VMware vSphere High Availability
VMware vSphere High Availability (HA) is a feature within the vSphere platform that provides automated failover for virtual machines (VMs) running on ESXi hosts in a cluster. It monitors host and VM health, and if a host fails or becomes unreachable, it automatically restarts the affected VMs on other available hosts in the cluster. This ensures minimal downtime and maintains service availability without requiring manual intervention.
Developers and IT professionals should use vSphere HA in production environments where high availability is critical, such as for business-critical applications, databases, or web servers. It is essential for reducing downtime during hardware failures, planned maintenance, or network issues, and is commonly deployed in data centers, cloud infrastructures, and virtualized environments to meet service-level agreements (SLAs).