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Presentation to Mr. Anwar Amjad _IT Consultant HEC_

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Presentation to Mr. Anwar Amjad _IT Consultant HEC_ Powered By Docstoc
					                       PingER Project
• Arguably the world’s most extensive active end-to-end
  Internet Performance Project
  – Digital Divide emphasis
  – Partially funded by MoST, US State Department
     • Last three years a joint development effort of SLAC & NIIT
     • Many NIIT students cut their teeth on it, many papers, presentations
• Results:
  – Highly successful
  – Identified & quantified rates of improvement for
    regions/countries
     • How far behind, catching up, falling behind
     • Many presentations to funding agencies, politicians, NRENs,
       recommendations
  – Case studies identified: fragility of e2e connections, last mile
    congestion problems, inefficient routing
                   PingER Methodology
                Uses ubiquitous ping




Monitoring                        Internet Remote
host                                       Host
                                           (typically
                                           a server)



Data Repository @ SLAC

             Measure Round Trip Time & Loss
                     Architecture
• Monitor hosts send 21 pings each 30 mins to Remote
  Hosts and cache results
• Archive hosts gather data daily, save, analyze & make
  results available publicly via web
              PingER Deployment
• PingER project originally (1995) to measure
  network performance for US, Europe and Japanese
  HEP community
• Extended this century to measure Digital Divide:
  – Collaboration with ICTP Science Dissemination Unit
    http://sdu.ictp.it
  – ICFA/SCIC: http://icfa-scic.web.cern.ch/ICFA-SCIC/
• >120 countries (99% world’s connected population)
• >30 monitor sites in 14 countries
• Monitor 44 sites in
  S. Asia
                                              Time
                                             Series
                                             results




• Divides into 2
  – India, Maldives, Pakistan, Sri Lanka
  – Bangladesh, Nepal, Bhutan, Afghanistan
• Weekend vs. weekday indicates heavy congestion
                            • All pings of a set fail ≡
Unreachability                unreachable
                            • Shows fragility, ~ distance
                              independent
                            • Developed regions US, Canada,
                              Europe, Oceania, E Asia lead
                                    – Factor of 10 improvement in 8 years
                                                                  • Africa, S.
      SE Asia
                             C Asia         L America    M East     Asia
 Oceania
                                   S Asia
                                                                    followed by
                                                                    M East & L.
SE Europe
                                                                    America
                Russia
                                                                    worst off
                                                         Developing
                                            Africa       Regions
       E Asia
                                                        Developed
            US & Canada
                          Europe                        Regions• Africa NOT
                                                                    improving
World thruput seen from US
                      Throughput ~
                      1460Bytes /
                      (RTT*sqrt(loss))
                      (Mathis et al)

                        Behind Europe
                      6 Yrs: Russia,
                        Latin America
                      7 Yrs: Mid-East,
                        SE Asia
                      10 Yrs: South Asia
                      11 Yrs: Cent. Asia
                      12 Yrs: Africa
                          South Asia,
                       Central Asia, and
                         Africa are in
                       Danger of Falling
                         Even Farther
                           Behind
                          Conclusions
• Last mile problems, network fragility, poor routing
• Decreasing use of satellites, expensive, but still needed
  for many remote countries in Africa and C. Asia
• Africa ~ 10 years behind and falling further behind,
  leads to “information famine”
• Africa big target of opportunity
  – Growth in # users 2000-2005 200%, Africa 625%
  – Need more competitive pricing
     • Fibre competition, government divest for access, low cost VSAT
       licenses
     • Consortiums to aggregate & get better pricing ($/BW reduces with BW)
  – Need better routing - IXPs
  – Need training & skills for optimal bandwidth management
• Internet performance correlates strongly with UNDP & ITU
  development indices
  – Increase coverage of monitoring to understand Internet performance
             Application to PERN
• Place PingER monitoring node(s) inside PERN
  – V. modest host, trivial install
  – Add traceroute/landmark server for geolocation
• PERN configures to monitor to border routers &/or
  to end hosts at sites (e.g. site web servers)
• Currently gathers data daily, analyze, present via
  SLAC/FNAL
• NIIT/SLAC plans to develop front end to
  analyze/visualize results on real time basis using
  cached data & RRD/smokeping
              perfSONAR: Next
             Generation Network
                 Monitoring

