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TOPS “Technology for Optical Pixel Streaming”

TOPS “Technology for Optical Pixel Streaming”. Paul Wielinga Division Manager High Performance Networking SARA Computing and Networking Services wielinga@sara.nl. Courtesy EVL. Outline. About SARA Rationale for adapting OptIPuter concept TOPS Demonstration US117b at iGrid2005

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TOPS “Technology for Optical Pixel Streaming”

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  1. TOPS“Technology for Optical Pixel Streaming” Paul Wielinga Division Manager High Performance Networking SARA Computing and Networking Services wielinga@sara.nl Courtesy EVL

  2. Outline • About SARA • Rationale for adapting OptIPuter concept • TOPS • Demonstration US117b at iGrid2005 • (Preliminary) Results • Other demo’s SARA is involved in iGrid2005 - GLVF OptIPuter panel

  3. SARA Computing and Networking Services • SARA: National e-Science Support Center • Home of • Dutch Supercomputing infrastructure • SURFnet NOC • SURFnet6 major core node • NetherLight (sister site of StarLight) • Amsterdam LightHouse • OptIPuter affiliate international partner • LHC Tier-1 site • Proposed LOFAR storage site • SARA is independent and not-for-profit iGrid2005 - GLVF OptIPuter panel

  4. Teraflops, Terabytes, Terabits, Terapixels @SARA STK tape library CAVE IBM Cluster 1600 Netherlight SGI Altix 3700 Linux Nationaal Rekencluster SGI Origin 3800 Tiled-panel display SURFnet 6 iGrid2005 - GLVF OptIPuter panel

  5. Why we adopt OptIPuter ~PBytes/sec LHC Tier-1 site (with NIKHEF) Brain Activity Analysis Univ Utrecht Life Sciences • Science pull: • Petabytes of complex data explored and analyzed by nationally and internationally dispersed scientists, in many teams • SARA’s mission as e-Science Support Center LOFAR iGrid2005 - GLVF OptIPuter panel

  6. Why we adopt OptIPuter (2) • Technology push: • SURFnet6 – Hybrid Optical and Packet Switching Network • 5 Photonic RIngs • Light Path Provisioning for all universities and research institutions in NL iGrid2005 - GLVF OptIPuter panel

  7. TOPSTechnology for Optical Pixel Streaming • Use OptIPuter concept to split visualization from display • Render images from very large data sets on central visualization cluster • Use high speed (lambda) networks to stream pixels to ultra-high resolution tiled panel displays • Adapt the idea of video streaming: constant stream of pixels from renderer to display • Use lossy protocols for long distance connectivity: High performance TCP hard to achieve, UDP performance trivial • Light weight application • Possibly incorporated in SAGE (EVL and UCSD)? iGrid2005 - GLVF OptIPuter panel

  8. DEMO US117b – GLVF TOPS • Very large 2D and 3D datasets located at SARA in Amsterdam • Render cluster (29 nodes) at SARA • 20 Gbps connectivity between cluster and NetherLight, via University of Amsterdam switch • 2 * 10 Gbps lambda between Amsterdam and San Diego (SURFnet, CaveWave, WANPHY Amsterdam-SD) • UCSD LambdaVision display at iGrid: 100 Megapixel Tiled Display • 1 Frame = 100 Mpixel*24 bits = 2.4 Gbits • Uncompressed and compressed mode • Streaming pixels from Amsterdam to San Diego iGrid2005 - GLVF OptIPuter panel

  9. Preliminary results • First demoslot, 1 10 Gbps available • Sustained bandwidth used between rendering and display 9.2 Gbps • Second demoslot, 2 * 10 Gbps • Sustained bandwidth 5,3 + 6,2 = 11,5 Gbps iGrid2005 - GLVF OptIPuter panel

  10. Final results • Third demoslot, 2 times 10 Gbps available • Sustained bandwidth used between rendering and display 18 Gbps • Peak bandwidth of 19.5 Gbps! • New world record of transatlantic bandwidth usage by one single application visualizing scientific content iGrid2005 - GLVF OptIPuter panel

  11. Preliminary results • Limitation was MTU size – not whole path was jumbo-frame enabled • Display cluster had 100% cpu load due to small MTU size • Large UDP packet loss (upto 50%) • Noticable difference in latency (visible) between CaveWave (with 4 switches) and direct WANPHY connection • Later today: • new trial with jumbo frames enabled • Expect higher framerate and bandwidth usage of 15 Gbps or more iGrid2005 - GLVF OptIPuter panel

  12. iGrid2005 demonstrations • US117b: GLVF – Unreliable Stream of Images (TOPS) • SARA participation in other demo’s: • US117a: SAGE (EVL) computing support in Amsterdam • NL102: Dead Cat (UvA) – Visualization support (Amsterdam) • US106: 10 Gb line-speed security (NORTEL) – Networking and computing support (Amsterdam) iGrid2005 - GLVF OptIPuter panel

  13. Credits • Bram Stolk (SARA) • Jeroen Akershoek (SARA) • Ronald van der Pol (SARA) • Pieter de Boer (SARA) • Hanno Pet (SARA) • University of Amsterdam (Paola Grosso et al.) • SURFnet (Dennis Paus et al.) • Jason Leigh, Luc Renambot, Lance Long and colleagues at EVL and UCSD • iGrid2005 networking and LambdaVision crews iGrid2005 - GLVF OptIPuter panel

  14. Thank You

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