Book Image

Machine Learning at Scale with H2O

By : Gregory Keys, David Whiting
Book Image

Machine Learning at Scale with H2O

By: Gregory Keys, David Whiting

Overview of this book

H2O is an open source, fast, and scalable machine learning framework that allows you to build models using big data and then easily productionalize them in diverse enterprise environments. Machine Learning at Scale with H2O begins with an overview of the challenges faced in building machine learning models on large enterprise systems, and then addresses how H2O helps you to overcome them. You’ll start by exploring H2O’s in-memory distributed architecture and find out how it enables you to build highly accurate and explainable models on massive datasets using your favorite ML algorithms, language, and IDE. You’ll also get to grips with the seamless integration of H2O model building and deployment with Spark using H2O Sparkling Water. You’ll then learn how to easily deploy models with H2O MOJO. Next, the book shows you how H2O Enterprise Steam handles admin configurations and user management, and then helps you to identify different stakeholder perspectives that a data scientist must understand in order to succeed in an enterprise setting. Finally, you’ll be introduced to the H2O AI Cloud platform and explore the entire machine learning life cycle using multiple advanced AI capabilities. By the end of this book, you’ll be able to build and deploy advanced, state-of-the-art machine learning models for your business needs.
Table of Contents (22 chapters)
1
Section 1 – Introduction to the H2O Machine Learning Platform for Data at Scale
5
Section 2 – Building State-of-the-Art Models on Large Data Volumes Using H2O
11
Section 3 – Deploying Your Models to Production Environments
14
Section 4 – Enterprise Stakeholder Perspectives
17
Section 5 – Broadening the View – Data to AI Applications with the H2O AI Cloud Platform

Putting it all together – algorithms, feature engineering, grid search, and AutoML

The H2O AutoML implementation is simple yet powerful, so why would we ever need grid search? In fact, for a lot of real-world enterprise use cases, any of the top candidates in an AutoML leaderboard would be great models to put into production. This is especially true of the stacked ensemble models produced by AutoML.

However, our coverage of grid search was not just to satisfy intellectual curiosity. A more involved process, which we will outline next, uses AutoML followed by a customized grid search to discover and fine-tune model performance.

An enhanced AutoML procedure

Here are the steps:

  1. Start by running AutoML on your data to create a baseline leaderboard. You can investigate leading models, gain an understanding of the runtimes required to fit algorithms to your data, and more, which may inform future AutoML parameter choices and expectations.
  2. The second stage is feature...