From: Michael Monnerie <michael.monnerie@is.it-management.at>
To: xfs@oss.sgi.com
Subject: Re: xfs mount/create options (was: XFS status update for August 2010)
Date: Thu, 9 Sep 2010 01:30:15 +0200 [thread overview]
Message-ID: <201009090130.22983@zmi.at> (raw)
In-Reply-To: <20100908145148.GB705@dastard>
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On Mittwoch, 8. September 2010 Dave Chinner wrote:
> Dynamically changing the RAID array geometry is a Bad Idea. Yes,
> you can do it, but if you've got a filesystem full of data and
> metadata aligned to the old geometry then after the modification
> it won't be aligned anymore.
>
> If you want to do this, then either don't bother about geomtry hints
> in the first place, or dump, rebuild the array, mkfs and restore so
> everything is properly aligned with the new world order. Hell,
> dump/mkfs/restore might even be faster than reshaping a large
> array...
You're right. But there are some customers who don't want to spend the
money for a 2nd array, and can't afford the downtime of backup, rebuild
raid (takes 8-48 hours), restore. So an online upgrade is needed. We're
not in an ideal world.
--
mit freundlichen Grüssen,
Michael Monnerie, Ing. BSc
it-management Internet Services
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next prev parent reply other threads:[~2010-09-08 23:29 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-02 14:59 XFS status update for August 2010 Christoph Hellwig
2010-09-02 14:59 ` Christoph Hellwig
2010-09-05 7:44 ` Willy Tarreau
2010-09-05 7:44 ` Willy Tarreau
2010-09-05 9:37 ` Michael Monnerie
2010-09-05 10:47 ` Willy Tarreau
2010-09-05 13:08 ` Dave Chinner
2010-09-05 18:56 ` Willy Tarreau
2010-09-05 23:36 ` Dave Chinner
2010-09-06 5:19 ` Willy Tarreau
2010-09-06 5:49 ` xfs mount/create options (was: XFS status update for August 2010) Michael Monnerie
2010-09-08 5:38 ` Michael Monnerie
2010-09-08 10:58 ` Dave Chinner
2010-09-08 13:38 ` Michael Monnerie
2010-09-08 14:51 ` Dave Chinner
2010-09-08 15:24 ` Emmanuel Florac
2010-09-08 23:34 ` Michael Monnerie
2010-09-08 23:30 ` Michael Monnerie [this message]
2010-09-09 7:27 ` Dave Chinner
2010-09-09 8:29 ` Michael Monnerie
2010-09-06 3:22 ` XFS status update for August 2010 Eric Sandeen
2010-09-06 5:10 ` Michael Monnerie
2010-09-06 22:55 xfs mount/create options (was: XFS status update for August 2010) Richard Scobie
2010-09-06 23:31 ` Michael Monnerie
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