Azure SQL Database Networking

Have you realised the changes Microsoft have made to the firewall and networking section of Azure SQL Database? I found this quite stealthy and took me by surprise. I did encounter an edge case scenario where it lead to issues once I made some tweaks but that was a rare thing.

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Azure SQL Database – Error Logs?

Ok, so Azure SQL doesn’t really have its own error log based somewhere on a machine within \\MSSQL\Log directory but the closest thing you will get is a system catalog view called sys.event_log which is very useful. It will get you information about all sort of event types such as:

  • Successful connections
  • Failed connections
  • Throttling issues
  • Blocked by firewall attempts
  • Connection termination

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Azure SQL Database and Error Handling

For some reason I have friends / colleagues telling me that when scaling (up and down for this example) that no downtime occurs. Well, not only does Microsoft documentation say differently, I will show it. So let’s test it out. Before the practical test, this is the official stance. “There is a switch over period where connectivity is lost to the database for a short amount of time, which can be mitigated using retry logic”.

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Azure Advisor – for Azure Data Platform

Wouldn’t it be nice if we could access one main dashboard / report that pulls in information from many tools such as security centre, SQL advisor and cost management tools? Well you can, thus giving you a focal point to implement best practices, called Azure Advisor. This is not specifically for Azure SQL Database, you can leverage this for most resources within Azure.  Later in this blog post you see that I will use it as a focal point for my database infrastructure in Azure.

In the Azure portal under services look for “advisor”

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