VMware vSphere Fault Tolerance

VMware vSphere Fault Tolerance (FT) provides continuous availability for applications in the event of server failures by creating a live shadow instance of a virtual machine that is always up-to-date with the primary virtual machine. In the event of a hardware outage, vSphere FT automatically triggers failover—ensuring zero downtime and preventing data loss.
After failover, vSphere FT automatically creates a new, secondary virtual machine to deliver continuous protection for the application.

Step 1: Prepare VM

CD-ROM should attached to client device and device mood in to pass through CDROM

Manage HA Slot Size and Strict Admission Control

Manage HA Slot Size

Step 1: Set Admission control policy as define failover capacity by static number of hosts