[bkeroack]

That's the theory (or the marketing pitch, depending upon perspective).

The reality can be rather different[1][2][3].

1. http://money.cnn.com/2011/04/21/technology/amazon_server_out...

2. http://www.zdnet.com/article/amazon-web-services-suffers-out...

3. http://www.theregister.co.uk/2015/09/20/aws_database_outage/