• Partnership of Internet2 (US), GEANT (EU), ESnet
  (US), RNP (Brazil)
  – Plus in the US: SLAC, U Delaware, GATech
  – 13 EU related NREN deployments of perfSONAR
                       Why is this hard?
• Internet very diverse, hard to find “invariants, phone models do not
  work
• Constantly changing both short and long-term
   – Changes are not smooth but usually in steps, findings may be out of date
• No central organization
   – Scientific communities span multiple organizations in many countries
   – Typical path requires crossing at least 5 administrative domains (campus,
     regional, backbone, regional and campus)
   – Domains are autonomous
• Measurement not high on vendor’s priorities
• ISP’s concerned about privacy, competitive advantage, public
  embarrassment
• Diagnosis hard:
   – Convince ADs there is a problem and that they could/should help
   – Need multiple pieces of information from multiple sources (ends, multiple
     middles…), with no coordinating body
   – Gets even harder for layer 2 networks
                  New Proposal to Address
• Widespread demand for net info by:
  –   Researchers to know how network is performing
  –   Advanced net apps such as Grids (e.g. place data)
  –   Net Ops staffs to diagnose problems
  –   Education
• Flexibility in extracting net performance data, needed since
  – Network changes quickly, diagnostic data is moving target
  – New tools, metrics and types of analysis are constantly developed
  – Lack of effective ways to share performance data across domains
              perfSONAR Infrastructure
Provide/Enable Measurement Points and Archives
• Provide Authentication/Authorization
• Provide registration, discovery & distributed lookup
  services
• Provide open set of protocols + reference implementation
  for cross-domain sharing of network measurements
  – Common performance middleware
  – Open Grid Forum NMWG = extensible XML data representation
  – All development is open source to encourage widespread
    development, deployment, ownership & involvement
• Early framework prototypes deployed in Europe, N and S
  America (Brazil), also adopted by LHC
                             Next Steps
• Develop scalable, distributed, redundant Federated Lookup Service
  (like DNS)
• Integrate common, existing authentication management into
  perfSONAR
• Design and build the Resource Protector to implement policy
• Provide specific, useful example diagnostic services as high quality
  examples (e.g. for traceroute, ping, one-way delay, SNMP, Layer-2
  link services etc.)
• Provide a Topology service to provide layer-2 & 3 interconnection
  information
• Promote perfSONAR to research community
   – Students get reliable data from perfSONAR, request on demand
     measurements, provide new analyses
• Turn into hardened/production quality distributable code
             Impact NRENs & Customers
• R&E relies on reliable networking.
  – Debugging problems across domains extraordinarily
    difficult today, increased switched networks will make
    harder.
• PerfSONAR enables divide and conquer between
  end & intermediate points:
  – provides easy access to relevant data enables on
    demand measurements
  – reduces need to coordinate multi-domain admins
    (scientist > local net admin > Regional net admin
    Backbone admin > …), telephone tag, explaining
  – Reduces participants, hours, days, frustration etc
                Benefits Pakistan
• Better understanding of customer experience and
  needs:
  – utilization, use patterns, event detection, problem
    diagnosis, planning
• Development of better measurement tools, analysis,
  visualization
• Pakistan part of major international community of
  NRENs, a partnership of users and providers
  – In Europe, U.S. and S. America
  – Worldwide R&E people demanding better services
• Pakistan research & education access to data to
  analyze
                 Benefits Education
• NIIT/SLAC proven track record delivering results
  – 6 students, all will return to Pakistan
  – 3 at SLAC now
  – 1 In Silicon valley start-up, 1 in Oxford, 1 returned to
    NIIT to pursue PhD
• Students get exposure to National Lab and world
  leading researchers
• Courses at Stanford
• Hands on exposure to production high speed
  networks such as are planned for Pakistan
                One Big Challenge
• Elegant graphics are great to understand problems
  BUT:
  – Can be thousands of graphs to look at (many site pairs,
    many devices, many metrics)
  – Need automated problem recognition AND diagnosis
• So developing tools to reliably detect significant,
  persistent changes in performance
  – Initially using simple plateau algorithm to detect step
    changes
• Provide reliable alerts
• Automatically partially diagnose events
  – Gather info from routers, monitors etc and eliminate less
    likely causes
                What do we want from you
• Now:
  – Installation and administration of PingER monitoring host
    (s) inside PERN
  – Installation & admin of traceroute/landmark servers in
    major PERN PoP/cities
  – Chairman HEC asked for proposal to HEC for
    perfSONAR, will embed PERN requirements in proposal
  – PERN needs to partner with NIIT/SLAC
     • Discuss Contributions from PERN
• Later:
  – Deployment of Measurement Points within PERN
Additional Slides
                    More information/Questions
• Acknowledgements:
   – Harvey Newman and ICFA/SCIC for a raison d’etre, ICTP for
     contacts and education on Africa, Mike Jensen for Africa
     information, NIIT/Pakistan for developing valuable tools, Maxim
     Grigoriev (FNAL), Warren Matthews (GATech) for ongoing code
     development for PingER, USAID MoST/Pakistan for development
     funding, SLAC for support for ongoing management/operations
     support of PingER
• PingER
   – www-iepm.slac.stanford.edu/pinger, sdu.ictp.it/pinger/africa.html
• Human Development
   – http://www.gapminder.org/
• Case Studies:
   – https://confluence.slac.stanford.edu/display/IEPM/Sub-
     Sahara+Case+Study
   – http://sdu.ictp.it/lowbandwidth/program/case-studies/index.html
                  Costs compared to West
• Sites in many countries have bandwidth< US residence
   – “10 Meg is Here”, www.lightreading.com/document.asp?doc_id=104415




