There are probably a lot of SharePoint Farms that use a Microsoft SQL cluster. Even now with new possibilities like Always-On for SQL 2012. But not only if you use SharePoint might this be of interest for you.
About a year ago, a customer of mine had some very bad performance with his SQL Server. The SQL was version 2008 R2 using the Windows Cluster Service hosted on a VMWare ESX 5.0 private cloud. Nothing unusual and of course the first thoughts were pointing to the VMWare servers. But let’s take a look at the performance test we performed on the cluster.
