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Date:      Mon, 21 Aug 2023 14:51:03 +0100
From:      Kaya Saman <kayasaman@optiplex-networks.com>
To:        questions@freebsd.org
Subject:   Re: ZFS Root size keeps going down after upgrade to 13.2-release
Message-ID:  <46f0c9a4-b21a-8ed0-150b-285459101363@optiplex-networks.com>
In-Reply-To: <9d07a668-c876-2295-8234-95d1f9d5f5c2@wp.pl>
References:  <8f3b445d-3f55-f359-ce5e-0d86c57755fe@optiplex-networks.com> <20230821130132.50aeb96b51b2b71efa14cb94@sohara.org> <8dbe0d99-ca94-998d-0c4e-27642db1b11a@optiplex-networks.com> <362941E9-C354-4325-A691-6DC44E5F5AB6@vanderzwan.org> <ff0c28e6-154e-ca74-e8f0-1f36019f8617@optiplex-networks.com> <0178E106-F136-44F6-BB36-D94ABEE4BEDE@vanderzwan.org> <3caba337-1d4c-4555-d3ba-7d36278a4c9b@optiplex-networks.com> <0E0B068F-C160-445F-BCED-828694122C8C@vanderzwan.org> <f3894f18-2338-a8ee-65f0-5d53ef181993@optiplex-networks.com> <9d07a668-c876-2295-8234-95d1f9d5f5c2@wp.pl>

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On 8/21/23 14:44, Ireneusz Pluta/wp.pl wrote:
>
> W dniu 21.08.2023 o=C2=A015:41, Kaya Saman pisze:
>> It shows a 52GB 'claimed' snapshot but where is it?=20
> at "-o refer"


Here is the output using the 'refer' switch:

zfs list -r -t all -o space,refer zroot/ROOT/default
NAME=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 AVAIL=C2=A0=C2=A0 USED=C2=A0 USEDSNAP USEDDS=C2=A0=20
USEDREFRESERV=C2=A0 USEDCHILD=C2=A0=C2=A0=C2=A0=C2=A0 REFER
zroot/ROOT/default=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 720M=C2=A0 88.5G=C2=A0=C2=A0=C2=A0=C2=A0 52.0G=20
36.5G=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 0B=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 0B=C2=A0=C2=A0=C2=A0=
=C2=A0 36.5G
zroot/ROOT/default@2022-11-28-06:08:26-0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=
=A0=C2=A0 583M -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=20
-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=A0=C2=
=A0=C2=A0=C2=A0 63.2G
zroot/ROOT/default@2022-11-28-06:38:48-0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=
=A0 11.4M -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=20
-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=A0=C2=
=A0=C2=A0=C2=A0 63.1G
zroot/ROOT/default@2022-11-28-07:26:20-0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=
=A0 9.41M -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=20
-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=A0=C2=
=A0=C2=A0=C2=A0 63.2G
zroot/ROOT/default@2023-08-20-22:00:10-0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=
=A0 34.5M -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=20
-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=A0=C2=
=A0=C2=A0=C2=A0 78.2G
zroot/ROOT/default@2023-08-20-22:45:34-0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=
=A0 9.56M -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=20
-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -=C2=A0=C2=
=A0=C2=A0=C2=A0 78.3G


I still don't understand how to free this space up? I could delete the=20
snapshots dated from 2022 but will that clean anything from the=20
filesystem itself? Or will it just free up the few MB under the=20
'USEDSNAP' heading?




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