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4 of 4
1Explain the replication handshake and partial resync (PSYNC2).
2How does Redis Sentinel work, and what are its failure scenarios?
3In Redis Cluster, explain how keys are distributed and what happens during a resharding.
4What is the CAP tradeoff in Redis Cluster, and how does it handle network partitions?
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04 / 04

What is the CAP tradeoff in Redis Cluster, and how does it handle network partitions?

Redis Cluster favors AP (availability + partition tolerance). During a partition, the minority side stops accepting writes after cluster-node-timeout. You can lose data if a master fails before its replica is caught up (async replication). For CP guarantees, use WAIT command to block until N replicas acknowledge.