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