[最佳答案] I found the perfect solution for my use case: memcachedb It doesn't do fancy document/indexing, it's just a simple key value store. I didn't do any performance testing yet though. Edit: We dropped memcachedb due to problems with replication. Instead we run now mongodb. Mongodb requires much more disk space, and more resources in general. But the replica sets work very reliable and are easy to set up.
