As the SDDC grows, additional compute-only clusters can be configured. Tenant workloads run on the ESXi hosts in the compute cluster instances. Multiple compute clusters are managed by the Compute vCenter Server instance. The design determines host-to-rack relationship and vSphere HA settings for the compute cluster.

Table 1. Compute Cluster Design Decisions

Decision ID

Design Decision

Design Justification

Design Implication

SDDC-VI-VC-025

Configure vSphere HA to use percentage-based failover capacity to ensure n+1 availability.

Using explicit host failover limits the total available resources in a cluster.

The resources of one host in the cluster is reserved which can cause provisioning to fail if resources are exhausted.