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Date: Thu, 24 Jan 2013 12:22:04 -0500
From: Adam McDougall <mcdouga9@egr.msu.edu>
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To: freebsd-fs@freebsd.org
Subject: Re: gmirror doubt.
References: <CAOfEmZiw--QV=Taic=c8P=2=+kVReqMjsr=6=KRCQ_pSbSgAZA@mail.gmail.com>
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On 1/24/2013 11:50 AM, Pawel Jakub Dawidek wrote:
> On Thu, Jan 24, 2013 at 07:04:01PM +0800, Marcelo Araujo wrote:
>> Hello Guys,
>>
>> I'm wondering if is possible load the gmirror without activate the mirrors.
>>
>> As an example:
>> I have several mirrors using gmirror, when I'm loading gmirror, all mirrors
>> that are activated are loaded. What I'd like to do is totally the oposite,
>> something like: Load gmirror, and active every mirror by myself.
>>
>> Anyone with more experience with geom could give me a clue about it?
> Unfortunately it is not possible. You could probably prepare some hack
> that would keep all gmirror components open for writing during load of
> gmirror module, which would prevent gmirror from using them immediately,
> but it would be gross.
>
> Alternatively you could introduce even simple sysctl which, when set,
> will disable tasting in gmirror globally.
>
Just putting in my 2 cents that I'd LOVE LOVE LOVE a sysctl to disable
tasting by geom, even if global.  My #1 extreme frustration with gmirror,
gjournal etc is the difficulty of removing the on-disk config when the
kernel is fighting you to keep re-tasting it and keeping it active.