September 29, 2017 to October 3, 2017
Fairmont San Jose
US/Pacific timezone

What's In the Cache?

Sep 30, 2017, 10:30 AM
Regency 2 Ballroom (Fairmont San Jose)

Regency 2 Ballroom

Fairmont San Jose

170 S Market Street, San Jose, 95113, CA, USA
Standard Presentation Public Workshop Public Workshop


Mr Ralf Weber (Nominum)


Caching resolvers are the backbone of the internet, answering trillion of questions for billions of subscribers every day. Every request is cached until its TTL expires or something else needs to be cached. DNS data researchers often construct queries so they’re not cached, but let’s have a detailed look inside a resolver to see how it reacts to queries from average Joe’s accessing the Internet to do their jobs or just going through their daily routine. What’s served out of cache and what requires resolution? What are the most frequently queried domains? What is validated with DNSSEC? What’s the impact of cache size on the cache hit rate? This session will examine data from a production resolver to answer these questions.
Talk Duration 30 Minutes

Primary author

Mr Ralf Weber (Nominum)

Presentation materials