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Raft Consensus Algorithm
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Leader Election
A period where a new leader is chosen amongst the nodes in case the current leader fails or during startup.
Commit Index
A network-wide, replicated state indicating the highest log entry known to be committed.
AppendEntries RPC
Remote procedure call used by the leader to replicate log entries and to serve as a heartbeat.
RequestVote RPC
A request sent by candidates to other nodes to ask for their votes during elections.
Log Replication
The process of sharing and synchronizing log entries among all Raft nodes.
Term
A logical time unit in Raft during which a leader may be established.
Candidate
A node that is vying to become the leader during an election period.
Heartbeat Mechanism
Used by the leader to signal that it's alive and to prevent new elections.
Log Entry
An individual record within the Raft log, which consists of a command for the state machine, and term number.
Follower
A node that is not a leader; follows leader directions for the log entries and elections.
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