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

Using different sources with continous streams

Streams of data can come from a variety of sources. Structured Streaming provides support from extracting data from sources such as Delta tables, publish/subscribe (pub/sub) systems such as Azure Event Hubs, and more. We will review some of these sources in the next sections to learn how we can connect these streams of data into our jobs running in Azure Databricks.

Using a Delta table as a stream source

As mentioned in the previous chapter, you can use Structured Streaming with Delta Lake using the readStream and writeStream Spark methods, with a particular focus on overcoming issues related to handling and processing small files, managing batch jobs, and detecting new files efficiently.

When a Delta table is used as a data stream source, all the queries done on that table will process the information on that table as well as any data that has arrived since the stream started.

In the next example, we will load both the path...