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

7. Scalability

You can easily scale up or scale down an SQL database or managed instance, either automatically or manually. There are two types of scaling: vertical and horizontal.

Vertical scaling refers to switching to a higher or lower service tier or vertically partitioning data, which is done to store different schemas on different databases.

Horizontal scaling refers to dividing data from a single table into different individual databases.

This chapter will teach you how to autoscale SQL databases and shard a database. The chapter also talks about how to run cross-database queries.

By the end of this chapter, you will be able to:

  • Perform vertical and horizontal scaling.
  • Create and maintain SQL database shards.
  • Run cross-database elastic queries.
  • Scale a managed instance.

This chapter covers how to vertically and horizontally scale your system to optimize the performance of your application.