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=== Approach of the consensus problem in Raft ===
Raft implements consensus by a leader approach. The cluster has one and only one elected leader which is fully responsible for managing log replication on the other servers of the cluster. It means that the leader can decide on new entries' placement and establishment of data flow between it and the other servers without consulting other servers. A leader leads until it fails or disconnects, in which case surviving servers elect a new leader
The consensus problem is decomposed in Raft into two relatively independent subproblems listed down below.
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