Replication to different core count

[dhuebner]

Hi Everyone,

I just setup a replication between 2 Hyper-V Hosts. The source host has 16 cores per CPU and the destination host has only 12 cores per CPU.
So the settings of that VM on the source host says 16 processors per NUMA which is correct but I can see that this setting is not changed on the destination host. So this differs from the native settings that host has usually (max 12 processors per NUMA).

Is that something i should change?

[HannesK]

Hello,
and welcome to the forums.

I would always try to fit a VM into one NUMA node. As an alternative, virtual NUMA could be used.

Whether you "should" change, can probably only be answered by a benchmark test.

Best regards,
Hannes

[nmdange]

If the VM fits within a single NUMA node on the destination host, then the guest NUMA settings make no difference. It also doesn't matter that much if your Hyper-V host has the "Allow VMs to span NUMA nodes" option enabled.

Here's a good deeper dive into how NUMA works with Hyper-V VMs https://www.starwindsoftware.com/blog/a ... a-settings