nanog mailing list archives
Re: DNS Reliability
From: Glen Wiley <glen.wiley () gmail com>
Date: Thu, 12 Sep 2013 16:40:05 -0400
Remember though that anycast only solves for availability in one layer of the system and it is not difficult to create a less available anycast presence if you do silly things with the way you manage your routes. A system is only as available as the least available layer in that system For example, if you use an automated system that changes your route advertisements and that system encounters a defect that breaks your announcements then although a well built anycast footprint might acheive 99.999, a poorly implemented management system that is less available and creates an outage would reduce the number. On Thu, Sep 12, 2013 at 4:25 PM, Phil Fagan <philfagan () gmail com> wrote:
Its a good point about the anycast; 99.999% should be expected. On Thu, Sep 12, 2013 at 2:14 PM, Beavis <pfunix () gmail com> wrote:I go with 99.999% given that you have a good number of DNS Servers (anycasted). On Thu, Sep 12, 2013 at 9:03 PM, Phil Fagan <philfagan () gmail com> wrote: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? -- Phil Fagan Denver, CO 970-480-7618-- () ascii ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments Disclaimer: http://goldmark.org/jeff/stupid-disclaimers/-- Phil Fagan Denver, CO 970-480-7618
-- Glen Wiley KK4SFV "A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away." - Antoine de Saint-Exupery
Current thread:
- DNS Reliability Phil Fagan (Sep 12)
- Re: DNS Reliability Bryan Tong (Sep 12)
- Re: DNS Reliability Beavis (Sep 12)
- Re: DNS Reliability Phil Fagan (Sep 12)
- Re: DNS Reliability Glen Wiley (Sep 12)
- Re: DNS Reliability Phil Fagan (Sep 12)
- Re: DNS Reliability Phil Fagan (Sep 12)
- Message not available
- Re: DNS Reliability Larry Sheldon (Sep 12)
- Re: DNS Reliability Marco Davids (Prive) (Sep 13)
- Message not available
- Re: DNS Reliability Larry Sheldon (Sep 13)
- Re: DNS Reliability Phil Fagan (Sep 13)
- Re: DNS Reliability Jean-Francois Mezei (Sep 13)
- Re: DNS Reliability Joe Abley (Sep 13)
- Re: DNS Reliability bmanning (Sep 13)
- Re: DNS Reliability Niels Bakker (Sep 16)
- Re: DNS Reliability Nick Hilliard (Sep 16)