A team is building an EMR Cluster in AWS. The cluster has already been created based on current capacity needs. After a duration of 3 months, based on the new storage requirements, it seems that the cluster does not have the required amount of storage based on these requirements. Which of the following can be used to ensure the storage of the cluster meets the new requirements with the least effect on the cluster. Choose 2 answers from the options given below

Answer options:

A.If the replication factor is high, you can reduce it on the cluster.
B.Add more nodes to the cluster
C.Recreate the cluster with more EBS volumes
D.Recreate the cluster with more EC2 Instances

Answer – A and B
The AWS Documentation mentions the following
If the calculated HDFS capacity value is smaller than your data, you can increase the amount of HDFS storage in the following ways:
Creating a cluster with additional EBS volumes or adding instance groups with attached EBS volumes to an existing cluster
Adding more core nodes
Choosing an EC2 instance type with greater storage capacity
Using data compression
Changing the Hadoop configuration settings to reduce the replication factor
Options C and D are incorrect because this would have a large operational impact on the cluster.
For more information on EMR Instance guidelines, please refer to the below URL
https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-plan-instances-guidelines.html