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Active Geo-Replication for Azure SQL Database




By Eric Rouach, DBA & Data Engineer at Madeira Data Solutions

July 2023


With Active Geo-Replication, you can create a read-only secondary replica of any Azure SQL Database with just a few simple steps. This way, you may re-direct any "heavy-reader" or analytical workload and free-up your Azure resources to the benefit of your application.


Pre-requisites:

-An existing Azure SQL Database.

-A dedicated Azure SQL (logical) Server to which the read-only secondary replica will connect.


From SSMS, follow the below steps:


1. Run the following script on the “master” database in the primary (source) server:

CREATE LOGIN geodrsetup WITH PASSWORD = 'StrongPassword!@#';

CREATE USER geodrsetup FOR LOGIN geodrsetup;

ALTER ROLE dbmanager ADD MEMBER geodrsetup;


SELECT sid FROM sys.sql_logins WHERE [name] = 'geodrsetup';


2. Take note of the SID of the new login returned from the script above.

Copy it to the script below, and run it on the “master” database in the secondary (target) server:

CREATE LOGIN geodrsetup WITH PASSWORD = 'StrongPassword!', SID = 0x123456789123456789;

CREATE USER geodrsetup FOR LOGIN geodrsetup;

ALTER ROLE dbmanager ADD MEMBER geodrsetup;


3. Run the following script on the user database in the primary (source) server:

CREATE USER geodrsetup FOR LOGIN geodrsetup;

ALTER ROLE db_owner ADD MEMBER geodrsetup;


4. Connect as “geodrsetup” to the “master” database in the primary (source) server,

and run the script below after replacing the user database name and secondary server name:

ALTER DATABASE [YourDatabase] ADD SECONDARY ON SERVER [secondaryserver.database.windows.net];


5. Run the query below to track the progress of the replication:

SELECT * FROM sys.dm_operation_status;


6. Once the progress has reached the "COMPLETED" status, you're done!

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