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February 2010, Vol. 19

Monitoring and optimizing host server performance

When server virtualization first became popular among IT professionals, virtualization technology was marketed as a way to decrease costs by making better use of existing server hardware. The idea was that many servers only used 10% to 20% of their available resources, so it made sense to combine those servers onto a single box rather than purchasing dedicated hardware for each server. More on virtualization performance: Virtualization performance and server resource management guide Virtual machine monitoring and security guide Virtual machine host monitoring improves VM performance But server virtualization has undergone a fundamental shift in recent years. Today, virtualization seems to be more about achieving flexibility and resiliency within data centers. Rather than virtualizing only servers with low overhead, some organizations have begun virtualizing entire data centers. Doing that allows organizations to treat the host servers as a pool of resources that can be allocated on an as-needed basis. Although this approach ...

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