[165623] in North American Network Operators' Group
Re: DNS Reliability
daemon@ATHENA.MIT.EDU (Jean-Francois Mezei)
Fri Sep 13 16:02:09 2013
Date: Fri, 13 Sep 2013 16:01:51 -0400
From: Jean-Francois Mezei <jfmezei_nanog@vaxination.ca>
To: nanog@nanog.org
In-Reply-To: <52327019.7070600@cox.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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.
