I finally got my lab updated and the two vms started, so far so good. Stats data is present, the first time I've seen any of my hosts pull 100% CPU. Hosts are little HP T740 thin clients with AMD V1756B processors and 64GB of ram, in a 3 host pool.
Sorry I can't bring more detail, not really doing work on my XCP lab right now, and lots of shake up around tech. space at work.
I decided to burn my lab down because of some trouble and wanted to start fresh to isolate any problems I may have created in the past. Wiped the disks, built a new NFS share ready for work, installed the XCP-ng OS and configured networking for the management interface on the local machines, all normal stuff. Went back to my desk and logged into XO Lite on each machine, using console --> xsconsole I was able to get all the hosts into a pool, and add an ISO and NFS SR, all seemed to work.
Went to the New VM to create a simple Debian vm on which I intended to host XO-CE from sources. Typed the info in, chose the Debian image from my ISO SR, the rest of the config as normal. Uncheck the boot after creation box, and create.
Click on the VM to bring the console up, then click power on... UEFI loader comes up, and ... Can't find the boot disk. Tried another iso that I knew was capable of EFI boot, same.
Realized I was trying to start in EFI, made a new one in BIOS mode, this one worked but now my screen shots are messed up so I'll probably have to go through and delete stuff with a different XO and go back to grabbing images of the process to write up "for the next guy".
Other than this small issue, it's working and doing it all from XO Lite. Yes still a bunch of missing features, but I know you are working on this. I just wanted to try things this way on this fresh build and see what I could get done from local console and XO Lite.
HP T740 with 64g of ram, 256g sata for OS, optional nvme for faster storage, optional 10gbe networking through low profile card. Works great for my lab.
Ran vSphere8 on three of them, running Harvester on 3 of them now. XCP-ng and vSphere8 work great, Harvester is a bit more resource hungry. Only the bottom three have nvme and currently have Harvester 1.7.0 running while I try to find time to learn more about this system.
My production pool upgraded fine as far as I can tell, but not so good with the windows drivers, I'll make a thread on the drivers.
Nothing really to add, my 3 host Intel production pool updated just fine. The load balancer is always a little weird, but I'm sure it is calculated based on CPU and RAM assigned to each VM, where I split things up based on workload.
It's a small system, and the real workload is handled by 3 Windows VMs so I tend to split them up onto one of the three hosts.
I may get to my lab in the next couple of days, but it isn't doing work so testing is kind of pointless right now. The only thing "doing work" is a VM with XO from sources.
Did my production this morning... Not a smooth upgrade this time.
The master took so long that the process timed out, I can't tell too much more because I was doing other work and was doing this remotely.
I handled the next host manually, and that took so much time I gathered my hearing protection and went over to the rack. It was stuck in a reboot phase but hadn't shut down for about 20 minutes. Held my finger on the power button. booted back up with a couple reboots in the process and it finally was ready.
Moved the VMs off the third host, manually triggered the update, and sat and watched looking at the VGA output to see what was happening. The reboot phase saw the XCP-ng animation progress all the way to an empty bar, but sat there another 5-10 minutes until I again held my finger on the power button to shut it off. Power up and after a bit of time it was ready again. All in all, updating three hosts took me around 2 hours today.
Here's the one condition that I think could contribute to this issue:
I have two NAS normally connected, an ISO and NFS connection on each. One of the servers is powered down for construction, but I did not disconnect it from the hosts. Could this severed connection be the reason why my updates took so long, something around not being able to purge or drain the state before the reboot?
I've disconnected those SR from the hosts, and I'll probably do a rolling pool reboot later today or next week and see if things go better.
And all that said, my XO sources is not happy with this update. XO6 isn't grabbing the data so dashboards are blank or take a long time with spinning wheels gathering the data. XO5 is immediate. One of my XO sources updated this morning, the other was yesterday so they should be pretty close to current.
BTW, the ram increase made zero difference in the VDI migration times.
I may still change the ram for each host in production, but I only have like 12 VMs right now and probably not many more to create in my little system. Might be useful if I ever get down to a single host because of a catastrophe. Currently running what it chose for default at 7.41 MiB, roughly doubled that in my lab to see what might happen.
