On 16/04/15 01:57, Lorenzo Colitti wrote:
For the avoidance of mystery: Google performs measurements of IPv6
connectivity and latency on an ongoing basis. The Google DNS servers do
not return AAAA records to DNS resolvers if our measurements indicate
that for users of those resolvers, HTTP/HTTPS access to dual-stack
Google services is substantially worse than to equivalent IPv4-only
services. "Worse" covers both reliability (e.g., failure to load a URL)
and latency (e.g., IPv6 is 100ms worse than IPv4 because it goes over an
ocean). The resolvers must also have a minimum query volume, which is
fairly low.
Lorenzo,
Thanks for the response.
Do you know if Google have given any thought as to how long they might
find it necessary to take these measures? Years, indefinitely?
Just curious.
