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Data Systems⚪New

🧩 Consensus

The problem of getting several nodes to agree on something (e.g., who is the leader) in an unreliable network.

⬇️ Foundation

🎯 Mastery Criteria

✔Student can explain the specific problem 2-Phase Commit (2PC) tries to solve vs Raft/Paxos.

⚠️ Common Trap

Consensus is easy if nodes just talk to each other (ignores network partitions).