A set of EC2 Instances hosting a web layer · A database hosting a MySQL instance You need to add a layer that can be used to ensure that the most frequently accessed data from the database is fetched in a more fast and efficient manner from the database.

Question

You are developing an application that consists of the following architecture. · A set of EC2 Instances hosting a web layer · A database hosting a MySQL instance You need to add a layer that can be used to ensure that the most frequently accessed data from the database is fetched in a more fast and efficient manner from the database.

Which of the following can be used to accomplish this requirement?

A. An SQS queue to store the frequently accessed data

B. An SNS topic to store the frequently accessed data

C. A Cloudfront distribution to store the frequently accessed data

D. A Elasticache instance to store the frequently accessed data.

Answer 1

Answer - D.

The AWS Documentation mentions the following.

Amazon ElastiCache offers fully managed Redis and Memcached.

Seamlessly deploy, run, and scale popular open source compatible in-memory data stores.

Build data-intensive apps or improve your existing apps' performance by retrieving data from high throughput and low latency in-memory data stores.

Amazon ElastiCache is a popular choice for Gaming, Ad-Tech, Financial Services, Healthcare, and IoT apps.

Option A is incorrect because this is a messaging service.

Option B is incorrect because this is a notification service.

Option C is incorrect because this is a web distribution service.

For more information on Amazon ElastiCache, please refer to the below URL-

https://aws.amazon.com/elasticache/

Out of the given options, the most appropriate solution to the problem is to use Elasticache. Elasticache is a web service offered by AWS that makes it easy to deploy, operate, and scale an in-memory cache in the cloud. It is designed to improve the performance of web applications by allowing frequently accessed data to be stored in a cache, which can be accessed more quickly than retrieving the data from the database.

Option A (SQS queue) is not a suitable solution for this problem. SQS is a distributed message queue service that enables decoupling and scaling microservices, distributed systems, and serverless applications. However, it does not offer any in-memory caching capabilities and does not improve the performance of frequently accessed data.

Option B (SNS topic) is also not a suitable solution for this problem. SNS is a managed pub/sub messaging service that enables messaging and fan-out scenarios for application components. It is not designed for caching frequently accessed data and does not offer any in-memory caching capabilities.

Option C (Cloudfront distribution) is also not a suitable solution for this problem. Cloudfront is a content delivery network (CDN) offered by AWS that enables faster delivery of static and dynamic web content, including images, videos, and applications. While Cloudfront can cache frequently accessed data, it is not designed for caching dynamic database data, such as the data stored in a MySQL database.

Option D (Elasticache instance) is the most suitable solution for this problem. Elasticache is a fully managed in-memory data store service that enables caching of frequently accessed data. It supports two popular open-source in-memory caching engines: Memcached and Redis. Elasticache can be integrated with a variety of AWS services, including EC2 instances, RDS databases, and Lambda functions. It can also be used to scale applications by handling a large number of requests without putting excessive load on the database.

Therefore, the correct answer to the given question is option D (Elasticache instance).