TRIM or no TRIM?

[Steven Hartland]

----- Original Message ----- 
From: "Karl Pielorz" 
> --On 24 July 2013 12:10 +0100 Steven Hartland <killing at multiplay.co.uk> 
> wrote:
> 
>> I'm guessing that the software raid your using doesn't support TRIM then
> 
> So the question has to change to 'Does GEOM GRAID support, or allow TRIM' :)
> 
>> Have you considered switching to ZFS based install, which does support
>> TRIM in 9.2, 9/stable and 8/stable?
> 
> These are MySQL hosts - until we've got some experience running MySQL on 
> top of ZFS we'll stick with UFS for now - nice idea though (and we already 
> have other boxes using ZFS).

gmirror may be another alternative that may correctly work with TRIM.

For reference correctly setup MySQL performance on ZFS works well for
use. Of particular interest is some of our data is highly compressible
making ZFS compression of particular benefit for our work load.

    Regards
    Steve

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