Apache Hadoop High Availability
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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 ResourceManagers, see "Hardware for Master Nodes" in the Cluster Planning Guide.

  • 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.