hi, just like to know if it is possible to cluster 2 or more free hypervisor: I am looking for a free 3 or more hypervisor software, that can be clustered, and run windows and linux VM's. 1. Can i cluster 2 or more free Hyper-V 2012 R2 server with just hyper-v manager ? I am not using any of the System Center products. 2. Can i do the same with the free vSphere esxi 5.5.0 U2, without using vCenter ? 3. What about the others ? Redhat, xen, ext.... Thank you.