VietMX Staff asked 3 years ago
Fail over means switching to another machine when one of the machine fails. Fail over is a important technique in achieving high availability. Typically a load balancer is configured to fail over to another machine when the main machine fails.
To achieve least down time, most load balancer support a feature of heart beat check. This ensures that target machine is responding. As soon as a hear beat signal fails, load balancer stops sending request to that machine and redirects to other machines or cluster.
