Accelerate Distributed Stochastic Descent for Nonconvex Optimization with Momentum
Machine Learning
2021-10-05 v1 Artificial Intelligence
Optimization and Control
Abstract
Momentum method has been used extensively in optimizers for deep learning. Recent studies show that distributed training through K-step averaging has many nice properties. We propose a momentum method for such model averaging approaches. At each individual learner level traditional stochastic gradient is applied. At the meta-level (global learner level), one momentum term is applied and we call it block momentum. We analyze the convergence and scaling properties of such momentum methods. Our experimental results show that block momentum not only accelerates training, but also achieves better results.
Cite
@article{arxiv.2110.00625,
title = {Accelerate Distributed Stochastic Descent for Nonconvex Optimization with Momentum},
author = {Guojing Cong and Tianyi Liu},
journal= {arXiv preprint arXiv:2110.00625},
year = {2021}
}