All, in the past I used to stack VMs based on RAM on hosts by putting the following settings in my nova.conf file: ->ram_weight_multiplier=-1.0 ->available_filters=nova.scheduler.filters.all_filters ->enabled_filters=RetryFilter,AvailabilityZoneFilter,CoreFilter,RamFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter I have now a Rocky installation and although I have set the above on my controller node and restarted corresponding services the result when spawning two VMs (one after another) is still to be distributed on two different hosts. Seems that the something is missing in order to override the default behavior. Any suggestions please? Best regards, G.