AWS Elastic Block Storage Scares Me
Take a look at the last half-dozen or so publicized outages at Amazon. Every single time it was a failure in EBS—including the multi-day EBS outage in April 2011. I still love AWS. If you have an elastic (scaling) workload, it's awesome. Normally I have a hard time taking a dependency of third-party behavior which facilitates vendor lock-in, but Amazon makes it so incredibly easy because their cloud is vastly more capable when compared to other cloud providers. »