What is the maximum number of hosts supported in a vSphere cluster?

In vSphere 6, the architecture allows for a maximum of 64 hosts in a single cluster. This design enables organizations to create large, efficient clusters while managing resources effectively. By supporting up to 64 hosts, vSphere ensures that clusters can be scaled up to accommodate varying workloads and provide redundancy and failover capabilities, which are essential for maintaining high availability in virtualized environments.

The limit of 64 hosts is strategically defined to balance performance, management complexity, and resource allocation. Clusters larger than this would likely lead to increased management overhead and could complicate the operational processes. Therefore, while larger numbers may seem appealing, the architecture primarily supports operational efficiency and scalability within the defined limits, making 64 the optimal choice.