BloomBee: An Optimization Framework for Internet-Scale Distributed LLM Inference

This article introduces BloomBee—an optimization framework for internet-scale distributed large language model (LLM) inference. Its core goal is to address cross-node bandwidth bottlenecks. By using multi-dimensional communication optimization techniques, it achieves up to 1.76x throughput improvement and 43.20% latency reduction. The framework performs collaborative optimization across multiple dimensions including layer allocation, micro-batching, tensor offloading, compression, and speculative decoding, making it suitable for low-bandwidth environments such as wide area networks (WANs).

As LLM scales expand, single-machine inference can no longer meet production needs, making distributed inference inevitable. However, in the heterogeneous node environment of the internet, cross-node network bandwidth becomes the primary bottleneck. High-speed interconnections in traditional data centers (such as NVLink and InfiniBand) cannot be replicated in wide area networks, and communication latency and bandwidth limitations between nodes severely restrict inference efficiency.

BloomBee adopts a dynamic LLM layer allocation strategy, which intelligently maps Transformer layers based on network topology and node computing capabilities. Meanwhile, micro-batching technology splits large requests into small batches, optimizes pipeline filling, reduces bubble time, and balances throughput with individual request waiting time.

Tensor offloading allows transferring some intermediate results to memory or storage, balancing computation and communication loads. BloomBee converts the coordination of layer allocation, micro-batching, and tensor offloading into an optimization problem, solving for the optimal configuration via dynamic programming to achieve global adaptive adjustment and avoid the limitations of manual parameter tuning.

For low-bandwidth networks, BloomBee customizes lossless compression algorithms to reduce cross-node data transmission volume. It introduces speculative decoding technology, which pre-computes by predicting future tokens to mask communication latency, reducing the impact of communication on latency without sacrificing accuracy.

Evaluations of BloomBee in various network environments show that compared to state-of-the-art systems, it achieves up to 1.76x throughput improvement and an average latency reduction of 43.20%. Improvements are particularly significant in low-bandwidth scenarios, verifying the effectiveness of the multi-dimensional optimization strategy. The framework has been open-sourced, providing a benchmark and foundation for community improvements.

BloomBee provides new ideas for LLM deployment in scenarios such as edge computing and federated learning, proving that the combination of algorithm optimization and system design can achieve efficient distributed inference without dedicated high-speed networks. In the future, as model scales grow and edge computing power improves, cross-domain optimization frameworks will become more important, helping to democratize AI.