RFC: Btrfs snapshots feature for F13

[Chris Ball]

Hi,

   > I'm not sure how much of this can/should be automated.

Sorry, not quite following -- what is the caution around automatically
creating a new snapshot before each yum transaction?  Why shouldn't it
be automated?

   > This also keeps us out of the dangerous territory that comes with
   > using non-ubiquitous FS features (your boot is on ext3, your root
   > is on btrfs, your etc is on xfs and your usr is on jfs. What do
   > you snapshot and how?)

This feature would snapshot the btrfs / only, but that doesn't matter,
because snapshots don't do anything until the user chooses to initiate
a rollback.  The user who chooses a btrfs / and a jfs /usr knows what
happens when they rollback only the btrfs filesystem.  (And we can
print a warning to make sure of that if we decide it's necessary.)

Thanks,

- Chris.
-- 
Chris Ball   <cjb at laptop.org>
One Laptop Per Child