Amazon SageMaker Feature Store: Introduction to Feature Store

This notebook demonstrates how to get started with Feature Store, create feature groups, and ingest data into them. These feature groups are stored in your Feature Store.

Feature groups are resources that contain metadata for all data stored in your Feature Store. A feature group is a logical grouping of features, defined in the feature store to describe records. A feature group’s definition is composed of a list of feature definitions, a record identifier name, and configurations for its online and offline store.

Overview

  1. Set up

  2. Creating a feature group

  3. Ingest data into a feature group

Prerequisites

This notebook uses both boto3 and Python SDK libraries, and the Python 3 (Data Science) kernel. This notebook works with Studio, Jupyter, and JupyterLab.

Library dependencies:

  • sagemaker>=2.0.0

  • numpy

  • pandas

Role requirements:

IMPORTANT: You must attach the following policies to your execution role: * AmazonS3FullAccess * AmazonSageMakerFeatureStoreAccess

Feature Store Policy

Set up

[ ]:
# SageMaker Python SDK version 2.x is required
import sagemaker
import sys

original_version = sagemaker.__version__
%pip install 'sagemaker>=2.0.0'
[ ]:
import boto3
import pandas as pd
import numpy as np
import io
from sagemaker.session import Session
from sagemaker import get_execution_role

prefix = "sagemaker-featurestore-introduction"
role = get_execution_role()

sagemaker_session = sagemaker.Session()
region = sagemaker_session.boto_region_name
s3_bucket_name = sagemaker_session.default_bucket()

Inspect your data

In this notebook example we ingest synthetic data. We read from ./data/feature_store_introduction_customer.csv and ./data/feature_store_introduction_orders.csv.

[ ]:
customer_data = pd.read_csv("data/feature_store_introduction_customer.csv")
orders_data = pd.read_csv("data/feature_store_introduction_orders.csv")
[ ]:
customer_data.head()
[ ]:
orders_data.head()

Below is an illustration on the steps the data goes through before it is ingested into a Feature Store. In this notebook, we illustrate the use-case where you have data from multiple sources and want to store them independently in a feature store. Our example considers data from a data warehouse (customer data), and data from a real-time streaming service (order data).

Feature Store Policy

Create a feature group

We first start by creating feature group names for customer_data and orders_data. Following this, we create two Feature Groups, one for customer_data and another for orders_data

[ ]:
from time import gmtime, strftime, sleep

customers_feature_group_name = "customers-feature-group-" + strftime("%d-%H-%M-%S", gmtime())
orders_feature_group_name = "orders-feature-group-" + strftime("%d-%H-%M-%S", gmtime())

Instantiate a FeatureGroup object for customers_data and orders_data.

[ ]:
from sagemaker.feature_store.feature_group import FeatureGroup

customers_feature_group = FeatureGroup(
    name=customers_feature_group_name, sagemaker_session=sagemaker_session
)
orders_feature_group = FeatureGroup(
    name=orders_feature_group_name, sagemaker_session=sagemaker_session
)
[ ]:
import time

current_time_sec = int(round(time.time()))

record_identifier_feature_name = "customer_id"

Append EventTime feature to your data frame. This parameter is required, and time stamps each data point.

[ ]:
customer_data["EventTime"] = pd.Series([current_time_sec] * len(customer_data), dtype="float64")
orders_data["EventTime"] = pd.Series([current_time_sec] * len(orders_data), dtype="float64")

Load feature definitions to your feature group.

[ ]:
customers_feature_group.load_feature_definitions(data_frame=customer_data)
orders_feature_group.load_feature_definitions(data_frame=orders_data)

Below we call create to create two feature groups, customers_feature_group and orders_feature_group respectively

[ ]:
customers_feature_group.create(
    s3_uri=f"s3://{s3_bucket_name}/{prefix}",
    record_identifier_name=record_identifier_feature_name,
    event_time_feature_name="EventTime",
    role_arn=role,
    enable_online_store=True,
)

orders_feature_group.create(
    s3_uri=f"s3://{s3_bucket_name}/{prefix}",
    record_identifier_name=record_identifier_feature_name,
    event_time_feature_name="EventTime",
    role_arn=role,
    enable_online_store=True,
)

To confirm that your FeatureGroup has been created we use DescribeFeatureGroup and ListFeatureGroups APIs to display the created FeatureGroup.

[ ]:
customers_feature_group.describe()
[ ]:
orders_feature_group.describe()
[ ]:
sagemaker_session.boto_session.client(
    "sagemaker", region_name=region
).list_feature_groups()  # We use the boto client to list FeatureGroups

Ingest data into a feature group

After the FeatureGroups have been created, we can put data into the FeatureGroups by using the PutRecord API. It will take < 1min to ingest data both of these FeatureGroups.

[ ]:
def check_feature_group_status(feature_group):
    status = feature_group.describe().get("FeatureGroupStatus")
    while status == "Creating":
        print("Waiting for Feature Group to be Created")
        time.sleep(5)
        status = feature_group.describe().get("FeatureGroupStatus")
    print(f"FeatureGroup {feature_group.name} successfully created.")


check_feature_group_status(customers_feature_group)
check_feature_group_status(orders_feature_group)
[ ]:
customers_feature_group.ingest(data_frame=customer_data, max_workers=3, wait=True)
[ ]:
orders_feature_group.ingest(data_frame=orders_data, max_workers=3, wait=True)

Using an arbirary customer record id, 573291 we use get_record to check that the data has been ingested into the feature group.

[ ]:
customer_id = 573291
sample_record = sagemaker_session.boto_session.client(
    "sagemaker-featurestore-runtime", region_name=region
).get_record(
    FeatureGroupName=customers_feature_group_name, RecordIdentifierValueAsString=str(customer_id)
)
[ ]:
sample_record

Clean up

Here we remove the Feature Groups we created.

[ ]:
customers_feature_group.delete()
orders_feature_group.delete()
[ ]:
# preserve original sagemaker version
%pip install 'sagemaker=={}'.format(original_version)

Next steps

In this notebook you learnt how to quickly get started with Feature Store and now know how to create feature groups, and ingest data into them.

For an advanced example on how to use Feature Store for a Fraud Detection use-case, see Fraud Detection with Feature Store.

For detailed information about Feature Store, see the Developer Guide.

Programmers note

In this notebook we used a variety of different API calls. Most of them are accessible through the Python SDK, however some only exist within boto3. You can invoke the Python SDK API calls directly on your Feature Store objects, whereas to invoke API calls that exist within boto3, you must first access a boto client through your boto and sagemaker sessions: e.g.,sagemaker_session.boto_session.client().

Below we list API calls used in this notebook that exist within the Python SDK and ones that exist in boto3 for your reference.

Python SDK API Calls

  • describe()

  • ingest()

  • delete()

  • create()

  • load_feature_definitions()

Boto3 API Calls

  • list_feature_groups()

  • get_record()