February 2011
Intermediate to advanced
186 pages
5h 12m
English
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Chapter 4. Decoupling with SQS, SimpleDB, and SNS
Take a moment to look back at what we’ve achieved so far. We started with a simple web application, with an infrastructure that was ready to fail. We took this app and used AWS services like Elastic Load Balancing and Auto Scaling to make it resilient, with certain components scaling out (and in) with traffic demand. We built an infrastructure (without any investment) that is capable of handling huge traffic at relatively low operational cost. Quite a feat!
Scaling beyond this amount of traffic requires more drastic changes in the application. We need to decouple, and for that we’ll use Amazon SimpleDB, Amazon Simple Notification Service (SNS), and Amazon Simple Queue Service (SQS), together with S3, which we have already seen in action. But these services are more versatile than just allowing us to scale. We can use the decoupling principle in other scenarios, either because we already have distinct components or because we can easily add functionality.
In this chapter, we’ll be presenting many different use cases. Some are already in production, others are planned or dreamed of. The examples are meant to show what you can do with these services and help you to develop your own by using code samples in various languages. We have chosen to use real-world applications that we are working with daily. The languages are Java, PHP, and Ruby, and the examples should be enough to get you going in other languages with libraries available. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.