Virtualizing x86 infrastructure isn't just a one-step process -- as servers change, the whole data center must change as well. While server hypervisors such as VMware's ESX, Microsoft's Hyper-V and Xen can make IT more efficient and cost-effective, many of the virtualization advantages can be canceled out when data centers rely on technology and processes that haven't been updated for the virtualization age.
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Either because server disks are full or because virtualization is a natural growth path, organizations large and small are moving toward shared storage. For large enterprises, high-capacity storage-area networks make sense, but what about small or mid-sized enterprises new to shared storage?
IBM's new mainframe is on display at this week's SHARE conference in Boston, a testament to the relevancy of the big iron in today's enterprise IT environments. Amid the excitement over IBM's mainframe makeover, however, IT pros are concerned about the availability of skilled professionals who know how to run it.