Speaker
Mr
Kazunori Fujiwara
(Japan Registry Services Co., Ltd)
Description
The Domain Name System (DNS) is a key part of the infrastructure of
the Internet. Recent discussions have centered on the removal of the
shared DNS resolver and the use of a local full-service resolver
instead. From the viewpoint of the cache mechanism, these discussions
involve removing the shared DNS cache from the Internet. Although the
removal of unnecessary parts from a total system tends to simplify the
system, such a large configuration change in the system would need to
be be carefully analyzed before its actual deployment.
This talk presents our analysis of the effect of a shared DNS
resolver based on the campus network traffic. Our findings were as
follows: 1) this removal can be expected to amplify the DNS traffic by
about 3.3 times, 2) the amplification ratio on the root DNS is much
higher (about 10.9 times), and 3) removal of all caching systems from
the Internet is likely to amplify the DNS traffic by approximately
12.1 times. Thus, the above-mentioned shared DNS resolver removal
should not be considered. Our data analysis also revealed: 4) an
increase in the number of clients that do not have a local DNS cache
and generate repeated queries at short intervals (less than 1 min). 5)
Since the amount of traffic from such clients is not small (about
95.0% of total DNS traffic), the deployment of a local cache itself
is feasible.
This material comes from K. Fujiwara, A. Sato, K. Yoshida, "Cache
Effect of Shared DNS Resolver", Proceeding of COMPSAC 2017 (IEEE
Computer Society Signature Conference on Computers, Software and
Applications).
| Talk Duration | 30 Minutes |
|---|
Primary author
Mr
Kazunori Fujiwara
(Japan Registry Services Co., Ltd)
