Date: Thu, 06 Nov 2008 12:15:47 +0200 From: Volodymyr Kostyrko <c.kworr@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: gmirror + gjournal setup question Message-ID: <geug4k$dnt$1@ger.gmane.org> In-Reply-To: <d05df8620810291007y3d18e5b8g8674477f1f00d810@mail.gmail.com> References: <d05df8620810291007y3d18e5b8g8674477f1f00d810@mail.gmail.com>
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Gabriel Lavoie wrote:
> Hello,
> I would like to know what is the best way to setup gmirror + gjournal,
> on a slice level on two hard drives. Do I set up a mirrored journal
> partition + mirrored journalized slice (gmirror on top of gjournal) on which
> I create my labels with bsdlabels (will create /dev/mirror/name.journal,
> /dev/mirror/name.journala, /dev/mirror/name.journalb). Or I setup a
> journalized slice on both hard drive and then I mirror /dev/ad0s1.journal
> and /dev/ad1s1.journal (gjournal on top of gmirror)? I have hard time to
> figure out what would be the best, if I want to avoid mirror rebuild on
> power failure and I want fast fsck. I'd also like to make this setup on my
> 1st slice (which contains the root filesystem).
man gjournal:
...
When gjournal is configured on top of gmirror(8) or graid3(8)
providers,
it also keeps them in a consistent state, thus automatic
synchronization
on power failure or system crash may be disabled on those providers.
...
I think journaling a mirrored partition can be much better.
--
Sphinx of black quartz judge my vow.
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