As virtualization stretches deeper into the enterprise to include mission-critical and resource-intensive applications, IT executives are learning that double-digit physical-to-virtual server ratios are things of the past.

Virtualization vendors may still be touting the potential of putting 20, 50, or even 100 VMs (virtual machines) on a single physical machine, but IT managers and industry experts say those ratios are dangerous in production environments, causing performance problems or, worse, outages.

By Sandra Gittlen, Computerworld

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