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NANOG Meeting Presentation Abstract

Toward Lowering the Load on DNS Root Nameservers
Meeting: NANOG26
Date / Time: 2002-10-29 1:50pm - 2:35pm
Room: Hellman/Williams/O\'Neill
Presenters: Speakers:

Duane Wessels, The Measurement Factory/CAIDA

Duane Wessels discovered Unix and the Internet as an undergraduate student studying physics at Washington State University. After playing System Administrator for a few years, he moved to Boulder, Colorado to attend graduate school. In late 1994, he joined the Harvest project, where he worked on searching, indexing and caching. From 1996 until 2000, he was co-principle investigator of the NLANR Information Resource Caching project (IRCache). During this time he and others developed and supported the Squid caching proxy. He has written a book, titled Web Caching, published by O\'Reilly and Associates. Currently, he is co-owner and president of The Measurement Factory, Inc., a company that specializes in evaluating the performance and compliance of HTTP-aware devices.
Abstract: CAIDA is continuing efforts to analyze DNS root server performance. We are characterizing DNS clients that send large numbers of queries to root servers. Analysis of trace data from the two F root servers shows a number of interesting things. Most of the high-rate queries exhibit the strange behavior of only using 25% of the query ID range. A number of sources also transmit each query two or three times. We also notice hourly spikes in the number of clients contacting the root servers. The talk will include results of analyses of which applications/configurations are broken, and how to fix or upgrade them.
Files: pdfDuane Wessels Presentation(PDF)
youtubeToward Lowering the Load on DNS Root Nameservers
Sponsors: None.

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