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FDLoRA: Personalized Federated Learning of Large Language Model via Dual LoRA Tuning

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arxiv 2406.07925 v2 pith:TQHSCB3J submitted 2024-06-12 cs.DC

classification cs.DC
keywords fdloradataloraclientdualfederatedlearningperformance
verification ladder T0 review T1 audit T2 compute T3 formal
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Large language models (LLMs) have emerged as important components across various fields, yet their training requires substantial computation resources and abundant labeled data. It poses a challenge to robustly training LLMs for individual users (clients). To tackle this challenge, the intuitive idea is to introduce federated learning (FL), which can collaboratively train models on distributed private data. However, existing methods suffer from the challenges of data heterogeneity, system heterogeneity, and model size, resulting in suboptimal performance and high costs. In this work, we proposed a variant of personalized federated learning (PFL) framework, namely FDLoRA, which allows the client to be a single device or a cluster and adopts low-rank adaptation (LoRA) tuning. FDLoRA sets dual LoRA modules on each client to capture personalized and global knowledge, respectively, and only the global LoRA module uploads parameters to the central server to aggregate cross-client knowledge. Finally, an adaptive fusion approach is employed to combine the parameters of the dual LoRAs. This enables FDLoRA to make effective use of private data distributed across different clients, thereby improving performance on the client without incurring high communication and computing costs. We conducted extensive experiments in two practice scenarios. The results demonstrate that FDLoRA outperforms six baselines in terms of performance, stability, robustness, computation cost, and communication cost.

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Forward citations

Cited by 6 Pith papers

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

  1. Safe-FedLLM: Delving into the Safety of Federated Large Language Models

    cs.CR 2026-01 unverdicted novelty 6.0 of 10

    Safe-FedLLM shows that a lightweight logistic-regression probe on LoRA B-matrix deltas can detect malicious federated clients, and step/client/shadow defense levels restore most of the safety lost to data poisoning.

  2. Interpretable Mnemonic Generation for Kanji Learning via Expectation-Maximization

    cs.CL 2025-07 conditional novelty 6.0 of 10

    An EM-type algorithm jointly learns interpretable mnemonic rules and learner/kanji traits, yielding modest cold-start gains over fine-tuning for kanji mnemonic generation.

  3. FedRPCA: Enhancing Federated LoRA Aggregation Using Robust PCA

    cs.LG 2025-06 conditional novelty 6.0 of 10

    FedRPCA decomposes federated LoRA client updates with Robust PCA into common and client-specific components, averaging the common part and scaled-averaging the sparse part, which improves accuracy and convergence over...

  4. FedHL: Federated Learning for Heterogeneous Low-Rank Adaptation via Unbiased Aggregation

    cs.LG 2025-05 reject novelty 6.0 of 10

    FedHL aggregates heterogeneous LoRA updates against a full-rank global baseline and claims O(1/sqrt T) convergence, with small gains on three LLM fine-tuning datasets.

  5. Dysco: Dynamic Subspace Boosting to Mitigate LoRA Interference in Federated Learning

    cs.LG 2026-07 conditional novelty 5.0 of 10

    Dysco reduces cross-client interference in federated LoRA fine-tuning by fixing each client's update subspace to directions insensitive to other clients' activations, yielding tighter bounds and better benchmark accuracy.

  6. LLM-QFL: Distilling Large Language Model for Quantum Federated Learning

    cs.LG 2025-05 reject novelty 4.0 of 10

    LLM-QFL uses locally fine-tuned LLMs as controllers to reduce communication rounds and adapt optimizer steps in quantum federated learning.

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