Chronon, Airbnb’s ML Feature Platform, Is Now Open Source

Chronon, an open-source ML Feature Platform, empowers ML practitioners to utilize diverse data sources for feature transformations. It streamlines data engineering complexities, provides low-latency serving, and offers observability and management tools. Chronon enables ML practitioners to define features once, supporting both offline training and online inference. It features components like GroupBy, Join, and Fetch API for aggregating, combining, and retrieving features with high accuracy. Chronon's backfill process ensures point-in-time accuracy and handles data skewness efficiently. It also provides low-latency feature serving through a fetch API and monitors online-offline consistency. Chronon's vision is to enhance the efficiency of feature engineering, reduce computation costs, and make feature authoring more accessible. Its roadmap aims to lower iteration and computation costs, simplify feature creation, and explore natural language processing for feature expression.