Söze - One Network Telemetry Is All You Need for Per-flow Weighted Bandwidth Allocation at Scale

Learn about Söze, a lightweight decentralized weighted bandwidth allocation system designed for large-scale cloud environments in this 16-minute conference talk from OSDI '25. Discover how this innovative approach leverages simple network telemetry features of commodity Ethernet switches to achieve highly agile and precise weighted bandwidth allocation without requiring per-flow, topology, or routing knowledge. Explore the fundamental challenges of implementing weighted bandwidth allocation in modern data center networks and understand how Söze's decentralized architecture addresses these issues through effective use of telemetry information to compute and enforce weighted bandwidth allocations. Examine the system's performance improvements demonstrated through simulations and testbed experiments, including TPC-H job completion time improvements of up to 0.59× and 0.79× on average, showcasing the practical benefits of this approach for cloud infrastructure optimization.