connect communicate collaborate pert workshop bartek gajda [email protected] poznan supercomputing...

connect • communicate • collaborate

PERT workshop

Bartek [email protected]

Poznan Supercomputing and Networking Center (PSNC)PIONIER (Polish NREN)

TERENA NETWORKING CONFERENCE 2010

30 May 2010


2

PERT workshop

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

Agenda


3

PERT workshop


Review of current status


15.30 Coffee break


17.30 End

Agenda


4

What is PERT ?

PERT – The Performance Enhancement and Response Team

• a virtual organization

• made of networking experts

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


5

What is PERT ? (2)

• End-user will contact the PERT either directly or through their standard IT support channels when their applications are not working normally

PERT

IT NOC

PERT


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What is PERT ? (3)

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

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

• One of the main functions of the PERT is to ask intelligent questions of those 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 PERT 2002-2004

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 PERT 2002-2004

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




15.30 Coffee break


17.30 End

Agenda


15

The GEANT PERT 2009 - now

List of participating PERTsARNES (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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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 login for registered participants )

eduPERT website structure- edupert.geant.net


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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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eduPERT within 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 community

Milestones MS2.3.7 and 2.3.8:

Specification of the Backbone and Campus PERT

Support Monitoring Infrastructure


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eduPERT Cases - statistics

Apr-09

May-09

Jun-09

Jul-09

Aug-09

Sep-09

Oct-09

Nov-09

Dec-09

Jan-10

Feb-10

Mar-10

New 2 5 2 1 4 7 8 8 0 7 7 4

Open 6 14 13 6 14 15 15 16 14 9 14 8

Closed 2 3 3 0 3 6 7 7 2 6 8 2

Total(open+closed)

8 17 16 16 17 21 22 23 16 15 22 10


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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

AMRES Serbia Akademska mreža Srbije

BASNET Belarus Byelorussian Academy of Sciences Network

BREN Bulgaria Bulgarian Research and Education Network

CERIST Algeria Algerian Research Network

CESNET Czech Republic

Funet Finland

GARR Italy

GRENA Georgia Georgian Research and Educational Networking Association

GRNET S.A. Greece

LITNET Lithuania Academic and Research Network in Lithuania

NIIF/HUNGARNET Hungary Hungarian Research and Education Network

RBNet/RUNNet Russia Russian Backbone Network

RENATER France National Telecommunication network for Technology Education and Research

SANET Slovakia Slovak Academic Network

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:AARNet Australia Australia's Academic and Research Network Within 3 years

ACOnet Austria Austrian Academic Computer Network Within 3 years

BELNET Belgium Within 3 years

CARNet Croatia Within 1 year

CYNET Cyprus Within 3 years

DFN Germany Deutsche Forschungsnetz Within 1 year

IUCC Israel Inter University Computation Center Within 3 years

MARNet Within 1 year

MARWAN Morocco Within 1 year

MREN Montenegro Within 3 years

NI-C Denmark Within 1 year

NREN Nepal Nepal Research and Education Network Within 1 year

RedIRIS Spain RedIRIS Network Management Centre Within 1 year

RENAM Moldova Research and Educational Network of Moldova Within 3 years

RHnet Iceland The Icelandic University Research Network Within 3 years

RoEduNet Romania Romanian National Research and Education Network Within 1 year

ULAKBIM Turkey Within 3 years

UNI-C Denmark Within 1 year

UNINETT Norway Within 3 years

UoM/RicerkaNet Malta Within 3 years


24

PERT workshop




15.30 Coffee break


17.30 End

Agenda


25

PERT workshop

Technical presentations