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Chapter 5. Designing a Virtual Infrastru... > Conducting a Virtualization Assessme...

5.3. Conducting a Virtualization Assessment

There are several phases in a comprehensive virtualization assessment. First, you must inventory the hardware and software components of a system. The second phase involves analyzing application resource utilization for the target physical servers over the course of several weeks. During the final phase of the assessment, the resource utilization of the virtualization candidates is analyzed to determine the aggregate CPU, memory, network, and disk I/O requirements. This enables proper sizing of the target VMware Infrastructure.

Manually gathering inventory data from a large number of servers can be time-consuming and difficult. Some tools that can be used to help with assessments include VMware Capacity Planner, IBM CDAT, Microsoft Msginfo32, Microsoft Srvinfo, the UNIX System Activity Reporter (SAR) tool, and Platespin PowerRecon. These tools provide support for one or more operating systems. VMware Capacity Planner is used during a VMware Virtualization Assessment to gather an inventory and performance metrics. The typical data collection requires 30 days to account for any workload variance in the month. Afterwards, optimization scenarios are run against the target hardware platform to produce consolidation ratios.


  

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