System Design
term
an epoch that increments each election
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Who Holds the PenSystem DesignMore terms from this board
- commitstored on a majority, now safe
- election timeoutrandom wait before a follower runs
- heartbeatleader's 'still alive' ping
- leader / follower / candidatethe three Raft roles
- log entryone command in order
- Paxosthe original (harder) consensus protocol
- quorum / majorityN/2+1
- Rafta readable consensus algorithm
- split-brain fenceold-term leaders ignored