I agree with all of that. But the original poster was claiming 10k SELECTs/second on a 10TB data set. That just sounds fishy to me. If your dataset fits in m

I agree with all of that. But the original poster was claiming 10k SELECTs/second on a 10TB data set. That just sounds fishy to me. If your dataset fits in memory on one node, I'm all about using a database (prefer MySQL personally, might look at postgres now that it finally has replication).