1. CAPTON—Centralized All-Path Transmission for Over-Subscribed Datacenter Networks
- Author
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Nan Zhou and Jack Y. B. Lee
- Subjects
Datacenter ,networking ,scheduling ,congestion ,over-subscription ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
This work addresses an often-overlooked challenge in designing datacenter traffic control schemes. Specifically, most existing schemes were designed for network topologies with non-blocking network core. While this enabled the development of elegant solutions, core networks in practice are more likely to be over-subscribed by the access layer network due to cost considerations. Consequently, existing traffic control schemes may perform sub-optimally in real-world over-subscribed datacenter networks. This work proposes a new centralized flow-based scheduling scheme called CAPTON which schedules flow according to remaining flow size and link capacities to avoid congestion in over-subscribed networks. CAPTON employs all-path transmission to exploit all available paths and redundant links between source and destination hosts to maximize resource utilization and eliminate the need for routing. Unlike switch-based approaches, CAPTON does not require additional support from network switches and thus can be readily deployed in current datacenters equipped with commodity switches.
- Published
- 2022
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