Book Image

Professional Azure SQL Database Administration - Second Edition

By : Ahmad Osama
Book Image

Professional Azure SQL Database Administration - Second Edition

By: Ahmad Osama

Overview of this book

Despite being the cloud version of SQL Server, Azure SQL Database differs in key ways when it comes to management, maintenance, and administration. This book shows you how to administer Azure SQL Database to fully benefit from its wide range of features and functionalities. Professional Azure SQL Database Administration begins by covering the architecture and explaining the difference between Azure SQL Database and the on-premise SQL Server to help you get comfortable with Azure SQL Database. You’ll perform common tasks such as migrating, backing up and restoring a SQL Server database to an Azure database. As you progress, you’ll understand how you can reduce costs, and manage and scale multiple SQL databases using elastic pools. You’ll also implement a disaster recovery solution using standard and active geo-replication. Whether it is learning different techniques to monitor and tune an Azure SQL Database or improving performance using in-memory technology, this book will enable you to make the most out of Azure SQL database features and functionality for data management solutions. By the end of this book, you’ll be well-versed with key aspects of an Azure SQL Database instance, such as migration, backup restorations, performance optimization, high availability, and disaster recovery.
Table of Contents (11 chapters)

Vertical Scaling

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 Basic to Standard S0 or switching from Standard S0 to Standard S1.

Scaling down a service tier refers to switching to a lower service tier; for example, switching from Standard S1 to Standard S0, or switching from Standard S0 to Basic.

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 hours.

Service tiers can be changed on the fly with zero downtime. When a service tier change request is sent to Azure SQL Database, it first creates a copy of the database in the requested service tier and switches to the database in the new service tier once the copy is ready.

You are charged for the new service tier once the...