On 6/30/12, Todd Underwood <toddunder@gmail.com> wrote:
This was not a cascading failure. It was a simple power outage Cascading failures involve interdependencies among components.
Actually, you can't really say that. It's true that it was a simple power outage for Amazon. Power failed, causing the AWS service at certain locations to experience issues. Any of the issues related to services at locations that didn't lose power are a possible result of cascade. But as for the other possible outages being reported... Instagram, Pinterest, Netflix, Heroku, Woot, Pocket, zoneedit. Possibly Amazon's power failure caused AWS problems, which resulted in issues with these services. Some of these services may actually have had redundancy in place, but experience a failure of their service as a result of unexpected cascade from the affected site.
T -- -JH