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Deploy maximum number of virtualized environments on the same host.
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Deploy the virtualized environment on the same cluster if the cluster goes beyond the host boundary.
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Segment redundant elements on a different cluster, or ensure that the redundant elements are not on the same host.
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Plan for rainy day scenarios or conditions. Do not configure resources only for traffic or performance on an average day.
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Do not oversubscribe resources. Oversubscribing affects performance.
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Monitor the server, host, and virtualized environment performance.