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@smueller Perfect! I just tested a Proxmox backup of trimmed VM and it finally works as I need!!! I appreciate your help. Now I am able to create Wiki tutorial for my friends for this topic.

I miss your previous answer about using command systemctl start fstrim.service I tried it and gonna make a Proxmox backup for testing. Then I will let you know.

@smueller I am very glad for your answers. Unfortunately I am not IT pro or a programmer so I want to solve this issue as simple as possible. That is why I ask numb questions. I read the admin guide but I did not find any helpful information. So if I understand it right I can connect to my VM...

Hi @smueller There is my configuration for the disk (it is NVME type)

Hello, I’m facing a similar issue as described in this thread. I have a VM with Ubuntu Server 24.04 on Proxmox 8.3.1. After deleting a large amount of data in the VM (from approximately 1 TB down to ~300 GB), I expected the free space to be released on the ZFS level. However, the backup size...

Problem Solved as Follows: Access VM01 (103 in my case) Settings: In Proxmox, select VM01. Navigate to the Hardware tab. Select the 2 TB HDD: From the hardware list, select the 2 TB HDD attached to the VM. Change Disk Settings: Click on Advanced. Disable the Backup option. Result...

Hello, I would like to ask for advice regarding backup settings on my home Proxmox server. I am using Proxmox Virtual Environment 8.3.1 Free Edition. Hardware Setup 4 TB NVMe disk: Hosts Proxmox and several virtual machines (VMs). 2 TB HDD: Attached as a separate disk to VM01 for storing...

Thank you for your reply. Please check the attachments.

Hi all, I'm having an issue with my Proxmox server. I'm running Proxmox v.8.1.3, and I have a virtual machine running Ubuntu server 22.04.3 with Nextcloud AIO v 7.9.0 installed. I've assigned the VM 12 GB of RAM (no ballooning) and 8 CPU cores. During normal operation, the VM uses up to 7GB of...

I have the CPU - Intel Pentium Gold G6400 - https://benchgame.com/en/cpu/2116-intel-pentium-gold-g6400 I like to install MongoDB 5.0 on my VM with Ubuntu 20.04.4 as docker. When I tried to install the docker I saw this error message. WARNING: MongoDB 5.0+ requires a CPU with AVX support, and...

So I found a solution for me now. Compression ZSTD (fast and good) Mode: Stop Settings for HDD in the virtual machine Discard - Enable SSD Emulation - Enable Backup - Enable Oťher settings are disabled. I am back to 300 GB now from 460 GB. Thank you once again.

Thank you for your reply. A lot of new ideas from you. :cool: Are you using LVM thin provisioning in the VM? - I do not know how to check it. Can you try a backup with LZO to see what size it is? - I will try it. It is a great suggestion. Is Discard enabled on the virtual disk? - Of course...

I am afraid that I will lose my data because there is my Nextcloud server. I am thinking about what kind of old data is "hidden" and how can I find it and remove it manually, There are some old snaps of Nextcloud I suppose as well.

tony@nxtc:~$ sudo df -h [sudo] password for tony: Filesystem Size Used Avail Use% Mounted on udev 1.9G 0 1.9G 0% /dev tmpfs 348M 1.1M 347M 1% /run /dev/mapper/ubuntu--vg-ubuntu--lv 2.7T 321G 2.3T...

Backup ended after 4 hours.... filesize 462 GB :confused: No change. It did not help. Another idea?

Thank you for your reply. Now I understand you perfectly! :) Your explanation is easy to understand. I gonna try your solution and let you know about the result.

Thank you for your answer. Unfortunately, I am not an advanced user of Proxmox, a beginner only. That is why I do not exactly understand your reply. I attached a screenshot of my VM configuration. Any idea is welcome.

Hmm... a few weeks ago everything was working fine but after some updates on Proxmox, it changed. Reason unknown. Any other idea?

I have created RAID1 -> mirroring the first HDD to the second HDD (both hard drives are the same) I use 2x 4TB hard drives.

Yes, it is ZFS and RAID1. I used default values during the installation process. What should I do? Thank you for your answer.