RFC: Btrfs snapshots feature for F13

[Casey Dahlin]

On 11/17/2009 02:07 PM, Jesse Keating wrote:
> 
> It also works well for people who have things like homedir backup going
> nightly, but not full system backup.  Restore to the way it was before
> the last yum update, recover important things from backup.  It's an "oh
> shit" handle that has saved my bacon on other platforms before.
> 

I'm not sure how much of this can/should be automated. From the way btrfs snapshots work the ideal workflow should be:

1) /user/ takes a snapshot.
2) user runs yum
3) rebooting/poking/(possibly) restoring

I think the best value add to this would be a yum plugin that simply emits a warning along the lines of "Your last snapshot is ### hours old. Are you sure you want to continue?"

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?)

--CJD