vSphere Fault Tolerance safeguards any virtual machine (with up to four virtual CPUs), including homegrown and custom applications that traditional high-availability products cannot protect. Key capabilities include the following:
vSphere FT can safeguard any number of virtual machines in a cluster because it leverages existing vSphere HA clusters. Administrators can start or stop vSphere FT for specific virtual machines with a point-and-click action in the vSphere web client. Use vSphere FT for applications that require continuous protection during critical times, such as quarter-end processing.