Preparing the Hardware Resources

Make sure that you prepare the hardware resources before configuring the Resource Manager for High Availability.

• 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.