Amazon Web Services in Action, Third Edition

14 Decoupling your infrastructure: Elastic Load Balancing and Simple Queue Service

This chapter covers

• The reasons for decoupling a system
• Synchronous decoupling with load balancers to distribute requests
• Hiding your backend from users and message producers
• Asynchronous decoupling with message queues to buffer message peaks

Imagine that you want some advice from us about using AWS, and therefore, we plan to meet in a café. To make this meeting successful, we must:

• Be available at the same time

• Be at the same place

• Find each other at the café

The problem with making our meeting happing is that it’s tightly coupled to a location. We live in Germany; you probably don’t. We can solve that problem by decoupling our meeting from the location. ...