You’ve configured your cluster with HDFS Federation. One NameNode manages the /data
namesapace and another Name/Node manages the /reports namespace. How do you configure a
client machine to access both the /data and the /reports directories on the cluster?

A.
Configure the client to mount the /data namespace. As long as a single namespace is mounted
and the client participates in the cluster, HDFS grants access to all files in the cluster to that client.

B.
Configure the client to mount both namespaces by specifying the appropriate properties in the
core-site.xml

C.
You cannot configure a client to access both directories in the current implementation of HDFS
Federation.

D.
You don’t need to configure any parameters on the client machine. Access is controlled by the
NameNodes managing the namespace.

Explanation:
Note: HDFS Federation improves the existing HDFS architecture through a clear separation of
namespace and storage, enabling generic block storage layer. It enables support for multiple
namespaces in the cluster to improve scalability and isolation. Federation also opens up the
architecture, expanding the applicability of HDFS cluster to new implementations and use cases.
Hortonworks, An Introduction to HDFS Federation