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Root is not on ZFS. Target disks are smaller than source. But I can work with rsync around that. If I do a fresh install and physically move the datastore to the new machine, will all settings be restored magically?

I currently have an 8 drive PBS server. But we're getting to the max of what it can take. So we need to move to a larger chassis. The data is on ZFS disks, so that part is taken care off. Two questions: - How I do migrate all other PBS settings/logs etc. - How to import the existing dataset...

Sure. But on the used market you will find that they might be more expensive than it's bigger brother :) If I had the choice I'd go for SN2700's, very attractive price point. Overkill? Yeah, for now, you never know in the future. You can get break out cables to 4 x 25.

Yeah, but not stacked as in Cisco or FS style. You configure both switches with an MLAG In between them. After that you create a port channel for each port on each switch. We have this running in production. If you go the used route, keep in mind you want to replace the disk.

You could use HA groups to do this.

I don't know if you can disable it in the gui, but whatever you do, keep the system root user alive. It's used for a lot of things in a cluster.

iSCSI vs NVMEoTCP is just a different protocol, functionality is the same.

I see. Can't help you with that, only saying we've had great experience with vita, it's performance is phenomenal.

It's basically a rewrite of ceph. Smaller and way better when it comes to performance. Performance compasrison can be found here https://vitastor.io/en/docs/performance/comparison1.html. Somewhat older versions, but the differnce is still as big. Been using it for a while now, very happy with it.

You could try vitastor, runs circles around ceph when it comes to performance.

“Host” is always best.

+1

Nothing in the output of ipmitool sel list ?

Not specific to Ceph, but for one cluster I went the used Mellanox route, SN2410's. Dirt cheap on ebay, relatively, very low latency. Needed 2 sets of these, instead I bought 6. 2 hot spares for 2 sets is enough redundancy :) 48x25 & 8x100 gbit each.

Never ever do consumer grade disks. You’ll be disappointed. Only question is when.

See https://forum.proxmox.com/threads/zfs-zvol-import-to-existing-vm.133824/

Have you tried a higher MTU of like 9000?

Currently we're running a PBS server containing 10 Samsung PM983 7.68 TB NVME drives. But.. we're coming to the point where we need to upgrade. Performance is excellent, but limited storage space. I have no extra bays available for more drives. The only option would be to upgrade each drive to a...

Sure. We found out one core in the ipsec endpoint (pfsense) on one side was running at 100% load and was limiting the transfer speed. After enabling MSS clamping (preventing fragmentation) and Asynchronous Cryptography (use multiple cores for multiple ipsec functions) transfer speed started to...

Little ashamed to say the issue was found and was not in PBS. The ipsec tunnel endpoints had some issues. Now that these are resolved we can completely fill the gbit connection.