• Africa: $5460/Mbps/m
   – W Africa $8K/Mbps/m
   – N Africa $520/Mbps/m
• Often cross-country
  cost dominates cf.
  international
1 yr of Internet access > average annual income of most Africans,
Survey by Paul Budde Communnications
                 • A long and healthy life, as measured by life
  UNDP Human       expectancy at birth
                 • Knowledge, as measured by the adult literacy
  Development      rate (with two-thirds weight) and the combined
                   primary, secondary and tertiary gross enrolment
                   ratio (with one-third weight)
   Index (HDI)   • A decent standard of living, as measured by
                   GDP per capita.
Africa




PingER
- Strong
Correlation
- Non
subjective
- Quicker /
easier to
update
                     Med. & Africa vs HDI
• N. Africa has 10 times poorer performance than Europe
• Croatia has 13 times better performance than Albania
• Israel has 8 times better performance than rest of M East
  Med. Countries
• E. Africa poor,
  limited by
  satellite access
• W. Africa big
  differences,
  some (Senegal)
  can afford SAT3
  fibre others use
  satellite
• Great diversity
  between &
  within regions
                  Digital Access Index (DAI):
     Infrastructure availability, Affordability of access,
        Education, Quality of ICT, & Internet usage
Europe, E Asia       Strong positive linear correlation,
(except China),
Oceania top right
Israel & Singapore
with top group
Middle East in
middle, Iran
poorest
Africa bottom left
S. Asia split:
Bhutan, Nepal,
Bangladesh with
Africa
India, Pak, Sri
Lanka better
                                  C Asia
DAI & S. Asia
                   Why does it matter: Business
•G8 specifically pledged support for African higher education and
research by “Helping develop skilled professionals for Africa's
private and public sectors, through supporting networks of
excellence between African's and other countries' institutions of
higher education and centres of excellence in science and
technology institutions” G8 specifically pledged support for African
higher education and research by “Helping develop skilled professionals
for Africa's private and public sectors, through supporting networks of
excellence between African's and other countries' institutions of higher
education and centres of excellence in science and technology Prahalad and Hart
institutions”                                Traditional MNC
                                                Business Model       >$20K per year
                                                                 75 to 100 million people

•Saturating western markets                    Some MNCs
•High growth IT markets: BRIC                                       >$1,500 - 20K per year
                                                                    1.5 to 1.75 billion people
•NOT business as usual                         Local Firms

 – New business models                           Future
 – Distinct needs                             Opportunity?               <$1,500 per year
                                        Karen Coppock                     4 billion people
 – Dearth of distribution channels      RDVP, Stanford
              Experimental Alerting
• Have false positives down to reasonable level (few
  per week), so sending alerts to developers
• Saved in database
• Links to traceroutes, event analysis, time-series
                Normalized for Details
• Note step
  changes
• Africa v.
  poor
• S. Asia
  improving
• N. America,
  Europe, E
  Asia,
  Oceania
  lead

				
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posted:6/6/2013
language:English
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