I'd like to pose a Redis question to the community at large. On HN, I keep hearing about how awesome it is, how readable the codebase is, how efficient and well thought out it generally is.

That's all fine, but there is incredible resistance in many enterprises to adopting new technology. I recently faced a similar problem trying to get people to move to Redis, and the feeling is that there isn't enough "enterprise social proof".

So my questions to anyone who has deployed a large enough Redis cluster (and by cluster, I mean replication, since sharding isn't apparently supported yet):

-- What is the largest instance you have run? -- How reliable has that instance been? -- How easy is it to maintain and administer? -- What are some issues you would warn other enterprise users about?