Re: wip-librbd-caching

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On 12 April 2012 20:45, Sage Weil <sage@xxxxxxxxxxxx> wrote:
> I'm not familiar with the performance implications of KSM, but the
> objectcacher doesn't modify existing buffers in place, so I suspect it's a
> good candidate.  And it looks like there's minimal effort in enabling
> it...

It uses some CPU when calculating hashes, although I believe if it
gets to be too resource consuming it is possible to disable it and
continue to use the shared pages you have already calculated, just not
updating or checking for any others that could be shared.
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