I have an 8-core (2 physical CPUs) host that is running the free ESXi hypervisor. I need to upgrade this to at least Essentials to enable my backup software to work. I can't figure out from their website what I need to purchase though. It appears the "Essentials Kit" allows for a total of 6 CPUs (3 physical servers, 2 CPUs each). Is that physical CPUs, or Cores?
Also, do I need to to upgrade ESXi to 6.5 before applying the license? Or can that be done later?
Thanks
John