ZFS usage in web interface not the same as "zpool list"

buco

Member
Feb 22, 2023
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I noticed in the web interface of our (replicated) ZFS pool, it is at 80%. I was a bit surprised, so I looked at zpool list and zfs list. It's not immediately clear to my what is causing this.

So at first sight, I'd say: "fine!", based on the output of zpool list.

Bash:
root@pve2:/localdata-pve1# zpool list
NAME             SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
localdata-pve1  9.09T  1.02T  8.07T        -         -     4%    11%  1.00x    ONLINE  -
root@pve2:/localdata-pve1#


Here's a more in depth view.

(note: the naming on the zpool is confusing to say the least. I set it up on our first host, then wanted to replicate it to pve2. Since they've got to have the same name, ... Yeah sorry )
Bash:
root@pve2:/localdata-pve1# zfs list -o space
NAME                                                                                    AVAIL   USED  USEDSNAP  USEDDS  USEDREFRESERV  USEDCHILD
localdata-pve1                                                                          1.55T  6.41T        0B    171K             0B      6.41T
localdata-pve1/vm-100-disk-0                                                            2.10T   748G     22.5M    183G           564G         0B
localdata-pve1/vm-100-disk-0@__replicate_100-0_1712750414__                                 -  22.5M         -       -              -          -
localdata-pve1/vm-102-disk-0                                                            1.75T   221G     4.39G   14.2G           202G         0B
localdata-pve1/vm-102-disk-0@PXE-boot-menu                                                  -  99.5K         -       -              -          -
localdata-pve1/vm-102-disk-0@OS-installed                                                   -  8.59M         -       -              -          -
localdata-pve1/vm-102-disk-0@OS-booted                                                      -  1.90M         -       -              -          -
localdata-pve1/vm-102-disk-0@first-3-roles-from-playbook                                    -  63.0M         -       -              -          -
localdata-pve1/vm-102-disk-0@two-more-roles--afs-rwho                                       -   132M         -       -              -          -
localdata-pve1/vm-102-disk-0@qemu-guest-agent-started                                       -  1.15G         -       -              -          -
localdata-pve1/vm-102-disk-0@__replicate_102-0_1712753103__                                 -  7.43M         -       -              -          -
localdata-pve1/vm-102-state-OS-booted                                                   1.58T  28.0G        0B    406M          27.6G         0B
localdata-pve1/vm-102-state-OS-booted@__replicate_102-0_1712753103__                        -     0B         -       -              -          -
localdata-pve1/vm-102-state-PXE-boot-menu                                               1.58T  27.7G        0B   22.6M          27.6G         0B
localdata-pve1/vm-102-state-PXE-boot-menu@__replicate_102-0_1712753103__                    -     0B         -       -              -          -
localdata-pve1/vm-102-state-first-3-roles-from-playbook                                 1.58T  32.1G        0B   4.48G          27.6G         0B
localdata-pve1/vm-102-state-first-3-roles-from-playbook@__replicate_102-0_1712753103__      -     0B         -       -              -          -
localdata-pve1/vm-102-state-qemu-guest-agent-started                                    1.58T  29.0G        0B   1.38G          27.6G         0B
localdata-pve1/vm-102-state-qemu-guest-agent-started@__replicate_102-0_1712753103__         -     0B         -       -              -          -
localdata-pve1/vm-102-state-two-more-roles--afs-rwho                                    1.58T  29.4G        0B   1.77G          27.6G         0B
localdata-pve1/vm-102-state-two-more-roles--afs-rwho@__replicate_102-0_1712753103__         -     0B         -       -              -          -
localdata-pve1/vm-103-disk-0                                                            2.21T   900G     4.76G    221G           674G         0B
localdata-pve1/vm-103-disk-0@network-ok                                                     -  1.03G         -       -              -          -
localdata-pve1/vm-103-disk-0@dns-fixed                                                      -  8.32M         -       -              -          -
localdata-pve1/vm-103-disk-0@ready-to-start-migrating                                       -  11.1M         -       -              -          -
localdata-pve1/vm-103-disk-0@before-first-login-attempt                                     -  2.31G         -       -              -          -
