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PERT workshop. TERENA NETWORKING CONFERENCE 2010 30 May 2010. Bartek Gajda [email protected] Poznan Supercomputing and Networking Center (PSNC) PIONIER (Polish NREN). PERT workshop. Agenda. Introduction to PERT and eduPERT for newcommers Review of the current status

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PERT workshop

TERENA NETWORKING CONFERENCE 2010

30 May 2010

Bartek [email protected]

Poznan Supercomputing and Networking Center (PSNC)

PIONIER (Polish NREN)


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PERT workshop

Agenda

  • Introduction to PERT and eduPERT for newcommers

  • Review of the current status

  • Technical presentations and discussion from PERT teams

  • 15.30 Coffee break

  • Technical presentations and discussion part 2

  • 17.30 End


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PERT workshop

Agenda

  • Introduction to PERT and eduPERT for newcommers

  • Review of current status

  • Technical presentations and discussion from PERT teams

  • 15.30 Coffee break

  • Technical presentations and discussion part 2

  • 17.30 End


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What is PERT ?

  • PERT – The Performance Enhancement and Response Team

    • a virtual organization

    • made of networkingexperts

    • who help end-users diagnose and solve network performance issues.


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What is PERT ? (2)

  • End-user will contact the PERT either directly orthrough their standard IT support channels when their applications are not workingnormally

PERT

PERT

IT NOC


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What is PERT ? (3)

  • Typical areas of concern for users are:low throughput, slow response time for interactiveapplications and degradation (noise)

  • To diagnose such problems a PERT must consider the properties of thecomplete end-to-end path

  • One of the main functions of the PERT is to ask intelligent questions ofthose who have systems on that path, including end-users, system administrators, and network operators.


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Network Performance Problems

  • Historically:Local (LANs) networks were faster than long distance circuits (the “wide-area”) have been the bottleneck in a network

  • Today the difference in data rate between LANs and WANs is much reduced,

  • The capacity of WAN - long distance circuits has significantly increased

  • End-to-end performance bottle-necks may now occur at any point in a system – end-system (application, OS, hardware), LAN or WAN

  • It is becoming more and more difficult for a non-expert end-user to diagnose their network performance issues


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Network Performance Problems

  • The TCP performance problems had a wide variety of resolutions*:

  • 39% of the causes were solved by applying different network routing.

  • 27 % were related to TCP tuning on the end host.

  • 14 % were unidentified.

  • 11% were related to hardware issues.

  • 9% were solved by other solutions like resolving DNS performance problems.

  • *Milestones MS2.3.7 and 2.3.8:Specification of the Backbone and Campus PERT Support Monitoring Infrastructure


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Origins of the PERT

  • Conception of the PERT … Jan 01 Internet2 Meeting

    • Performance Enhancement and Response Team

    • To provide a support structure to investigate and resolve problems in the performance of applications over computer networks

    • Comparable to CERT structure

  • Realization of the PERT … Dec 2002 TERENA meeting

    • GARR, TERENA, DANTE, SWITCH, CESnet, HEAnet and UKERNA committed to a practical trial of a basic PERT


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The GEANT PERT2002-2004

  • Informal, unregulated access to PERT; anybody can request PERT’s help

  • PERT communicated via e-mail list

  • Primary purpose of investigation was to improve PERT’s knowledge and experience

  • Problems were addressed on a best efforts basis

  • No dedicated Monitoring tools

  • RoundUp tracking system (off-the-shelf) used


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The GEANT PERT2002-2004

  • The first practical implementation was done by a group of European National Research and Education Networks (NRENs) and DANTE

  • Successful pilot service in the GÉANT project

  • Centralized GN2 PERT concept evolved into federated eduPERT


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What is eduPERT?

  • Centralized GN2 PERT concept evolved into federated eduPERT

  • Combines the independent PERTs:

    • National (NREN)

    • Local (Universities)

    • Project PERTs

  • Support of central services:

    • Registration - registers new PERTs

    • Accreditation - provides application forms to PERTs seeking accreditation and awards and/or revokes accreditation according to agreed policy

    • Workshop, meetings

    • Knowledge Base

    • Reporting - compiles and submits monthly reports on eduPERT activity

    • Training


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The benefits of joining eduPERT

  • Access to the knowledge of experienced and/or qualified network engineers

  • Access to advice about TCP/IP protocols, network topology, network status and history, adjacent networks (peers and customers) and read access to all network elements.

