nanog mailing list archives
Re: DNS Reliability
From: Sebastian Castro <sebastian () nzrs net nz>
Date: Tue, 17 Sep 2013 08:45:56 +1200
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 13/09/13 12:45, Valdis.Kletnieks () vt edu wrote:
On Thu, 12 Sep 2013 14:03:44 -0600, Phil Fagan said:Everything else remaining equal...is there a standard or expectation for DNS reliability? 98% 99% 99.5% 99.9% 99.99% 99.999% Measured in queries completed vs. queries lost. Whats the consensus?Remember to factor in Duane Wessel's work that showed that something like 98% of the DNS traffic at the root servers was totally bogus? Maybe you need to factor in "broken queries not answered, and offenders slapped around with a large trout"? Because if it's busted requests you're sending towards the root, they're going to count against your completed/lost ratio in a really bad way. Anybody know if people have cleaned up their collective acts since Duane did that paper?
Wearing a different hat, I had the chance to rerun that analysis with data from 2008 (original paper is from 2003) and the number were still around 98% http://www.caida.org/publications/presentations/2008/wide_castro_root_servers/wide_castro_root_servers.pdf Cheers, - -- Sebastian Castro DNS Specialist .nz Registry Services (New Zealand Domain Name Registry Limited) desk: +64 4 495 2337 mobile: +64 21 400535 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iEYEARECAAYFAlI3bfYACgkQWyqRrHcQWTkagwCeOaShzFH1i8q9Y34/cybV6bUY qBYAn1A8JPgNJqH6mijUFN7+4ufybJqZ =X7UE -----END PGP SIGNATURE-----
Current thread:
- Re: DNS Reliability, (continued)
- Re: DNS Reliability Phil Fagan (Sep 12)
- Re: DNS Reliability Eric Brunner-Williams (Sep 12)
- Re: DNS Reliability Randy Bush (Sep 12)
- Re: DNS Reliability George William Herbert (Sep 12)
- Re: DNS Reliability George Michaelson (Sep 12)
- Re: DNS Reliability Randy Bush (Sep 12)
- Re: DNS Reliability George William Herbert (Sep 12)
- Re: DNS Reliability George Michaelson (Sep 12)
- Re: DNS Reliability George William Herbert (Sep 12)
- Re: DNS Reliability Christopher Morrow (Sep 12)
- Re: DNS Reliability Sebastian Castro (Sep 16)