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Re: Question: Does XFS journal data or only metadata?

To: Nathan Scott <nathans@xxxxxxx>
Subject: Re: Question: Does XFS journal data or only metadata?
From: Anders Saaby <as@xxxxxxxxxxxx>
Date: Thu, 3 Feb 2005 11:33:26 +0100
Cc: linux-xfs@xxxxxxxxxxx, Steve Lord <lord@xxxxxxx>
In-reply-to: <20050203204709.A1929258@wobbly.melbourne.sgi.com>
Organization: Cohaesio A/S
References: <200502031005.57621.as@cohaesio.com> <20050203204709.A1929258@wobbly.melbourne.sgi.com>
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Thank you for your fast reply!

On Thursday 03 February 2005 10:47, Nathan Scott wrote:
> >
> > Does XFS journal everything (data and metadata) or only metadata?
>
> Only metadata.

OK

> > Are we able to move an internal log to external log on an existing
> > filesystem? (xfs_growfs has an option for it "-x", but the man page says
> > it is "not implemented") - If this is not implemented, do we have
> > alternative measures for creating an external log on an existing
> > filesystem?
>
> Its not implemented.  It would be quite straightforward to do
> offline (I remember Steve sent mail about an unsupported way to
> do this a few years ago) - could be done through xfs_db.  It's
> really not a difficult extension to xfs_db if you want to try
> coding it.
>
> Online would be more involved, though could be done (probably
> via xfs_freeze, then xfs_growfs-x+<new code>, then thaw).

OK - An offline solution is fine with me, but I cannot find Steve's mail 
(Haven't been subscribed to this list that long).

- Steve, Is this still an option with present XFS implementation? - And can 
you maybe elaborate a bit on how to do it? :)


-- 
Med venlig hilsen - Best regards - Meilleures salutations

Anders Saaby
Systems Engineer
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Cohaesio A/S - Maglebjergvej 5D - DK-2800 Lyngby
Phone: +45 45 880 888 - Fax: +45 45 880 777
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