At VMworld in August 2013, VMware said that there are three basic phases of virtualization, namely:
- Basic Virtual Machines (VMs), where test and development, and non-production critical VMs are virtualized. Most companies today have at least gotten to this stage (most reliable accounts put this in the 60 percent to 80 percent range today).
- Mission critical VMs, where the critical servers that the company runs (such as SQL, Exchange, Oracle, and SAP), are virtualized. According to VMware’s research, about 54 percent of companies are in this stage today. They also noted that half of all Oracle and SAP servers and three-quarters of Microsoft servers in this category are virtualized today.
- IT-as-a-Service (IaaS), the phase where we use cloud computing (private, public, or a hybrid of the two). IT provides the resources and controls, but the VMs may be anywhere. Again, according to VMware, 21 percent of companies are in this stage today.
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