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Performance monitoring and optimization

The project investigates theoretical and practical aspects of end-to-end performance in high-speed long-distance networks. We particularly concentrate on performance monitoring and study of protocol behaviour.

Monitoring

Access to measurements results from the deployed monitoring tools is available. Requires CESNET CAAS username and password.

Project resources

Public TWiki pages (in Czech)

Internal TWiki pages (requires CESNET CAAS username and password)

CVS repository (requires CESNET CAAS username and password)

Work in progress

• Traffic dynamics monitoring
• Automatic support of hardware monitoring adapters in MAPI environment for passive monitoring applications
• Computing of network-geographic statistics
• Assisted TCP performance analysis

Publications

Papers, conferences and workshops

• Sven Ubik., Petr Žejdl, Jiří Halák
  Real-Time Anonymization in Passive Network Monitoring
  ICNS2007 - The Third International Conference on Networking and Services, June 19-25, 2007, Athens.
  pdf
• Sven Ubik, Václav Řehák, Lukáš Baxa
  Ladění propustnosti TCP přenosů aplikací Tbwtools
  Širokopásmové sítě a jejich aplikace, 29-30 May, 2007, Olomouc.
  pdf (in Czech)
• Sven Ubik, Arne Oslebo, Demetres Antoniades
  Pasivní monitorování zátěže linky
  Širokopásmové sítě a jejich aplikace, 29-30 May, 2007, Olomouc.
  pdf (in Czech)
• Petr Žejdl, Jiří Halák
  FPGA-based Acceleration of Packet Header Anonymization
  Poster - 11th Student Int. Conf. on Electrical Eng., ČVUT v Praze, Fakulta elektrotechnická, May 17, 2007, Prague.
  pdf
• Sven Ubik, Arne Oslebo, Demetres Antoniades
  ABW - Short-timescale passive bandwidth monitoring
  ICN2007 - The Sixth International Conference on Networking, April 22-28, 2007, Sainte-Luce.
  pdf

Technical reports

• Sven Ubik, Arne Oslebo, Demetres Antoniades
  ABW - Short-timescale passive bandwidth monitoring
  CESNET Technical Report 3/2007
  html pdf

Internal project reports

No internal project reports are currently available.

Older publications

2003 - 2005
2000 - 2002

Related projects

We take part in the following research projects and activities:

• LOBSTER
• GN2 JRA1 (see perfSONAR and JRA1 Wiki pages)

We took part in the following past research projects:

• SCAMPI
• TF-NGN task force

  PERT

  We take part in PERT (Performance Response and Enhancement Team), which is part of SA3 activity of the GN2 project.

  If you encounter a network performance problem, try to find an answer in the PERT knowledge base. If your problem occurs when using CESNET network, please report the problem to our helpdesk. If the problem cannot be resolved quickly, a new PERT case will opened. Registered users can then observe the case development in the PTS (PERT ticket system) and in PTS diary.

  Developed software

  CVS repository

  Development versions of our software are available in CVS repository (requires CESNET CAAS username and password).

  Psock library

  Parallel implementation of sockets library to introduce parallel transfers into user applications. Different algorithms of distributing data into parallel streams can be used. psock-0.2a.tgz

  Bulk + AIMD patch

  Bulk tool allows achievable throughput measurement (iperf-like) combined with real-time monitoring of TCP run-time variables to debug performance problems.

  AIMD patch allows to configure TCP congestion avoidance AIMD parameters (slope of additive increase and drop of multiplicative decrease) on per-socket basis.

  Presentation: Tools for TCP performance debugging

  Technical report: "Bulk" utility for TCP performance debugging Postscript PDF

  Download bulk-1.9.tgz

  Parallel scp

  Scp implementation that uses several parallel connections for faster file transfer. pscp

  GeoFlow

  Computes statistical flow characteristics in dependance on RTT and geographical distance. flow-1.0.zip geo-1.0.zip.

  NIST Net deterministic patch

  Provides deterministic packet loss and queue length for popular emulation package NIST Net. Read README.Deterministic and then apply nistnet-2.0.12-deterministic.patch to NIST Net sources.

  QoSplot

  A tool for computing and plotting QoS characteristics.

  Latest version is qosplot-0.46.tgz.

  qosplot README.

  NTP synchronization and one-way delay measurements

  • Vladimír Smotlacha. Accuracy of the Network Time Synchronization
  • Vladimír Smotlacha. The measurement of time synchronization accuracy
  • Vladimír Smotlacha. One-way delay measurement using NTP synchronization

  Archive documents

  Experiments

  Presentations on CESNET seminars (in Czech)

  Team

  Sven Ubik - activity leader

  Aleš Friedl
  Jiří Halák
  Stanislav Hotmar
  Vladimír Macek
  Vladimír Smotlacha
  Petr Žejdl

  Former team members:

  Pavel Cimbál, Martin Čížek, Antonín Král, Michal Kraus, Jan Klaban, Ladislav Ličko, Robert Nedbal, Ivan Šimeček.

  Contact

  Sven Ubik

  Last updated  by Sven Ubik