The vCPU-to-core ratio is calculated based on the number of vCPUs allocated and the number of physical CPU cores available. For example, if two vCPUs are allocated to each virtual machine, the following applies:
2 vCPUs allocated to each virtual machine x 20 virtual machines = 40 vCPUs
In a design with 40 vCPUs that requires a 4:1 vCPU-to-core ratio, a minimum of 10 physical cores would be required.
If dual 8-core processors are used, the vCPU-to-core ratio can be calculated as follows:
2 x 8 Cores = 16 Total Cores
40 vCPUs and Physical 16 Cores = 2.5 vCPUs to each physical core, or a 2.5:1 vCPU-to-core Ratio