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

H2O MOJO deep dive

All MOJOs are fundamentally similar from a deployment and scoring standpoint. This is true regardless of the MOJO's origin from an upstream model-building standpoint, that is, regardless of which of H2O's wide diversity of model-building algorithms (for example, Generalized Linear Model, and XGBoost) and techniques (for example, Stacked Ensembles and AutoML) and training dataset sizes (from GBs to TBs) were used to build the final model.

Let's get to know the MOJO in greater detail.

What is a MOJO?

A MOJO stands for Model Object, Optimized. It is exported from your model-building IDE by running the following line of code:

model.download_mojo(path="path/for/my/mojo")

This downloads a uniquely-named .zip file onto the filesystem of your IDE, to the path you specified. This .zip file is the MOJO and this is what is deployed. You do not unzip it, but if you are curious, it contains a model.ini file that describes the MOJO as well...