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AIBrix: Towards Scalable, Cost-Effective Large Language Model Inference Infrastructure

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arxiv 2504.03648 v1 pith:ONG4BZ3G submitted 2025-02-22 cs.DC cs.AI

AIBrix: Towards Scalable, Cost-Effective Large Language Model Inference Infrastructure

classification cs.DC cs.AI
keywords aibrixinferenceefficiencycloud-nativeimproveinfrastructurelarge-scalemaintaining
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We introduce AIBrix, a cloud-native, open-source framework designed to optimize and simplify large-scale LLM deployment in cloud environments. Unlike traditional cloud-native stacks, AIBrix follows a co-design philosophy, ensuring every layer of the infrastructure is purpose-built for seamless integration with inference engines like vLLM. AIBrix introduces several key innovations to reduce inference costs and enhance performance including high-density LoRA management for dynamic adapter scheduling, LLM-specific autoscalers, and prefix-aware, load-aware routing. To further improve efficiency, AIBrix incorporates a distributed KV cache, boosting token reuse across nodes, leading to a 50% increase in throughput and a 70% reduction in inference latency. AIBrix also supports unified AI runtime which streamlines model management while maintaining vendor-agnostic engine compatibility. For large-scale multi-node inference, AIBrix employs hybrid orchestration -- leveraging Kubernetes for coarse-grained scheduling and Ray for fine-grained execution -- to balance efficiency and flexibility. Additionally, an SLO-driven GPU optimizer dynamically adjusts resource allocations, optimizing heterogeneous serving to maximize cost efficiency while maintaining service guarantees. Finally, AIBrix enhances system reliability with AI accelerator diagnostic tools, enabling automated failure detection and mock-up testing to improve fault resilience. AIBrix is available at https://github.com/vllm-project/aibrix.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. CTA-Pipelining: A Latency-Oriented Spatial Scaling Method for Multi-GPU Systems

    cs.DC 2026-07 conditional novelty 6.0

    CTA-pipelining reduces 2-layer GEMM latency up to 31.8% vs micro-batching and 29.6% vs Tensor Parallelism on 8-GPU H200/B200 systems by CTA-level cross-GPU pipelining.

  2. Maestro: Workload-Aware Cross-Cluster Scheduling for LLM-Based Multi-Agent Systems

    cs.DC 2026-06 unverdicted novelty 6.0

    Maestro is a workload-aware scheduler for LLM-based multi-agent systems that cuts KV-reservation HBM by 67.2% and raises high-contention SLO attainment by 23.6 points over EDF via prediction-driven hierarchical scheduling.

  3. Scepsy: Serving Agentic Workflows Using Aggregate LLM Pipelines

    cs.DC 2026-04 unverdicted novelty 6.0

    Scepsy schedules arbitrary multi-LLM agentic workflows on GPU clusters by constructing Aggregate LLM Pipelines from stable per-LLM execution time shares, then searching fractional GPU allocations, tensor parallelism, ...

  4. CascadeInfer: Length-Aware Scheduling of LLM Serving with Low Latency and Load Balancing

    cs.DC 2025-12 conditional novelty 6.0

    CascadeInfer partitions LLM instances into length-specialized groups, uses dynamic programming for stage partitioning, and applies runtime refinement plus decentralized load balancing to cut latency and raise throughput.

  5. RcLLM: Accelerating Generative Recommendation via Beyond-Prefix KV Caching

    cs.DC 2026-05 unverdicted novelty 5.0

    RcLLM accelerates generative recommendation inference by 1.31x-9.51x in TTFT through beyond-prefix KV caching, replicated user caches, sharded item caches, affinity scheduling, and selective attention with negligible ...

  6. Toward Robust and Efficient ML-Based GPU Caching for Modern Inference

    cs.LG 2025-09 unverdicted novelty 5.0

    Learning-augmented LRU achieves 1-consistency and O(k)-robustness for GPU caching with low overhead, implemented in LCR to cut P99 TTFT by up to 28.3% on LLM workloads and raise throughput by up to 24.2% on DLRM workloads.

  7. GoodServe: Towards High-Goodput Serving of Agentic LLM Inferences over Heterogeneous Resources

    cs.DC 2026-05 unverdicted novelty 4.0

    GoodServe proposes a predict-and-rectify routing system for agentic LLM inferences on heterogeneous GPUs that improves goodput by up to 27.4%.