What exactly are the server OS requirements for Server 2008 R2 clustering?
From my reading it seems that I can cluster either Server 2008 Enterprise or Data Centre but not Standard or Web. Yet it seems that 2008 HyperV server - the freeware product - can support clustering.
As well, if I do have to have Enterprise, which I believe allows for up to 4 guest sessions in the license, does that mean that I have to create 2008 Enterprise VM's?
Can 2008 Standard R2 not be clustered either physically or virtually in any way within a Microsoft only environment?