A VM is contained in a single compute node. There is no way for a VM to
"span" several nodes.

On 2022/08/10 3:56 PM, 정재철 wrote:
> If there are many nodes, is it possible to create a high-performance VM?
> (e.g. Can 2 1 core cpu nodes create 1 2 core cpu VM)

A brief Google search found this research project called GiantVM which is implementing a distributed hypervisor [1] [2]. But of course in the context of OpenStack or production systems in general, your answer is completely valid.

[1] https://giantvm.github.io