Server virtualization has long promised unprecedented economic savings for IT; and, to be fair, there are some area where server virtualization has saved IT some money. However, the alluring promise of “huge” savings has never been realized. Why is that?

Virtualization’s promise has always revolved around better utilization of computing resources:

Lowers hardware costImproves operational expense in deploying / updating servers or instancesReduces floor space requirements while cutting power and cooling requirements

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