Tommaso Bonato, Sepehr Abdous, Abdul Kabbani, Ahmad Ghalayini, Nadeen Gebara, Terry Lam, Anup Agarwal, Tiancheng Chen, Zhuolong Yu, Konstantin Taranov, Mahmoud Elhaddad, Daniele De Sensi, Soudeh Ghorbani, Torsten Hoefler:
Uno: A One-Stop Solution for Inter- and Intra-Datacenter Congestion Control and Reliable Connectivity
(In Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis (SC'25), presented in St. Louis, MO, USA, Nov. 2025)
Abstract
Cloud computing and AI workloads are driving unprecedented demand for efficient communication within and across datacenters. However, the coexistence of intra- and inter-datacenter traffic within datacenters plus the disparity between the RTTs of intra- and inter-datacenter networks complicates congestion management and traffic routing. Particularly, faster congestion responses of intra-datacenter traffic causes rate unfairness when competing with slower inter-datacenter flows. Additionally, inter-datacenter messages suffer from slow loss recovery and, thus, require reliability. Existing solutions overlook these challenges and handle inter- and intra-datacenter congestion with separate control loops or at different granularities. We propose Uno, a unified system for both inter- and intra-DC environments that integrates a transport protocol for rapid congestion reaction and fair rate control with a load balancing scheme that combines erasure coding and adaptive routing. Our findings show that Uno significantly improves the completion times of both inter- and intra-DC flows compared to state-of-the-art methods such as Gemini.
Documents
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Recorded talk (best effort)
BibTeX
@inproceedings{bonato2025uno, author={Tommaso Bonato and Sepehr Abdous and Abdul Kabbani and Ahmad Ghalayini and Nadeen Gebara and Terry Lam and Anup Agarwal and Tiancheng Chen and Zhuolong Yu and Konstantin Taranov and Mahmoud Elhaddad and Daniele De Sensi and Soudeh Ghorbani and Torsten Hoefler}, title={{Uno: A One-Stop Solution for Inter- and Intra-Datacenter Congestion Control and Reliable Connectivity}}, year={2025}, month={Nov.}, booktitle={Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis (SC'25)}, location={St. Louis, MO, USA}, source={http://www.unixer.de/~htor/publications/}, }
