Perform post migration validations

1. Connectivity Validation:

One of the first things you should validate is the connectivity to your Azure SQL solutions. Ensure that your applications, services, and users can connect to the migrated databases. You can perform this validation by attempting to establish a connection using the connection string and credentials. Here’s an example of how you can test the connectivity using C# code:

using System;
using System.Data.SqlClient;

try
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
Console.WriteLine("Connection successful!");
}
}
catch (Exception ex)
{
Console.WriteLine("Connection failed: " + ex.Message);
}
}
}

2. Data Consistency Validation:

Once you’ve confirmed the connectivity, it’s important to validate the data consistency after migration. Compare a subset of data between the source and target databases to ensure that they match. You can select specific records from tables and compare the values column by column. Here’s an example of how you can compare data using a simple SQL query:

USE your_database_name;

-- Compare data in specific columns
SELECT column1, column2 FROM source_table
EXCEPT
SELECT column1, column2 FROM target_table;

3. Functional Validation:

After ensuring data consistency, validate that your application functions correctly with the migrated Azure SQL solution. Execute critical transactions, run sample queries, and perform common operations to verify that all functionalities are working as expected.

4. Performance Testing:

Test the performance of your migrated Azure SQL solution by executing queries and operations under expected production workloads. Monitor the performance metrics such as CPU utilization, query execution time, and database DTU (Database Transaction Units) consumption. Identify any bottlenecks, optimize queries or indexes as required, and fine-tune the performance to meet your application requirements.

5. Security Validation:

Confirm that the security measures implemented on your source databases are effectively replicated in the migrated Azure SQL solution. Validate that user accounts, roles, permissions, and firewall rules are correctly configured. Attempt unauthorized access using invalid credentials to verify that the security measures are functioning as intended.

6. Backup and Restore Validation:

Ensure that your backup and restore processes are working correctly with the migrated Azure SQL solution. Perform a backup and restore operation to verify the process and validate the integrity of the restored data. You can use SQL Server Management Studio (SSMS) or Azure PowerShell cmdlets to perform backup and restore operations.

By performing these post-migration validations for your Azure SQL solutions, you can minimize the risk of issues impacting your production environment. Regularly schedule these validations to ensure ongoing operational efficiency. Remember to refer to the official Microsoft Azure SQL documentation for detailed information on individual validation techniques and best practices.

With meticulous testing and validation, you can confidently ensure the successful migration and consistent performance of your Azure SQL solutions.