Anyone have any experience/thoughts on using spot instances with Hadoop? Specifically, regular instances with Hadoop installed (not via Elastic Map Reduce). The cost savings are potentially huge, but I'd hate to lose my instances 80-90% of the way through a set of long running (12-48h) jobs. I guess if I had EBS backed instances I could relaunch and resume, but I'm not sure how well that'd work in practice.