From: rakesh patel <patelrakeshcomp@gmail.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: RE: regarding journaling mode
Date: Tue, 7 Jul 2015 08:21:16 +0530 [thread overview]
Message-ID: <559b3eab.46f0440a.bad8e.7195@mx.google.com> (raw)
In-Reply-To: <20150707002430.GV7943@dastard>
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How metadata is committed only after data? Is there any other file system feature? Because write back mode does not preserve it?
Rakesh
-----Original Message-----
From: "Dave Chinner" <david@fromorbit.com>
Sent: 07-07-2015 05:59
To: "Rakesh Patel" <patelrakeshcomp@gmail.com>
Cc: "xfs@oss.sgi.com" <xfs@oss.sgi.com>
Subject: Re: regarding journaling mode
On Mon, Jul 06, 2015 at 11:38:32AM +0530, Rakesh Patel wrote:
> Hi,
>
> I come to know XFS is using writeback journaling mode.
Can you explain how you came to that conclusion?
> As per the
> journaling guide, writeback is unsafe which does not preserve data and
> metadata write synchronization.
What journalling guide would that be? Please quote your sources when
asking questions.
> I really want to know reason behind to choose writeback mode for journaling
> in XFS.
Metadata updates after data IO completion are used instead of
ordering data writeback operations through the journal.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2015-07-07 2:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-06 6:08 regarding journaling mode Rakesh Patel
2015-07-07 0:24 ` Dave Chinner
2015-07-07 2:51 ` rakesh patel [this message]
2015-07-09 2:43 ` rakesh patel
-- strict thread matches above, loose matches on Subject: below --
2015-07-09 4:48 Rakesh Patel
2015-07-09 8:46 ` Jan Kara
2015-07-09 11:47 ` Rakesh Patel
2015-07-09 13:32 ` Emmanuel Florac
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