This guide details a step‑by‑step migration from a cloud‑hosted Kafka service to a self‑managed on‑premises cluster, covering requirements, a data‑synchronization strategy using Kafka MirrorMaker, consumer offset alignment, potential pitfalls, and practical scripts to ensure a smooth transition.
Apache Kafka 2.4.0 introduces a range of new capabilities—including consumer replica fetching, incremental cooperative rebalancing, MirrorMaker 2.0, a new Java authorization API, KTable non‑key joins, administrative replica reassignment, protected REST endpoints, and offset deletion—along with numerous performance and stability improvements.
Kafka MirrorMaker provides near‑real‑time cross‑data‑center replication by consuming from a source cluster and producing to a target cluster, and this guide explains its core features, new vs. old consumer APIs, partition assignment strategies, performance tuning, network considerations, and practical command‑line examples.
