F1 Leader Election & Distributed Coordination

ZooKeeper, Raft consensus, and coordination primitives at Meta scale

Leader election protocols and distributed coordination for system design interviews. Cover why leader election is needed, the Raft consensus algorithm (leader election, log replication, safety), ZooKeeper's coordination primitives (ephemeral nodes, watches, sequential nodes), and practical applications: Kafka controller election, distributed locks, config management, and service discovery.

Estimated time: 15 minutes

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