Consensus Algorithms

How Raft Work?

Answer

Raft is a consensus algorithm that ensures all nodes in a distributed system agree on a shared log, even with failures. It works by electing a leader, which handles all client requests and replicates log entries to followers. Followers apply entries once a majority (quorum) agrees.

Raft has three main phases: Leader Election, Log Replication, and Safety. If a follower doesn't hear from a leader, it becomes a candidate and starts an election. Once elected, the leader sends periodic heartbeats to maintain authority. This design is easier to understand and implement compared to Paxos.