AWS Serverless Microservices with Patterns and Best Practices - Serverless Pattern: Topic-Queue Chaining and Load Balanc

The video tutorial discusses the topic queue chaining load balancing pattern using Amazon SQS. It explains how queues act as buffers between services to prevent data loss during asynchronous invocations. The tutorial covers the publish-subscribe pattern, its challenges, and how topic queue chaining can address these issues. It highlights the benefits of using Amazon SQS for load balancing and demonstrates its application in a serverless e-commerce architecture. The video concludes with a summary and implementation guidance using AWS CDK.

What is the primary role of a queue in the topic queue chaining pattern?

• To act as a database

• To directly notify consumers

• To serve as a buffer between services

• To replace the publisher service

In the publish-subscribe model, what happens if a subscriber service goes offline?

• The event is lost and cannot be processed later

• The publisher stops sending messages

• The event is stored for later processing

• The event is redirected to another service

How does Amazon SQS help in scaling subscriber services?

• By directly notifying all subscribers

• By acting as a buffering load balancer

• By storing messages in a database

• By reducing the number of messages

What is a key advantage of using Amazon SQS in microservices architecture?

• It increases the speed of message delivery

• It ensures messages are durable and persistent

• It reduces the need for a publisher service

• It eliminates the need for a database

In the ecommerce application, what role does Amazon SQS play?

• It acts as a database for storing orders

• It processes payments directly

• It stores messages for asynchronous processing

• It replaces the checkout service

Why is it beneficial to store messages in Amazon SQS during service downtime?

• Messages can be processed once the service is back online

• It eliminates the need for a backup service

• It speeds up the message delivery

• It reduces the cost of operations

What pattern is used to ensure messages are not lost in the ecommerce architecture?

• Direct communication pattern

• Synchronous messaging pattern

• Topic queue chaining pattern

• Database storage pattern