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Re: BTRFS file clone support for cp
From: |
Giuseppe Scrivano |
Subject: |
Re: BTRFS file clone support for cp |
Date: |
Tue, 28 Jul 2009 22:06:35 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.96 (gnu/linux) |
Hi Pádraig,
Pádraig Brady <address@hidden> writes:
> How different exactly?
> OK I tried this myself on F11 with inconclusive results.
I can't replicate it now, all tests I am doing report that blocks used
before and after the clone are the same. Probably yesterday the
difference I noticed was in reality the original file flushed to the
disk.
> The above suggests that the clone does actually allocate space
> but btrfs isn't reporting it through statvfs correctly?
The same message appeared here too some days ago, though I cloned only
few Kb files, not much to fill the entire partition.
> If the clone does allocate space, then how can one
> clone without allocation which could be very useful
> for snapshotting for example?
I don't know if snapshotting is handled in the same way as a "clone",
but in this case it seems more obvious to me that no additional space
should be reported.
> Also I tried the above twice and both times got:
> http://www.kerneloops.org/submitresult.php?number=578993
I didn't get these errors. I am using the btrfs git version.
Regards,
Giuseppe
- Re: BTRFS file clone support for cp, (continued)
- Re: BTRFS file clone support for cp, Giuseppe Scrivano, 2009/07/26
- Re: BTRFS file clone support for cp, Jim Meyering, 2009/07/27
- Re: BTRFS file clone support for cp, Andreas Schwab, 2009/07/27
- Re: BTRFS file clone support for cp, Jim Meyering, 2009/07/28
- Re: BTRFS file clone support for cp, Jim Meyering, 2009/07/29
- Re: BTRFS file clone support for cp, Jim Meyering, 2009/07/29
Re: BTRFS file clone support for cp, Pádraig Brady, 2009/07/26
- Re: BTRFS file clone support for cp, Jim Meyering, 2009/07/27
- Re: BTRFS file clone support for cp, Giuseppe Scrivano, 2009/07/27
- Re: BTRFS file clone support for cp, Pádraig Brady, 2009/07/27
- Re: BTRFS file clone support for cp,
Giuseppe Scrivano <=
- Re: BTRFS file clone support for cp, Chris Mason, 2009/07/29
- Re: BTRFS file clone support for cp, Pádraig Brady, 2009/07/29
- Re: BTRFS file clone support for cp, Chris Mason, 2009/07/29
- Re: BTRFS file clone support for cp, Pádraig Brady, 2009/07/29
- Re: BTRFS file clone support for cp, Joel Becker, 2009/07/30
- Re: BTRFS file clone support for cp, Jim Meyering, 2009/07/30
- Re: BTRFS file clone support for cp, Joel Becker, 2009/07/30
- Re: BTRFS file clone support for cp, Pádraig Brady, 2009/07/30
- Re: BTRFS file clone support for cp, Ric Wheeler, 2009/07/30
- Re: BTRFS file clone support for cp, Jim Meyering, 2009/07/30