From: TARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com>
To: mniederle@gmx.at
Cc: linux-btrfs@vger.kernel.org
Subject: Re: snapshots of directories
Date: Tue, 12 Jan 2010 11:19:34 +0900 [thread overview]
Message-ID: <4B4BDC36.4000304@jp.fujitsu.com> (raw)
In-Reply-To: <20100112031243.09e072b0@simplux>
In btrfs, snapshot is a clone of subvolume, not arbitrary
directory.
You specified '/root' directory and it is not subvolume,
snapshot is created for parent subvolume, root of filesystem.
Regards,
taruisi
(2010/01/12 11:12), Michael Niederle wrote:
> I try to take a snapshot of a single directory, e.g. root:
>
>> btrfsctl -s root.2010-01-12 /root
> operation complete
> Btrfs v0.19-4-gab8fb4c-dirty
>
> Then I take look what's inside the newly created snapshot:
>
>> ls -l /root.2010-01-12/
> total 0
> drwxr-xr-x 1 root root 1192 2010-01-03 20:32:12 bin
> drwxr-xr-x 1 root root 76 2009-06-25 0:40:35 boot
> drwxr-xr-x 1 root root 1756 2010-01-12 2:33:07 cmds
> drwxr-xr-x 1 root root 0 2010-01-06 12:21:46 data
> drwxr-xr-x 1 root root 4356 2010-01-12 2:07:00 dev
> drwxr-xr-x 1 root root 42 2010-01-04 12:29:45 downloads
> drwxr-xr-x 1 root root 4528 2010-01-12 2:12:12 etc
> drwxr-xr-x 1 root root 52 2010-01-11 12:57:47 home
> drwxr-xr-x 1 root root 0 2007-11-10 4:44:07 initrd
> drwxr-xr-x 1 root root 4490 2010-01-05 20:15:53 lib
> drwxr-xr-x 1 root root 124 2008-04-27 14:53:39 mnt
> drwxr-xr-x 1 root root 62 2008-01-08 0:21:58 net
> drwxr-xr-x 1 root root 0 2008-04-09 3:19:16 objects
> drwxr-xr-x 1 root root 316 2009-12-28 23:23:13 opt
> dr-xr-xr-x 1 root root 0 2007-11-10 3:35:28 proc
> drwxr-xr-x 1 root root 7676 2010-01-11 0:35:41 root
> drwxr-xr-x 1 root root 0 2010-01-12 1:56:17 save
> drwxr-xr-x 1 root root 0 2010-01-12 1:55:58 save2
> drwxr-xr-x 1 root root 3804 2010-01-06 2:36:08 sbin
> drwxr-xr-x 1 root root 0 2007-11-10 3:35:28 sys
> drwxr-xr-x 1 root root 358 2010-01-11 18:44:29 tmp
> drwxr-xr-x 1 root root 176 2009-12-29 17:08:37 usr
> drwxr-xr-x 1 root root 72 2010-01-05 20:03:00 var
>
> It seems that always a snapshot of the root is taken instead one of the
> specified directory? Is this by design?
>
> Snapshotting the root works fine, but if you take several snapshots it's a bit
> "recursive", because every new snapshot contains all previous snapshots.
>
> Greetings, Michael
> --
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next prev parent reply other threads:[~2010-01-12 2:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-12 2:12 snapshots of directories Michael Niederle
2010-01-12 2:19 ` TARUISI Hiroaki [this message]
2010-01-12 5:44 ` Adrian von Bidder
2010-01-13 19:04 ` Andrey Kuzmin
2010-01-14 0:40 ` TARUISI Hiroaki
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