On Fri, Dec 25, 2020 at 11:27 AM Sreyan Chakravarty <sreya...@gmail.com> wrote:
>
> Let me ask you how will snapshotting and restoration work with nested sub 
> volumes?

They have to be moved into the new position following the rollback.
This could be done either with a literal 'mv' or you could just
snapshot the old location to new location, then delete the snapshot
from the old location.

> Let's say I snapshot my root subvolume which contains a subvolume which 
> contains my VM images.

The snapshot will stop at the nested subvolume boundary, i.e. it will
not be included.

> What will happen to this volume when I restore my root snapshot?

The rolled back root subvolume will have an empty directory matching
the name of the nested subvolume.


-- 
Chris Murphy
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