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September 2010, Vol. 26

Application availability: Using the right tools

First, there’s the availability of the physical infrastructure, the physical servers, the network and storage layers. Second is anxiety and perceived risk of having five, 10 or 20 virtual machines (VMs) running on single servers or blades that depend on the availability of the physical infrastructure. And finally, there’s the anxiety surrounding the availability of the services that run within the guest operating system inside the VM. To some degree, this availability anxiety has always been present in our industry—with customers worried about what their contingencies might be if a server dies or if a service stubbornly refuses to start. These anxieties predate the adoption of virtualization within most businesses. It is really the adoption of virtualization in the last 10 years that has introduced an entirely new anxiety. Boosting consolidation ratios At the heart of virtualization efficiencies is the consolidation of servers, and now increasingly desktops, into a small number of physical hosts. The more VMs you can run on one ...

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