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VDI Design Guide—Dual VDI and AI on Dell 15G vSAN Ready Nodes in a Healthcare Environment
Introduction Solution Architecture Validation Sizing the Solution
Sizing and scaling
Overview
Sizing guidelines
Overview Platform configurations CPU Memory NVIDIA vGPU considerations Sizing considerations
Scaling guidelines
Overview Scaling out Scaling up
Summary References

Scaling guidelines

Home > Workload Solutions > Virtual Desktop Infrastructure > Design and Implementation Guides > VDI Design Guide—Dual VDI and AI on Dell 15G vSAN Ready Nodes in a Healthcare Environment > Scaling guidelines

Scaling guidelines

  • Scaling out

    Each component of the solution architecture scales independently, depending on the required number of supported users. You can add nodes at any time to expand the vSAN SDS pool in a modular fashion. The limits of vSAN at 64 nodes per block restricts the scaling limit for a vSphere cluster.
    Figure 12. VDI and AI workload orchestration

    VMware Horizon

    The limits of the hypervisor at 64 nodes per block restricts the scaling limit for vSAN.

    The boundary for a Horizon block is the vCenter. The number of VMs a vCenter can host depends on the type of Horizon 8 VMs being used. The recommended limit of virtual machines per vCenter is 20,000 full-clone or instant-clone VMs.

    Sizing recommendations change over time as updates are released and qualifications are performed. See the VMware Configuration Maximums website for the latest recommendations.

    This Dell Validated Design for VDI uses instant clones, as shown in the following figures.

    VMware recommends a limit of 5,000 instant-clone VMs per block. With these limits in mind, 20 compute nodes with 200 task-user VMs per node would reach the maximum number of VMs for the block.

    The following figure shows a 5,000-user Horizon block:
    Figure 13. 5,000-user Horizon block
    The following figure shows a scale-out to a 20,000-user Horizon vSAN pod with 5,000 user blocks. Each block contains its own vCenter Server instance and VDI components.
    Figure 14. 20,000-user Horizon vSAN pod with 5,000 user blocks
    Note: The management cluster sizing in the preceding diagrams are recommended minimums, and sizing must be carefully considered as part of any deployment.