Thanks for clarification. This was actually for the Voldemort capacity modelling work I am doing.I see, I didn't mean to jump to conclusions. If you have additional questions on JE 4.1 Btree, just let me know.
About the duplicate issues, I do understand the problem. But unfortunately, ruling out duplicates is impossible with Voldemort, since it needs to handle concurrent writes and support conflict resolution later on., Diego's solution makes sense. But there are some Voldemort/distributed systems issues that needs to be flushed out. We are working with him on that.Great, I'm glad to hear that!