Book Image

Distributed Data Systems with Azure Databricks

By : Alan Bernardo Palacio
Book Image

Distributed Data Systems with Azure Databricks

By: Alan Bernardo Palacio

Overview of this book

Microsoft Azure Databricks helps you to harness the power of distributed computing and apply it to create robust data pipelines, along with training and deploying machine learning and deep learning models. Databricks' advanced features enable developers to process, transform, and explore data. Distributed Data Systems with Azure Databricks will help you to put your knowledge of Databricks to work to create big data pipelines. The book provides a hands-on approach to implementing Azure Databricks and its associated methodologies that will make you productive in no time. Complete with detailed explanations of essential concepts, practical examples, and self-assessment questions, you’ll begin with a quick introduction to Databricks core functionalities, before performing distributed model training and inference using TensorFlow and Spark MLlib. As you advance, you’ll explore MLflow Model Serving on Azure Databricks and implement distributed training pipelines using HorovodRunner in Databricks. Finally, you’ll discover how to transform, use, and obtain insights from massive amounts of data to train predictive models and create entire fully working data pipelines. By the end of this MS Azure book, you’ll have gained a solid understanding of how to work with Databricks to create and manage an entire big data pipeline.
Table of Contents (17 chapters)
1
Section 1: Introducing Databricks
4
Section 2: Data Pipelines with Databricks
9
Section 3: Machine and Deep Learning with Databricks

Optimizing file management with Delta Engine

Delta Engine allows improved management of files in Delta Lake, yielding better query speed, thanks to optimization in the layout of the stored data. Delta Lake does this by using two types of algorithms: bin-packing and Z-Ordering. The first algorithm is useful when merging small files into larger ones and is more efficient in handling the larger ones. The second algorithm is borrowed from mathematical analysis and is applied to the underlying structure of the data to map multiple dimensions into one dimension while preserving the locality of the data points.

In this section, we will learn how these algorithms work, see how to implement them using commands that act on our data, and how to handle snapshots of data thanks to the time travel feature.

It is good to remember that although there are automatic optimizations that take place when we use Delta Lake, most of these optimizations do not occur automatically, and some of them must...