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International Journal of Big Data Intelligent Technology, 2026, 7(2); doi: 10.38007/IJBDIT.2026.070206.

High Performance Load Balancing Method for Distributed Inference of Large-Scale Language Models

Author(s)

Yiling Yuan

Corresponding Author:
Yiling Yuan
Affiliation(s)

Information Networking Institute, Carnegie Mellon University, Pittsburgh, 15213, Pennsylvania, United States

Abstract

Large-scale language model inference services are rapidly developing in online question-answering, intelligent agents and enterprise knowledge retrieval. Inference requests have many differences in the size of the input and output, when they are sent, and how much performance is expected. The above three strategies (traditional round-robin, least-connection, and single-instance batch processing) cannot achieve both high throughput and low tail latency simultaneously. Therefore, a prediction-aware load-balancing method for mixed long- and short-request loads has been developed, and in order to achieve this, request cost prediction, instance pressure normalisation, stage-aware routing, batch adaptive adjustment and service-level-effective throughput evaluation have been integrated into a unified framework. Based on real-world data from publicly available English literature over the past three years, two statistical charts and three comparison tables are generated to summarize the size of throughput, service capacity, tail latency and resource savings in different systems. Based on the above analysis, load balancing should not only consider the number of requests but also determine dynamically how much these requests will be coupled at the pre-filling, decoding, and key-value cache usage stages. The new way is convenient for individuals to learn and scalable enough for a big-scale inference node.

Keywords

Large language model; Distributed inference; Load balancing; Request scheduling; Service level target; Key-value caching

Cite This Paper

Yiling Yuan. High Performance Load Balancing Method for Distributed Inference of Large-Scale Language Models. International Journal of Big Data Intelligent Technology (2026), Vol. 7, Issue 2: 51-60. https://doi.org/10.38007/IJBDIT.2026.070206.

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