Creating feature groups
In Amazon SageMaker Feature Store, features are stored in a collection called a feature group. A feature group, in turn, is composed of records of features and feature values. Each record is a collection of feature values, identified by a unique RecordIdentifier value. Every record belonging to a feature group will use the same feature as RecordIdentifier. For example, the record identifier for the feature store created for the weather data could be parameter_id or location_id. Think of RecordIdentifier as a primary key for the feature group. Using this primary key, you can query feature groups for the fast lookup of features. It's also important to note that each record of a feature group must, at a minimum, contain a RecordIdentifier and an event time feature. The event time feature is identified by EventTimeFeatureName when a feature group is set up. When a feature record is ingested into a feature group, SageMaker adds three features – is_deleted...
