I didn't think there'd be that much discussion on my point (seq hdd > rand sdd). > In the memory-mapped case, that means using multiple threads. My gut tells

I didn't think there'd be that much discussion on my point (seq hdd > rand sdd). > In the memory-mapped case, that means using multiple threads. My gut tells me I'd lose more to contention/false-sharing than I'd gain through multithreading - but I haven't done the experiment.