KIP-986 — Cross-Cluster Replication

Discussion MirrorMakerBroker

Proposes building cross-cluster replication natively inside the Kafka broker (as opposed to external MirrorMaker processes), using new internal replication protocol and management APIs. MirrorMaker 1 and 2 run as separate processes that can independently fail, require separate deployment, and cannot leverage broker-internal optimizations (zero-copy transfers, direct partition assignment knowledge).

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