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

Vertical scaling

Vertical scaling refers to increasing or decreasing the resources of an SQL database or managed instance. The resources here refer to DTUs for DTU-based purchasing models and vCores for vCore-based purchasing models.

Vertical scaling can be of two types: scale-up or scale-down service tiers, or vertical partitions.

Scale-up or scale-down service tiers

Scaling up a service tier refers to switching to a higher service tier; for example, switching from General Purpose to Business Critical or switching from General Purpose GP_Gen5_2 to General Purpose GP_Gen5_4.

Scaling down a service tier refers to switching to a lower service tier; for example, switching from General Purpose GP_Gen5_4 to General Purpose GP_Gen5_2, or switching from Business Critical to General Purpose.

Scaling up a service tier allows you to maintain or improve database performance during peak business hours and scaling down a service tier allows you to save costs during off-peak business...