[dns-operations] Too Open (Was: OpenDNS makes your Internet work better

[Paul Vixie]

> > BIND's res_send() has had logic like this inside it since 4.9 or so.  Not
> > the RTT sorting thing, just the don't-keep-retrying-dead-servers thing.
> 
> This only helps with long-lived processes.  A lot of services are still
> implemented as short-lived processes, so the reachability information needs
> to be learnt over and over again.

yes, that's true, but since the stub resolver is only talking to a small
number of caching/forwarding recursive name servers, one expects that these
servers are "close by" and "usually reachable".  the place where one needs
history and RTT sorting and so forth is in these caching/forwarding servers,
not in the stub resolvers.

> [thread join]

(lots of agreement)