VMware published a new 12-pages precious paper describing how VirtualCenter performs when using a Microsoft SQL Server 2005 back-end database, and how it should be configured to achieve optimal performance.
The VirtualCenter database saves performance history for all the managed VMs, which is a pretty intensive I/O activity, so the test methodology measured how well SQL Server 2005 performs in a virtual environment with 100 VMs.
The results are interesting:
The paper also includes some guidelines for correctly sizing the database, making it a must-read.
Download it here.