def create(options = {}, &block)
      builder = RRD::Builder.new(rrd_file, options)
      builder.instance_eval(&block)
      builder.save
    end
def create(options = {}, &block)
      builder = RRD::Builder.new(rrd_file, options)
      builder.instance_eval(&block)
      builder.save
    end
Creates a rrd file. Basic usage:
  rrd.create :start => Time.now - 10.seconds, :step => 5.minutes do
    datasource "memory", :type => :gauge, :heartbeat => 10.minutes, :min => 0, :max => :unlimited
    archive :average, :every => 10.minutes, :during => 1.year
  end