English

Personalized Federated Learning: A Unified Framework and Universal Optimization Techniques

Machine Learning 2023-05-30 v4

Abstract

We investigate the optimization aspects of personalized Federated Learning (FL). We propose general optimizers that can be applied to numerous existing personalized FL objectives, specifically a tailored variant of Local SGD and variants of accelerated coordinate descent/accelerated SVRCD. By examining a general personalized objective capable of recovering many existing personalized FL objectives as special cases, we develop a comprehensive optimization theory applicable to a wide range of strongly convex personalized FL models in the literature. We showcase the practicality and/or optimality of our methods in terms of communication and local computation. Remarkably, our general optimization solvers and theory can recover the best-known communication and computation guarantees for addressing specific personalized FL objectives. Consequently, our proposed methods can serve as universal optimizers, rendering the design of task-specific optimizers unnecessary in many instances.

Keywords

Cite

@article{arxiv.2102.09743,
  title  = {Personalized Federated Learning: A Unified Framework and Universal Optimization Techniques},
  author = {Filip Hanzely and Boxin Zhao and Mladen Kolar},
  journal= {arXiv preprint arXiv:2102.09743},
  year   = {2023}
}
R2 v1 2026-06-23T23:18:53.441Z