How does Raft handle failures?

Can you explain how the Raft consensus algorithm deals with failures?

Sure! Raft handles failures by electing a new leader if the current leader fails, ensuring continued operation.

What happens if a follower node goes down?

If a follower node goes down, the leader will continue to replicate logs to the remaining followers. Once the downed node recovers, it will catch up with the leader's log.

How does Raft ensure data consistency during failures?

Raft ensures data consistency by requiring a majority of nodes to agree on log entries before they are committed, preventing split-brain scenarios.

Is there a limit to how many nodes can fail in Raft?

Yes, Raft can tolerate up to half of the nodes failing, as long as a majority remains operational to maintain consensus.

Can you give an example of a failure scenario in Raft?

Certainly! For instance, if the leader fails and two out of five nodes remain, the remaining nodes can elect a new leader to continue operations.