Fault Tolerance using Raft explained Part2| Distributed systems | Raft vs Paxos | MIT Lecture Series

Raft is a consensus algorithm for managing a replicated
log. It produces a result equivalent to (multi-)Paxos, and
it is as efficient as Paxos, but its structure is different
from Paxos; this makes Raft more understandable than

Paxos and also provides a better foundation for build-
ing practical systems. In order to enhance understandabil-
ity, Raft separates the key elements of consensus, such as

leader election, log replication, and safety, and it enforces
a stronger degree of coherency to reduce the number of
states that must be considered. Results from a user study
demonstrate that Raft is easier for students to learn than
Paxos. Raft also includes a new mechanism for changing

the cluster membership, which uses overlapping majori-
ties to guarantee safety.

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