Hi, > * create snapshot > * mount it somewhere (read-write) > * operate on the snapshot, change some files etc... > * revert changes made to the snapshot to its original state
Make two snapshots instead of one, and only modify one of them? Because of CoW, new snapshots have very low overhead. > with or without unmounting it. You would have to unmount it if it had any open files. > If not, is there any filesystem that can do that ? I don't know of any filesystem that lets you discard changes to a snapshot, but I've just described a method for doing so where you always make a read-only -pristine version of that snapshot and have tools that base your read-write snapshots on that. I don't think it would be possible for any filesystem to handle changing snapshot on a mounted filesystem with files open, so it makes sense that it's a remount operation. - Chris. -- Chris Ball <c...@laptop.org> One Laptop Per Child -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
