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Re: [DNSOP] Anycast and DNS questions

"Guangqing Deng" <dengguangqing@cnnic.cn> Wed, 03 September 2014 15:42 UTC

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Date: Wed, 03 Sep 2014 23:42:15 +0800
From: Guangqing Deng <dengguangqing@cnnic.cn>
To: mohta <mohta@necom830.hpcl.titech.ac.jp>
References: <20140806114759.GF5546@cisco.com>, <25907D96-0076-417A-8DB9-41A5A178D479@ianai.net>, <20140806123205.GG5546@cisco.com>, <2014082716115865363718@cnnic.cn>, <BAF35D7F-D6BA-45F3-B57E-BAF25F940355@virtualized.org>, <5405718F.5010007@sidn.nl> <2014090312002502171843@cnnic.cn>, <5406DD50.5040502@necom830.hpcl.titech.ac.jp>
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Cc: "dnsop@ietf.org" <dnsop@ietf.org>
Subject: Re: [DNSOP] Anycast and DNS questions
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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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