In vCenter, a cluster is a group of hosts and their associated virtual machines (VMs) that are managed together as a single entity. Clusters allow for the efficient management of resources, such as CPU, memory, and storage, as well as the ability to migrate VMs between hosts without interrupting service. Clusters also provide automatic sharing of resources and load balancing, ensuring that workloads are evenly distributed across the hosts. Overall, clusters help to provide high availability and scalability to the virtual infrastructure.
