1 / 17

Web100 at SLAC

Web100 at SLAC. Presented at the Web100 Workshop, Boulder, CO, August 2002. Overview. Review Web100 at SLAC Applications Results IEPM-BW MAGGIE. The Needs of HENP. BOF in Nebraska. SLAC is a data center. Transfer multiple TeraBytes to France, UK.

byrd
Télécharger la présentation

Web100 at SLAC

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. Web100 at SLAC Presented at the Web100 Workshop, Boulder, CO, August 2002.

  2. Overview • Review • Web100 at SLAC • Applications • Results • IEPM-BW • MAGGIE

  3. The Needs of HENP • BOF in Nebraska. • SLAC is a data center. • Transfer multiple TeraBytes to France, UK. • Need to optimally configure ftp-like applications to maximize throughput. • Track loss, RTT, throughput. • Modify streams and window size.

  4. Expectations • Take out the guess work • Maintain optimal parameters • Improve throughput

  5. Web100 at SLAC • Initial test and development machines. • Two main ‘production’ machines • Antonia, Hercules • Other testbed machines are web100-enabled by default. • Utilize Net100 extensions and turn off 2.4 caching.

  6. Application • webdump (tcpdump-like) program • Iperf • Short transfers dominated by slow start • Modify iperf to use web100 to identify when slow start has finished and report throughput

  7. Results • iperf vs web100 vs passive (netflow) • Stream by stream for a whole transfer • Not progressive

  8. Issues • Dynamically select CID • What is interesting ? • Real-time • Streams and Windows prediction

  9. IEPM-BW • Continuously operating high performance throughput measurement project. • Poor mans AIME (not funded by SciDAC). • Iperf, bbcp, bbftp, udpmon … • Track, compare, contrast • 3 Monitoring Sites (SLAC, FNAL, UMan) • I2, UMich, NIKHEF, APAN/JP • 33 Active Participants (US, Europe, Japan)

  10. IEPM-BW and WEB100 • Option to dump subset of stats to a file • Not default

  11. MAGGIE • Measurement and Analysis for the Global Grid and Internet End-to-end Performance. • Big sister of Active Internet Monitoring for ESnet (AIME). • 10-20+ NIMI hosts running periodic and on-demand measurements. • Feedback results to instrument tools and troubleshoot issues.

  12. MAGGIE+ • Atlas • Internet2 • Performance Analysis Stations • I2 E2E PI PE • PPDG • Work with these and others to create co-operative framework • Continue IEPM-BW work.

  13. Details • http://www-iepm.slac.stanford.edu • http://www-iepm.slac.stanford.edu/maggie • http://www-iepm.slac.stanford.edu/bw • http://www-iepm.slac.stanford.edu/bw/iperf_res.html

  14. Any Questions ?

More Related