Winter 2007 Joint Techs

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Lightning Talks

Time 02/14/07 11:15AM-11:55AM

This livestream has concluded. The archive video will be posted here. Archives can take up to two weeks to be posted.

Session Abstract

David Farmer

It's 2:00 am, March 11th, 2007. Does your network know what time it is?

A reminder of changes to Daylight Saving Time by the Energy Policy Act of
2005.

Michael Sinatra

Why we should eighty-six five nines

Network and computer vendors have latched onto the idea of "five-nines" (99.999%
uptime) for several years now. Although the five-nines fixation benefits vendors because it
usually requires redundant equipment, planning for five-nines requires overkill,
over-engineering, and considerable expense. Moreover, trying to engineer five-nines into a
system can be counter-productive, as the increasing complexity in networks and services
makes troubleshooting and ETR more difficult when catastrophic problems do actually occur.
I note the complexity factor and related degrees-of-freedom issue, as well as general
issues of redundancy (and the counter-arguments to redundancy), and also point out the
negative security implications of the five-nines fixation. I argue that the five-nines
fixation runs contrary to a more careful consideration of network usage patterns and uptime
requirements and should be discarded.

Glen Turner

Interesting observations from last week's 5th International
Workshop for Fast Long-Distance Networks


This annual workshop (http://wil.cs.caltech.edu/pfldnet2007/) was established to discuss the issues
surrounding the use of fat pipe networks. It has become
the major workshop where new TCP algorithms and
implementations are discussed.

*Notes*

All slides must be pre-loaded on the podium laptop -- you will not be permitted to use your own laptop, as there just won't be time for swapping. Slides must be received by 9:30 AM Wednesday.

Remember, the 300-second limit will be strictly enforced! (The SuperSoaker was nixed, but there was the suggestion of nice wet snowballs.) Some tips on how to do a successful Lightning Talk are at
http://www.perl.com/pub/a/2004/07/30/lightningtalk.html.

Speakers

Speaker Michael Sinatra University of California, Berkeley

Speaker Glen Turner AARNet

Speaker David Farmer University of Minnesota

Presentation Media

media item thumbnail Why we should eighty-six five nines (ppt)

Speaker Michael Sinatra University of California, Berkeley