WHAT IS VIRTUALIZATION
Virtualization is the consolidation of operating systems present on several physical servers into one physical server.
The system consolidation provides significant financial advantages. Present X86 systems in many cases have an average percentage of available resources usability (processors, working memory and data storage systems) at the level of 10-15%, which says a lot about how underused users’ current resources are.
Apart from that, the usual conception of server systems is one server – one application. In practice that means: how many different applications a company uses, at least that many servers it has. Server consolidation makes a significant improvement in exactly this part of the system.
Quality consolidation brings an increase of available resources usability of about 50-85%. When we transpose that into real systems, virtualization really reduces the number of necessary servers in the system by at least 3 to 5 times.
ADVANTAGES OF SERVER VIRTUALIZATION
Infrastructure as a Service – IaaS
Platform as a Service – PaaS
Software as a Service – SaaS