You have a 20 node Hadoop cluster, with 18 slave nodes and 2 master nodes running
HDFS High Availability (HA). You want to minimize the chance of data loss in you cluster.
What should you do?

A.
Configure the cluster’s disk drives with an appropriate fault tolerant RAID level

B.
Run the ResourceManager on a different master from the NameNode in the order to load
share HDFS metadata processing

C.
Run a Secondary NameNode on a different master from the NameNode in order to load
provide automatic recovery from a NameNode failure

D.
Set an HDFS replication factor that provides data redundancy, protecting against failure

E.
Add another master node to increase the number of nodes running the JournalNode
which increases the number of machines available to HA to create a quorum