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Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
Active Network Performance Testing
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Active Network Performance Testing

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    1. NASA EOS Active Network Performance Testing Andy Germain Swales Aerospace 23 August 2001 [email_address] 301-902-4352
    2.  
    3. <ul><li>Created in 1984 </li></ul><ul><li>39 organizations involved </li></ul><ul><li>Goals: </li></ul><ul><ul><li>To optimize benefits of space-borne Earth observations </li></ul></ul><ul><ul><li>To serve as focal point for international coordination of such observations </li></ul></ul><ul><ul><li>To exchange policy and technical information to encourage complementarily among space systems </li></ul></ul>CEOS Overview ASI (Italy) BNSC (UK) CAST (China) CSA (Canada) CNES (France) CSIRO (Australia) DLR (Germany) EC (Europe) ESA (Europe) EUMETSAT (Eur.) INPE (Brazil) ISRO (India) NASDA (Japan) NASA (US) NOAA (US) NRSCC (China) NSAU (Ukraine) STA/NASDA (Japan) Roshydromet (Russia) RSA (Russia) SNSB (Sweden) MEMBERS ASSOCIATES CRI (N.Zealand) CCRS (Canada) GCOS GOOS GTOS ICSU IGBP IOC ISPRS NSC (Norway) OSTC (Belgium) SAC/CSIR (S.A.) UN-ESCAP UN-FAO UN-OOSA UNEP WCRP WMO
    4. CEOS Organization COMMITTEE ON EARTH OBSERVATION SATELLITES TERRAIN MAPPING MICROWAVE SENSORS SAR CALIBRATION OPTICAL SENSORS NETWORK ACCESS DATA LAND SURFACE PARAMETER VALIDATION WORKING GROUP ON INFORMATION SYSTEMS AND SERVICES (WGISS) WORKING GROUP ON CALIBRATION AND VALIDATION (CAL/VAL)
    5. Integrated Global Observation Strategy IGOS- Partners CEOS Science Themes WGISS GTOS IGBP GOFC NAKODO WTF-G Others... Sub-groups WGCV (Matchmaker) <ul><li>Goals: </li></ul><ul><li>To provide comprehensive framework to harmonize interest of </li></ul><ul><li>major space-based and in-situ systems for Earth observation </li></ul><ul><li>To improve observing capacity and deliver observations in a </li></ul><ul><li>cost-effective and timely fashion to users and policy makers </li></ul>
    6. CEOS WGISS Access Subgroup <ul><li>Develops methods for integrated access to CEOS members’ data: </li></ul><ul><ul><li>World Wide Web Access </li></ul></ul><ul><ul><li>CEOS information resources </li></ul></ul><ul><ul><li>International Directory Network (IDN) </li></ul></ul><ul><ul><li>Catalog Interoperability (CINTEX) </li></ul></ul><ul><ul><ul><li>Catalog Interoperability protocol (Z39.50) </li></ul></ul></ul><ul><ul><li>Data and Information Access Link (DIAL) </li></ul></ul><ul><ul><li>WGISS Test Facility </li></ul></ul>
    7. Access Subgroup: World Wide Web Task Team <ul><li>Objectives: </li></ul><ul><ul><li>To investigate and coordinate the implementation of WWW access to international Earth observation catalogue systems and data access systems. </li></ul></ul><ul><ul><li>To perform outreach to external organizations capable of influencing WWW technology evolution </li></ul></ul><ul><li>Simple HTTP Based Search Protocol </li></ul><ul><ul><li>Low level http mechanism for remotely searching catalogs and databases </li></ul></ul><ul><ul><li>Standardize the interface for space, time & free text searching </li></ul></ul><ul><ul><li>Low buy in cost for suppliers </li></ul></ul><ul><ul><li>Protocols in use at CCRS and CEO, unification details agreed upon </li></ul></ul>
    8. Information Management Data Hierarchy <ul><li>Directory </li></ul><ul><ul><li>provides concise high-level information about data sets. </li></ul></ul><ul><ul><li>GCMD, CEOS IDN </li></ul></ul><ul><li>Guide </li></ul><ul><ul><li>provides detailed descriptions about data sets, platforms, sensors, projects, and data centers </li></ul></ul><ul><li>Inventory (Catalog) </li></ul><ul><ul><li>descriptions of specific observations or collections of observations of data (granules) that are available for request from a data archive. </li></ul></ul><ul><ul><li>Information Management System (IMS) </li></ul></ul><ul><li>Browse Products </li></ul><ul><ul><li>reduced resolution images as an aid to data selection </li></ul></ul><ul><li>Data Products (Granules) </li></ul><ul><ul><li>via media (custom or standard) or network </li></ul></ul>
    9. CEOS International Directory Network
