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 > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
