The Anatomy of a Production-Scale Continuously-Training Machine Learning Platform Denis Baylor (Google Inc.) Eric Breck (Google Inc.) Heng-Tze Cheng (Google Inc.) Noah Fiedel (Google Inc.) Chuan Yu Foo (Google Inc.) Zakaria Haque (Google Inc.) Salem Haykal (Google Inc.) Mustafa Ispir (Google Inc.) Vihan Jain (Google Inc.) Levent Koc (Google Inc.) Chiu Yuen Koo (Google Inc.) Lukasz Lew (Google Inc.) Clemens Mewald (Google Inc.) Akshay Modi (Google Inc.) Neoklis Polyzotis (Google Inc.) Sukriti Ramesh (Google Inc.) Sudip Roy (Google Inc.) Steven Whang (Google Inc.) Martin Wicke (Google Inc.) Jarek Wilkiewicz (Google Inc.) Xin Zhang (Google Inc.) Martin Zinkevich (Google Inc.) Creating and maintaining a platform for reliably producing and deploying machine learning models requires careful orchestration of many components—-a learner for generating models based on training data, modules for analyzing and validating both data as well as models, and finally infrastructure for serving models in production. This becomes particularly challenging when data changes over time and fresh models need to be produced continuously. Unfortunately, such orchestration is often done ad hoc using glue code and custom scripts developed by individual teams for specific use cases, leading to duplicated effort and fragile systems with high technical debt. We present the anatomy of a general-purpose machine learning platform and one implementation of such a platform at Google. By integrating the aforementioned components into one platform, we were able to standardize the components, simplify the platform configuration, and reduce the time to production from the order of months to weeks, while providing platform stability [More]