Just as I mentioned in today's thread on FathomDB, I'd be interested in what kind of workload scales linearly to 50 cores. I'm guessing its not very join heavy. H-Store's main advance, IIRC, was that it pushed many points of RDBMS engine operation into RAM. While this would indeed make the engine much faster and eliminate some historical cruft, I don't remember any fundamental breakthrough that would make distributed joins scale out very well. Anyone have any insights on how they are handling joins?