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User-Level Performance Monitoring Programme Cees de Laat Hans Blom PowerPoint PPT Presentation


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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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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

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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