You have implemented a large Hadoop MapReduce cluster and the applications and users are multiplying. You
are now faced with requests for interactive and streaming data applications while you still need to support the
original MapReduce batch Jobs. Select the best option for continued support and performance.
A.
Just add several data nodes as Hadoop clusters are designed to scale-up easily
B.
Keep your original cluster configuration, all that is needed is re-optimizing the Oozie-workflow management
C.
Implement Yarn to decouple MapReduce and resource management
D.
Implement Apache Cassandra to automatically optimize multi-tenancy workloads