Implementing vSphere High Availability
You've already seen how you can use OS clustering to provide high availability for OSs and applications. vSphere provides a feature intended to provide high availability at the virtualization layer, vSphere Availability, a component that provides for automatic failover of VMs. Because the term high availability can mean different things to different people, VMware renamed the previously named “vSphere High Availability” and “vSphere Availability Clusters” to just “vSphere Availability.” However, since “vSphere HA” is the more widely used term throughout the VMware ecosystem and within the vSphere Web Client UI, that's the name we'll use throughout this book.
It's important to understand the behavior of vSphere HA to ensure you are using the right availability mechanism to meet the requirements of your organization. Depending on your requirements, one of the other availability...
