[dns-operations] Presentation / paper on cache / TTL times?

Albert Braden abraden at about.com
Thu Nov 10 20:08:54 UTC 2016

The video is here (this presentation starts around 0:30):


-----Original Message-----
From: dns-operations [mailto:dns-operations-bounces at dns-oarc.net] On Behalf Of Pieter Lexis
Sent: Saturday, November 05, 2016 1:57 PM
To: dns-operations at dns-oarc.net
Subject: Re: [dns-operations] Presentation / paper on cache / TTL times?

Hi Warren,

On Sat, 5 Nov 2016 09:38:02 +0530
Warren Kumari <warren at kumari.net> wrote:

> A while back there was a cool presentation showing that most records
> expire from caches after something like 3 hours.
> I *think* that it was at an OARC meeting, but I cannot find it at the
> moment -- anyone know what / where it was?

I _think_ you mean the presentation "Negative Caching of DNS Records" from the OARC Spring 2015 Workshop[1], given by Stephan Lagerholm and Joe Roselli. Slides are here[2]

1 - https://indico.dns-oarc.net/event/21/contribution/4
2 - https://indico.dns-oarc.net/event/21/contribution/4/material/slides/0.pdf


Pieter Lexis
PowerDNS.COM BV -- https://www.powerdns.com
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