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

Automatic backups

Microsoft provides automated backups for Azure SQL Database and Azure SQL Managed Instance databases. Automatic backups consist of full, differential, and log backups. The first automatic full backup is performed immediately after the database is provisioned. Differential backups are scheduled to occur every 12-24 hours, and transaction log backups are scheduled for every 5-10 minutes. The frequency of transaction log backups is based on the compute size and the amount of database activity. A full backup is scheduled for once a week:

Automatic backup cycle

Figure 4.1: Automatic backups

Note

Differential and transaction log backups can run in parallel.

Backup storage

Azure SQL Database and SQL Managed Instance keep database backups in geo-redundant storage blobs by default, which are replicated to a paired region. This helps to recover the database in a different region if there is a regional outage in the primary region. You can choose between locally...