nanog mailing list archives
Re: DNS Reliability
From: Eric Brunner-Williams <brunner () nic-naa net>
Date: Thu, 12 Sep 2013 19:32:44 -0700
On 9/12/13 1:39 PM, Rubens Kuhl wrote:
ICANN new gTLD agreements specified 100% availability for the service, meaning at least 2 DNS IP addresses answered 95% of requests within 500 ms (UDP) or 1500 ms (TCP) for 51+% of the probes, or 99% availability for a single name server, defined as 1 DNS IP address.
unless phil happens to be building out (or spec'ing out $provider's offered sla) for one of the happy thousand or so celebrants of 2014, a surprisingly large fraction of which are tenant plays on existing infrastructure, the bogie above, uninterpreted, is not a controlling authority. additionally, was phil asking for a metric for an authoritative server, serving a zone delegated directly from the iana root? was he asking for a metric for a caching server? and if the metric is "queries completed vs. queries lost", from where to where? (that is the "uninterpreted" bit from the bogie rubens quotes, as we did have to correct some assumptions of the requirement author -- where is the measurement being preformed? i'm with randy on this, dns is a service, the better question is what fails as query response degrades, in the presence of hierarchical caching and the protocol being used as designed under best effort of infrastructure and application. eric
Current thread:
- Re: DNS Reliability, (continued)
- 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)
- Re: DNS Reliability bmanning (Sep 23)
- Re: DNS Reliability Phil Fagan (Sep 12)
- Re: DNS Reliability Eric Brunner-Williams (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 Sebastian Castro (Sep 16)