Amazon SageMaker Feature Store consists of an online store and an offline store. The online store enables real-time lookup of features for inference, while the offline store contains historical data for model training and batch inference. When creating a feature group, you have the option of enabling either the online store, offline store, or both. When you enable both, they sync to avoid discrepancies between training and serving data. For more information about the online and offline stores and other Feature Store concepts, see Feature Store concepts.
The following topics discuss online store storage types and offline store table formats.
