[SOLVED] best CPU type for live migration between 2 different hosts

[manilx]

Hi

I have 2 Protectli FW6E with 8 x Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz (1 Socket)
I have all my VM's with CPU type "host". Live migration always works fine.

I now added a new MINIS FORUM NPB7 with 20 x 13th Gen Intel(R) Core(TM) i7-13700H (1 Socket)

Tried live migration and VM's froze. Then I remembered the CPU type.
Which CPU type should I choose to be able to live migrate between the different hosts? But which also has the best performance.

Thx in advance!

 

[manilx]

Tried Westmere, Penryn, qemu64, kvm64. Can live migrate from the Protectli to the Minis Forum but if I migrate back the VM freezes.

 

[aaron]

Usually the oldest architecture that you have in the cluster if you want to use as many instruction sets as possible.

Maybe it is also necessary to use a newer kernel on the host itself. You can install the opt-in Kernel 6.2 and test if it works better with it running on both hosts. https://forum.proxmox.com/threads/opt-in-linux-6-2-kernel-for-proxmox-ve-7-x-available.124189/

 

[manilx]

Usually the oldest architecture that you have in the cluster if you want to use as many instruction sets as possible.

Maybe it is also necessary to use a newer kernel on the host itself. You can install the opt-in Kernel 6.2 and test if it works better with it running on both hosts. https://forum.proxmox.com/threads/opt-in-linux-6-2-kernel-for-proxmox-ve-7-x-available.124189/

Aaron,

If you look at the 2 CPU's I posted of the 2 hosts, could you please specify, which one I should choose in the VM? Really appreciate the info.

I can install the newer kernel if you tell me that it would work better... Had no issues with the 5.x until now.

 

[manilx]

Worked with SandyBridge. Don't know if this is the best one with the 2 hosts CPU's....

 

[alexskysilk]

can you spin up vms on the new node at all?

 

[manilx]

can you spin up vms on the new node at all?

VM's work on every node. That's not the issue.
Problem was different CPU's and live migration didn't work.
Solved: see above