How Much Does It Cost to Train a Machine Learning Model over Distributed Data Sources?

• URL: http://arxiv.org/abs/2209.07124v1
• Date: Thu, 15 Sep 2022 08:13:40 GMT
• Title: How Much Does It Cost to Train a Machine Learning Model over Distributed Data Sources?
• Authors: Elia Guerra, Francesc Wilhelmi, Marco Miozzo, Paolo Dini
• Abstract summary: Federated learning allows devices to train a machine learning model without sharing their raw data. Server-less FL approaches like gossip federated learning (GFL) and blockchain-enabled federated learning (BFL) have been proposed to mitigate these issues. GFL is able to save the 18% of training time, the 68% of energy and the 51% of data to be shared with respect to the CFL solution, but it is not able to reach the level of accuracy of CFL. BFL represents a viable solution for implementing decentralized learning with a higher level of security, at the cost of an extra energy usage and data sharing
• Score: 4.222078489059043
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Federated learning (FL) is one of the most appealing alternatives to the standard centralized learning paradigm, allowing heterogeneous set of devices to train a machine learning model without sharing their raw data. However, FL requires a central server to coordinate the learning process, thus introducing potential scalability and security issues. In the literature, server-less FL approaches like gossip federated learning (GFL) and blockchain-enabled federated learning (BFL) have been proposed to mitigate these issues. In this work, we propose a complete overview of these three techniques proposing a comparison according to an integral set of performance indicators, including model accuracy, time complexity, communication overhead, convergence time and energy consumption. An extensive simulation campaign permits to draw a quantitative analysis. In particular, GFL is able to save the 18% of training time, the 68% of energy and the 51% of data to be shared with respect to the CFL solution, but it is not able to reach the level of accuracy of CFL. On the other hand, BFL represents a viable solution for implementing decentralized learning with a higher level of security, at the cost of an extra energy usage and data sharing. Finally, we identify open issues on the two decentralized federated learning implementations and provide insights on potential extensions and possible research directions on this new research field.

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