@jedimarcus perfect, thank you for the confirmation!

No you can't "transform" CentOS to XCP-ng.

Hello So, you can of course makes some config by hand to alleviate some of the cost of the architecture on virtualization. But like you can imagine, the scheduler will move the vCPU around and sometimes break the L3 locality if it move it to a remote core. I asked to someone more informed than me about that and he said that running a vCPU is always better than trying to make it run locally so it's only useful under specific condition (having enough resources). You can use the cpupool functionality to isolate VM on a specific NUMA node. But it's only interesting if you really want more performance since it's a manual process, and can be cumbersome. You can also pin vCPU on a specific physical core to keep L3 locality, but it would only work if you have little amount of VM running on that particular core. So yes, it might be a little gain (or even a loss). There is multiple ways to make the core pinned, most with xl but if you want it to stick between VM reboot you need to use xe. Especially since if you want to pin a VM to a node and need it's memory being allocated on that node, since it can only be done at boot time. Pinning vCPU after boot using xl can create problem if you pin it on a node and the VM memory is allocated on a another node. You can see the VM NUMA memory information with the command xl debug-key u; xl dmesg. With xl: Pin a CPU: xl vcpu-pin <Domain> <vcpu id> <cpu id> e.g. : xl vcpu-pin 1 all 2-5 to pin all the vCPU of the VM 1 to core 2 to 5. With CPUPool: xl cpupool-numa-split # Will create a cpupool by NUMA node xl cpupool-migrate <VM> <Pool> (CPUPool only works for guest, not dom0) And with xe: xe vm-param-set uuid=<UUID> VCPUs-params:mask=<mask> #To add a pinning xe vm-param-remove uuid=<UUID> param-name=VCPUs-params param-key=mask #To remove pinning The mask above is CPU id separated with comma e.g. 0,1,2,3 Hope I could be useful, I will add that to the XCP-ng documentation soon

@bassmann I think the terminology you are looking for is terminal server. I also think that is not native functionality of xcp-ng.

Olivier asked me the same. And it worked fast. But for some reason that Problem is just gone today and I have no Idea what it could been. Most plausible is something was running somewhere in the background, but since the CPUs were Idle and no I/O to speak of... I am lost. Also why did it try to copy the whole volume to the same SR it was copying from, guess we will never know.

You need the data right? Not the OS etc? Does your infrastructure work? Do you have any other VM running? I'd have another VM running and then attach the disks in question to see if they are: A. readable B. the one you are looking for

Can't help with your issue, but wanted to point out that the article you linked only references Xenserver 6.X, so may not be applicable to newer versions.

@trent234 I think system should run headless and Xen should be able to hide that device from dom0, can you reassure that BIOS is set to not use any display device?

As song as you have Grub, it should work.

@olivierlambert Hey i have another question, If i run the VM on the second Server does it matter if the RAM is the same althought CPUs are the same? Make and Model of the RAM or can that cause a problem? Another question if i have Host 2 online and i run different VMs on each of the host meaning Mail and Web Server on one host and Cloud Storage Server on the other using the same iSCSI storage can this be done by adding a second host to XO? or could it be possible to combine both servers into 1 for more Memory? Cheers. Jack.

When I issue the shutdown command to the host / physical machine via xoa, the process does not occur. it gives an error. Stop no hosts availeble

Looks like this documented issue: https://xcp-ng.org/docs/troubleshooting.html#ubuntu-18-04-boot-issue (found by looking up "ubuntu" in the docs)

@jedimarcus said in Host status in xcp-ng center: @mistercutter /var/crash ? Cool. I'll find them. Thanks again for the quick response.

@apz No, I have not done any such customizations. @olivierlambert Tried with tsc clock, same result. rngd started to eat 50-100% of cpu right after started it, However I just tested how Oracle runs if the rngd service is stopped....and looks like no problems. So the solution seems to be just stop and disable the rngd service and everything works the same they did in bare bone hardware! Thanks to everyone who helped with this!

Hi, There's a vTPM object: https://xapi-project.github.io/xen-api/classes/vtpm.html

@gskger I could. I also have a very janky solution laying around, in the form of a Mini PCIe to PCIe adapter that could replace the ProDesk's Wifi card. I could then plug in a bog standard Intel PRO/1000e Quad Nic card. Haven't got around to trying that though.

@olivierlambert /opt/xo/xo-builds/xen-orchestra-202025111215 /opt/xo/xo-builds/xen-orchestra-202026112158 Thats when I ran the builder before the currently installed one.

@glitchy This weekend everything moved to 8.2. Windows 2008 works as before. Management agent version 7.2

@r1 Yup, see https://gist.github.com/vegarnilsen/dce2b5c17cf188f1fa2c7615dc6fefc4 for the modinfo and lsmod output. @tuxen Since we're not using FibreChannel, I disabled fcoe before the latest test, see the gist above for info.

I'm asking because I need to increase my pool's CPU resources, the easy way is buy the same processor, but thinking in a more powerful option, RAM and networking features are ok, but compute performance is being starvest by some VM. I have an old pool, which I had to upgrade some years ago, but no more original model components were available, so I had to buy a new model, new cpu generation, so it became an heterogenous pool. The problem was not the lost of new cpu features, the problem is that time to time, when I performe a live migration VM, it hangs and I must reboot the VM. Keeping in mind to avoid and heterogeneus pool, I think the safest option is 5220S, because 6226R implies more changes which I unknow in the architecture, maybe new features, that's what I unknow. Any piece of advice?