[Btrfs-users] Thoughts about filesystem undo

[Chris Samuel]

On Wed, 26 Sep 2007, Phil Endecott wrote:

> I have various other half-baked ideas, but I'll wait and see if you
> have any thoughts to share before continuing.

NILFS v2 has a slightly different take on this in that it has a daemon 
which starts on mount and then makes periodic checkpoints of the 
filesystem which eventually expire & get garbage collected (both 
times are configurable).

At any point prior to expiry the user can convert a checkpoint into a 
snapshot which is permanent, or revert a snapshot back to a 
checkpoint for garbage collection.  Snapshots can be mounted as read 
only filesystems.

The user can also take a snapshot on demand, of course.

cheers!
Chris
-- 
 Chris Samuel  :  http://www.csamuel.org/  :  Melbourne, VIC

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