I am still trying to understand the default / btrfs setup on SUSE:
root@trulla:/# lsb_release -d
Description: SUSE Linux Enterprise Server 12 SP3
root@trulla:/# btrfs subvolume list -uq /
ID 257 gen 2273953 top level 5 parent_uuid - uuid
294f484f-7ac6-ac4d-8b8b-953b377a3880 path @
ID 258 gen 2273926 top level 257 parent_uuid - uuid
99be1ca4-d2af-2b47-b307-bf4c3f1be827 path @/home
ID 259 gen 2273951 top level 257 parent_uuid - uuid
b46984a3-7cac-f240-b007-be36fd6db242 path @/opt
ID 260 gen 2273926 top level 257 parent_uuid - uuid
885fc07c-5590-184a-a4cf-85c6afb75412 path @/srv
ID 261 gen 2273961 top level 257 parent_uuid - uuid
1e6d55c2-0486-a742-a9d3-fc4f105d6508 path @/tmp
ID 262 gen 2273926 top level 257 parent_uuid - uuid
72ce86ca-eec5-e843-a25b-79a09a30ca2d path @/usr/local
ID 263 gen 2273953 top level 257 parent_uuid - uuid
8d20fda0-94bc-1442-9640-d12daac5c609 path @/var/crash
ID 264 gen 2273954 top level 257 parent_uuid - uuid
d1d833fa-c4a1-994f-9db5-23a853a0573f path @/var/log
ID 265 gen 2273953 top level 257 parent_uuid - uuid
b98cc10f-a0cc-f34a-9b25-921131c0388c path @/var/opt
ID 266 gen 2273960 top level 257 parent_uuid - uuid
da8cc066-b3a3-3941-b6f8-7a29f73fd673 path @/var/spool
ID 267 gen 2273953 top level 257 parent_uuid - uuid
5d791fa4-0b5f-f748-aff2-0944cb58c51d path @/var/tmp
ID 270 gen 2272607 top level 257 parent_uuid - uuid
bbef7f0f-1270-9a43-89ca-b4f909968f87 path @/.snapshots
ID 453 gen 2273960 top level 270 parent_uuid
d2f6c896-ff9a-2f4c-b60f-7d0e20ab834c uuid c85dc50a-b126-1441-bddd-2832afac58d2
path @/.snapshots/128/snapshot
ID 12392 gen 2123118 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid aa3b38f3-e536-424d-ab58-b82fba646f9f
path @/.snapshots/1065/snapshot
ID 12393 gen 2123120 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 76cc605b-49a3-cc43-8557-8d0b2cb2d5ec
path @/.snapshots/1066/snapshot
ID 13273 gen 2176640 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid fc4ef295-4566-084f-a570-ab918a134c4e
path @/.snapshots/1089/snapshot
ID 13274 gen 2176651 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid b1cb09a9-8df6-2d41-9e97-564699e88029
path @/.snapshots/1090/snapshot
ID 13553 gen 2203681 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 9d6607df-bb48-9e46-842d-cacc23fd74b5
path @/.snapshots/1103/snapshot
ID 13554 gen 2203681 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 0fcc5335-3324-7144-84d4-a3cc0327be83
path @/.snapshots/1104/snapshot
ID 13581 gen 2203681 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 212faa53-56ba-4343-83ae-3a4c35ee5620
path @/.snapshots/1107/snapshot
ID 13582 gen 2203681 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 6be47a20-d8cf-cc48-81e3-c8b55c7e07bd
path @/.snapshots/1108/snapshot
ID 14395 gen 2256089 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid b900b1f6-e8fc-444a-be5f-424fde9ed3a6
path @/.snapshots/1127/snapshot
ID 14396 gen 2256089 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 3e9b136b-3b17-b04b-bbca-7f9220f6aafd
path @/.snapshots/1128/snapshot
ID 14498 gen 2256089 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 743746ec-2351-c54f-a242-07753b28a3bf
path @/.snapshots/1131/snapshot
ID 14499 gen 2256089 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 81c976f5-d809-6d43-b987-a6cdfca3858a
path @/.snapshots/1132/snapshot
ID 14500 gen 2266578 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 517a128f-45eb-f94e-8f74-09eb46c11d40
path @/.snapshots/1133/snapshot
