What is Raft? Raft is a consensus algorithm that is designed to be easy to understand. It's equivalent to Paxos in fault-tolerance and performance. The difference is that it's decomposed …

A user study with 43 students at two universities shows that Raft is significantly easier to understand than Paxos: after learning both algorithms, 33 of these students were able to …

“There are significant gaps between the description of the Paxos algorithm and the needs of a real-world system...the final system will be based on an unproven protocol.”

“There are significant gaps between the description of the Paxos algorithm and the needs of a real-world system ... the final system will be based on an unproven protocol” — Chubby authors

“There are significant gaps between the description of the Paxos algorithm and the needs of a real-world system...the final system will be based on an unproven protocol.”

“There are significant gaps between the description of the Paxos algorithm and the needs of a real-world system...the final system will be based on an unproven protocol.”

Normal Operation Split Vote March 3, 2013 Raft Consensus Algorithm Slide Respond to RPCs from candidates and leaders. Convert to candidate if election timeout elapses without either:

Joint Consensus Raft uses a 2-phase approach: Intermediate phase uses joint consensus (need majority of both old and new configurations for elections, commitment) Configuration change is …

“This case is rare and typically occurs as a result of a network partition with replication lag. – OR – A consensus algorithm (built-in or library) Paxos, Raft, … A consensus service ZooKeeper, …

Watch out for @aphyr – OR – A consensus algorithm (built-in or library) Paxos, Raft, … A consensus service