Bases: nova.scheduler.filters.ram_filter.BaseRamFilter
AggregateRamFilter with per-aggregate ram subscription flag.
Fall back to global ram_allocation_ratio if no per-aggregate setting found.
Bases: nova.scheduler.filters.BaseHostFilter
Only return hosts with sufficient available RAM.
Bases: nova.scheduler.filters.ram_filter.BaseRamFilter
Ram Filter with over subscription flag.