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A comment on DNS 101: An Introduction to Domain Name Servers. Parent comment

Re:DNS 101: An Introduction to Domain Name Servers by wcip on Thursday October 17, 2019 @07:25PM (#21287283)
What about the failure rate of all the DNS servers? It's not like someone set up a Windows Server box and we all share it. Google's DNS server at 8.8.8.8 for example uses some sort of complex multihoming/multicast setup and is globally distributed. I trust DNS to work more than any other service on the internet. It's a triumph of software engineering. The Roman aqueduct of the internet.
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Re:DNS 101: An Introduction to Domain Name Servers by waste_monk on Thursday October 17, 2019 @07:55PM (#21287449)
AFAIK they use Anycast for the multihoming [0] - It follows the normal routing process, but the anycasted network is announced from multiple sites instead of just one.

AFAIK Google have ~19 data centres, and DNS / 8.8.8.8 is probably being served from all or most of them. So it is indeed very reliable.

[0] https://en.wikipedia.org/wiki/Anycast

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