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

Using the built-in CV algorithms

In this section, we're going to train and deploy models with all three algorithms using public image datasets. We will cover both training from scratch and transfer learning.

Training an image classification model

In this first example, let's use the image classification algorithm to build a model classifying the Dogs vs. Cats dataset that we prepared in a previous section. We'll first train using image format, and then using RecordIO format.

Training in image format

We will begin training using the following steps:

  1. In a Jupyter notebook, we define the appropriate data paths:
    import sagemaker
    sess = sagemaker.Session()
    bucket = sess.default_bucket()
    prefix = 'dogscats-images'
    s3_train_path = 
      's3://{}/{}/input/train/'.format(bucket, prefix)
    s3_val_path = 
      's3://{}/{}/input/val/'.format(bucket, prefix)
    s3_train_lst_path = 
      's3://{}/{}/input/train_lst...