[165625] in North American Network Operators' Group
Re: DNS Reliability
daemon@ATHENA.MIT.EDU (bmanning@vacation.karoshi.com)
Fri Sep 13 16:16:35 2013
Date: Fri, 13 Sep 2013 20:15:09 +0000
From: bmanning@vacation.karoshi.com
To: Jean-Francois Mezei <jfmezei_nanog@vaxination.ca>
In-Reply-To: <52336F2F.1030206@vaxination.ca>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Fri, Sep 13, 2013 at 04:01:51PM -0400, Jean-Francois Mezei wrote:
> On 13-09-12 21:53, Larry Sheldon wrote:
>
> > I expect 100.000%
> >
> > I'll accept 99.999% or better.
>
> At these numbers, one has to start to count failover time. A "system"
> can be disaster tolerant but take 2 hours to recover fully, or it could
> also recover within a couple of seconds. It depends on architecture and
> available services. And in networking, you also need to consider
> internal and external routing update propagation times.
>
>
from where? to where? what % of the Internet is _not_ reachable
from my DNS service at any given time? why is that acceptable?
and more importantly, who's job is it to fix/stablize the net so
these "remote" locations can reach my DNS service?
"we will answer 100% of the valid DNS queries we receive."
/bill
