Specifications for Hadoop Cluster

All Hadoop-related nodes must meet the following specifications:

All cluster nodes must be running CentOS 6.x or CentOS 7.x, or Ubuntu 14.04
The cluster must be running HDP 2.5.x or HDP 2.6.x managed by Ambari 2.4.2 (or later)
The cluster must have a minimum of the following nodes:
- Two Hadoop master nodes
- Four Hadoop slaves nodes
- One node for Ambari
Each of the Hadoop Slave and Master nodes must meet the minimum specifications. See Meet Minimum System Requirements.
The following services must be installed across the Hadoop Master and Slave nodes:
- HDFS
- HBase
- ZooKeeper
- Kafka
- Storm
- YARN
To determine the supported version for each service, refer to Ambari, and choose Admin > Stacks and Versions.
Each of the following components must be installed on at least four slave nodes:
Note
For security reasons, no other workloads should be running on the cluster.

Figure 4.1. Ambari Component

	Note
	For security reasons, no other workloads should be running on the cluster.