localdata-pve1/vm-103-disk-0@__replicate_103-0_1712753129__                                 -  18.8M         -       -              -          -
localdata-pve1/vm-103-state-before-first-login-attempt                                  1.57T  31.4G        0B   9.38G          22.0G         0B
localdata-pve1/vm-103-state-before-first-login-attempt@__replicate_103-0_1712753129__       -     0B         -       -              -          -
localdata-pve1/vm-103-state-dns-fixed                                                   1.57T  29.3G        0B   7.34G          22.0G         0B
localdata-pve1/vm-103-state-dns-fixed@__replicate_103-0_1712753129__                        -     0B         -       -              -          -
localdata-pve1/vm-103-state-network-ok                                                  1.57T  23.8G        0B   1.85G          22.0G         0B
localdata-pve1/vm-103-state-network-ok@__replicate_103-0_1712753129__                       -     0B         -       -              -          -
localdata-pve1/vm-103-state-ready-to-start-migrating                                    1.57T  28.9G        0B   6.95G          22.0G         0B
localdata-pve1/vm-103-state-ready-to-start-migrating@__replicate_103-0_1712753129__         -     0B         -       -              -          -
localdata-pve1/vm-104-disk-0                                                            1.64T   150G     31.5G   27.9G          90.4G         0B
localdata-pve1/vm-104-disk-0@before_systemctl                                               -  15.1G         -       -              -          -
localdata-pve1/vm-104-disk-0@before-apt-upgrade                                             -  13.1G         -       -              -          -
localdata-pve1/vm-104-disk-0@__replicate_104-0_1712753153__                                 -  12.9M         -       -              -          -
localdata-pve1/vm-104-disk-1                                                            1.99T   807G     76.9G    278G           452G         0B
localdata-pve1/vm-104-disk-1@before_systemctl                                               -  42.8G         -       -              -          -
localdata-pve1/vm-104-disk-1@before-apt-upgrade                                             -  34.0G         -       -              -          -
localdata-pve1/vm-104-disk-1@__replicate_104-0_1712753153__                                 -  65.2M         -       -              -          -
localdata-pve1/vm-104-state-before-apt-upgrade                                          1.56T  13.9G        0B   2.43G          11.5G         0B
localdata-pve1/vm-104-state-before-apt-upgrade@__replicate_104-0_1712753153__               -     0B         -       -              -          -
localdata-pve1/vm-104-state-before_systemctl                                            1.56T  10.2G        0B   2.09G          8.12G         0B
localdata-pve1/vm-104-state-before_systemctl@__replicate_104-0_1712753153__                 -     0B         -       -              -          -
localdata-pve1/vm-105-disk-0                                                            1.61T  72.0G      654K   4.58G          67.5G         0B
localdata-pve1/vm-105-disk-0@__replicate_105-0_1712753170__                                 -   654K         -       -              -          -
localdata-pve1/vm-106-disk-0                                                            1.59T  46.6G     8.07M   3.42G          43.2G         0B
localdata-pve1/vm-106-disk-0@__replicate_106-0_1712750402__                                 -  8.07M         -       -              -          -
localdata-pve1/vm-106-disk-1                                                            2.90T  1.35T      171K   19.6M          1.35T         0B
localdata-pve1/vm-106-disk-1@__replicate_106-0_1712750402__                                 -   171K         -       -              -          -
localdata-pve1/vm-107-disk-0                                                            1.61T  66.4G     3.69M   8.54G          57.9G         0B
localdata-pve1/vm-107-disk-0@__replicate_107-0_1712753177__                                 -  3.69M         -       -              -          -
localdata-pve1/vm-107-disk-1                                                            3.36T  1.84T        0B   33.0G          1.81T         0B
localdata-pve1/vm-107-disk-1@__replicate_107-0_1712753177__                                 -     0B         -       -              -          -
root@pve2:/localdata-pve1#

EDIT: Additional info: If I go to the web UI Folder View > Storage > ZFS pool > VM disks and add up the size of all the disks, I get close to 50% of the reported disk space in the web interface. That could make sense since all VMs are replicated.
 
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