OMV5 low network throughput on 10Gbit in KVM virtualization

  • I use my OMV5 server in VM on KVM virtualization (Proxmox VE). My network configuration looks like this:


    ens18 (OMV5 VM) ----> vmbr0 (Proxmox VE linux bridge) -----> enp37s0 (Intel 1Gbit NIC)

    ens19 (OMV5 VM) ----> vmbr1 (Proxmox VE linux bridge) -----> enp38s0 (Mellanox 10Gbit NIC)


    • iperf3 bandwidth test between my PC and Proxmox VE vmbr1 = ~9.3Gbit/s
    • iperf3 bandwidth test between my PC and ens19 (OMV5) = ~2.3Gbit/s
    • iperf3 bandwidth test between my PC and ens19 (cloned VM from OMV5 and reinstalled to OMV4) = ~8Gbit/s
    • iperf3 bandwidth test between other VM and ens19 (OMV5) =~25Gbit/s


    Is this bug in virtio driver or i dont know ?

  • Hmm ok, i try iperf3 on Windows 10 with mellanox connectx-2 and looks like problem is in Windows client NIC driver... but that behavior with VM reinstall is weird. On Linux i get ~9.4Gbit for clean OMV5 and OMV4, on production OMV5 i get ~8Gbit, which is still strange but not that bad.

  • xPakrikx

    Added the Label resolved

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