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Two new configuration options will be introduced — cluster.id and auto.storage.format. When both options are present, during startup in a KRaft broker, the storage directories are “formatted” if necessary. The operation is mostly equivalent of the following command is run at startup:

scriptsbin/kafka-storage.sh format \
  --cluster-id <cluster.id> \
  --config <broker.properties> \
  --ignore-formatted

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