simple question here, I know these large sites like digg etc. have a wall of memcache servers that handle requests before hitting their actual master/slave db's.
What would these servers look like, would they be just bare bone linux servers with like 32GB of ram?
Are there any security concerns that need to be addressed? I was just thinking if someone could somehow grab objects from memcache, you could very well have a User object stored that has the users username/pwd in it!