A system administrator manages a two-node, active-passive database cluster. The primary node, Node-A, experienced a critical hardware failure, which triggered an automatic failover to the secondary node, Node-B. After replacing the faulty hardware in Node-A and verifying its operational stability, the administrator plans to return the database services to Node-A during the next maintenance window. Which of the following terms BEST describes this planned process of restoring services to the original primary node?
The correct answer is Failback. Failback is the process of restoring operations to a primary server or system after they were shifted to a secondary system during a failover event. In this scenario, the services are being moved back to the original primary node (Node-A) after it has been repaired, which is the definition of a failback.
Failover is the process of automatically or manually switching to a standby system when the primary system fails. The initial event in the scenario was a failover.
A heartbeat is a periodic signal sent between nodes in a cluster to monitor their health and availability; it is not a process for migrating services.
A switchover is typically a planned, manual role reversal between a primary and standby system, often for scheduled maintenance, not necessarily following an unexpected failure. While similar to failback, failback specifically refers to the restoration of service to the original primary node post-failure.