The actual machine where Virtualization takes place is called as Host machine. All those guest operating systems which are virtualized onto the host are assigned with the name of virtual machines.
The hypervisor is an additional layer between physical and virtual spheres; it manages the system’s hardware resources so they are distributed efficiently among virtual machines (VMs).
Major Benefits of Server Virtualization
Generates less heat : If the servers are consolidated and virtualized, then the amount of carbon footprint can be reduced significantly.It is a known fact that heat generation is proportional to the number of servers and to tackle the heat, the company needs to deploy more number of cooling solutions,this leads to more consumption of power than usual.
Easy Management: By reducing the number of servers, usually less staff is required to maintain and manage them. Server Virtualization does the same as it consolidates the server count and reduces it to one. So, as a result less number of staff needs to be employed and so fewer bodies working equals less energy exertion, this will directly reflect on lessening of carbon footprint.
Less power consumption-a green initiative : If a company bounds to reduced number of servers by virtualization, then the power consumption factor will also get reduced. As a result, less amounts of energy is consumed to run a business operation and in this way, a green initiative can be carried out.
Generation of Obsolete hardware gets reduced: – Server virtualization technology, offers multiple servers on a common hardware platform and so as a result of it, hardware utility increases and the presence of more hardware tools decreases.
Increase Up-time: Though the vendor feature names may be different, they usually offer capabilities such as live migration, storage migration, fault tolerance, high availability, and distributed resource scheduling which will increase the server infrastructure up-time.
Improve DR: By removing the dependency on a particular hardware vendor or server model, a disaster recovery site no longer needs to keep identical hardware on hand to match the production environment, and IT can save money by buying cheaper hardware in the DR site since it rarely gets used. By consolidating servers down to fewer physical machines in production, an organization can more easily create an affordable replication site. Also most enterprise server virtualization platforms have software that can help automate the fail-over when a disaster does strike. The same software usually provides a way to test a disaster recovery fail-over as well.
Negotiating with Hardware vendor’s: server virtualization abstracts away the underlying hardware and replaces it with virtual hardware, data center managers and owners gain a lot more flexibility when it comes to the server equipment they can choose from. This can also be a handy negotiating tool with the hardware vendors when the time comes to renew or purchase more equipment.