A solutions architect must optimize the costs of the cluster without negatively impacting the time it takes to run the various jobs. What is the MOST cost-effective solution that meets these requirements?
A. Modify the EMR cluster by turning on automatic scaling of the core nodes and task nodes with a custom policy that is based on cluster utilization. Purchase Reserved Instance capacity to cover the master node.
B. Modify the EMR cluster to use an instance fleet of Dedicated On-Demand Instances for the master node and core nodes, and to use Spot Instances for the task nodes. Define the target capacity for each node type to cover the load.
C. Purchase Reserved Instances for the master node and core nodes. Terminate all existing task nodes in the EMR cluster.
D. Modify the EMR cluster to use capacity-optimized Spot Instances and a diversified task fleet. Define target capacity for each node type with a mix of On-Demand Instances and Spot Instances.
Answer:B
A solutions architect must optimize the costs of the cluster without negatively impacting the time it takes to run the various jobs. What is the MOST cost-effective solution that meets these requirements?
A. Modify the EMR cluster by turning on automatic scaling of the core nodes and task nodes with a custom policy that is based on cluster utilization. Purchase Reserved Instance capacity to cover the master node. B. Modify the EMR cluster to use an instance fleet of Dedicated On-Demand Instances for the master node and core nodes, and to use Spot Instances for the task nodes. Define the target capacity for each node type to cover the load. C. Purchase Reserved Instances for the master node and core nodes. Terminate all existing task nodes in the EMR cluster. D. Modify the EMR cluster to use capacity-optimized Spot Instances and a diversified task fleet. Define target capacity for each node type with a mix of On-Demand Instances and Spot Instances.