Extremely slow copy/paste speed in Windows SMB share Core 13.0-U6.2

TrueNAS General
1

Hi folks,

TL;DR: copy/pasting a single ~1kb file in windows (from a TrueNAS share over SMB) brings up the Windows progress window, and takes several seconds (10-15) to ‘complete’ the file copy, after hanging out at 99% for most of the time. This screen grab is copying a 1kb file and pasting it into the same folder.
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I’ve been doing some tinkering with unrelated TrueNAS servers on VMs via proxmox. I was testing out a CORE to SCALE upgrade with both a native SCALE install, and an initial CORE install, which I subsequently upgraded. These machines are not related in any way to my main server question, but I discovered this issue while tinkering, and noticed the same issue with them (slow copy/paste of even tiny files over SMB). I deleted a bunch of fake data off of my native SCALE machine, to practice rolling back to a prior snapshot, which I did, and worked fine. As I was double checking the data, I noticed that the files open just fine, immediately. But, if I try to copy/paste just as I did above, I get the same, slow result. Deleting files does a similar thing (slow).

I opened a shell and did a copy of the same file in the same folder from within TrueNAS itself, and it works immediately there. So, I’m not sure what else to try and troubleshoot.

ETA: I don’t recall this happening before, normally, if I copy even an entire folder from within Windows, it seems to copy nearly instantly.

2ndETA: I rebooted my Windows machine (again), and this time, made sure to try my ‘main’ TrueNAS share copy/paste. It worked perfectly. What seems to not be working perfectly is doing this on my SCALE install I was testing things on. There appeared to be a latent copy/paste test on the SCALE share that never finishes, and if I try the SCALE machine first, it continues happening until I reboot the Windows machine.

2

Well, I’m still not sure what happened, but after multiple reboots of both host and the VMs, I don’t seem to have the issue anymore. I wasn’t able to find any processes that should have been causing slow performance or anything. Chalk it up to solar flares.

3

I’ve seen very very poor network speeds sometiems when using virtio networking inside nested vms.

Is it possible its something to do with the way the VM was setup?

4

Hey @Stux, thanks for responding. I don’t think networking is the issue. I don’t have any fancy networking setup within Proxmox. latency is very low (1ms), and transfers between VMs are very fast. For example, when backing up VM 1 to the zfs pool in proxmox, I get transfer speeds up to 3gb/s (the proxmox machine has 10gb networking).

Also, given that I haven’t changed anything in the vm setup (including networking), before and after this happened, leads me to believe something else was at play.