Write and Read operations connection string

Neela 20

I have an Azure SQL DB in two regions (replicated to secondary region) and using it in ASP.NET MVC web app hosted in the same regions. My Question is do I need to use two connection strings in my secondary region web app for handling Read and Write operations (One for Read and one for write). If so do I need to separate my code for read and write operations.

hema 0 Reputation points

2024-08-23T06:44:41.3633333+00:00
Hi @Neelayou will need to use two connection strings in your secondary region web app to handle read and write operations effectively. Here’s why and how you can manage it.

For Read Operations you need to direct read operations to the read-only replica, ensuring that your primary database isn’t overloaded with read requests.

For Write Operations you need to ensure that all write operations are directed to the primary database, maintaining data consistency and integrity.

You will need to separate your code for read and write operations to use the appropriate connection strings. Here’s a basic example for that

// Write operation

using (SqlConnection conn = new SqlConnection(writeConnectionString))

{

conn.Open(); // Perform write operations

}

// Read operation

using (SqlConnection conn = new SqlConnection(readConnectionString))

{

conn.Open(); // Perform read operations

}
Sai Raghunadh M 75 Reputation points Microsoft Vendor

2024-08-30T07:57:52.4133333+00:00
Hi @ Neela,

Thanks for the question and using MS Q&A platform.

If you have configured the database to allow both read and write operations in the secondary region, you can use the same connection string for both read and write operations, regardless of which region the web app is hosted in.

However, if you have configured the database to allow only read operations in the secondary region, you will need to use a separate connection string for write operations. In this case, you will need to modify your code to use the appropriate connection string for read and write operations.

It is important to note that even if you are using the same connection string for read and write operations, you may still need to modify your code to handle failover scenarios. When a failover occurs, the secondary region becomes the primary region, and any write operations must be directed to the new primary region.

If this suggestion helps, please do upvote and if you have any further queries, please let us know.
Sai Raghunadh M 75 Reputation points Microsoft Vendor

2024-09-03T06:39:02.82+00:00

Hi @Neela ,

We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.
Sai Raghunadh M 75 Reputation points Microsoft Vendor

2024-09-04T08:34:13.5366667+00:00

Hi @Neela ,

We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.

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