In this chapter, we described some specific availability (and resiliency) solutions in vSphere, including the new vSphere HA features, Proactive HA, and the vCenter Server HA.
Building a reliable infrastructure is the first (crucial) part, but then also the workloads must have a reasonable availability level, according to business needs and requirements.
VMware vSphere HA can provide a basic and convenient availability level for all workloads, with minimum effort and cost. However, it's not suitable for business-critical workloads. In this case, other solutions can be used, such as vSphere FT or also traditional (from the physical world) solutions, such as guest clustering.
The next chapter will describe how to successfully back up your VMware environment.