A database, hosted using the Amazon RDS service, is getting many database queries. It has now become a bottleneck for the associating application. Which action would ensure that the database is not a performance bottleneck?

Answer options:

A.Setup a CloudFront distribution in front of the database.
B.Setup an ELB in front of the database.
C.Setup ElastiCache in front of the database.
D.Setup SNS in front of the database.

Correct Answer – C
ElastiCache is an in-memory solution that can be used in front of a database to cache the common queries issued against the database. This can reduce the overall load on the database.
Option A is incorrect because this is normally used for content distribution.
Option B is partially correct. But you need to have one more database as an internal load balancing solution.
Option D is incorrect because SNS is a simple notification service.
For more information on ElastiCache, please visit the following URL:
https://aws.amazon.com/elasticache/