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OpenStack VCPU Instance VCPU Limit


I am running OpenStack on a CloudLab OpenStack Profile with 8 Nodes which should allow me to create instances with up 160 VCPUs (Taken from OpenStack Admin Host Aggregate Options). Although, when I launch my instance, it only allows me up to 20 VCPUs and the distribution of these CPU is about 4 VCPUs in each physical node and some have no VCPUs. I just need to get more instance to get more memory on my cloud to test my new backup software.

Can anyone help me figure this out?