewer servers to get good CDN performance than one would think.

Drop one along side the YouTube mirrors that are already in every Comcast POP. IIRC, that gets you about 20% of USian Internet users, plus those ISPs which have reasonably decent routes to Comcast's networks. Drop one at every major and medium-sized university. That oughtta give you good geographic coverage.

shrug But what do I know? Not that much, that's for sure!

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