UKLIGHT: projects at UCL Saleem Bhatti - - PowerPoint PPT Presentation

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UKLIGHT: projects at UCL Saleem Bhatti - - PowerPoint PPT Presentation

Dec 08, 2023 325 likes •493 views

UKLIGHT: projects at UCL Saleem Bhatti http://www.cs.ucl.ac.uk/staff/S.Bhatti/ 1 Challenges High-speed (multi-Gb/s) operation: network engineering for high-speed QoS at high speed within the core network QoS for individual

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UKLIGHT: projects at UCL

Saleem Bhatti

http://www.cs.ucl.ac.uk/staff/S.Bhatti/

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Challenges

  • High-speed (multi-Gb/s) operation:
  • network engineering for high-speed
  • QoS at high speed within the core network
  • QoS for individual application flows:
  • state management and site-to-site signalling
  • Operation of protocols:
  • for example TCP congestion control proposals
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Background work

MB-NG http://www.mb-ng.net/ Managed Bandwidth Next Generation ~£900K, Co-I GRS http://www.cs.ucl.ac.uk/research/nrs/ Grid Resource Scheduling ~£138K, PI

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GRS and MB-NG

  • GRS:
  • site-to-site per-flow QoS reservations
  • decentralised
  • application-level APIs
  • (use MB-NG network as test-bed)
  • MB-NG:
  • SuperJANET4 dev net
  • DIFFSERV across core
  • high-speed TCP experiments
  • (dynamic QoS-control using GRS)
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5 from http://www.ja.net/

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Experiments: SuperJANET4

RAL ULCC Warrington UCL Manchester core router - Cisco 12xxx edge router - Cisco 7609 2.5Gb/s POS

SuperJANET4 Development Network (from the MB-NG project)

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Activities

  • QoS performance analysis:
  • DIFFSERV EF
  • QoS control software (NRS):
  • released in May 2004 (open source)

http://www.cs.ucl.ac.uk/research/nrs/

  • dynamic, on-demand, site-to-site QoS control
  • modular system - other sub-net technologies
  • (dynamic QoS control recorded demo on web site)
  • TCP performance analysis:
  • multiple TCP implementations
  • exploration of practical usage
  • end-system limitations
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The future - questions raised

  • What happens with a more heterogenous traffic mix?
  • How does the system scale?
  • number of flows?
  • amount of traffic?
  • size of network?
  • heterogeneity of traffic?
  • What is a sensible profile of mechanisms to use?
  • congestion control? (HS-TCP? Scalable-TCP? ECN? XCP? etc.)
  • queue management?
  • QoS control?
  • Is TCP (+ mods) actually useful for Gb/s?
  • some other, new transport protocol perhaps? e.g. DCCP?
  • How should the application get involved?
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UKLIGHT http://www.uklight.ac.uk/ ~£6.5M, Editor of the Scientific Case, member of the UKLIGHT TAG many contributors - http://www.cs.ucl.ac.uk/staff/S.Bhatti/uklight-proposal/

UKLIGHT

  • The need for a high-speed network facility

for research:

  • transmission/photonics and switching
  • networking
  • applications
  • Link to other existing facilities world-wide:
  • Global Lambda Infrastructure Facility (GLIF)
  • http://www.glif.is/
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UKLIGHT - GLIF

from http://www.glif.is/

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Current work - just starting

46PaQ http://www.cs.ucl.ac.uk/research/46paq/ ~£650K, PI: IPv4 & IPv6 Performance and QoS MASTS http://www.ee.ucl.ac.uk/~lsacks/acse/masts/ ~£1.2M, Co-I: Measurements at All Scales in Time and Space ESLEA Exploiting Switched Lightpaths for E-science Applications ~£1.1M, Co-I MRC

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StarLight (Chicago) NetherLight (Amsterdam)

Project links

GRS (edge) MB-NG (core, UK) UKLIGHT

(international)

MASTS 46PaQ

GRS - http://www.cs.ucl.ac.uk/research/nrs/ MB-NG - http://www.mb-ng.net/ UKLIGHT - http://www.uklight.ac.uk/ 46PaQ - http://www.cs.ucl.ac.uk/research/46paq/ MASTS - http://www.ee.ucl.ac.uk/~lsacks/acse/masts/ ESLEA - URL TBA

ESLEA

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“Plan A” : a work-in-progress

Real-time Monitoring

Compression (Model Free & Model Dependant)

MASTS Analysis at All Scales in Time & Space

Front End Enhancements: Advanced Protocols

Data Analysis and Traffic Modelling 46PaQ Protocol Innovation Behaviour And Performance For QoS and Control

Technology Innovation Network Science Applications

Towards Next Generation Networks

ESLEA Applications and the Network Data Acquisition, Storage & Archiving

SuperJANET and UKLIGHT

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Potential output

  • High-speed experiments & performance analysis:
  • methods, metrics, tools
  • Better (performing) implementations:
  • end-systems design and engineering
  • Feedback to applications:
  • performance-based adaptation for applications
  • Traffic models:
  • network management, planning and design
  • Network engineering insights
  • Services to the community:
  • researchers, operational and applications users
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Other questions forming …

  • How do we design and engineer high-speed

protocols and networked systems that:

  • make efficient use of QoS and congestion control?
  • have appropriate instrumentation in the network?
  • can provide feedback to applications?
  • How can applications react in a timely manner to

feedback from the network?

  • change the design of applications?
  • new transport protocols and/or systems APIs?
  • instrumentation and engineering of the end-systems?
  • Watch this space …. 
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General areas of work

  • Practical work in three broad areas:

1. networking in the large 2. scalability and evolution of networked systems 3. high-performance networked systems 4. highly-integrated networked systems

  • Some common key threads:
  • control, management and evolution of networked systems
  • interactions: end-system, network, application and user
  • real experiments on real networks
  • HEN - Heterogeneous Experimental Network:
  • “lights-out”, L2/L3-configurable network lab
  • work-in-progress