I have been having a few issues recently, and I can’t quite figure out what is causing this. My setup:

  • gigabit WAN up and down. Run speed tests regularly and get 800+ mbps up and down.
  • opnsense router VM (proxmox) running on a lenovo m920x. Installed an intel 2x10gbe card.
  • Sodola 10gbe switch
  • TrueNAS server (bare metal) w/ 10gbe serving the media files over NFS, stored on a ZFS mirror.
  • Jellyfin LXC
  • debian LXC running the arr stack w/ qbittorrent
  • NVidia Shield w/ ethernet

First issue is extremely slow downloads on qbittorrent. Even if I download an ubuntu iso with hundreds of seeders will sit around 1 mibps. Media downloads with ~10 seeders, I’ll sit around 200kibps. Running this through gluetun and protonvpn wireguard with port forwarding enabled and functioning.

Second issue I’m having is if I am downloading anything on qbittorrent, and attempt to play a 4k remux on Jellyfin, it is constantly buffering. If I stop all downloads, immediately the movie plays without issue. 1080 files play without issue all the time.

I tried spinning up a new LXC with qbittorrent, and can download ubuntu isos at 30+ mibps locally and not over NFS.

Any idea what could be causing this? Is this a read/write issue on my TrueNAS server? Networking issuing causing the NFS to be slow? I’ve run iperf to the TrueNAS and getting 9+gbps.

  • @just_another_personEnglish
    2•5 days ago

    Are all your containers running in bridged mode or host mode?

    Also, how many cores are assigned to these containers?

    • @[email protected]OPEnglish
      1•5 days ago

      The Jellyfin LXC has 4 core, and the Arr stack w/ qbittorrent LXC also has 4 cores. The containers are running in bridge mode.

      • @just_another_personEnglish
        1•5 days ago

        You have more than enough cores for each then. Probably too many. As a test, try the qbit or jellyfin one in host mode and see if the network performance changes. I’d start going down the rabbit hole of tuning bridged mode network in LXC, or just keep them on host mode.

        • @[email protected]OPEnglish
          1•5 days ago

          One other thing I changed recently is the motherboard on the NAS. The new one is DDR5 and I didnt have another machine that takes ddr5 to run the new ram through men test, and I didnt want any downtime so I didnt do it. I just powered down the NAS and started memtest. Do you think a bad stick of ram could be the culprit? At this point in just trying to rule things out

          • @just_another_personEnglish
            1•5 days ago

            Bad RAM wouldn’t present like this. You’d more than likely never get past boot with a DDR5 board having caught it with POST tests, or you’d have thrown a kernel exception by now.

            I saw you mentioned that a new LXC container didn’t have the traffic problem, so this is definitely something with config somehow.

            • @[email protected]OPEnglish
              1•3 days ago

              OK so I have done some additional testing:

              • Memtest passed
              • Added the NFS share to the new qbittorrent LXC, and the download speed dropped down to where my primary qbt is. So I believe this means it is related to the NFS share.
              • Connected the NAS to a different switch. No change.
              • Tried connecting to the NFS share through a different NIC in TrueNAS. No change.
              • Migrated the qbt lxc to another proxmox node. No change.
              • Created a new NFS share on a different pool on TrueNAS and made that the download directory for qbt. No change.

              So I believe I have ruled out memory issues, NIC issues, datapool issues, and switch issues.

              The problem is I don’t know exactly when this started.

              I did change out the motherboard on TrueNAS, and just installed the existing NVMe drives into the new motherboard and booted off of them. I did not install a new TrueNAS OS and restore a backup. Could this be an issue?

              Shortly after the motherboard change, I upgraded to Electric Eel.

                • @[email protected]OPEnglish
                  1•3 days ago

                  I tested that and I get full speeds. Upwards of 40-60mbps compared with the 1mbps I get when downloading to the NFS share

            • @[email protected]OPEnglish
              1•5 days ago

              Good points. I will finish the memtest thats running if only to have something ruled out. After it finishes I will try attaching the NFS share to the new qbt lxc and see if i get the same slow download speeds.