The interesting problem is that the underlying AWS system seems to come up with more and more interesting failure modes due to system complexity, that the testi

The interesting problem is that the underlying AWS system seems to come up with more and more interesting failure modes due to system complexity, that the testing could never catch. Like Netflix had a major outage recently on Christmas Eve 2012. http://techblog.netflix.com/2012/12/a-closer-look-at-christmas-eve-outage.html http://techblog.netflix.com/2012/12/a-closer-look-at-christm...