[PVE-User] Cluster mixed hardware behavior (CPUs)

Roland @web.de devzero at web.de
Fri Apr 26 16:56:36 CEST 2019


>will run at the lowest common denominator. In other words, if you have 3
>hosts each with CPU frequencies being 2.1 GHz, 2.3 GHz, and 2.5 GHz
>respectively, the entire cluster will run at a 2.1 GHz level.

huh, really? never heard of that, where is that information from?

from what i know, clustering is about cpu features, not speed, see
https://communities.vmware.com/thread/545610

What vmware does is EVC ( https://kb.vmware.com/s/article/1003212 ) ,
that way you can mask what cpu features/instructions should be used
within the cluster.

my proxmox knowledge is limited, but from what i can see you set what
cpu features being used at VM level (hardware ->processors ->type)

roland




Am 26.04.19 um 14:05 schrieb Craig Jones:
> Hello,
>
> To my understanding, in the vSphere world, a cluster with hosts of mixed
> CPU frequencies and generations (let's assume consistent manufacturer)
> will run at the lowest common denominator. In other words, if you have 3
> hosts each with CPU frequencies being 2.1 GHz, 2.3 GHz, and 2.5 GHz
> respectively, the entire cluster will run at a 2.1 GHz level. Is this
> the same in the Proxmox world or what would be the equivalent behavior
> for a Proxmox cluster?
>
> Thanks,
> Craig
>
>
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