These Feast tutorials showcase how to use Feast to simplify end to end model training / serving.

When individuals apply for loans from banks and other credit providers, the decision to approve a loan application is often made through a statistical model. This model uses information about a customer to determine the likelihood that they will repay or default on a loan, in a process called credit scoring.

In this example, we will demonstrate how a real-time credit scoring system can be built using Feast and Scikit-Learn on AWS, using feature data from S3.

This real-time system accepts a loan request from a customer and responds within 100ms with a decision on whether their loan has been approved or rejected.

This end-to-end tutorial will take you through the following steps:

• Deploying S3 with Parquet as your primary data source, containing both and

• Deploying Redshift as the interface Feast uses to build training datasets

• Registering your features with Feast and configuring DynamoDB for online serving

Throughout this tutorial, we’ll walk through the creation of a production-ready fraud prediction system. A prediction is made in real-time as the user makes the transaction, so we need to be able to generate a prediction at low latency.

Fraud Detection Example

Our end-to-end example will perform the following workflows:

• Computing and backfilling feature data from raw data

• Building point-in-time correct training datasets from feature data and training a model

• Making online predictions from feature data

Here's a high-level picture of our system architecture on Google Cloud Platform (GCP):

In this example, you'll learn how to use some of the key functionality in Feast. The tutorial runs in both local mode and on the Google Cloud Platform (GCP). For GCP, you must have access to a GCP project already, including read and write permissions to BigQuery.

This tutorial guides you on how to use Feast with . You will learn how to:

In the steps below, we will set up a sample Feast project that leverages Snowflake as an offline store + materialization engine + online store.

Starting with data in a Snowflake table, we will register that table to the feature store and define features associated with the columns in that table. From there, we will generate historical training data based on those feature definitions and then materialize the latest feature values into the online store. Lastly, we will retrieve the materialized feature values.

Our template will generate new data containing driver statistics. From there, we will show you code snippets that will call to the offline store for generating training datasets, and then the code for calling the online store to serve you the latest feature values to serve models in production.

Snowflake Offline Store Example

Install feast-snowflake

Get a Snowflake Trial Account (Optional)

Create a feature repository

The following files will automatically be created in your project folder:

• feature_store.yaml -- This is your main configuration file

• driver_repo.py -- This is your main feature definition file

• test.py -- This is a file to test your feature store configuration

Inspect feature_store.yaml

Here you will see the information that you entered. This template will use Snowflake as the offline store, materialization engine, and the online store. The main thing to remember is by default, Snowflake objects have ALL CAPS names unless lower case was specified.

Run our test python script test.py

What we did in test.py

Initialize our Feature Store

Create a dummy training dataframe, then call our offline store to add additional columns

Materialize the latest feature values into our online store

Retrieve the latest values from our online store based on our entity key