Moving from Xeon to EPYC

[jfenning]

I've got a production Proxmox cluster with subscriptions running on Intel E5-2640 v3 CPUs. I'm looking at EPYC for my next refresh. My VM's are running the KVM64 CPU config. Am I correct that if I were to add new EPYC based servers that I could move them over to the new hosts without issues?

 

[ness1602]

Infortunately no, i have problems migrating from Xeon to Epyc, as i experience BSOD everytime.

 

[obsolete]

Try changing your CPU type in the hardware section of your VM configs? I generally select "host" when creating VMs.

I'm running proxmox on top of Ryzen chips, and everything works ok for me... but I also haven't migrated CPU architectures.

 

[Dominic]

have problems migrating from Xeon to Epyc, as i experience BSOD everytime.

What cpu type are you using for your VMs?

Usually kvm64 should work everywhere. See also the CPU type section in the administration guide.

 

[ness1602]

CPU is always set to default(kvm64). We have 6 Intel and 1 Epyc server, and when we migrate to Epyc server any qemu machine, it always crashed. It doesn't matter if it is Windows or Linux based. Containers are restarted on migration so we don't have that problem.

 

[Dominic]

I have assumed that this

that I could move them over to the new hosts

meant

1. stopping the VMs
2. moving them in whatever way to the new hosts
3. starting them again

Live migration is more difficult.

 

[ness1602]

No, i'm talking about live migration, this is the only problem with the heterogeneous arch i have encountered. Everything else works perfectly.