"net_usage_rate_average" => {
      :ovirt_key    => :net_usage_rate_average,
      :ovirt_method => lambda { |metrics| HostInterfaceSamplesHistory.net_usage_rate_average_in_kilobytes_per_second(metrics[:nic]) },
      :counter      => {
        :counter_key           => "net_usage_rate_average",