    10. CEOS WGISS Network Subgroup <ul><li>Resource planning and management for CEOSnet, a virtual private network </li></ul><ul><li>Performance measurement of network links </li></ul><ul><li>Network Security (CEOS context) </li></ul><ul><li>Collaboration on Next Generation networks and international prototyping </li></ul><ul><li>Network support for Access Subgroup projects and CEOS demos </li></ul>
    11. EOS Performance Test Sites EOS DAAC NASA Nodes SCFs QA Other Key: ORST UCSB Ariz LANL Wisc Miami SUNY-SB BU GSFC LaRC EDC MSFC, NSSTC NCAR Mont JPL Toronto Colo St. Niagara ASF Chicago Other Nodes SLAC NSIDC NMEX CCRS UVA UMD GPN NGDC, NOAA USF RSS Texas UCSD Wash Mich NOAA Ohio
    12. EOS International Test Sites EOSDIS Mission Partner CEOS PI: QA/IST GSFC CCRS JPL NASDA (ADEOS, TRMM, Aura, Aqua) CSIRO ESRIN INPE (Aqua), IDN CONAE IRE-RAS Israel ASF NSIDC EDC LaRC MITI (Terra) CAO (SAGE III) RAL, OXFORD (Aura) Toronto (Terra) UCL (Terra) JRC UNEP UNEP UNEP AIT, RFD, GISTDA UNEP UNEP KNMI (Aura)
    13. Virtual CEOSnet - April 2001 UNEP CSIRO (Australia) DFN JARING (Malaysia) Miami DC Geneva NYC Abilene STAR TAP ATT.net CCRS CMA (China) Optus Cable & Wireless CONAE (Argentina) Rostelecom SFO Chicago START (Thailand) PAO (Philipines) UCL NASDA IMNet KNMI DANTE (TEN-155) Israel JRC GARR Milan DFN DLR ESRIN Commodity ISPs ( BBNPlanet, Verio, etc.) MIPT Moscow IRE-RAS EUmetsat Swisscom Nairobi Bangkok SJCR Beijing Norway TelintAr ANSP INPE (Brazil) NISN TransPAC (APAN) WIDE UMD Oxford RAL MAFF CAO EDC MSFC/UAH MSU CNES France Telecom Sprintlink (Paris) AIT NorduNet X X NY UNInet GSFC LaRC MAX GISTDA CA*NET3 UUNet SURFnet JANET ILAN Qwest MIRNET Teleglobe GPN MichNet MAE-E Wash DC vBNS+ UNINET
    14. Test Overview <ul><li>End-to-end user level test </li></ul><ul><ul><li>“ Active” testing </li></ul></ul><ul><ul><li>little or no visibility into network internals </li></ul></ul><ul><li>Purposes </li></ul><ul><ul><li>EOS: assess whether networks as implemented meet EOS requirements </li></ul></ul><ul><ul><li>CEOS: assess whether networks can support intended applications </li></ul></ul><ul><ul><li>Resolve user complaints: </li></ul></ul><ul><ul><ul><li>Network problems -- or somewhere else?? </li></ul></ul></ul><ul><ul><li>Determine bottlenecks -- seek routing alternatives </li></ul></ul><ul><ul><li>Provide a basis for allocation of additional resources </li></ul></ul>
    15. Test Process <ul><li>Test script runs hourly to each site: </li></ul><ul><li>Traceroute (1 way) </li></ul><ul><ul><li>Number of hops -- route stability --> Hops Chart </li></ul></ul><ul><li>Pings </li></ul><ul><ul><li>100 pings prior to thruput test or 100/300 during </li></ul></ul><ul><ul><li>Round Trip Time --> RTT Chart </li></ul></ul><ul><ul><li>Packet Loss --> Packet Loss Chart </li></ul></ul><ul><li>TCP Throughput </li></ul><ul><ul><li>TCPwatch, Iperf, or FTP --> Thruput Chart </li></ul></ul><ul><ul><li>requires cooperating client at destination </li></ul></ul><ul><ul><li>TCPwatch / Iperf keeps send buffer full for 30 Seconds </li></ul></ul><ul><ul><li>Netstat -> packets retransmitted (if pings blocked) </li></ul></ul>
    16. On line results <ul><li>Updated Daily </li></ul><ul><ul><li>http://corn. eos . nasa . gov /networks </li></ul></ul><ul><ul><li>&quot;Network Health Statistics&quot; </li></ul></ul><ul><ul><ul><li>GSFC Sites </li></ul></ul></ul><ul><ul><ul><li>EOS Sites </li></ul></ul></ul><ul><ul><ul><li>EMSNet Sites </li></ul></ul></ul><ul><ul><ul><li>CEOS Sites </li></ul></ul></ul><ul><ul><ul><li>Other sites </li></ul></ul></ul><ul><ul><li>Charts: All sources to specified destination </li></ul></ul><ul><ul><ul><li>Thruput, RTT, Packet Loss, Hop Count </li></ul></ul></ul><ul><ul><ul><ul><li>Weekly: 24 measurements per day from each source </li></ul></ul></ul></ul><ul><ul><ul><ul><li>60 day: Daily Average </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Yearly (RSN) </li></ul></ul></ul></ul>
    17. Technical Notes <ul><li>Each data source plotted in the same color on all charts </li></ul><ul><li>Concurrent Pings: </li></ul><ul><ul><li>GSFC, LaRC, EDC DAACs (300), GSFC-Destr (100) </li></ul></ul><ul><li>No Pings: </li></ul><ul><ul><li>MODIS sources, a few destinations </li></ul></ul><ul><ul><li>Calculate Retransmission % instead of packet loss % </li></ul></ul><ul><li>FTP: </li></ul><ul><ul><li>Gila to international destinations, </li></ul></ul><ul><ul><li>CAO to LaRC </li></ul></ul><ul><li>Window size typically set to be 2 x delay * BW </li></ul><ul><ul><li>No control of window size on FTP, Solaris, Linux sources </li></ul></ul>

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