From RFC1034 section 4.1, it seems that the way used for improving the
redundancy and resilience of DNS system is to increase DNS servers. I agree
that for the performance of the DNS system, the redundancy and resilience are
the first goal and low latency is the second goal. Usually, the first goal
mainly depends on the DNS server deployment policy (such as the total number
and geographical distribution of DNS severs) and the second goal relates to not
only the DNS server deployment policy but also the method used for DNS clients
selecting the best DNS server like anycast. In my opinion, to obtain higher
resilience as well as lower latency, there may be two phases in deploying DNS
servers. In the first phase, some DNS servers should be deployed at secure
sites that have rare natural and man-made disasters for better resilience and
then in the second phase the other DNS servers should be deployed at those
sites that are near DNS clients as much as possible for lower latency. And
anycast may only be one kind of technology, which makes the DNS clients access
the nearest DNS server but not the other DNS servers when deployment sites of
all DNS servers are fixed.
Guangqing Deng
cnnic
From: Masataka Ohta
Date: 2014-09-03 17:20
To: dnsop
Subject: Re: [DNSOP] Anycast and DNS questions
Guangqing Deng wrote:
> I am interested in the topic of the redundancy and resilience of the
> DNS system, and are there any specific documents about this topic,
> such as how to achieve that goal?
rfc1034 section 4.1.
Masataka Ohta
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