1 / 15

Diversity in DNS performance Measures

Diversity in DNS performance Measures. R.Liston, S.Srinivasan, E.Zegura Presented by Baoning Wu. Motivation. DNS performance in the wide-area is not well understood. Few studies of DNS from client locations. DNS behavior and terminology. Measurement methodology.

yama
Télécharger la présentation

Diversity in DNS performance Measures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Diversity in DNS performance Measures R.Liston, S.Srinivasan, E.Zegura Presented by Baoning Wu

  2. Motivation • DNS performance in the wide-area is not well understood. • Few studies of DNS from client locations.

  3. DNS behavior and terminology

  4. Measurement methodology • Collect 14,983 domain names • Run their own tool independently on different sites ( 75 sites ) in the world (21 countries) • Two primary periods: Jan 2002 and Mar/Apr 2002.

  5. Their Tool • The key component is BIND named server. • Modified to log each event with timestamp. • A script to drive name lookups • Post-process the logs.

  6. Results: Complete vs successful

  7. Results: Mean Response time

  8. Results: MRTc vs MINc • Connectivity: Minimum response time of completed lookups (0.62)

  9. Results: retries vs. MRTc • Loss rate: number of retries (0.50)

  10. Results: MRTr vs. MRTc • MRTr: mean response time for root servers • (0.86)

  11. Results: MRTg vs. MRTc • 0.94

  12. Results: Percentages of different servers

  13. Results: favored servers

  14. Results: Aliases and CNAMEs

  15. QUESTIONS?

More Related