VMware and Microsoft Core Tax

What's Core Tax? Microsoft generally license per server or per processor. In this case of Windows Server: -Windows Server 2008 Standard is licensed per physical server and supports up to 4 physical processors whether there are 1, 2, 4, 6 or 8+ cores per processor -Windows Server 2008 Enterprise Edition is licensed per physical server up to 8 […]

What's Core Tax? Microsoft generally license per server or per processor. In this case of Windows Server: -Windows Server 2008 Standard is licensed per physical server and supports up to 4 physical processors whether there are 1, 2, 4, 6 or 8+ cores per processor -Windows Server 2008 Enterprise Edition is licensed per physical server up to 8 physical processors whether there are 1, 2, 4, 6 or 8+ cores per processor -Windows Server 2008 Datacenter Edition is licensed per processor whether there are 1, 2, 4, 6 or 8+ cores per processor

Where as, With VSphere, VMware only supports 6 cores per processor for most of their versions. If you want support for more than 6 cores per processor you have to upgrade from: Standard ($795 per processor) to Advanced ($2245 per processor) a 282% increase (no, that's not a typo) OR Enterprise ($2875 per processor) to Enterprise Plus ($3495 per processor) a 22% increase

Source:→ TechNet Blog