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VDI Design Guide—Citrix Virtual Apps and Desktops on Dell vSAN Ready Nodes with 3rd Gen AMD EPYC Processors
Executive summary Solution architecture Key components Performance testing Design guidance
Design guidance
Platform configurations
CPU
Memory
NVIDIA vGPU considerations
Sizing considerations
Display protocol
Recommended BIOS settings
Design assessment
Conclusion References Appendix A: Definition of performance metrics

CPU

Home > Workload Solutions > Virtual Desktop Infrastructure > Design and Implementation Guides > VDI Design Guide—Citrix Virtual Apps and Desktops on Dell vSAN Ready Nodes with 3rd Gen AMD EPYC Processors > CPU

CPU

  • User density and graphics considerations:

    • Dell Technologies VDI Solutions validation test results suggest that you can use CPU oversubscription to effectively size VDI user density. To use a CPU configuration other than those that have been validated, consider the following guidance to achieve comparable results for architectures with 3rd Generation AMD EPYC processors:
      • Knowledge workers—4.8 users per core. For example, 76 knowledge users with dual eight-core processors

    • AMD and Intel CPUs are not vMotion compatible within the same VMware vSphere Cluster. If using a mixed CPU vendor environment, ensure that CPUs from the same vendor are in the same cluster. For more information, see VMware EVC and CPU Compatibility FAQ (1005764).

    • For graphics configurations, consider the following information:
      • For high-end graphics configurations with NVIDIA RTX vWS graphics enabled, consider choosing higher clock speeds over higher core counts. Many applications that benefit from high-end graphics are engineered with single-threaded CPU components. Higher clock speeds benefit users more in these workloads.
      • For NVIDIA vPC configurations, consider higher core counts over faster clock speeds to reduce oversubscription.
      • Most graphics configurations do not experience high CPU oversubscription because vGPU resources are likely to be the resource constraint in the appliance.

    • VMware has released and updated its per-CPU licensing model, which requires a license on a per-CPU basis for up to 32 physical cores. Dell Technologies recommends customers who are using vSAN for VDI-only environments to use 'vSAN for Desktop' licensing, which is sold in packs of 10 and 100 licenses and is licensed on a per-VM basis. For those customers who wish to use per-CPU vSphere licensing, please see the Update to VMware’s per-CPU Pricing Model for additional information.