DNS Reliability

Fri Sep 13 20:01:51 UTC 2013

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.