Book Image

Learn Amazon SageMaker - Second Edition

By : Julien Simon
Book Image

Learn Amazon SageMaker - Second Edition

By: Julien Simon

Overview of this book

Amazon SageMaker enables you to quickly build, train, and deploy machine learning models at scale without managing any infrastructure. It helps you focus on the machine learning problem at hand and deploy high-quality models by eliminating the heavy lifting typically involved in each step of the ML process. This second edition will help data scientists and ML developers to explore new features such as SageMaker Data Wrangler, Pipelines, Clarify, Feature Store, and much more. You'll start by learning how to use various capabilities of SageMaker as a single toolset to solve ML challenges and progress to cover features such as AutoML, built-in algorithms and frameworks, and writing your own code and algorithms to build ML models. The book will then show you how to integrate Amazon SageMaker with popular deep learning libraries, such as TensorFlow and PyTorch, to extend the capabilities of existing models. You'll also see how automating your workflows can help you get to production faster with minimum effort and at a lower cost. Finally, you'll explore SageMaker Debugger and SageMaker Model Monitor to detect quality issues in training and production. By the end of this Amazon book, you'll be able to use Amazon SageMaker on the full spectrum of ML workflows, from experimentation, training, and monitoring to scaling, deployment, and automation.
Table of Contents (19 chapters)
1
Section 1: Introduction to Amazon SageMaker
4
Section 2: Building and Training Models
11
Section 3: Diving Deeper into Training
14
Section 4: Managing Models in Production

Optimizing hyperparameters with automatic model tuning

Hyperparameters have a huge influence on the training outcome. Just like in chaos theory, tiny variations of a single hyperparameter can cause wild swings in accuracy. In most cases, the "why?" evades us, leaving us perplexed about what to try next.

Over the years, several techniques have been devised to try to solve the problem of selecting optimal hyperparameters:

  1. Manual search: This means using our best judgment and experience to select the "best" hyperparameters. Let's face it: this doesn't really work, especially with deep learning and its horde of training and network architecture parameters.
  2. Grid search: This entails systematically exploring the hyperparameter space, zooming in on hot spots, and repeating the process. This is much better than a manual search. However, this usually requires training hundreds of jobs. Even with scalable infrastructure, the time and dollar budgets...