Just got my VMware lab started so all this other stuff is going to back burner for a while. I will say I like the basic ESXi interface that they give you, I can see why smaller systems may not bother buying VCenter. I hope XO-lite gives us the same amount of function when it gets done (or more).
I was looking for a way to mark this solved, can't find it.
I haven't moved things, but after migrating my big lab to my mini-lab, I'm confident that the warm migration is the way to go. It was fast and seamless as long as you have the right network adapters set up. I had to fool with one of my networks to make a VM function, but that was certainly something I overlooked while setting up the mini-lab. A little testing before moving the VMs should make this go easily if using the old servers is the option for this project.
I need to update a few things and then I plan on trying to see if this was fixed for me. I think I only had 2 Windows machines that were a problem, and only on machines that had a larger disk and were basically empty. The counting zeros seemed to lead to a time out. Just haven't had the time to look at much of anything lately.
Thanks. I'm still going to wait until next week, my schedule just doesn't give me the time right now. But nice to know that when I do update, it will be fixed and my laziness prevented a problem for me 
I think I'll get my pool updated today, only been waiting a week at this point.
@coolsport00 You actually referenced my post, so I referenced yours as backup to the condition still being present. I think we just need to wait for them to finish making XO-lite what they seem to intend it to be, I think it's going to be good and I think they are doing a great job so far.
Also, I have a post somewhere about the UEFI not working from XO-lite, maybe they can be merged?
Having what is essentially XCP-NG Center from a browser would be nice, no more need to install something on a Windows machine just to get some basic stuff set up until you get a full XOA instance running. Yes I know you can just grab the demo with a single command, but sometimes you want to configure a few things first.
Tom Lawrence has a bit hub with all the artwork that he uses, you might want to find that and check it out.
Documentation is the first thing to get pushed to the back burner, same in my area, same in my larger IT department. Never enough time to document things correctly.
I need to get going with Netbox and see if I can make this speed up what I want to document.
Ummm... Your documentation sure makes a lot of us jealous!
Was that just a layout program like draw.io, or are you using something like Netbox for that work?
I'm starting on GLPI to handle more than just flow paths going forward, need to track serial numbers, date of purchase, maybe installed software as I go forward. A project for the summer.
So there might be two other things to look into if you get bored.
I wish I had newer generations of the big HP DL360 on the bottom, mine do not support uefi, and that's getting in the way. Sitting power off to keep the bios battery from running down. Those are 20 cores with 128gb each, and again 10gbe networking.
It is not cheaper, but it draws about half the power when idle. When doing work the power still gets up there, they are 60-90 watt computers, which is still less than the 300 watt capable HP servers at full go.
If you really stress your lab a lot, real servers are a win as they will draw less power for more performance, but if yours is like mine and it idles a lot, cutting the power is nice. I'm about 200 watts at idle with the above, and that's two labs worth. I was 400 with the single old lab system.
Mounts are cheap book ends, drilled and screwed to that specific shelf, and drilled for short m4 thumbscrews to get into the VESA mount on the t740.
If anyone reading this wants to duplicate, and they see HP T755 cheap enough, I recommend these because it has 6 cores / 12 threads over the t740 with 4 cores / 8 threads. Both are DDR4 sodimm and top out at 64GB. Both have a PCI 3.0 x8 (x16 slot) that takes half height cards. And if the BIOS is locked, you can write over them with a programmer and enter the data needed to function (see badcaps forum for my guide).
Here is mine
HP DL360e Gen 8 for Truenas, 96GB of RAM, more processors than it needs, and 8x500 drives, NFS share for the VMs
3x HP DL360p gen 8 for XCP-NG with 128GB of RAM and 20c40t worth of processors.
10gbps networking to a Mikrotik switch, also an old Cisco 2960s for a second gigabit network (with POE+)
There is also a cheap GPS/GNSS NTP clock at the top of the rack, just too far to show these other items.
I like the spinning lights on the drives, just wish it was a little faster.
Thank you, that's what I thought and why I was willing to buy the lower end CPU in order to get the project through. At the time going for the larger Gold would have doubled the cost of each server.