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User-Level Performance Monitoring Programme Cees de Laat Hans Blom

1 of 6. User-Level Performance Monitoring Programme Cees de Laat Hans Blom. Utrecht University. Contents of this talk. 2 of 6. This space is intentionally left blank. History. DAS project 4 computer clusters on 4 different universities Connected via "internet" and ATM

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User-Level Performance Monitoring Programme Cees de Laat Hans Blom

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  1. 1 of 6 User-Level Performance Monitoring Programme Cees de Laat Hans Blom Utrecht University

  2. Contents of this talk 2 of 6 • This space is intentionally left blank

  3. History • DAS project • 4 computer clusters on 4 different universities • Connected via "internet" and ATM • Prove QoS advantage • Management level WWW screen to see if links are up • Dynacore • Remote Control • Video conferencing • Distributed databases • CORBA/Objectivity • Pseudo real time operation • Requirement minimal 10 Mbit/s • Juelich - Utrecht • Weekdays often around 30 - 60 kbit • Was not a local problem, occurred in other German-Dutch projects

  4. Tector 3 of 6

  5. Teleoperation 4 of 6 Jülich Remote Diagnostic TEXTOR Control Visualisation DAQ REMOT Broker Dbs DAQ DAQ Dbs REMOT broker REMOT broker REMOT Broker Dbs A/V A/V A/V Network services

  6. USA line Multi Kingdom Problem 5 of 7 Physics-UU to IPP-FZJ => 7 kingdoms • Netherlands • Physics dept • Campus net • SURFnet • Europe • TEN 155 • Germany • WINS/DFN • Juelich, Campus • Plasma Physics dept 3 ms 2.5 ms 17 ms • Jülich

  7. rTPL package 6a of 7 user account, open for rsh modified netperf + ping Host Host Host idem user account, open for rsh modified netperf + ping idem Host idem Host rsh to initiate measurements collect data WWW server->applet ->brouwser

  8. rTPL @ work 6b of 7 • Every hour: • Controlling host contact host from list • Netperf to other hosts for about 10 sec • 40 ping's to other hosts • Collect data • Contact next host in list • Builds matrix from/to • Not all elements need to be filled • data compressed in zip file • Load on network ~ 1% • User display • User contacts WWW server at controlling host • User gets applet • Applet loads last zipped data file containing a week of data • Older data also loadable • Applet can average per week, per time of day, etc…

  9. Demonstration 6c of 7 This is the tricky part ….

  10. Conclusions 6d of 7 • Toolset rTPL • Flexible package • Unix knowledge essential (scripting) • User friendly • Can pinpoint performance problems if hosts well chosen • Performance • Network performance improved a lot (TEN 1.55 -> TEN 155) • Still not sufficient for full scale virtual lab • Modeling • How does end to end relate to per hop performance tp1 tp2 tp3 Host A Host B Tp = f( tp1 , tp2 , tp3 , ... )

  11. Acknowledgments 7 of 7 • This work is supported by • TERENA Technical Programme • SURFnet bv • European Commission, DG XIII • Telematics Applications Programme Telematics for Research • RE 1008 REMOT • RE 4005 DYNACORE • More info: • http://www.phys.uu.nl/~wwwfi/nettest • http://www.phys.uu.nl/~wwwfi/das • http://www.phys.uu.nl/~wwwfi • http://www.phys.uu.nl/~dynacore QUESTIONS ?

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