You are developing a new mobile application which is expected to be used by thousands of customers. You are considering to store user preferences in AWS and need a non-relational data store to save the same. Each data item is expected to be 20KB in size. The solution needs to be cost-effective, highly available, scalable, and secure. Which of the following designs is the most suitable?

Answer options:

A.Create a new Amazon RDS instance and store the user data there.
B.Create a Amazon DynamoDB table with the required Read and Write capacity and use it as the data layer.
C.Use Amazon Glacier to store the user data.
D.Use an Amazon Redshift Cluster for managing the user preferences.

Correct Answer – B
In this case, since each data item is 20KB and given the fact that DynamoDB is an ideal data layer for storing user preferences, this would be the ideal choice. Also, DynamoDB is a highly scalable and available service. 
For more information on AWS DynamoDB, please refer to the URL given below:
https://aws.amazon.com/dynamodb/