hard usage is going up by time

[peiman]

hello
i installed an ubuntu 18.04.3

this is hard usage from master machine is

root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8713797632 Oct 27 18:02 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8715894784 Oct 27 18:02 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8717991936 Oct 27 18:02 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8720089088 Oct 27 18:02 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8722186240 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8722186240 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8724283392 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8726380544 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8728477696 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8730574848 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8730574848 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r--r-- 1 root root 5096931328 Oct 27 17:55 1.vmdk
-rw-r----- 1 root root 8734769152 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8735555584 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101# ls -l
-rw-r----- 1 root root 8738963456 Oct 27 18:03 vm-101-disk-0.vmdk
root@m3784:/var/lib/vz/images/101#

the hard usage from inside the vm is

peiman@digidoc:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            3.9G     0  3.9G   0% /dev
tmpfs           798M  956K  797M   1% /run
/dev/sda2       629G  7.7G  590G   2% /
tmpfs           3.9G     0  3.9G   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/loop0       89M   89M     0 100% /snap/core/7270
/dev/loop1       90M   90M     0 100% /snap/core/7917
tmpfs           798M     0  798M   0% /run/user/1000

what can cause this !?

 

[Alwin]

When discard (trim) is not run inside the VM to free empty blocks, the file will grow till its full capacity.