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Elasticache Quiz

14,878

A company planning on building and deploying a web application on AWS, needs to have a data store to store session data. Which of the below services can be used to meet this requirement?

A. AWS RDS

B. AWS SQS

AWS ELB

D. AWS ElastiCache

D. AWS ElastiCache
AWS Documentation mentions the following:

Amazon ElastiCache offers fully managed Redis and Memcached. Seamlessly deploy, operate, and scale popular open source compatible in-memory data stores. Build data-intensive apps or improve the performance of your existing apps 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.

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

https://aws.amazon.com/elasticache/
Option A is incorrect. RDS is a distributed relational database. It is a web service running “in the cloud” designed to simplify the setup, operation, and scaling of a relational database for use in applications.

Option B is incorrect. SQS is a fully managed message queuing service that makes it easy to decouple and scale microservices, distributed systems, and serverless applications.

Option C is incorrect. ELB is Elastic Load Balancer which automatically distributes incoming application traffic across multiple targets.

Note:

In order to address scalability and to provide a shared data storage for sessions that can be accessible from any individual web server, you can abstract the HTTP sessions from the web servers themselves. A common solution to for this is to leverage an In-Memory Key/Value store such as Redis and Memcached.

In-memory caching improves application performance by storing frequently accessed data items in memory, so that they can be retrieved without access to the primary data store. Properly leveraging caching can result in an application that not only performs better, but also costs less at scale. Amazon ElastiCache is a managed service that reduces the administrative burden of deploying an in-memory cache in the cloud.

Please refer the following white paper for more information.

https://d0.awsstatic.com/whitepapers/performance-at-scale-with-amazon-elasticache.pdf

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