Solved
Pricing for gateway nodes
Cloudera pricing is per-node: https://www.cloudera.com/products/pricing.html
Is it only for service nodes or for gateway nodes as well?
For example, I have a cluster:
HDFS NameNode: 1 node
HDFS DataNode: 3 nodes
HDFS gateway with my custom app using HDFS: 1 node
What is the number of nodes to pay for in this example?

