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Date:      Fri, 11 Aug 2006 15:59:19 +0200
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        Thomas Quinot <thomas@FreeBSD.ORG>
Cc:        freebsd-fs@FreeBSD.org, Craig Boston <craig@xfoil.gank.org>, freebsd-current@FreeBSD.org, freebsd-geom@FreeBSD.org
Subject:   Re: GJournal (hopefully) final patches.
Message-ID:  <20060811135919.GB48792@garage.freebsd.pl>
In-Reply-To: <20060811135426.GA56740@melamine.cuivre.fr.eu.org>
References:  <20060808195202.GA1564@garage.freebsd.pl> <20060810184702.GA8567@nowhere> <20060810192841.GA1345@garage.freebsd.pl> <20060811135426.GA56740@melamine.cuivre.fr.eu.org>

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On Fri, Aug 11, 2006 at 03:54:26PM +0200, Thomas Quinot wrote:
> * Pawel Jakub Dawidek, 2006-08-10 :
>=20
> > I also added a flag for gmirror and graid3 which says "don't
> > resynchronize components after a power failure - trust they are
> > consistent". And they are always consistent when placed below gjournal.
>=20
> That sounds a bit suprising; how does gjournal guarantee that a given
> write has been committed to the two providers of a mirror?

If the given write wasn't committed to all mirror components this
bascially means, that we had a power failure and gjournal will not be
clean, so it will be replayed or forgotten, leaving the data on mirror
in a consistent state.

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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