Optical Interconnects. Outline. Interconnection Networks Terminology, basics, examples Optical Interconnects Motivation Architecture examples for Data Centers and HPC Building blocks Sum-up - issues. Interconnection Networks: What is an interconnection network?.
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6-ring arranged to use short wires
Fat Trees: Fatter links (really more of them) as you go up
Super LU HPC application
FFT HPC application
Collinear layout for a hypercube
2-D layout for a hypercube
A single Node
In the front-end: route the request to the appropriate server.
Top Of Rack switch
1 Gbps links
Servers (up to 48) as blades
No new wavelengths needed for intercluster network
performance of RAPID: worse than electr networks
Traffic patterns, RWA: huge impact on performance
VCSELs (vertical-cavity surface-emitting laser)
Example: 2D torus at board level (16 nodes per board)
Example (cont): 3D torus at backplane level (256 nodes=16 boards of 16 nodes)
AOC (Active Optical Cable)
for board to Storage
AOC for board-to-board interconnection
Architecture and topology studies:
256 node 3D Torus