1 / 9

PFLDnet 2007 International workshop on protocols for fast long-distance networks

PFLDnet 2007 International workshop on protocols for fast long-distance networks 7-9 February, Los Angeles. TCP algorithms. Fairness. Hardware – a good interaction (rare!). An experiment shows something odd.

normannelson
Download Presentation

PFLDnet 2007 International workshop on protocols for fast long-distance networks

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. PFLDnet 2007 International workshop on protocolsfor fast long-distance networks 7-9 February, Los Angeles

  2. TCP algorithms

  3. Fairness

  4. Hardware – a good interaction (rare!)

  5. An experiment shows something odd... Input rate | C flow 1 | C flow 2 A B | Av Max Min | Av Max Min1000 1000 | 800 988 666 | 188 323 0 800 800 | 197 197 197 | 792 791 0 500 500 | 494 494 494 | 494 494 494 800 600 | 569 574 566 | 419 423 414 What was expected if switch queuing was fairInput rate | C flow 1 | C flow 2 A B | Av Max Min | Av Max Min1000 1000 | 500 500 500 | 500 500 500 800 800 | 500 500 500 | 500 500 500 500 500 | 500 500 500 | 500 500 500 800 600 | 600 600 600 | 400 400 400

  6. ... and we learn something new From: Val Oliva Sent: Tuesday, February 13, 2007 10:46 AM To: Gordon Vick; Bob Schiff; David White Subject: Re: Performance of FESX424 I read the results and it is not clear to me were we failed. I mean, here’s what I saw: 1. The software used, 2.0.00, was very old. 2. We have features such as Dynamic Buffer Allocation that allows for oversubscription. Albeit available, the default DBA settings were meant for line rate performance and not oversubscribed conditions. 3. Non-blocking switches operate at a faster clock, and don’t work well when host are slow to send packets (or have increased IPG). Again, the FESX’s IPG can be tuned. Foundry knows the requirements for Grid Computing and that is why we have those features. Foundry also knows the requirements for VoIP (a mass market) and our switches default setting are tuned for that market.

  7. Testing

  8. Web sites 5th wil.cs.caltech.edu/pfldnet2007 4th www.hpcc.jp/pfldnet2006 3rd www.ens-lyon.fr/LIP/RESO/pfldnet2005 2nd www-didc.lbl.gov/PFLDnet2004 1st datatag.web.cern.ch/datatag/pfldnet2003 6th University of Manchester, UK, February 2008 Announcement on end2end-interest at postel org

More Related