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NDT Administrator Tools

Explore NDT's administrator tools for self-testing, logging results, post-processing tasks, and rapid experimentation with new features and algorithms.

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NDT Administrator Tools

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  1. NDT Administrator Tools Jakub Slawinski <jeremian@poczta.fm> Rich Carlson <rcarlson@internet2.edu> Internet2 Fall Member Meeting October 9, 2007

  2. NDT Attributes • Users self-test using Java based client • Test results contain details about the test including indications about what could be wrong • Server automatically logs basic test results • Server can also log more detailed results for post-processing tasks

  3. Post Processing Tasks • Allow site administrators to find problems effecting multiple clients • Allow site administrators to verify that problems have been resolved • Allow developers to experiment with new detection algorithms • Allow developers to quickly test new features

  4. NDT Post Processing Tools • Genplot • Simply program to display Web100 data • Testing FrameWork (TFW)‏ • Set of python scripts to automate testing • JAnalyze • Java based version of Analyze program

  5. Genplot • Simple program to post-process Web100 data • Reads Web100 snaplog files • Textual display of requested variables • Graphical display of requested variables • Run time flags allow quick access to common variables

  6. Genplot – Textual Display • ‘genplot -tmCurCwnd,SlowStart,CongAvoid,CongestionSignals fn | less’

  7. Genplot – Graphical Display • ‘genplot –C fn; xplot fn.xpl’

  8. TFW • Set of python scripts to centralize and automate testing • Generate various data streams with configurable Bandwidth Utilization • Future Enhancements • Automatic NDT client/server start-up • Automatic fetching of test results

  9. TFW – adding traffic

  10. JAnalyze • Java GUI replacement for old Analyze program • Reads web100srv.log file for input • Filters can be applied to limit selection • Clicking on client address brings up test details • Xplot graphs for Web100 and TCPDUMP files easily available • Server CPU utilization graphs available • Rapid prototyping of new analysis algorithms

  11. JAnalyze

  12. JAnalyze - Filters • Limit client list based on • Client IP address • Fault condition (Duplex Mismatch, Congestion, …)‏ • Allows site administrators to quickly • Find problems effecting multiple users • Determine when a problem has been resolved

  13. JAnalyze - Web100 Data • Simple printing/plotting of Web100 data using the genplot tool • Display user defined variables • Single click to display CurCwnd vs time plot • Textual display in scrollable window

  14. JAnalyze - TCPDUMP • Simple printing/plotting of TCPTrace data • Single click to display server-to-client TCP throughput graph (“tcptrace –S” xplot)‏ • Single click to display textual information (“tcptrace –l” data)‏

  15. JAnalyze - CPU Utilization

  16. JAnalyze – New Analysis • Rapid prototyping of new analysis algorithms • Currently working on ‘Congestion Detected’ algorithm

  17. JAnalyze - Demo • The presentation will stop and I will demo the various components of the JAnalyze tool

  18. Gotcha’s • NDT-3.4.4 requires unixODBC-devel package • JAnalyze requires SUN Java SDK package • Must install xplot • http://www.xplot.org/ • Must install tcptrace • http://jarok.cs.ohiou.edu/software/tcptrace/download.html

  19. Acknowledgements • Jakub Slawinski • Google Summer of Code Student has done most of the coding for the past 2 years. • Developed JAnalyze and TFW tools • Made numerous enhancements to main NDT code

  20. Conclusion • Enhanced post-processing tools to aid Administrators • Identify problems that effect multiple clients • Identify when problems have been resolved • Enhanced post-processing and testing tools to aid Developers • Easy method to generate test data • Ability to rapidly experiment with new detection algorithms

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