Re: DNS Reliability

[Christopher Morrow <morrowc.lists () gmail com>]

On Thu, Sep 12, 2013 at 6:26 PM, George William Herbert
<george.herbert () gmail com> wrote:
> The other subthread about routeability plays into that.  For BIGPLACE environments, you should be considering how 
> many AS numbers independently host DNS instances for you, in how many geographical regions, and do you have a backup 
> registrar available spun up...

here's an interesting point... if you are a BIGPLACE, do you want to
trust your fate to some third party hosting your dns for you? What
about how your internal name service stuff is managed?

say you have a practice of using rsh to affect updates across your 4
main dns nodes, adding a 5th or Nth outside where rsh is not
possible/desired .... means adding additional processes and cruft to
your update process, is this acceptable?

Take, for instance the FBI.gov domain 3 days ago, some set of updates
happened, their ipv4 servers were answering with a consistent
response, their ipv6 nodes were answering with a variety of not
correct answers :( In the case of the FBI.gov domain, all of it is
handled outside 'fbi.gov hands' (all servers hosted externally) but...

-chris