- Raft is a concensus algorithm that is an alternative to Paxos.
- It offers a generic way to distributed a state machine across a cluster of computing systems, ensuring that each node in the cluster agrees upon the same series of state transactions.
- Reliable, Replicated, Redundant, and Fault Tolerant.
- Leader election
- Log replication
- Leader: onyl one leader
- Candidate: leader candidates in the election process
- Follower: Do not send any request, only accespt heartbeat from laeader, except forwarding requests from client to leader
Changing of roles
- Follower: When meets heartbeat timeout. convert