19 Jun
2015
19 Jun
'15
5:06 p.m.
On Jun 18, 2015, at 10:19 PM, James Hartig <fastest963@gmail.com> wrote: Just curious, how does DNS load balancing work if people are using 8.8.8.8/208.67.222.222 or basically any public resolvers that cache and have a significant (relatively speaking) user-base? Is the actual percent of requests so small that it doesn't matter?
The percent of requests is significant, but OpenDNS and Google and the other significant open resolvers are, themselves, anycast, so the geographic correlation is preserved. Also, there’s an RFC for passing an origin IP tag along to the authoritative server, but I don’t know if anyone’s actually doing anything with that on any global inter-provider scale. -Bill