app/models/ems_cluster_performance.rb
class EmsClusterPerformance < MetricRollup
default_scope { where(:resource_type => "EmsCluster").where.not(:resource_id => nil) }
belongs_to :ems_cluster, :foreign_key => :resource_id
def self.display_name(number = 1)
n_('Cluster Performance', 'Cluster Performances', number)
end
end