Book Image

Pretrain Vision and Large Language Models in Python

By : Emily Webber
4.5 (2)
Book Image

Pretrain Vision and Large Language Models in Python

4.5 (2)
By: Emily Webber

Overview of this book

Foundation models have forever changed machine learning. From BERT to ChatGPT, CLIP to Stable Diffusion, when billions of parameters are combined with large datasets and hundreds to thousands of GPUs, the result is nothing short of record-breaking. The recommendations, advice, and code samples in this book will help you pretrain and fine-tune your own foundation models from scratch on AWS and Amazon SageMaker, while applying them to hundreds of use cases across your organization. With advice from seasoned AWS and machine learning expert Emily Webber, this book helps you learn everything you need to go from project ideation to dataset preparation, training, evaluation, and deployment for large language, vision, and multimodal models. With step-by-step explanations of essential concepts and practical examples, you’ll go from mastering the concept of pretraining to preparing your dataset and model, configuring your environment, training, fine-tuning, evaluating, deploying, and optimizing your foundation models. You will learn how to apply the scaling laws to distributing your model and dataset over multiple GPUs, remove bias, achieve high throughput, and build deployment pipelines. By the end of this book, you’ll be well equipped to embark on your own project to pretrain and fine-tune the foundation models of the future.
Table of Contents (23 chapters)
1
Part 1: Before Pretraining
5
Part 2: Configure Your Environment
9
Part 3: Train Your Model
13
Part 4: Evaluate Your Model
17
Part 5: Deploy Your Model

Bringing it all home with examples from models today

Remember we learned earlier in the book that truly every state-of-the-art model requires some amount of distribution. This is because good models come from good datasets, and good datasets are large. These take time to process, so you need to distribute your processes in order to complete them in a timely manner. Some of them have models that are too big to fit on a single GPU, so they’ll require some amount of model parallelism. But others have models that are quite small, meaning they will only require data parallelism. Let’s step through two examples from top models today: Stable Diffusion and GPT-2.

Stable Diffusion – data parallelism at scale

Stable Diffusion is a fascinating model that enables you to create images from text. Once trained, you can simply provide textual input to Stable Diffusion, and it will generate a new picture for you! While researchers have been attempting this since at least...