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Setting up a mirror is easy - simply start up the mirror-maker processes after bringing up the target cluster. At minimum, the mirror maker takes one or more consumer configurations, a producer configuration and either a whitelist or a blacklist. You need to point the consumer to the source cluster's ZooKeeper, and the producer to the mirror cluster's ZooKeeper (or use the broker.list parameter).

bin/kafka-run-class.sh kafka.tools.MirrorMaker --consumer.config sourceCluster1Consumer.config --consumer.config sourceCluster2Consumer.config --num.streams 2 --producer.config targetClusterProducer.config --whitelist=".*"

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