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Train and Distribute: Managing Simplicity vs. Flexibility in High-Level Machine Learning Frameworks

KDD Papers

Train and Distribute: Managing Simplicity vs. Flexibility in High-Level Machine Learning Frameworks

Heng-Tze Cheng (Google);Lichan Hong (Google);Mustafa Ispir (Google);Clemens Mewald (Google);Zakaria Haque (Google);Illia Polosukhin (Google);Georgios Roumpos (Google);D Sculley (Google);Jamie Smith (Google);David Soergel (Google);Yuan Tang (Uptake Technologies);Philipp Tucker (Google);Martin Wicke (Google);Cassandra Xia (Google);Jianwei Xie (Google)


We present a framework for specifying, training, evaluating, and deploying machine learning models. Our focus is on simplifying cutting edge machine learning for practitioners in order to bring such technologies into production. Recognizing the fast evolution of the field of deep learning, we make no attempt to capture the design space of all possible model architectures in a domain-specific language (DSL) or similar configuration language. We allow users to write code to define their models, but provide abstractions that guide developers to write models in ways conducive to productionization. We also provide a unifying Estimator interface, making it possible to write downstream infrastructure (e.g. distributed training, hyperparameter tuning) independent of the model implementation. We balance the competing demands for flexibility and simplicity by offering APIs at different levels of abstraction, making common model architectures available “out of the box”, while providing a library of utilities designed to speed up experimentation with model architectures. To make out of the box models flexible and usable across a wide range of problems, these canned Estimators are parameterized not only over traditional hyperparameters, but also using feature columns, a declarative specification describing how to interpret input data. We discuss our experience in using this framework in research and production environments, and show the impact on code health, maintainability, and development speed.