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From: Gionatan Danti <g.danti@assyoma.it>
To: linux-xfs@vger.kernel.org
Cc: g.danti@assyoma.it
Subject: Reflink (cow) copy of busy files
Date: Sat, 24 Feb 2018 19:20:48 +0100	[thread overview]
Message-ID: <9e69fcd01e1c02ea53e0e1ac66d60d24@assyoma.it> (raw)

Hi all,
I have a question on how CoW/reflink works when used on busy files, as 
vm image files, databases, ecc.

In short: can reflink-copy be used to create a crash-consistent snapshot 
of, say, a busy vm disk file? Or the db/vm/whatever should be quiesced 
before taking the copy (ie: similarly to how lvm call fsfreeze during 
the snapshot)?

Thanks.

-- 
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti@assyoma.it - info@assyoma.it
GPG public key ID: FF5F32A8

             reply	other threads:[~2018-02-24 18:26 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-24 18:20 Gionatan Danti [this message]
2018-02-24 22:07 ` Reflink (cow) copy of busy files Dave Chinner
2018-02-24 22:57   ` Gionatan Danti
2018-02-25  2:47     ` Dave Chinner
2018-02-25 11:40       ` Gionatan Danti
2018-02-25 21:13         ` Dave Chinner
2018-02-25 21:58           ` Gionatan Danti
2018-02-26  0:25             ` Dave Chinner
2018-02-26  7:19               ` Gionatan Danti
2018-02-26  7:58                 ` Amir Goldstein
2018-02-26  8:26                   ` Gionatan Danti
2018-02-26 17:26                     ` Darrick J. Wong
2018-02-26 21:23                       ` Gionatan Danti
2018-02-26 21:31                         ` Darrick J. Wong
2018-02-26 21:39                           ` Gionatan Danti
2018-02-27  0:33                       ` Dave Chinner
2018-02-27  0:58                         ` Darrick J. Wong
2018-02-27  8:06                         ` Gionatan Danti
2018-02-27 22:04                           ` Dave Chinner
2018-02-28  7:08                             ` Gionatan Danti
2018-02-28 17:07                               ` Darrick J. Wong
2018-02-28 18:27                                 ` Gionatan Danti
2018-02-26 20:29                     ` Amir Goldstein
2018-02-26 21:28                       ` Gionatan Danti

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