The cluster workload design defines the vSphere clusters, cluster size and high-availability configuration, and the workloads that they handle.
Table 1. Design Decisions on vSphere Clusters

Decision ID

Design Decision

Design Justification

Design Implication

SDDC-VI-VC-012

Create a single management cluster per region. This cluster contains all management ESXi hosts.

Creating a single management cluster simplifies configuration by isolating management workloads from tenant workloads.

Ensures that tenant workloads have no impact on the management stack.

You can add ESXi hosts to the cluster as needed.

Management of multiple clusters and vCenter Server instances increases operational overhead.

SDDC-VI-VC-013

Create a shared edge and compute cluster per region. This cluster hosts tenant workloads, NSX Controllers and associated NSX Edge gateway devices used for tenant workloads.

Creating a shared cluster for tenant edge devices and tenant virtual machines simplifies configuration and minimizes the number of ESXi hosts required for initial deployment.

The management stack also has no impact on compute workloads.

You can add ESXi hosts to the cluster as needed.

Management of multiple clusters and vCenter Server instances increases operational overhead.

Because of the shared nature of the cluster, when you add tenant workloads, the cluster must be scaled out to keep high level of network performance.

Due to the shared nature of the cluster, resource pools are required to provide all required resources to edge components .