A company wants an in-memory data store that is compatible with open source in the cloud. Which AWS service should the company use?

Amazon ElastiCache is a fully managed in-memory data store and caching service. It directly meets the requirements by supporting two popular open-source in-memory engines: Redis and Memcached. This service is designed to improve application performance by providing fast, in-memory data access, which aligns perfectly with the need for an "in-memory data store that is compatible with open source." It is used for caching, session management, gaming leaderboards, and real-time analytics, all of which benefit from low-latency, in-memory data retrieval.

A. Amazon DynamoDB is a NoSQL database that primarily stores data on solid-state drives (SSDs), not an in-memory data store.

C. Amazon Elastic Block Store (Amazon EBS) provides persistent block-level storage volumes (like a hard drive) for EC2 instances, not an in-memory data store.

D. Amazon Redshift is a data warehousing service optimized for large-scale data analytics, storing data on disk in a columnar format.

1. AWS Documentation

"What Is Amazon ElastiCache?": "Amazon ElastiCache is a web service that makes it easy to set up

manage

and scale a distributed in-memory data store or cache environment in the cloud. [...] Amazon ElastiCache supports the most popular open-source in-memory caching engines

Redis and Memcached."

Source: Amazon ElastiCache for Redis User Guide

"What Is Amazon ElastiCache?"

Introduction.

2. AWS Documentation

"Databases on AWS": This overview page categorizes AWS database services. ElastiCache is listed under "In-memory databases

" while DynamoDB is under "Key-value databases

" Redshift is under "Data warehouse

" and EBS is a storage service

not a database.

Source: AWS Official Website

"Databases on AWS"

Service comparison section.

3. AWS Documentation

"What is Amazon DynamoDB?": "Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. [...] DynamoDB stores data on solid state drives (SSDs)."

Source: Amazon DynamoDB Developer Guide

"What is Amazon DynamoDB?"

Introduction.

4. AWS Documentation

"Amazon Elastic Block Store (Amazon EBS)": "Amazon Elastic Block Store (EBS) is an easy-to-use

high-performance block-storage service designed for use with Amazon Elastic Compute Cloud (EC2) for both throughput and transaction-intensive workloads at any scale."

Source: Amazon EBS User Guide

"Amazon Elastic Block Store (Amazon EBS)"

Introduction.