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Date: Mon, 27 Oct 2008 17:01:01 +0100
From: Miroslav Lachman <000.fbsd@quip.cz>
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Subject: Re: journaling filesystem
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Oliver Fromme wrote:
> martinko <gamato@users.sf.net> wrote:
>  > Rong-en Fan wrote:
>  > > In NetBSD, they now have metadata journaling support, see
>  > > 
>  > > http://www.netbsd.org/changes/#wapbl
>  > > 
>  > > I'm not a fs guru, I just want to know what are the status of
>  > > BluFFS and UFS journaling support which were mentioned
>  > > in recent years.
>  > 
>  > This is very interesting!  I can imagine this would be the way for 
>  > systems where ZFS is not an option but SU are reaching their limits.
> 
> Have you had a look at gjournal(8)?

I played with a gjournal, it is simple and working, but not usable where 
performance matters. A write performance is degraded to about half of a 
performance without gjournal (with a gjournal on top of a gmirror it is 
even more slower)

Miroslav Lachman