Adrian Cockcroft, Director, Cloud Architecture at Netflix posted the following presentation, Performance Architecture for Cloud on Slideshare yesterday. In this presentation, he shares the concerns Netflix has with AWS Load Balancer limitations, and how SimpleDB needs a memcached front end in addition to several other limitations Netflix has found. He makes additional recommendations through the presentation deck that are worth checking out given the extent of the AWS outage over the last four days. His brief but insightful coverage of Performance Tools Architecture and assertion that AWS is challenged by data center tools and metrics is prescient given the outage that occurred.