Amazon CLF-C01 Exam: Enhancing Read Performance for NoSQL Databases with AWS Services

Enhancing Read Performance with AWS Services for NoSQL Databases

Question

Which AWS service can be deployed to enhance read performance for applications while reading data from NoSQL database?

Answers

Explanations

Click on the arrows to vote for the correct answer

A. B. C. D.

Correct Answer - B.

Amazon DynamoDB Accelerator (DAX) is a caching service for DynamoDB which can be deployed in VPC in a region where DynamoDB is deployed.

For read-heavy applications, DAX can be deployed to increase throughput by providing in-memory caching.

Option A is incorrect because Amazon Route 53 is an AWS DNS service and cannot improve the performance of DynamoDB.Option C is incorrect because Amazon CloudFront is a global content delivery network that cannot be applied to a DynamoDB table.

Option D is incorrect because AWS Greengrass is data caching software for connected devices.

For more information on caching solutions with AWS, refer to the following URL:

https://aws.amazon.com/caching/aws-caching/

The AWS service that can be deployed to enhance read performance for applications while reading data from NoSQL database is Amazon DynamoDB Accelerator (DAX). Therefore, the correct answer is B.

Amazon DynamoDB is a fully-managed NoSQL database service that delivers single-digit millisecond performance at any scale. It is designed to handle large amounts of structured and unstructured data and supports both document and key-value data models. However, even though DynamoDB offers high performance, some applications may still require faster access to frequently accessed data.

Amazon DynamoDB Accelerator (DAX) is a fully managed, highly available, and in-memory cache for DynamoDB that improves the performance of read-intensive workloads. It can reduce the response time for read requests from milliseconds to microseconds, even at millions of requests per second.

DAX is a write-through caching service, meaning that it caches data from DynamoDB in its in-memory cache. When an application requests data from DynamoDB, DAX first checks if the data is available in its cache. If the data is available in the cache, DAX returns it to the application without accessing DynamoDB. If the data is not available in the cache, DAX retrieves it from DynamoDB, caches it in memory, and returns it to the application.

By using DAX, applications can significantly improve the read performance of their NoSQL database without requiring any changes to the application logic. DAX is compatible with existing DynamoDB API calls, and applications can use DAX with existing DynamoDB tables and indexes.

Therefore, Amazon DynamoDB Accelerator (DAX) is the AWS service that can be deployed to enhance read performance for applications while reading data from NoSQL database.