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NANOG Meeting Presentation Abstract

Bufferbloat: "Dark" Buffers in the Internet
Meeting: NANOG52
Date / Time: 2011-06-14 11:30am - 12:00pm
This item is webcast
Room: Grand Ballroom
Presenters: Speakers:

James Gettys, Alcatel-Lucent Bell Labs

Jim Gettys is at Alcatel-Lucent Bell Labs, USA. Until January 2009, he was the Vice President of Software at the One Laptop per Child project, working on the software for the OLPC XO-1. He is one of the original developers of the X Window System at MIT. He worked at the World Wide Web Consortium (W3C)[1] and was the editor of the HTTP/1.1 specification in the IETF. Gettys helped establish the handhelds.org community, from which the development of Linux on handheld devices can be traced.<BR> <BR> Gettys worked at HP Labs' Cambridge Research Laboratory. He won Bob Metcalfe's 1997 Internet Plumber of the Year award on behalf of the group who worked on HTTP/1.1. Gettys is one of the keepers of the Flame (USENIX's 1999 Lifetime Achievement Award) on behalf of The X Window System Community at Large.
Abstract: VOIP and teleconferencing often perform much more poorly on today's Internet than the Internet of a decade ago, despite great gains in bandwidth. Lots of fiber, cheap memory, smart hardware, variability of wireless thoughput, changes in web browser behaviour, changes in TCP implementations, and a focus on benchmarking Internet performance solely by bandwidth, and engineer's natural reluctance to drop packets have conspired to encourage papering over problems by adding buffers; each of which may introduce latency when filled.



Buffering mistakes have been made in all technologies: operating systems, home routers both wired and wireless, broadband equipment, corporate networks, 3G networks and parts of the core Internet itself. The mistaken quest to never drop packets has destroyed interactivity under load, and often results in actual higher packet loss, as TCP's congestion avoidance algorithms have been defeated by these buffers. The lessons of the "RED manifesto" of 1997 have been forgotten or never learned by a new generation of engineers.


Full solutions require careful queue management, and that management should be everywhere; we no longer have the luxury to think that this is a problem solely of Internet routers.
Files: youtubeBufferbloat: "Dark" Buffers in the Internet
pdfGettys(PDF)
Sponsors: None.

Back to NANOG52 agenda.

NANOG52 Abstracts

  • NOGLab
    Sponsors A10 Networks, Alcatel-Lucent, ARRIS, and Comcast.
  • Opening Remarks
    Speakers:
    David MeyerCisco/UO and Chair, NANOG Program Committee; .
    James TindallAlcatel-Lucent; .
  • Opening Remarks
    Speakers:
    David MeyerCisco/UO and Chair, NANOG Program Committee; .
    James TindallAlcatel-Lucent; .
  • World IPv6 Day Experiences
    Moderators:
    Phil RobertsInternet Society; .
    Panelists:
    Igor GashinskyYahoo!; .
    Patrick GilmoreAkamai; .
    John BrzozowskiComcast; .
    Jon WoolwineCisco; .
  • World IPv6 Day Experiences
    Moderators:
    Phil RobertsInternet Society; .
    Panelists:
    Igor GashinskyYahoo!; .
    Patrick GilmoreAkamai; .
    John BrzozowskiComcast; .
    Jon WoolwineCisco; .
  • World IPv6 Day Experiences
    Moderators:
    Phil RobertsInternet Society; .
    Panelists:
    Igor GashinskyYahoo!; .
    Patrick GilmoreAkamai; .
    John BrzozowskiComcast; .
    Jon WoolwineCisco; .
  • World IPv6 Day Experiences
    Moderators:
    Phil RobertsInternet Society; .
    Panelists:
    Igor GashinskyYahoo!; .
    Patrick GilmoreAkamai; .
    John BrzozowskiComcast; .
    Jon WoolwineCisco; .
  • World IPv6 Day Experiences
    Moderators:
    Phil RobertsInternet Society; .
    Panelists:
    Igor GashinskyYahoo!; .
    Patrick GilmoreAkamai; .
    John BrzozowskiComcast; .
    Jon WoolwineCisco; .
  • NOGLab
    Sponsors A10 Networks, Alcatel-Lucent, ARRIS, and Comcast.
  • NOGLab
    Sponsors A10 Networks, Alcatel-Lucent, ARRIS, and Comcast.
  • Track: ARMD
    Speakers:
    Benson SchliesserCisco Systems, Inc.; .
  • Capacity Planning Panel
    Moderators:
    Vishal Sharma, Metanoia; Panelists:
    Arman Maghbouleh, Cariden; Dave Wang, Wandl; Duke Fisher, Verizon Business; Thomas Lundstrom, Qwest;
  • Capacity Planning Panel
    Moderators:
    Vishal Sharma, Metanoia; Panelists:
    Arman Maghbouleh, Cariden; Dave Wang, Wandl; Duke Fisher, Verizon Business; Thomas Lundstrom, Qwest;
  • Capacity Planning Panel
    Moderators:
    Vishal Sharma, Metanoia; Panelists:
    Arman Maghbouleh, Cariden; Dave Wang, Wandl; Duke Fisher, Verizon Business; Thomas Lundstrom, Qwest;
  • Capacity Planning Panel
    Moderators:
    Vishal Sharma, Metanoia; Panelists:
    Arman Maghbouleh, Cariden; Dave Wang, Wandl; Duke Fisher, Verizon Business; Thomas Lundstrom, Qwest;
  • Capacity Planning Panel
    Moderators:
    Vishal Sharma, Metanoia; Panelists:
    Arman Maghbouleh, Cariden; Dave Wang, Wandl; Duke Fisher, Verizon Business; Thomas Lundstrom, Qwest;

 

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