On Sat 2019-07-06 (19:57), Nikolay Borisov wrote:
> > And how can I see whether /test/tmp/xx/ss1 is a snapshot at all?
> > Do all snapshots have a "Parent UUID" and regular subvolumes not?
>
> Indeed, only snapshots have a Parent UUID.
Not all:
root@xerus:/test# btrfs subvolume snapshot -r /test /test/ss1
Create a readonly snapshot of '/test' in '/test/ss1'
root@xerus:/test# btrfs subvolume show /test/ss1
/test/ss1
Name: ss1
UUID: 02bd07bc-0bab-3442-96be-40790e1ba9be
Parent UUID: -
Received UUID: -
Creation time: 2019-07-06 22:37:37 +0200
Subvolume ID: 1036
Generation: 9824
Gen at creation: 9824
Parent ID: 5
Top level ID: 5
Flags: readonly
Snapshot(s):
root@xerus:/test# btrfs subvolume show /test
/test is toplevel subvolume
--
Ullrich Horlacher Server und Virtualisierung
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Universitaet Stuttgart E-Mail: horlacher@xxxxxxxxxxxxxxxxxxxx
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