Disk Usage Exceeds Disk Capacity

English Install/Boot/Login
#1

Hello guys, I am so confused by the disk usage issue.

Here I use docker system df to show the amount of disk space used by the docker, and you can see that docker only uses 6.2GB disk space:

TYPE            TOTAL     ACTIVE    SIZE      RECLAIMABLE
Images          1         0         6.21GB    6.21GB (100%)
Containers      0         0         0B        0B
Local Volumes   0         0         0B        0B
Build Cache     0         0         0B        0B

But when I use sudo btrfs filesystem du -s /var/lib/docker/ to show the disk usage, I get the following result:

     Total   Exclusive  Set shared  Filename
 127.16GiB    52.29MiB     5.77GiB  /var/lib/docker/

And this 127.16GB actually exceeds my disk capacity allocated for openSUSE, which is 75GB. And the result of sudo btrfs filesystem show is as follows:

Label: 'openSUSE'  uuid: bb51d104-2db0-4965-8f2a-057d8f684dab
        Total devices 1 FS bytes used 22.30GiB
        devid    1 size 75.00GiB used 30.07GiB path /dev/nvme0n1p5

Label: none  uuid: 76ba0f42-c83c-4b7a-9797-c040abbd458b
        Total devices 1 FS bytes used 15.66GiB
        devid    1 size 96.00GiB used 18.02GiB path /dev/nvme1n1p2

But my system does not crash and can be normally used. So what is going wrong here? What is actually disk usage?

#2

As shown by Set shared. Total shows logical size and Set shared physical size.

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