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From Brandon Williams <dri...@gmail.com>
Subject Re: how to increase compaction rate?
Date Mon, 12 Mar 2012 13:52:35 GMT
On Mon, Mar 12, 2012 at 4:44 AM, aaron morton <aaron@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

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