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About this paper
Konstantinos Prasopoulos, Ryan Kosta, Edouard Bugnion, Marios Kogias
SIRD, a datacenter transport protocol developed by researchers at EPFL, UCSD, and Imperial College London, combines receiver-driven proactive scheduling for exclusive links with sender-informed, reactive control for shared links. It achieved 12 times less peak network queuing than Homa while maintaining competitive latency and goodput across various datacenter workloads, and demonstrated 100Gbps performance in a software implementation.
Key insights
- A hybrid model effectively resolves the tension in receiver-driven protocols by enabling precise local control at exclusive links while coordinating resource allocation across shared links through reactive feedback.
- Dynamically adjusting credit based on real-time congestion at both sender uplinks and network core links allows for efficient network utilization with minimal in-network queuing.
- The end-to-end design, making decisions solely at end hosts, eliminates the need for specialized switch hardware or complex configurations, enhancing deployability in existing datacenter networks.
Summary by alphaXiv.
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