Re: Improving Performance with more OSD's?

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On Mon, Dec 29, 2014 at 12:47 PM, Tomasz Kuzemko <tomasz.kuzemko@xxxxxxx> wrote:
> On Sun, Dec 28, 2014 at 02:49:08PM +0900, Christian Balzer wrote:
>> You really, really want size 3 and a third node for both performance
>> (reads) and redundancy.
>
> How does it benefit read performance? I thought all reads are made only
> from the active primary OSD.
>
> --
> Tomasz Kuzemko
> tomasz.kuzemko@xxxxxxx

You`ll have chunks of primary data scattered between three devices
instead of two, as each pg will have a random acting set (until you
decide to pin primary).
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