| To: | Dave Chinner <david@xxxxxxxxxxxxx> |
|---|---|
| Subject: | RE: regarding journaling mode |
| From: | rakesh patel <patelrakeshcomp@xxxxxxxxx> |
| Date: | Thu, 9 Jul 2015 08:13:10 +0530 |
| Cc: | <xfs@xxxxxxxxxxx>, <xfs-owner@xxxxxxxxxxx> |
| Delivered-to: | xfs@xxxxxxxxxxx |
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| In-reply-to: | <20150707002430.GV7943@dastard> |
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How Metadata updates after data IO completion done? Write back mode does not support synchronization? Is there any other feature ?? From: Dave Chinner Sent: â07-â07-â2015 05:59 To: Rakesh Patel Cc: xfs@xxxxxxxxxxx Subject: Re: regarding journaling mode > 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@xxxxxxxxxxxxx |
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