Date: Thu, 9 Jan 2014 11:28:11 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Miroslav Lachman" <000.fbsd@quip.cz>, "Jia-Shiun Li" <jiashiun@gmail.com> Cc: Karl Pielorz <kpielorz_lst@tdx.co.uk>, freebsd-geom@freebsd.org Subject: Re: Is TRIM working with gmirror? Message-ID: <C0931F1E2D924A349E0C1FAA001C4AC8@multiplay.co.uk> References: <52A90049.7050001@quip.cz> <18C59233568D3A475FF0D843@study64.tdx.co.uk> <52CB2915.7060602@quip.cz> <7FBCC53840FA45928B9F527EA235B632@multiplay.co.uk> <52CB4C9E.3020904@quip.cz> <41F7CA403B574953B72B6CF4D1DDE71D@multiplay.co.uk> <52CBEE9E.2090800@quip.cz> <353E7C512D234EDE84863C872D7856DE@multiplay.co.uk> <C38DE9655CBB41029AF5CF0583CD2ACC@multiplay.co.uk> <52CD67F7.2060608@quip.cz> <9EFFBE4E8F3D4B9EA73C028247D15BD6@multiplay.co.uk> <52CDCB7A.20608@quip.cz> <CAHNYxxNEin%2BCoHi9h7-J1rTaeDK%2BytAOepM5Cg7YHTCY%2BOT3hg@mail.gmail.com> <52CE74BC.9000606@quip.cz>
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----- Original Message -----
From: "Miroslav Lachman" <000.fbsd@quip.cz>
> Jia-Shiun Li wrote:
>> On Thu, Jan 9, 2014 at 6:04 AM, Miroslav Lachman<000.fbsd@quip.cz> wrote:
>>> Steven Hartland wrote:
>>> It is production server, so I can't play with it and try 10.x, but we are
>>> running some other servers on 9.2, so if 9.2 gmirror has support for TRIM, I
>>> can upgrade this server to 9.2.
>>
>> According to release notes, gmirror TRIM is supported since 9.1R.
>>
>> I did a little test on 9.2R livecd environment with commands you
>> stated in previous mail. Both amd64& i386 work. 2 md devices were
>> used as backend device, but it should not differ since gmirror reports
>> 'candelete' attribute regardless of backend capability.
>>
>> The above seem to conflict with your result on 9.2 test machines.
>> Could you confirm that? Maybe there's something missing.
>
> The machine with SSD disks and TRIM on gmirror is running FreeBSD 8.4,
> not 9.2.
> It is strange anyway, because 8.4R is 6 month newer than 9.1R and has
> many improvements over 9.1R (for example ZFS feature flags).
> So if 9.1R has support for TRIM in gmirror, it can be expected in 8.4 too.
>
> Thank you for detailed explanation. I will try upgrade to 9.2 soon.
Looks like the geom changes where just never MFC'ed back to 8 so its not
in any of the 8 releases.
Regards
Steve
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