Re: regarding journaling mode

Dave Chinner
2015-07-07T00:29:56Z

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