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Date: Wed, 3 Dec 2008 19:59:16 +0100
From: Patrick =?ISO-8859-15?Q?Lamaizi=E8re?= <patfbsd@davenulle.org>
To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Best Journaling File System - ZFS/???
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Le Wed, 3 Dec 2008 15:21:19 +0100 (CET),
Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> a écrit :

> >>> I use gjournal since FreeBSD 7.0 and it seems to work fine.
> >> is it really smart enough to not write everything twice or am i
> >> wrong?
> >
> > It writes everything twice :)
> >
> > (but every journaling system has to write something twice)
> 
> there is a big difference between something (metadata, short data 
> writes and everything (like huge file data)

I don't know how Gjournal works, but it works below the filesystem (so
i think it is not aware of metadata), see
http://lists.freebsd.org/pipermail/freebsd-current/2006-June/064043.html