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Another reason one would design for multiple virtualization clusters besides environment
size would be for different workloads. There are different workloads within the VDI
clusters. If there is a significant amount of 1 vCPU and 2 vCPU virtual desktops, one should
design a separate cluster for each. Figure 7 illustrates a multi-cluster design approach.
This enables one to manage the CPU ratio differently in each cluster, allowing for an easier
to manage design. If one was to blend the different CPU configurations, there would be a
new blended ratio that would need to be calculated and that just confuses things.
Figure 7:
Management and Desktop clusters
The use of GPUs can be another reason to consider a dedicated cluster for GPU
users. You can mix GPU and non-GPU users in the same cluster, but this can make
the operations and scheduling of these users a little more complex. If you have
enough GPU users to meet the minimum requirements for a small cluster then it's
usually worth doing so.
Management 1 vCPU VM 2 vCPU VM
Management cluster
Provides resources to all
non-desktopworkloads
in the design.
Desktop clusters
Discrete clusters allow for
management of di•erent CPU
configurations for virtual desktops.
