reading-notes

AWS: Events

AWS SQS vs SNS

1. What is the difference betweeen SQS and SNS?

SNS is like the a ‘published-subscriber’ service. SQS is like a queueing service.

2. What are some use cases for both SNS and SQS?

Choose SNS if:

• You would like to be able to publish and consume batches of messages.
• You would like to allow same message to be processed in multiple ways.
• Multiple subscribers are needed.

Choose SQS if:

• You need a simple queue with no - particular additional requirements.
• Decoupling two applications and allowing parallel asynchronous processing.
• Only one subscriber is needed.

AWS SNS and SQS

1. Describe how to use SQS and SNS in a “fanout” pattern.

In a “fanout” pattern, a message published to an SNS topic is distributed to multiple SQS queues in parallel.

2. Explain how “push notifications” work, using SNS.

Subscribers get notifications when ‘Messages’ are pushed to publishers in SNS.

SQS and SNS Basics

1. How might a large scale, distributed application make use of a Queue system like SQS?

Bookmark and Review

• SNS Javascript SDK
• SQS Javascript SDK

Things I Want To Know More About

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In-class notes

• Topics - these are like ‘events’ in the ‘event pool’

• SNS - simple notification service

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