Weighted bandwidth allocation is a powerful abstraction that has a wide range of use cases in modern data center networks. However, realizing highly agile and precise weighted bandwidth allocation for large-scale cloud environments is fundamentally challenging. In this paper, we propose S\"{o}ze, a lightweight decentralized weighted bandwidth allocation system that leverages simple network telemetry features of commodity Ethernet switches. Given the flow weights, S\"{o}ze can effectively use the telemetry information to compute and enforce the weighted bandwidth allocations without per-flow, topology, or routing knowledge. We demonstrate the effectiveness of S\"{o}ze through simulations and testbed experiments, improving TPC-H jobs completion time by up to 0.59× and 0.79× on average.
@article{arxiv.2506.00834,
title = {S\"{o}ze: One Network Telemetry Is All You Need for Per-flow Weighted Bandwidth Allocation at Scale},
author = {Weitao Wang and T. S. Eugene Ng},
journal= {arXiv preprint arXiv:2506.00834},
year = {2025}
}