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Transfer speed issues on new Proxomox 8.3 setup (lemm.ee)

submitted 1 day ago* (last edited 1 day ago) by CmdrShepard42@lemm.ee to c/selfhosted@lemmy.world

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I recently posted about upgrading my media server and migrating off Windows to Proxmox. I've been following an excellent guide from TechHut on YouTube but have run into issues migrating my media into the new Proxmox setup.

Both my old Windows machine and new Proxmox host have 2.5Gb NIC cards and are connected together with a 2.5Gb switch and running on the same subnet. Following the guide, I've created a ZFS pool with 7x14TB drives and created an Ubuntu LXC which is running Cockpit to create Samba shares.

When transferring files from Windows, I'm only seeing 100MB/s speeds on the initial transfer and every other transfer after that caps out at >10MB/s until I reboot the Cockpit container and the cycle completes.

I'm not very knowledgeable on Proxmox or Linux but have run an iperf3 test between Windows > Proxmox and Windows > Cockpit container and both show roughly 2.5Gb transfer speeds yet I am still limited when transferring files.

Googling the issue brings up some troubleshooting steps but I don't understand a lot of it. One fix was to disable IPv6 in Proxmox (I dont have this setup on my network), which was successful, but didn't fix anything. I no longer see the interface when doing an 'ip a' command in Proxmox, though I do still see it when doing it in the SMB container.

Does anybody have any experience with this that can offer a solution or path toward finding a solution? I have roughly 40TB of media to transfer and 8MB/s isn't going to cut it.

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[–] non_burglar@lemmy.world 1 points 17 hours ago (1 children)

Lots of variables here, we would need to pare them down:

architecture of zfs pool? This can be done well or very poorly, zfs gives you a lot of rope, if you know what I mean.
memory?
have you tuned samba ?
are you trying to do anything fancy like jumbo frames ?
what networking equipment lies between the two?
do you have the correct and correctly configured 2.5gb driver for linux ? Intel 2.5 NICs had some issues for a while.
what does the windows net hardware look like?

In troubleshooting transfer speeds , there are solo many variables, as you can see.

Start with the network and reduce variables until you have a likely source of the problem.

[–] CmdrShepard42@lemm.ee 1 points 6 hours ago

Not sure what all to include here but the pool set up in Proxmox as RAIDZ2 with lz4 compression.
64GB DDR5 that is showing low utilization the entire time. It has never gone over 10GB usage.
I have not done any tuning or enabled jumbo frames on samba
Both machines are sitting next to one another and connected to a 2.5Gb switch that is also connected to my router's 1Gb ports. From what I gather, they shouldn't need to communicate through the router since they're on the same subnet and everything.
I haven't installed any drivers, but another user suggested using the ethtool command on the NIC and it's showing a 2.5Gb connection speed.
The windows machine has a Realtec RTL8125B 2.5Gb PCIe network card that I just purchased for this purpose. Previously I was using the motherboards built in 1Gb NIC. I have installed the driver for this on the windows machine.