1. Hardware Resources

Ensure that you prepare the following hardware resources:

  • ResourceManager machines: The machines where you run Active and Standby ResourceManagers should have exactly the same hardware. For recommended hardware for Hadoop, see Hardware recommendations for Apache Hadoop.

  • Zookeeper machines: For automated failover functionality, there must be an existing Zookeeper cluster available. The Zookeeper service nodes can be co-located with other Hadoop daemons.

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