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Variance Reduction is an Antidote to Byzantines: Better Rates, Weaker Assumptions and Communication Compression as a Cherry on the Top

ICLR 2023 · Optimization › Distributed and compressed · approach: Error feedback theory · 5 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use variance-reduced Byz-VR-MARINA instead of the SGD baselineDistributed logistic regression with Byzantine workers · a9a, homogeneous clients, clean and adversarial attacksconvergence rateHelped
Use Byz-VR-MARINA instead of compressed SGD or BR-DIANADistributed logistic regression with compressed communication · a9a, attacks other than bit flippingoptimality gapHelped
Use Byz-VR-MARINA instead of compressed SGD or BR-DIANADistributed logistic regression with compressed communication · a9a, bit flipping attackoptimality gapMixed
Add RandK sparsification with K = 0.1 d (ablation)Byz-VR-MARINA · a9a, ALIE attackcommunication costHelped
Use importance sampling instead of uniform sampling for stochastic gradient differences (ablation)Byz-VR-MARINA · Stochastic gradient samplingcommunication-round complexityHelped

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