Installing a system to use both gjournal and gmirror

Adam Vande More amvandemore at
Sat Jul 31 13:54:41 UTC 2010

On Sat, Jul 31, 2010 at 4:38 AM, <perryh at> wrote:

> I've read the Handbook sections on gmirror and gjournal, and the
> gjournal-desktop article, and I'm still unclear on how to go about
> setting up a configuration that uses both.
> * Since I haven't started the installation -- thus the partitions
>  haven't even been created yet -- it seems as if it "should" be
>  possible to put the journals in the same partitions with the data.
> * Since I can't mirror or journal a FAT32 slice AFAIK,

You can do both to it, it just won't be able to handle the journal.
Mirroring is just fine.  GEOM stuff works at the block level making it
filesystem independant.

> and there
>  seems little point in mirroring swap or /tmp, I think I want to
>  end up with something along the lines of (on identical drives ad0
>  and ad2):

While you are correct there isn't much point in mirroring swap and tmp,
there also isn't much point in trying to save the space either.  It's not
very much relatively and if you use it for something else you impact the
performance of your disks.

Adam Vande More

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