You can enable VMware Fault Tolerance for your virtual machines to ensure business continuity with higher levels of availability and data protection than is offered by VMware HA.

Fault Tolerance is built on the ESX/ESXi host platform (using the VMware vLockstep technology), and it provides continuous availability by having identical virtual machines run in virtual lockstep on separate hosts.

To obtain the optimal results from Fault Tolerance you should be familiar with how it works, how to enable it for your cluster and virtual machines, the best practices for its usage, and troubleshooting tips.