In past corps used to have very high-end physical computers running only a small subset
of an application and wasting all the remaining resources for nothing. Applications
were not designed or tuned to be consolidated on one physical box. Later the concept
of hosting multiple operating systems on one physical machine introduced and that
is what called “Virtualization”.
Efforts of being green IT does not end here only, instead we have a target to migrate almost all physical workloads to virtualize infrastructure. This in fact will dramatically reduce the carbon emission and subsequently will shrink the energy bills.