Related papers: Shadowheart SGD: Distributed Asynchronous SGD with Optimal Time Complexity Under Arbitrary Computation and Communication Heterogeneity

Shadowheart SGD: Distributed Asynchronous SGD with Optimal Time Complexity Under Arbitrary Computation and Communication Heterogeneity

URL: http://arxiv.org/abs/2402.04785v1
Date: Wed, 7 Feb 2024 12:15:56 GMT
Title: Shadowheart SGD: Distributed Asynchronous SGD with Optimal Time Complexity Under Arbitrary Computation and Communication Heterogeneity
Authors: Alexander Tyurin, Marta Pozzi, Ivan Ilin, Peter Richt\'arik
Abstract summary: We develop a new method-Shadowheart SGD-that provably improves the time complexities of all previous centralized methods. We also consider the bidirectional setup, where broadcasting from the server to the workers is non-negligible, and develop a corresponding method.
Score: 47.72739923439599
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We consider nonconvex stochastic optimization problems in the asynchronous centralized distributed setup where the communication times from workers to a server can not be ignored, and the computation and communication times are potentially different for all workers. Using an unbiassed compression technique, we develop a new method-Shadowheart SGD-that provably improves the time complexities of all previous centralized methods. Moreover, we show that the time complexity of Shadowheart SGD is optimal in the family of centralized methods with compressed communication. We also consider the bidirectional setup, where broadcasting from the server to the workers is non-negligible, and develop a corresponding method.

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