Vmware Fault Tolerance
-Fault Tolerance (FT) provides continuous availability to virtual machines, eliminating downtime and disruption—even in the event of a complete host failure.
-vSphere FT enables a virtual machine to survive a physical server failure by creating an exact replica virtual machine on another host that can take over at the time of failure.
-It is completely seamless, that means there is zero downtime, zero data loss, zero connection loss, continuous service availability, and complete transaction integrity.
-vSphere FT works by continuously replicating an entire running virtual machine from one physical server to another, the result is that an FT -protected virtual machine has two replicas: the primary virtual machine and the secondary virtual machine, each running on different ESXi hosts.
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