调研了一下，主要方法有：
- Brute Force
- Database
- Dato
- TensorFlow Serving
- Azure
- Pickle (do not use, vunerable)
- skitlearn joblib
- http://scikit-learn.org/stable/modules/model_persistence.html
- PMML + openscoring
- http://nerds.airbnb.com/architecting-machine-learning-system-risk/
