Book Image

Data Engineering with Apache Spark, Delta Lake, and Lakehouse

By : Manoj Kukreja
5 (2)
Book Image

Data Engineering with Apache Spark, Delta Lake, and Lakehouse

5 (2)
By: Manoj Kukreja

Overview of this book

In the world of ever-changing data and schemas, it is important to build data pipelines that can auto-adjust to changes. This book will help you build scalable data platforms that managers, data scientists, and data analysts can rely on. Starting with an introduction to data engineering, along with its key concepts and architectures, this book will show you how to use Microsoft Azure Cloud services effectively for data engineering. You'll cover data lake design patterns and the different stages through which the data needs to flow in a typical data lake. Once you've explored the main features of Delta Lake to build data lakes with fast performance and governance in mind, you'll advance to implementing the lambda architecture using Delta Lake. Packed with practical examples and code snippets, this book takes you through real-world examples based on production scenarios faced by the author in his 10 years of experience working with big data. Finally, you'll cover data lake deployment strategies that play an important role in provisioning the cloud resources and deploying the data pipelines in a repeatable and continuous way. By the end of this data engineering book, you'll know how to effectively deal with ever-changing data and create scalable data pipelines to streamline data science, ML, and artificial intelligence (AI) tasks.
Table of Contents (17 chapters)
1
Section 1: Modern Data Engineering and Tools
5
Section 2: Data Pipelines and Stages of Data Engineering
11
Section 3: Data Engineering Challenges and Effective Deployment Strategies

Understanding concurrency control

By now, hopefully, we have a good understanding of ACID compliance in a Delta Lake using the transaction log. Up until now, all operations during this exercise were performed using the same user. However, in a real case scenario, you can have multiple users trying to read and write to the same delta table at the same time. This is how concurrency controls are implemented in Delta Lake.

Figure 6.43 – Concurrency control in Delta Lake

This is better represented as follows:

  • Assume User 1 and User 2 perform a write operation to a delta table at the same time.
  • Delta Lake records the version of the table before any change has been made to the delta table.
  • The write from User 1 commits successfully, and a success message is sent back.
  • The write from User 2 does not fail. Instead, Delta Lake tries to silently resolve conflicts from User 2's transaction against the previously committed data. If no conflicts...