DINC: Toward Distributed In-Network Computing / Exploring the Benefits of Carbon-Aware Routing

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• changgang.zheng@eng.ox.ac.uk, sawsan.elzahr@eng.ox.ac.uk
• Thursday 23 November 2023, 15:00-16:00
• FW11.

If you have a question about this talk, please contact Ryan Gibb.

Title: DINC : Toward Distributed In-Network Computing Speaker: Changgang Zheng Abstract: In-network computing provides significant performance benefits, load reduction, and power savings. Still, an in-network service’s functionality is strictly limited to a single hardware device. Research has focused on enabling on-device functionality, with limited consideration to distributed in-network computing. This presentation explores the applicability of distributed computing to in-network computing. We present DINC , a framework enabling distributed in-network computing, generating deployment strategies, overcoming resource constraints and providing functionality guarantees across a network. It uses multi-objective optimization to provide a deployment strategy, slicing P4 programs accordingly. DINC was evaluated using seven different workloads on both data center and wide-area network topologies, demonstrating feasibility and scalability, providing efficient distribution plans within seconds.

Title: Exploring the Benefits of Carbon-Aware Routing Speaker: Sawsan El Zahr Abstract: Carbon emissions associated with fixed networks can be significant. However, accounting for these emissions is hard, requires changes to deployed equipment, and has contentious benefits. This work sheds light on the benefits of carbon aware networks, by exploring a set of potential carbon-related metrics and their use to define link-cost in carbon-aware link-state routing algorithms. Using realistic network topologies, traffic patterns and grid carbon intensity, we identify useful metrics and limitations to carbon emissions reduction. Consequently, a new heuristic carbon-aware traffic engineering algorithm, CATE , is proposed. CATE takes advantage of carbon intensity and routers’ dynamic power consumption, combined with ports power down, to minimize carbon emissions. Our results show that there is no silver bullet to significant carbon reductions, yet there are promising directions without changes to existing routers’ hardware.

This talk is part of the Computer Laboratory Systems Research Group Seminar series.

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