On Mon, Mar 12, 2012 at 4:44 AM, aaron morton <aa...@thelastpickle.com> wrote: > I don't understand why I > don't get multiple concurrent compactions running, that's what would > make the biggest performance difference. > > concurrent_compactors > Controls how many concurrent compactions to run, by default it's the number > of cores on the machine.
With leveled compaction, I don't think you get any concurrency because it has to compact an entire level, and it can't proceed to the next level without completing the one before it. In short, if you want maximum throughput, stick with size tiered. -Brandon
