Public Clouds are attractive given the speed of virtual machine deployment and resource allocation, but Public Cloud capabilities are very limited as physical infrastructure is used by many customers. In contrast, Private Cloud is used by one client solely, and all the physical infrastructure is customized to suit its tasks, performance and data protection requirements. At the same time, from the technical viewpoint, both types of clouds are the same: they constitute a set of hardware resources (servers, storage systems) with a virtualization system. Private Cloud is suitable for situations when the public cloud does not meet infrastructure technical requirements (disk subsystem, the number of cores and RAM per virtual machine, the processor base frequency) or the company security policy. Moreover, in Private Cloud, it is possible to implement full access to administering the IT infrastructure at the hypervisor and hardware level, as well as buy back the hardware in the future. Thus, Private Cloud combines both dedicated servers’ performance and security and Public Cloud’s elasticity when the required amount of virtual resources can be allocated for specific workloads.