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You're reading from Professional Azure SQL Database Administration

Product typeBook

Published inJul 2018

Reading LevelBeginner

PublisherPackt

ISBN-139781789538854

Edition1st Edition

Languages

SQL

Tools

Azure

Concepts

Database Administration

Author (1)

Ahmad Osama

Disaster Recovery

Disaster recovery refers to having business continuity in case of a natural disaster or hacking that terminates an entire Azure region.

There are two ways to implement disaster recovery: Standard Geo-replication and Active Geo-replication.

Standard Geo-Replication

Standard Geo-replication asynchronously replicates committed transactions from an online primary to an offline secondary in a predefined Azure region:

Figure 8.4: Standard Geo-Replication

In standard geo-replication:

Only one secondary is allowed in a DR paired region. Each region has a DR pair that can only host the secondary database. The list of DR paired regions is here: http://blogs.msdn.com/b/windowsazurestorage/archive/2013/12/11/introducing-read-access-geo-replicated-storage-ra-grs-for-windows-azure-storage.aspx.
The secondary database is offline and is unreadable. However, it is visible in the master database. The secondary database is readable when failover is done.
The secondary database is priced at...

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Professional Azure SQL Database Administration

Published in: Jul 2018Publisher: PacktISBN-13: 9781789538854

Author (1)

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.
Read more about Ahmad Osama

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You're reading from Professional Azure SQL Database Administration

Disaster Recovery

Standard Geo-Replication

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Author (1)

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