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Cost-Effective Federated Learning Design - 2021

Cost-Effective Federated Learning Design

Research Area:  Machine Learning

Abstract:

Federated learning (FL) is a distributed learning paradigm that enables a large number of devices to collaboratively learn a model without sharing their raw data. Despite its practical efficiency and effectiveness, the iterative on-device learning process incurs a considerable cost in terms of learning time and energy consumption, which depends crucially on the number of selected clients and the number of local iterations in each training round. In this paper, we analyze how to design adaptive FL that optimally chooses these essential control variables to minimize the total cost while ensuring convergence. Theoretically, we analytically establish the relationship between the total cost and the control variables with the convergence upper bound. To efficiently solve the cost minimization problem, we develop a low-cost sampling-based algorithm to learn the convergence related unknown parameters. We derive important solution properties that effectively identify the design principles for different metric preferences. Practically, we evaluate our theoretical results both in a simulated environment and on a hardware prototype. Experimental evidence verifies our derived properties and demonstrates that our proposed solution achieves near-optimal performance for various datasets, different machine learning models, and heterogeneous system settings.

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Author(s) Name:  Bing Luo, Xiang Li, Shiqiang Wang, Jianwei Huang, Leandros Tassiulas

Journal name:  Computer Science

Conferrence name:  

Publisher name:  arXiv:2012.08336

DOI:  10.48550/arXiv.2012.08336

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