On Tue, Apr 28, 2015 at 4:34 AM, Tony Finch <[email protected]> wrote: > Phillip Hallam-Baker <[email protected]> wrote: >> On Tue, Apr 28, 2015 at 5:04 AM, Tony Finch <[email protected]> wrote: >> > Phillip Hallam-Baker <[email protected]> wrote: >> >> >> >> Having it work for content and DNS are two different things. The >> >> routing tables only need to be constant for a few minutes to support >> >> TCP content download. For DNS to be viable they have to be stable much >> >> longer. >> > >> > Why? >> >> The byterange extensions in http mean that it is possible to resume a >> session interrupted part way through if it is static content. > > Most HTTP interactions aren't resumable in this way, so this observation > does not suggest to me that HTTP needs less routing stability than DNS. > >> If the anycast changes then you are going to have to timeout and resume. > > This is also true for HTTP. I still don't see why DNS needs more routing > stability than HTTP.
DNS doesn't. But proposals like DNS over TLS rely on extremely long lived connections. Most HTTP traffic goes over short connections that end quickly. If we decide to shorten the connection length, even with features like TLS 1.3's 0-RTT, the traffic quantity and computational load will still increase. That's on top of the increased computation of TLS vs DNSCrypt. HTTP sends lots of packets over a short time, DNS few packets, long time, very fast response required. That's on top of different placements in networks. Maybe this isn't an issue, but I see some evidence it will be, and not much it won't be. Sincerely, Watson Ladd > > Tony. > -- > f.anthony.n.finch <[email protected]> http://dotat.at/ > Rockall, Malin, Hebrides, Bailey: West or northwest, becoming cyclonic 5 to 7, > occasionally gale 8, except in Hebrides. Rough or very rough, occasionally > high at first in Bailey. Rain or showers. Good, occasionally moderate. > > _______________________________________________ > dns-privacy mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/dns-privacy -- "Man is born free, but everywhere he is in chains". --Rousseau. _______________________________________________ dns-privacy mailing list [email protected] https://www.ietf.org/mailman/listinfo/dns-privacy
