Re: Jonathan Yarden @ TechRepublic: Disable DNS caching on workstations

[Randy Bush <randy () psg com>]

> It would be very interesting in seeing the difference in DNS traffic for a 
> domain if it sets TTL to let's say 600 seconds or 86400 seconds. This 
> could perhaps be used as a metric in trying to figure out the impact of 
> capping the TTL? Anyone know if anyone did this on a large domain and have 
> some data to share?

there is some good analysis in the classic paper

@inproceedings{ dnscache:sigcommimw01,
  title = {DNS Performance and the Effectiveness of Caching},
  author = {Jaeyeon Jung, Emil Sit, Hari Balakrishnan and Robert Morris},
  booktitle = {Proceedings of the {ACM} {SIGCOMM} Internet Measurement Workshop '01},
  year = 2001,
  month = {November},
  address = {San Francisco, California},
  url = {citeseer.ist.psu.edu/jung01dns.html} }

randy