btrfs advice?

[Rahul Sundaram]

On 05/30/2011 10:43 AM, Michael Wiktowy wrote:
> I made the leap to a btrfs root partition for my netbook with a fresh
> install of F15.
>
> Everything seems to work fine and I have done some fair amount of
> Googling for information and come across
> https://btrfs.wiki.kernel.org/index.php/Getting_started which offers
> some great (incomplete) info but nothing Fedora specific. I have some
> questions about how to move forward to take advantage of btrfs:
>
> 1) Is there any kind of integration of btrfs with the included apps
> (For example: automatic snapshots before yum updates allowing easy
> rollbacks, deja dup backing up a btrfs snapshot so that currently
> changing data doesn't affect the backup process, a kiosk mode that
> rolls back a home directory to a known state after logout, etc.) or is
> that the next step to take advantage of all the new bells and whistles
> and F15 is just a test-btrfs-as-a-ext4-replacement release?

Read https://fedoraproject.org/wiki/Fedora_15_announcement

> 2) I see (using 'mount') that the root is btrfs along with some (what
> appear to be) subvolumes for /tmp, /var/tmp and /home yet 'btrfs
> device scan' shows no information. Does 'btrfs device scan' only scan
> unmounted devices or is this a bug?

Potentially.   Might post in their mailing list or report it in bugzilla
and check.  

[Snipped the other questions I have no idea about]

Rahul