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

Disaster recovery

Disaster recovery (DR) refers to having business continuity during and after events that impact an Azure region, such as a natural disaster or hacking incident that terminates an entire Azure region.

DR for Azure SQL Database can be implemented through active geo-replication. An auto-failover group can be configured for Azure SQL Database and SQL Managed Instance as a business continuity solution. A failover group is designed to ease out the deployment and management of geo-replication databases at scale.

Active geo-replication

Active geo-replication uses Always On technology to asynchronously replicate data to a maximum of four readable secondaries in the same or any other Azure region. Active geo-replication is available across all performance tiers except Hyperscale. A typical active geo-replication environment is shown in Figure 9.17:

A typical active geo-replication environment

Figure 9.17: A typical active geo-replication environment

The DB 1 database is primarily...