ID 14501 gen 2266578 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 68bcda1c-6443-2946-bde7-fc1e71a86b41
path @/.snapshots/1134/snapshot
ID 14525 gen 2266578 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 7aa0cfc8-1537-8046-a623-57c19afad137
path @/.snapshots/1135/snapshot
ID 14526 gen 2266578 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid e82b77b9-5b26-de41-a146-6beb183b659f
path @/.snapshots/1136/snapshot
ID 14772 gen 2266672 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 8aa29fc4-9316-254a-9011-6d367bda2d1b
path @/.snapshots/1137/snapshot
ID 14773 gen 2266674 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 7b99efcb-86e2-344f-8342-88c94f29de2a
path @/.snapshots/1138/snapshot
ID 14793 gen 2267857 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid ef9863a4-ff82-c947-8147-a9fa492335f8
path @/.snapshots/1139/snapshot
ID 14794 gen 2267862 top level 270 parent_uuid
c85dc50a-b126-1441-bddd-2832afac58d2 uuid 3dc9f4b7-cd4c-3040-9733-da633abd37f6
path @/.snapshots/1140/snapshot
root@trulla:/# mount -o subvol=/ /dev/sda2 /mnt/_
root@trulla:/# btrfs subvolume show /mnt/_
/mnt/_ is toplevel subvolume
root@trulla:/# ll /mnt/_/
drwxr-xr-x root root - 2019-07-08 09:53:23 /mnt/_/@
subvol=/ contains only one subdirectory named @ with everything inside:
root@trulla:/# du -s /mnt/_/@/*
5156 /mnt/_/@/bin
21056 /mnt/_/@/boot
3156 /mnt/_/@/busybox
0 /mnt/_/@/dev
14096 /mnt/_/@/etc
32 /mnt/_/@/home
188388 /mnt/_/@/lib
14828 /mnt/_/@/lib64
0 /mnt/_/@/mnt
1679808 /mnt/_/@/opt
0 /mnt/_/@/proc
464 /mnt/_/@/root
0 /mnt/_/@/run
10540 /mnt/_/@/sbin
0 /mnt/_/@/selinux
0 /mnt/_/@/srv
0 /mnt/_/@/sys
8 /mnt/_/@/tmp
1320328 /mnt/_/@/usr
572796 /mnt/_/@/var
root@trulla:/# btrfs subvolume get-default /
ID 453 gen 2273956 top level 270 path @/.snapshots/128/snapshot
root@trulla:/# btrfs subvolume show / | grep UUID
UUID: c85dc50a-b126-1441-bddd-2832afac58d2
Parent UUID: d2f6c896-ff9a-2f4c-b60f-7d0e20ab834c
parent_uuid d2f6c896-ff9a-2f4c-b60f-7d0e20ab834c uuid
c85dc50a-b126-1441-bddd-2832afac58d2 path @/.snapshots/128/snapshot
All (snapper) snapshots have @/.snapshots/128/snapshot as parent which is
the default / subvolme
But what/where is subvolume with UUID d2f6c896-ff9a-2f4c-b60f-7d0e20ab834c?
Was it the installation subvolume which has been deleted afterwards?
The subvolume @ is not default mounted - why?
It uses disk space (/lib /lib64 ...) but it does not get updated?
root@trulla:/# l -Rrt /mnt/_/@/lib/ | grep -v ^d|tail -3
-RW- 573,168 2015-09-24 12:16
/mnt/_/@/lib/modules/3.12.44-52.18-default/modules.alias.bin
-RW- 603,413 2015-09-24 12:16
/mnt/_/@/lib/modules/3.12.44-52.18-default/modules.alias
l--- - 2015-09-24 12:16
/mnt/_/@/lib/modules/3.12.44-52.18-default/weak-updates/updates/crash.ko ->
/lib/modules/3.12.28-4-default/updates/crash.ko
root@trulla:/# l -Rrt /lib/ | grep -v ^d|tail -3
-RW- 680,805 2019-06-18 11:42
/lib/modules/4.4.180-94.97-default/modules.alias.bin
-RW- 723,956 2019-06-18 11:42
/lib/modules/4.4.180-94.97-default/modules.alias
lRW- - 2019-06-18 11:42
/lib/modules/4.4.180-94.97-default/weak-updates/updates/crash.ko ->
/lib/modules/4.4.175-94.79-default/updates/crash.ko
So, it uses disk space, which cannot be freed?
--
Ullrich Horlacher Server und Virtualisierung
Rechenzentrum TIK
Universitaet Stuttgart E-Mail: horlac...@tik.uni-stuttgart.de
Allmandring 30a Tel: ++49-711-68565868
70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/
REF:<20190708084821.gb15...@tik.uni-stuttgart.de>
