The term virtualization applies to technologies created to provide an instantiation between computer hardware systems and the software that supports its activities. Virtualization refers to establishing a virtual resource, such as a server, desktop, operating system, file, storage, or network. The fundamental intent of virtualization involves managing workloads by radically transforming traditional computation to make it more scalable.
It is significant to emphasize that virtualization means designing a virtual product, such as a data server or operating system. Virtualization is required to create software that assists in maintaining a virtual system. At the same time, virtuality is only a representation with minor changes to the real product.
One type of virtualization is the database; it is an organized structure intended to store, modify, and process-related information, mainly in large volumes. In the context of databases, one should also consider the notion of a database management system. This system is a software package required to create a new database structure its content, edit the content, and display the data.
Virtualization reduces the number of servers through consolidation, which was previously required by more than one server. It is now possible to install a single server and start as many guest operating systems as needed in a virtualized environment. It also provides the full power of a physical machine, distributing its capabilities across many users or domains.
IaaS, PaaS, and SaaS are models of cloud services provided for rent; the difference between them is at the level of problems to be solved. Under the IaaS model, the customer calculates the computing power of the cloud; software solutions are built on this basis. This is the PaaS type of model, providing cloud resources and a collection of preinstalled tools. The SaaS user receives a pre-built solution, which remains only to be applied.