In my previous article, I measured SQL Server Basic Availability Groups (BAG) performance. This, as it comes from the name, addresses SQL Cluster Failover Cluster Instance (FCI) performance. I expect SQL Server FCI to exhibit two times higher performance than BAG. Before I start, I’d like to tell you one important thing about this measurement. SQL Server FCI database resides on a StarWind virtual device. Why did I choose StarWind? Because I got their NFR license some time ago and decided to give this software-defined storage solution a shot. Let’s just hope that it won’t limit SQL Server FCI performance.