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User-Level Performance Monitoring Programme Cees de Laat Hans Blom

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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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slide1
1 of 6

User-Level Performance Monitoring Programme

Cees de Laat

Hans Blom

Utrecht University

contents of this talk
Contents of this talk

2 of 6

  • This space is intentionally left blank
history
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
tector
Tector

3 of 6

teleoperation
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

multi kingdom problem
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

rtpl package
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

rtpl @ work
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…
demonstration
Demonstration

6c of 7

This is the tricky part ….

conclusions
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 , ... )

acknowledgments
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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