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you would think they would have learned to build redundancy into these types of systems.

They have been working hard on this very issue..

http://techblog.netflix.com/2012/07/chaos-monkey-released-in...

It'll be interesting to see what failed when they put out a statement.

Usually Netflix do well when AWS has an outage... At least in the past that was the case, so it really pick my curiosity on what is the difference with this outage vs the others. In addition it will be interesting to know if the timing of it -aka just before XMas- did affect the responsiveness of the engineers/team for both Amazon and Netflix.

The difference is that elastic load balancers are the things that actually implement the redundancy in AWS, and if one goes down and another can't be immediately started in it's place, no traffic will be getting to the instances that sit behind it.

I believe AWS has been working on a solution to this, but thus far haven't released anything.

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