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Dec 10, 2018


unit-tests integration-tests linter Docs Latest Python API License GitHub Release

Overview

Feast is an open source feature store for machine learning. Feast is the fastest path to productionizing analytic data for model training and online inference.

Please see our documentation for more information about the project.

📐 Architecture

The above architecture is the minimal Feast deployment. Want to run the full Feast on GCP/AWS? Click here.

🐣 Getting Started

1. Install Feast

pip install feast

2. Create a feature repository

feast init my_feature_repo
cd my_feature_repo

3. Register your feature definitions and set up your feature store

feast apply

4. Build a training dataset

from feast import FeatureStore
import pandas as pd
from datetime import datetime

entity_df = pd.DataFrame.from_dict({
    "driver_id": [1001, 1002, 1003, 1004],
    "event_timestamp": [
        datetime(2021, 4, 12, 10, 59, 42),
        datetime(2021, 4, 12, 8,  12, 10),
        datetime(2021, 4, 12, 16, 40, 26),
        datetime(2021, 4, 12, 15, 1 , 12)
    ]
})

store = FeatureStore(repo_path=".")

training_df = store.get_historical_features(
    entity_df=entity_df,
    features = [
        'driver_hourly_stats:conv_rate',
        'driver_hourly_stats:acc_rate',
        'driver_hourly_stats:avg_daily_trips'
    ],
).to_df()

print(training_df.head())

# Train model
# model = ml.fit(training_df)
            event_timestamp  driver_id  conv_rate  acc_rate  avg_daily_trips
0 2021-04-12 08:12:10+00:00       1002   0.713465  0.597095              531
1 2021-04-12 10:59:42+00:00       1001   0.072752  0.044344               11
2 2021-04-12 15:01:12+00:00       1004   0.658182  0.079150              220
3 2021-04-12 16:40:26+00:00       1003   0.162092  0.309035              959

5. Load feature values into your online store

CURRENT_TIME=$(date -u +"%Y-%m-%dT%H:%M:%S")
feast materialize-incremental $CURRENT_TIME
Materializing feature view driver_hourly_stats from 2021-04-14 to 2021-04-15 done!

6. Read online features at low latency

from pprint import pprint
from feast import FeatureStore

store = FeatureStore(repo_path=".")

feature_vector = store.get_online_features(
    features=[
        'driver_hourly_stats:conv_rate',
        'driver_hourly_stats:acc_rate',
        'driver_hourly_stats:avg_daily_trips'
    ],
    entity_rows=[{"driver_id": 1001}]
).to_dict()

pprint(feature_vector)

# Make prediction
# model.predict(feature_vector)
{
    "driver_id": [1001],
    "driver_hourly_stats__conv_rate": [0.49274],
    "driver_hourly_stats__acc_rate": [0.92743],
    "driver_hourly_stats__avg_daily_trips": [72]
}

📦 Functionality and Roadmap

The list below contains the functionality that contributors are planning to develop for Feast

  • Items below that are in development (or planned for development) will be indicated in parentheses.

  • We welcome contribution to all items in the roadmap!

  • Want to influence our roadmap and prioritization? Submit your feedback to this form.

  • Want to speak to a Feast contributor? We are more than happy to jump on a call. Please schedule a time using Calendly.

  • Data Sources

  • Offline Stores

  • Online Stores

  • Streaming

  • Feature Engineering

    • On-demand Transformations (Development in progress. See RFC)
    • Batch transformation (SQL)
    • Streaming transformation
  • Deployments

    • AWS Lambda (Development in progress. See RFC)
    • Cloud Run
    • Kubernetes
    • KNative
  • Feature Serving

    • Python Client
    • REST Feature Server (Python) (Development in progress. See RFC)
    • gRPC Feature Server (Java) (See #1497)
    • Java Client
    • Go Client
    • Push API
    • Delete API
    • Feature Logging (for training)
  • Data Quality Management

    • Data profiling and validation (Great Expectations) (Planned for Q4 2021)
    • Metric production
    • Training-serving skew detection
    • Drift detection
    • Alerting
  • Feature Discovery and Governance

    • Python SDK for browsing feature registry
    • CLI for browsing feature registry
    • Model-centric feature tracking (feature services)
    • REST API for browsing feature registry
    • Feast Web UI (Planned for Q4 2021)
    • Feature versioning
    • Amundsen integration

🎓 Important Resources

Please refer to the official documentation at Documentation

👋 Contributing

Feast is a community project and is still under active development. Please have a look at our contributing and development guides if you want to contribute to the project:

Contributors

Thanks goes to these incredible people: