OMV, proxmox and Green IT

  • Hi
    I continue to prepare my migration from OMV to Proxmox with OMV as VM, and I have a question for the clever guys (you! :) ) who are already using OMV+proxmox.

    Proxmox has no option in its GUI to set any powersaving feature. It even runs the performance governor by default. So, for a home server (expected to be idle 70% of the time) where 'Green IT' and power consumption matter,
    - have you looked at how much power OMV+Proxmox consumes versus OMV alone, notably when idle?
    - is there anything you change to lower power consumption?

    Just for info, my OMV box (Ryzen 2700, 16Go RAM, 4 active SSD and one mostly-sleeping HD) consumes 27W at idle at the wall and 70W at full load (real power, with cos phi : 41W / 80W).

  • I haven't looked at this but my server is always busy. I would try changing the governor but most power saving ideas probably would negatively impact running VMs.

    omv 5.5.11 usul | 64 bit | 5.4 proxmox kernel | omvextrasorg 5.3.6 plugins source code and issue tracker - github

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  • I run a proxmox 3 node cluster with several OMV vm's and one freenas VM.

    My nodes are all dell: one R720xd and two R620's (All my OS disks and disks used for VM's on the hosts are SSD's / NVMe)

    My systems run 24x7, but I am also a little concerned about power usage, so I do the following without really any noticeable performance issues.

    - on the proxmox host I change the governor from performance to powersave, this does the most with a 20 to 40 w drop
    - my OMV VM it is a little more complicated:
    - I have 20 disks running in a separate disk shelf connected through LSI 9300-8e; The HBA is passed from the proxmox host to the VM (PCI passthrough), which allows the OMV vm to see the disks directly and have full control. I have the disk set to go to sleep through the smart setting within OMV, which saves a little power.

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