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DataGrid Wide Area Network Monitoring Infrastructure (DWMI) aka IEPM-BW

DataGrid Wide Area Network Monitoring Infrastructure (DWMI) aka IEPM-BW. Connie Logg February 13 and 17, 2005. History. Originally done for SC2001 demo and called IEPM-BW After SC2001, development continued FNAL picked up IEPM-BW and adapted it to their site

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DataGrid Wide Area Network Monitoring Infrastructure (DWMI) aka IEPM-BW

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  1. DataGrid Wide Area Network Monitoring Infrastructure(DWMI) aka IEPM-BW Connie Logg February 13 and 17, 2005

  2. History • Originally done for SC2001 demo and called IEPM-BW • After SC2001, development continued • FNAL picked up IEPM-BW and adapted it to their site • In Spring 2004 – redesigned for TeraPaths monitoring project • Currently still called IEPM-BW, and deployed at 4 sites

  3. Architecture - I • Use MySQL database • All configuration is in the database so the code can self configure • Allows flexibility for adding new types of data • Written in perl • Low impact probes (currently abwed, traced, and pingd) have daemons that run independently • High impact probes have a daemon (bw-synchd) which insures that high impact probes do not run simultaneously and that there is a break between each test.

  4. Architecture - II • Results from all probes written to a data directory and are loaded by load-datad daemon which assures that the data base is not bombarded by hundreds of writes simultaneously. • Analysis scripts run every hour or two depending upon how long they take • Plot data, traceroute reports, master web page generation

  5. MySQL Database Tables - I • NODES – Each node has an entry and its specs (latitude, longitude, contact, paths, et al.) • MONHOST – Active monitoring host(s) information (web/cgi paths, data analysis specs, et al.) • TOOLSPECS – Probe specifications (probe, probe options, frequency, testtype, et al.)

  6. MySQL Database Tables - II • Many types of tests possible • background – low impact tests which can run concurrently (traceroute, ping, abwe) • background-syn – Tests which must be run one at a time (iperf) • On demand – to be implemented

  7. MySQL Database Tables - III • SCHEDULE • scheduler inserts probe requests into the SCHEDULE • Daemons read SCHEDULE table for the probes they are responsible for within the “current” timeframe, and run the probes. All results are written to a data directory and loaded by the data loading daemon

  8. APIs and other utilities • Fetch-ping-data • Fetch-abwe-data • Fetch-trace-data • Fetch-bw-data (e.g iperf) • Fetch-trace-data • Etc.. • All take a nodename and timespan and return a filename where the data is stored

  9. Data Analysis • Time series plots – group and individual • Diurnal analysis & fitting • Traceroute analysis • Bandwidth Change Analysis – will be augmented by other methods currently be researched and developed

  10. CGI Utilities – in development • Add and update NODES • Add and update TOOLSPECS • Add and update MONHOST • Interactive data analysis

  11. Informational Web Pages • Table of defined NODES • Table of defined MONHOST • Table of TOOLSPECS – probe specifications • Description of data base tables • Report on data logging for past few weeks • PLM – needs updating • Others to come – every time I have to look at something for validation, I create a web page

  12. Futures • Make data available via web services • Interactive data analysis CGIs • Add additional probe types • Develop complete distribution kit – complicated by differing locations and versions of perl, gnuplot, mysql, graphics libs, ploticus, iperf, etc. • Add additional anomaly detection techniques

  13. Summary • The objective is to provide for regular and reliable network probe testing and data collection from several locations around the world • Make the data available to the community • Provide a framework for the incorporation of a variety of analysis tools

  14. Acknowledgements • Many people have contributed content to this system over the years Maxim Grigoriev (FNAL), I-Heng Mei (SLAC RA), Manish Bhargava (SLAC RA), Ruchi Gupta (SLAC RA) Mahesh Chhaparia (SLAC RA) Parakram Khandpur (SLAC RA) And of course: Les Cottrell

  15. Questions & Considerations • BWCTL – • not installed everywhere and it is one more thing I would need to install as part of the distribution kit and maintain • Does not do multiple iperf streams • May want other heavyweight tests that bwctl does not provide for • OWAMP – special NTP configuration

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