John Dix makes a good point - over virtualization could cause a bit of a hangover.
Virtualization technology essentially reshaped IT in the last decade, but we drank so deep and long at the fountain that we enter the new decade with something of a hangover, and lots of fuzzy questions about what we have wrought.
Yes, virtualization has paid huge dividends in data center/server consolidation efforts, and yes it is helping redress the fact that our corporate systems are woefully underutilized. It's just that the list of issues surrounding virtualization is growing as fast as new applications crop up for this wonderful elixir.
These issues were easier to ignore when we were giddily realizing 10:1 server consolidation ratios and driving utilization rates from below 20% to 50% or more, but it is time to holistically assess where we are today.
John is absolutely right; the next round of virtualization must be smart and targeted to the needs of the IT of each organization. In the past, data center under-utilization offered huge gains with simple additions of virtual machines. However, with proper architecture, virtualization can still bring substantial ROI to IT budgets. It just has to be planned correctly up front.
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