Re: snapshots of directories

[TARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com>]

Yes. I mean that.
In detail, 'non subvolume directory' may be more precise
than 'arbitrary directory'.

Thanks for your description.

Regards,
taruisi

(2010/01/14 4:04), Andrey Kuzmin wrote:
> Did I get you right in that btrfs does not support snapshots of an
> arbitrary directory?
> 
> Regards,
> Andrey
> 
> 
> 
> 
> On Tue, Jan 12, 2010 at 5:19 AM, TARUISI Hiroaki
> <taruishi.hiroak@jp.fujitsu.com> wrote:
>> 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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-- 
taruisi