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Elasticache Quiz

14,872

You have the following architecture deployed in AWS:
a) A set of EC2 Instances which sit behind an ELB
b) A database hosted in AWS RDS Of late, the performance on the database has been slacking due to a high number of read requests.
Which of the following can be added to the architecture to alleviate the performance issue?

A. Enable Multi-AZ to add a secondary read-only DB in another AZ.

B. Use ElastiCache in front of the database.

C. Use AWS CloudFront in front of the database.

D. Use DynamoDB to offload all the reads. Populate the common read items in a separatetable.

B. Use ElastiCache in front of the database.
Amazon ElastiCache is an in-memory cache
which can be used to cache common read requests.The below diagram shows how caching can be added to an existing architecture:For more information on database caching, please visit the below URL:https://aws.amazon.com/caching/database-caching/Note:Option A is incorrect because,If we enable this, again the data is going to serve from another disk, latencywill be there.Option C is incorrect because,CloudFront is a valuable component of scaling a website, especially for geo-location workloads and queries. And more advanced for given architecture.Option Dis incorrect because, it will have latency and additional changes as well.So the best and possible way is option B.

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