Re: mode data=journal in ext3. Is it safe to use?

From: Daniel Pittman (daniel_at_rimspace.net)
Date: 06/17/04

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    To: linux-kernel@vger.kernel.org
Date:	Thu, 17 Jun 2004 10:51:54 +1000

    On 17 Jun 2004, Timothy Miller wrote:
    > Petter Larsen wrote:
    >
    >> Data integrity is much more important for us than speed.
    >
    > You might want to consider ReiserFS or one of the others which were
    > designed with journaling in mind. And I hope you're using RAID1 or
    > RAID5.

    I must admit, that isn't quite the response that I would have expected
    for those requirements. :)

    ReiserFS, XFS and (presumably) JFS all have considerably better
    performance than ext3, for most tasks, because they were indeed designed
    with journaling in mind.

    OTOH, ReiserFS had an extremely long period of instability, and was
    build by a group who felt that a working fsck was something you put
    together after you got the filesystem working.

    This, combined with the occasional "ReiserFS 3 ate my data" reports and
    the reluctance of the developers to adapt to the 4K kernel stacks in
    2.6.recent, would leave me hesitant to recommend it as "more
    trustworthy" than ext3.

    XFS, with the "null out data on recovery" mode, is less reliable than
    ext3, full stop. It routinely destroys data in real world situations, a
    secure, but irritating, choice.

    ext3 remains the only journaling filesystem that I would, personally,
    put any great degree of faith in, since it is still developed in a
    cautious and safe fashion, and has a focus on getting the tools to
    verify correctness in place before enabling kernel-side features.

    Obviously, your millage may vary on these topics, as presumably have
    your experiences.

    Regards,
            Daniel 

    -- 
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        -- Stephen Lea***
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