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First, dd ist Not a good tool for benchmarks. Second,using ZFS on a RAID controller is not good practice. ZFS wants the disks as naked as possible and a RAID controller abstracts too much from the physical disks and has its own cache which can interfere. Third, ZFS can be configured in many...

Have you checked if there are firmware updates available for the SSDs? Otherwise, if you can spare one SSD, I would perform some benchmark and write tests on it to see if similar behavior can be observed.

While not perfectly correlated time wise this is still interesting: Apr 10 13:06:33 pve-us smartd[4841]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 194 Temperature_Celsius changed from 99 to 97 Apr 10 13:06:33 pve-us smartd[4841]: Device: /dev/sdb [SAT], SMART Prefailure Attribute...

Nothing in the /var/log/syslog or /var/log/kern.log? How are the drives sda-sdd connected? All on the same controller?

Anything in the sys or kernel logs around the times before you see the drop?

@toddimus while your argument is not a 100% technically correct, it is true in this situation. # ipcalc 10.102.0.0/16 Address: 10.102.0.0 00001010.01100110. 00000000.00000000 Netmask: 255.255.0.0 = 16 11111111.11111111. 00000000.00000000 Wildcard: 0.0.255.255...

Spricht etwas gegen den Proxmox VE installer? Wenn nicht wird es wohl am einfachsten sein, du installierst damit nochmal neu und wählst während der Installation (bei der Dateisystemauswahl) ZFS aus mit RAID1 um den Mirror zu bekommen. Dann sparst du dir dieses herumgetue mit MD RAID? auf ein...

user: root pw: whatever you set during installation make sure that the Realm is set to Linux PAM!

Btw, which EPYC model do you have installed? I am just reading up on it again so this is from memory and probably not technically 100% correct. EPYC Naples (1 at the end of the 4 digit product code) has Numa nodes because they had to group the chiplets and not every chiplet has the same fast...

That would have been my next guess and something that I will check on the next boot of that server, if I don't forget until then ;)

which command did you use to get that output? On a AMD EPYC 7302P 16-Core Processor I get the following: # dmesg | grep -i numa [ 0.006392] No NUMA configuration found

Too bad but I guess you need to use the machine in production and cannot tinker around for too long. It would have been interesting to know what the cause was. I doubt that it was the same problem that LTT encountered in that video because you are far from having that many really fast SSDs...

Well, you have it in you container config that it will use vmbr0 as bridge to connect to any other network. Your network config needs to be adapted then. An example config that you would also get if you use the installer or GUI to set up your network would be: iface eno1 inet manual auto...

yes yep having the IP set on the bridge port and not the bridge is not a default setup. that might cause some issue but I am not sure. The webui should still be reachable. After a regular install with the installer that would be the setup you have out of the box. Not sue if it would be the...

AFAIR the number of max backups is set for each storage. Do you back up all VMs to the same storage or to different ones which might have a different max backup setting? The first is the running kernel, the second one the version of PVE packages. You might want to install updates. Those...

As another note, bridges do not need to have an IP set. So if the NIC which is configured as bridge port should only be used for the VMs and not to access the Proxmox UI, just don't configure an IP address. You can also create "internal" networks by not setting a bridge port.

auto enp3s0 this line looks a bit wrong, have you tried if it works when you remove it or comment it out?

Without a config of the container at hand I have to guess a bit, but I do think that your vmbr0 config is missing a bridge port. bridge-ports none is not using any of the physical NICs. Can you try to set the bridge_port to either eno1 or eno2, depending on which physical NIC the containers...

Some things I would try: Install some monitoring tool, especially to know how much of the RAM is going towards ZFS' ARC (cache in ram) and to see some stats from the disks (avg write delay, queue,...) but other systems stats might give insight as well. How did you configure the disks of the VM...

I am running ZFS on root for year now on my Arch based laptops/desktops and for quite a while on my Proxmox servers. You should consider that whatever problem you read about here in the forum is a small part of the happily working 300.000 installations out there.