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DistBelief: model/data parallelism with Downpour and Sandblaster

Contribution grade

Distributed deep-learning training systems · Human-designed research method or resource

Reference score180,000Provisional editorial estimate of this exact contribution; its grade is assessed separately.

What changed

Partitioned neural computation across machines and replicas, combining asynchronous Downpour SGD and coordinated distributed batch optimization through sharded parameter storage.

Scientific scope

Partitioned neural computation across machines and replicas, combining asynchronous Downpour SGD and coordinated distributed batch optimization through sharded parameter storage. System/algorithm integration inherits SGD, L-BFGS, Adagrad and earlier distributed optimization, not their invention or first parameter-server concept. Scaling benefits depend on connectivity, resource allocation, communication and staleness; not unconstrained neural convergence or universal speedup.

Evidence

The linked original sources describe the stated contribution and its evidence limits. WRS has not independently rerun the experiments or certified a proof. System/algorithm integration inherits SGD, L-BFGS, Adagrad and earlier distributed optimization, not their invention or first parameter-server concept. Scaling benefits depend on connectivity, resource allocation, communication and staleness; not unconstrained neural convergence or universal speedup.

Contributors

Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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