[dns-operations] The (very) uneven distribution of DNS root servers on the Internet

[Simon Munton]

Absolutely. However, I guess the question I was asking is, if AXFR of 
the ROOT zone was done as a matter of course, say on by resolvers, would 
the increased TCP load be sustainable at the public facing nodes? or 
would it be better to split the provision into public facing 
authoritative server and public facing XFR provider?

If the XFR is a few seconds late, there is little consequence (esp given 
the time it takes IANA to make changes), but if the standard provision 
is a few seconds late it has undesirable consequences.


probably also AS112


On 18/05/2012 03:47, paul vixie wrote:
> On 5/16/2012 10:04 AM, Simon Munton wrote:
>> I agree - I also think a formal documented infrastructure of first&
>> second level ROOT slaves could be useful to spread the load - similar
>> to NTP?
>
> i hope we won't go that far. there's good reason why HOSTS.TXT is dead.
>
> but doing this for just the root zone, inside of otherwise
> recursive-only servers, has a high perceived benefit and low perceived
> cost, for most recursive server operators.
>
> google dns and opendns both do it; the people involved tell me that this
> saves on total transaction time for dns lookups, and 'feels more
> resilient' than sending queries to root name servers.
>
> especially given that most root server responses are negative, in ways
> that aren't cacheable today.
>