  • Registered PERTs can access private contact details for all other registered and accredited PERTs, and can quickly and easily contact those engineers best placed to help investigate network performance issues.

  • Accredited PERTs can request specific technical information from other accredited PERTs and they have greater privileges when running multi-domain network performance tests.

  • eduPERT is a simple, unconstrained structure that maximises resources and creativity, with no restrictions on how member PERTs interact with its users, or what tools and procedures must be used

  • Training


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PERT workshop

Agenda

  • Introduction to PERT and eduPERT for newcommers

  • Review of current status

  • Technical presentations and discussion from PERT teams

  • 15.30 Coffee break

  • Technical presentations and discussion part 2

  • 17.30 End


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The GEANT PERT2009 - now

  • List of participating PERTs

    • ARNES (Academic and research network of Slovenia)

    • CSC (Finnish IT center for science administered by the Ministry of Education)

    • SWITCH* (Swiss Education Network)

    • RESTENA (Réseau Téléinformatique de l'Education Nationale et de la Recherche)

    • PIONIER (Polish Optical Internet)

    • FCCN (Fundação para a Computação Científica Nacional)

    • GÉANT2 PERT (GÉANT2, the high bandwidth, pan-European research network)

    • DFN (German Research and Education Network)

* accredited PERT


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eduPERT website - edupert.geant.net


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eduPERT website structure- edupert.geant.net

  • STRUCTURE

    • About

      • What is a PERT

      • What is eduPERT

      • The benefits of joining eduPERT

    • Services

      • eduPERT Services

      • GÉANT Services

    • eduPERT Knowledge Base

      • Links to The PERT Knowledge base hosted by SWITCH

    • Participating PERTs

      • List of PERTs

      • Participating PERTs details

        • (more details available only after loginfor registered participants )


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eduPERT Knowledge Base

  • Performance basics: How to report a performance problem, user-perceived performance (responsiveness, throughput, reliability), Why latency is important, the "Wizard Gap“

  • Network performance metrics: OWD, RTT (bandwidth*delay product and "Long Fat Networks" (LFNs)), delay varation (Jitter), loss, reordering, MTU/Path MTU

  • Network protocols

  • Application protocols

  • PERT Tools

    • NREN tools and statistics: GÉANT, SWITCH (CH), PSNC (PL), HEAnet (IE), ISTF (BG), FCCN (PT), IUCC (IL), HUNGARnet (HU), RENATER (FR)

  • Performance Case Studies

  • PERT Case Histories (old)


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eduPERTwithin GN3– latest update

  • Website moved to new doman edupert.geant.net

  • Discussion list reactivated

    • Open for subscribing

    • Publicly available archive

    • http://mail.geant.net/mailman/listinfo/pert-discuss

  • Documents for the communityMilestones MS2.3.7 and 2.3.8:Specification of the Backbone and Campus PERT Support Monitoring Infrastructure



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eduPERT – plans for the future

  • Additional 10 existing PERTs become registered part of eduPERT:

    • AMRES

    • BRNET

    • CESNET

    • FUNET

    • GARR

    • GRNET

    • LITNET

    • HUNGERNET

    • RENATER

    • SANET

  • eduPERT website restructured, extended with new materials (brochure) and linked to GN3 portal

  • Collaboration with existing and potential national and organisational PERTs established (e.g. Internet2, LHCOPN, DEISA, RedClara)


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TERENA NREN Compendium 2008 http://www.terena.org/activities/compendium/2008-> Network Connectivity and services

PERT team is present within following NRENs (but not registered in eduPERT):


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TERENA NREN Compendium 2008 http://www.terena.org/activities/compendium/2008-> Network Connectivity and services

PERT team is absent within following NRENs, but plan to deploy:


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PERT workshop

Agenda

  • Introduction to PERT and eduPERT for newcommers

  • Review of current status

  • Technical presentations and discussion from PERT teams

  • 15.30 Coffee break

  • Technical presentations and discussion part 2

  • 17.30 End


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PERT workshop

  • Technical presentations


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