Microsoft Exchange Server 2010 Performance on vSphere 5

A white paper has been published that examines how 2010 performs on 5 in terms of scaling up (adding more virtual CPUs) and scaling out (adding more VMs). Having the choice to scale up or out while maintaining a positive user experience gives IT more flexibility to right-size system deployments and maximize total cost of ownership with respect to licensing and hardware purchases.

Testing shows the effectiveness of 5 to add compute power by scaling up VMs, in increments, from to 12 virtual CPUs. This allowed the total number of very heavy users to increase from 2,000 to 12,000 while sendmail latency remained well within the range of acceptable user responsiveness. Processor utilization remained low, at about 15% of the total host processing capacity for 12,000 very heavy Exchange users.

Testing also shows that scaling out to eight VMs supports a workload of up to 16,000 very heavy users, with the load consuming only 32% of the host processing capacity.

Additional tests were undertaken to show the performance improvements of vMotion and Storage vMotion in 5. vMotion time for a 4-vCPU mailbox server showed a 34% reduction in 5 over vSphere 4.1. Storage vMotion migration time for a 350GB database showed an 11% reduction in 5 over vSphere 4.1.

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For the full paper, see Microsoft Exchange Server 2010 Performance on vSphere 5.

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