Book Image

Professional Azure SQL Managed Database Administration - Third Edition

By : Ahmad Osama, Shashikant Shakya
Book Image

Professional Azure SQL Managed Database Administration - Third Edition

By: Ahmad Osama, Shashikant Shakya

Overview of this book

Despite being the cloud version of SQL Server, Azure SQL Database and Azure SQL Managed Instance stands out in various aspects when it comes to management, maintenance, and administration. Updated with the latest Azure features, Professional Azure SQL Managed Database Administration continues to be a comprehensive guide for becoming proficient in data management. The book begins by introducing you to the Azure SQL managed databases (Azure SQL Database and Azure SQL Managed Instance), explaining their architecture, and how they differ from an on-premises SQL server. You will then learn how to perform common tasks, such as migrating, backing up, and restoring a SQL Server database to an Azure database. As you progress, you will study how you can save costs and manage and scale multiple SQL databases using elastic pools. You will also implement a disaster recovery solution using standard and active geo-replication. Finally, you will explore the monitoring and tuning of databases, the key features of databases, and the phenomenon of app modernization. By the end of this book, you will have mastered the key aspects of an Azure SQL database and Azure SQL managed instance, including migration, backup restorations, performance optimization, high availability, and disaster recovery.
Table of Contents (14 chapters)
13
Index

8. Elastic and instance pools

Azure SQL Database has two deployment options, a single database and an elastic pool. A single SQL database is an isolated, standalone database with dedicated resources (DTU or vCore). In all of our previous chapters, we have talked about Azure SQL Database single-database deployments.

An SQL elastic database pool is a group of two or more SQL databases with shared resources (eDTU and vCore) at a specific price.

In a multi-tenant scenario where there's one database for each customer, each database has a varying access pattern with different peak times and low average utilization. We'll see later in the chapter how grouping different customer databases in an SQL Database elastic pool saves costs without affecting performance.

This chapter will teach you how to manage and scale multiple SQL databases by using elastic database pools. You'll also learn how to implement elastic database jobs to manage and maintain databases in...