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Yes. If I will have that possibility, I test that, but I'm sure that problem still here because design. You need fast and robust backup server to make any kind online backup. I use proxmox PVE from v 4.0 and problem still here. It's design. I hoped that PBS uses other design but not, I've...

If backup process hangs for any reasons, there is a lot of problem after that... You can see that. It's my production. Thank for you did not answer me in that topic. Hope that proxmox stuff will answer me.

That problem is common (and still here) and described in wiki: https://pve.proxmox.com/wiki/Backup_and_Restore see section VM Backup Fleecing If you can answer for my other topic witch is related to that problem I will be glad -...

Dear all, could you tell me what will happen if my backup fleecing device out of space? - For example, if my PBS will go offline during any network issues and so on.

No. I realized that problem comes from bad design of proxmox at all. For try to mitigate impact of my problem I need to have consider use PVE v 8.2 with use of Backup fleecing (advanced feature) or switch to pve-zsync

Dear all! I use proxmox VE v 7.3-4 with PBS v 3.2-2 for a long time. I missed out space on my pbs and after that my backup job stacked with error msg: INFO: issuing guest-agent 'fs-freeze' command INFO: issuing guest-agent 'fs-thaw' command INFO: started backup task...

It is possible but limit. I use PCI passthrough + rdp for that. OS guest is Windows.

If you have fsync writes from a VM you absolutle need to use killer feature of zfs - zlog ssd cache (enterprise level with a capacitor). If you have many read you can use l2arc with tune to write any data on it and make it persistence! - That is another killer feature of zfs. If you have many...

Did you see new version of proxmox (7.1)?

oh... I think you are right. I have problem with totally hangs of my vm during backup, with message of guest vm like: i/o timeout... I have so slow backup storage... :(

I have the same problem. I have a solution just move client_max_body_size 5120m; to top of file, please see my confing file: client_max_body_size 5120m; upstream proxmox { server "bve-01.company.ru"; } server { listen 80 default_server; rewrite ^(.*) https://$host$1 permanent; }...

Thank a lot for you! I'll use it!

There is another moment: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-guest_virtual_machine_device_configuration-random_number_generator_device I'm not deep in this, but I suppose if you use program urandom...

Did you understand for zlog at all? zlog works only with a database, the zlog may tell you db engine I'm write your data when a real data is on RAM and SSD cache, after that zfs will write your data to disk from RAM. zlog SSD will have only if power cut situation. zlog is very good for exmaple...

No. I have lose my data. That is not safe! Don't use it in production.

Yep, I can confirm that, because I have this bad situation...

Thank a lot for you answer! I have a doubt about disable sync=disabled... What will with your data in "power cut" situation?

I understand for non best performance. I have read about btrfs still improve from time to time in current linux kernel. Do u have real production use btrfs or just read about bad for use it?

Dear all, I want to have urbackup VM and I want to use btrfs killer feature (cross link, offline dedup and so on) with urbackup. What do you think if I will have zfs (zvol) as my host fs and btrfs as a guest system? Best regards,

If I will use pvecsr and pve-zsync will I do have mistake like zfs cannot destroy snapshot dataset is busy? For example: pvecsr and pve-zsync run simultaneously. pve-zsync still under work but pvecsr wants to delete old snap - what will happen? Thank a lot for you time.