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Professional Azure SQL Managed Database Administration - Third Edition

You're reading from Professional Azure SQL Managed Database Administration - Third Edition

Product type Book

Published in Mar 2021

Publisher Packt

ISBN-13 9781801076524

Pages 724 pages

Edition 3rd Edition

Languages

Concepts

Authors (2):

Ahmad Osama

Shashikant Shakya

View More author details

Table of Contents (14) Chapters

Preface

1. Introduction to Azure SQL managed databases

2. Service tiers

3. Migration

4. Backups

5. Restoration

6. Security

7. Scalability

8. Elastic and instance pools

9. High availability and disaster recovery

10. Monitoring and tuning

11. Database features

12. App modernization

Index

Accelerated database recovery (ADR)

Accelerated database recovery, or ADR, is a new database recovery process that greatly increases availability and decreases database recovery time in scenarios such as crash recovery (database recovery in the event of a server/database crash) and long-running transaction rollback (for example, a large bulk insert or an index rebuild rollback).

An SQL database consists of data and a transaction log file. A data file contains the table data. A transaction log file keeps track of all the changes made to the data and the schema; for example, if there is an insert in a table, the transaction log file contains the insert statement and whether the insert statement was committed or not.

The standard database recovery process

To better understand ADR, let's first get an understanding of the standard database recovery process:

The standard database recovery process without ADR

Figure 9.7: The recovery phase without ADR

Note

Image taken from https://docs.microsoft...

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Authors (2)

Ahmad Osama

Ahmad Osama works for Pitney Bowes Pvt. Ltd. as a technical architect and is a former Microsoft Data Platform MVP. In his day job, he works on developing and maintaining high performant, on-premises and cloud SQL Server OLTP environments as well as deployment and automating tasks using PowerShell. When not working, Ahmad blogs at DataPlatformLabs and can be found glued to his Xbox.

See other products by Ahmad Osama

Shashikant Shakya

Shashikant Shakya is a passionate technologist with decades of experience in the sphere of databases. He works for Microsoft as a senior support engineer. In his day job, he works on Azure SQL Database, Azure Database for MySQL, and PostgreSQL. Apart from his work, he is a regular speaker at the SQLBangalore community group.

See other products by Shashikant Shakya

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