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{
 "partitions":
  [
    {"topic": "topic1", "partition": "0"},
    {"topic": "topic1", "partition": "1"},
    {"topic": "topic1", "partition": "2"},
    {"topic": "topic2", "partition": "0"},
    {"topic": "topic2", "partition": "1"}
  ]
}

FAQ

What happens if the preferred replica is not in the ISR?

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The goal of this tool is similar to the Referred Preferred Replica Leader Election Tool as to achieve load balance across brokers. But instead of only electing a new leader from the assigned replicas of a partition, this tool allows to change the assigned replicas of partitions – remember that followers also need to fetch from leaders in order to keep in sync, hence sometime only balance the leadership load is not enough.

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$ ./bin/kafka-reassign-partitions.sh --topics-to-move-json-file topics-to-move.json --broker-list "5,6,7" --generate --zookeeper localhost:2181

$ cat topics-to-move.json
{"topics":
     [{"topic": "foo1"},{"topic": "foo2"}],
     "version":1
}

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