Choose Three Reasons Why Should You Run the HDFS Balancer

Multiple Choice

Choose three reasons why should you run the HDFS balancer periodically? (Choose three)

A) To ensure that there is capacity in HDFS for additional data
B) To ensure that all blocks in the cluster are 128MB in size
C) To help HDFS deliver consistent performance under heavy loads
D) To ensure that there is consistent disk utilization across the DataNodes
E) To improve data locality MapReduce