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?
Guangqing Deng CNNIC From: Antoin Verschuren Date: 2014-09-02 15:28 To: dnsop@ietf.org Subject: Re: [DNSOP] Anycast and DNS questions -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Op 27-08-14 om 16:04 schreef David Conrad: > Hi, > > On Aug 27, 2014, at 1:11 AM, Guangqing Deng <dengguangq...@cnnic.cn <mailto:dengguangq...@cnnic.cn>> wrote: >> Here, one interesting question can be raised is what is the best localization policy for DNS? Should DNS clients visit the anycast server with the least network latency (which can be measured by RTT) or minimal AS hops or minimal router hops? In other words, the question is about what is the best assessment index for DNS system. > > I suspect DNS clients care primarily about getting correct answers as quickly as possible. I doubt they care about hops be they AS or router. Question is: Why do you anycast in the first place. I think for DNS, primary reason is redundancy and resilience, which is why spreading capacity is the primary goal. Reducing latency, or better, not increasing latency by introducing anycast is it's secondary goal. For other services, goals may be different. - -- Antoin Verschuren Technical Policy Advisor SIDN Meander 501, PO Box 5022, 6802 EA Arnhem, The Netherlands P: +31 26 3525500 M: +31 6 23368970 Mailto: antoin.verschu...@sidn.nl XMPP: antoin.verschu...@jabber.sidn.nl HTTP://www.sidn.nl/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQEcBAEBAgAGBQJUBXGKAAoJEDqHrM883AgnxnsH/RxIIZIS7eI4V05uRr70ScTP 88MNp2L3Wo7t4toBvVI2/IB812KZ8gPryD6DfF7eu/FulNJvgpj6dRvvWNbG02gC 52KdC+zzDZDhLjrF+Zjuf9wddXrhpgrie3v14I76Fe4E5mtWwNvZHGyyWLZHOZek YnLXzacm2jH/H6hiD0o/d1VUQtyzIj1nDAHr/JBqHUNN92D28/OxY5DBeX5Y+jnj iwtT/MJ4KynbDD2+NiPZ1ExeBzMv3KM1LR+p5uCg8IKjsZI2iUc1Pu58VzQno57S rkxZXrJTAoO1Te0J0LAVUTLV2+fQRVpjYn6sJ/0CGp5MfdE9nMkeG/Nj50nD2e4= =ruZ9 -----END PGP SIGNATURE----- _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
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