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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

PERT workshop

TERENA NETWORKING CONFERENCE 2010

30 May 2010

Bartek [email protected]

Poznan Supercomputing and Networking Center (PSNC)

PIONIER (Polish NREN)

pert workshop2
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
pert workshop3
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
what is pert
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.
what is pert 2
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

what is pert 3
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.
network performance problems
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
network performance problems8
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
origins of the pert
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
the geant pert 2002 2004
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
the geant pert 2002 200411
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
what is edupert
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
the benefits of joining edupert
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
pert workshop14
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
the geant pert 200 9 now
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

slide17

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 )
edupert knowledge base
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)
edu pert within gn3 latest update
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
edupert plans for the future
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)
slide22
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):

slide23
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:

pert workshop24
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
pert workshop25
PERT workshop
  • Technical presentations
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