Since typical workloads call for multiples of 2 in vCPU and RAM (1,024 MB), this works out particularly well when the compute hardware is sized based on the most common flavor of an organization. Unfortunately, many organizations buy hardware first, then create OpenStack clouds; others reuse hardware from existing environments. By designing compute server hardware configurations around workloads, maximum efficiency can be gained.
For example, an average flavor in an organization could be a 2 vCPU with 4,096 MB of RAM. Doubling of this common flavor would result in a 4 vCPU flavor with 8,192 MB of RAM. The smallest flavor would then be calculated at half of the middle flavor (one-fourth of ...
